Dissertations / Theses on the topic 'Neoplasm RNA'
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Velázquez-Fernández, David. "Differential RNA expression in benign and malignant adrenocortical tumours /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-578-X/.
Full textMoore, Lakisha Dionne. "Modulation of Transforming Growth Factor (TGF)-[beta]1 and its implications in breast cancer metastasis." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008p/ldmoore.pdf.
Full textFarnebäck, Malin. "Quantitative analysis of melanoma transcripts : with emphasis on methodological and biological variation /." Linköping : Univ, 2004. http://www.bibl.liu.se/liupubl/disp/disp2004/med843s.pdf.
Full textMénard, Isabelle. "Exploring the many facets of cell death." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111878.
Full textIn the second part of the thesis, the role of the RNA-binding protein HuR in cancer cell migration and invasion, as well as in multidrug resistance is determined using RNA interference to knockdown the expression of HuR in HeLa and KB-V1 cells respectively (research performed in the laboratory of Dr. Imed Gallouzi). In this part of the thesis, HuR is shown to promote cancer cell migration and invasion by stabilizing the beta-actin mRNA in a U-rich-dependent manner. Moreover, evidence is shown for the potential involvement of HuR in the phenomenon of multidrug resistance possibly through the post-transcriptional regulation of the multidrug resistance 1 gene.
Gouvea, Mirian Nakamura. "Análise comparativa dos transcritomas do córtex adrenal normal e adenocarcinoma do córtex adrenal." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-29042008-132519/.
Full textThere are important gaps in the present knowledge about adrenocortical tumorigenesis. For this reason we compared by Differential Display RNAs from a carcinoma-derived cell line (NCI-H295A) and a metastatic adrenocortical tumor and characterized 317 differentially expressed transcripts. The up-regulated genes are mainly related to cell motility and proliferation. Among the down-regulated genes, those involved in regulation of transcription, RNA synthesis and processing and chromatin remodeling were identified. Differential expression of FUTT11 and BCSC-1 tumor suppressor gene were confirmed in specific subsets of 19 adult and pediatric adrenocortical tumors and might serve as marker for malignancy. Our data revealed previously unknown aspects of adrenal tumorigenesis.
Ruiz, Jorge Luis Maria. "Caracterização de uma nanopartícula lipídica semelhante à LDL (LDE) como vetor para RNA de interferência." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5167/tde-14062011-154226/.
Full textNanoparticles are considered promising vectors for efficient and safe delivery of nucleic acids to specific types of cell or tissue, providing an alternative to viral vectors for gene therapy. However, most of these systems cannot target and deliver oligonucleotides to specific cells in vivo. The use of nanoemulsion functionally resemble low density emulsion could solve this problem, once particle is capable of direct the molecules transport to the cell through internalization in LDL receptors. Here, we describe a lipid system similar to low density lipoprotein, LDE, capable of targeting and release small interfering RNA (siRNA) to tumor cells in vitro and in vivo in a cell model that expresses multidrug resistance (sarcoma uterine cell line; MES-SA/Dx5). Were also studied the characteristics of uptake of the complex LDE-siRNA, as well as the downregulation of mdr-1 gene. The results suggest that LDE is stable and bind with high affinity to siRNAs allowing them to enter tumor cells, with cytoplasmic localization enhanced. In conclusion, LDE, binds to siRNA through LDL receptors, and promotes mdr-1 silenciament by RNAi in MES-sa/Dx5 cells, increasing their sensitivity to chemotherapeutics agents
Ghezzi, Tiago Leal. "Comparação da expressão gênica do KRAS mutante, KU70, TACSTD2 e SERIN1 em tecidos tumoral e normal de pacientes com câncer colorretal pela técnica de PCR em tempo real." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/22996.
Full textINTRODUCTION: Knowledge of the molecular pathways and of the specific alterations responsible for the unfavorable progression of patients with CCR appears essential for the development of more effective therapies. PURPOSE: To compare the quantitative expression of the genes TACSTD2, mutant KRAS, Ku70 and SERIN1 in samples of normal and tumoral tissues of patients with CCR and to relate their expression to clinicopathologic characteristics. METHODS: 37 patients with CCR were studied. The patients had been operated on between July 2005 and July 2009, and their frozen samples of tumoral and normal tissues had been stored in a tissue bank. The expression of the genes TACSTD2, mutant KRAS, Ku70 and SERIN1 was quantified through the technique of real time polymerase chain reaction. RESULTS: The mutant KRAS expression was higher in the tumoral tissue than in the normal tissue (p = 0,024). Although not significant, the tumoral expression of the genes Ku70, TACSTD2 and SERIN1 was respectively lower, equal to, and higher than in the normal tissue. Statistically significant association was also observed between age and mutant KRAS expression in normal tissue and between poorly-differentiated tumors and Ku70 expression in normal tissue. No other statistically significant associations were observed. CONCLUSIONS: Tumoral tissues express mutant KRAS at higher levels than normal tissues in the casuistic of 37 patients with CCR studied through the technique of PCR real time.
Higgins, Geoffrey David. "Human papillomavirus RNA transcripts in anogenital neoplasia /." Title page, contents and outline only, 1991. http://web4.library.adelaide.edu.au/theses/09PH/09phh6358.pdf.
Full textHoghoughi, Neda. "Caractérisation fonctionnelle d'une nouvelle translocation t(3;5)(q21;q31), ciblant le gène du récepteur aux glucocorticoïde et un ARN non-codant, dans la leucémie aigüe à cellules plasmocytoides dendritiques." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV073/document.
Full textBlastic plasmacytoid dendritic cell neoplasm (BPDCN) is an incurable malignancy for which disease mechanisms are unknown. Here, we identify the NR3C1 gene (5q31), encoding the glucocorticoid receptor (GCR), and a long, intergenic, non-coding RNA gene (named here lincRNA-3q), respectively, as targets for genetic alteration or transcriptional deregulation in BPDCN. NR3C1 translocation/deletion was associated to critically short survival in BPDCN and to abnormal activity of GCR, EZH2, and FOXP3 gene regulatory networks. LincRNA-3q, was found to encode a nuclear, non- coding RNA that is ectopically activated in BPDCN and high-risk AML. Depletion of lincRNA-3q in myeloid cancer cells induced cell cycle arrest, coincident to suppression of E2F1/Rb and leukemia stem cell-specific gene expression signatures. BET bromodomain protein inhibition could selectively suppress lincRNA-3q indicating a treatment strategy for counteracting oncogenic activity of this non- coding RNA. Thus, this work defines a new framework for understanding disease pathogenesis and treatment resistance in BPDCN
Faria, André Murad. "Papel do LIN28, uma proteína ligadora de RNAs, na tumorigênese adrenocortical." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/5/5135/tde-26022015-095301/.
Full textINTRODUCTION: Adrenocortical carcinoma is a rare neoplasm with overall poor prognosis. Recently, several studies demonstrated the potential of miRNA profiling in differentiating between adrenocortical adenomas and carcinomas, risk stratification and prognosis. Nevertheless, little is known about posttranscriptional regulation of miRNAs. LIN28 is a highly conserved RNA-binding protein that has emerged as a modulator of the processing of let-7, an important family of miRNAs widely known for its tumor-suppressive effects. Besides from let-7, LIN28 has also shown to regulate and be regulated by mir-9, mir-30 and mir-125. OBJECTIVES: To analyze LIN28 gene and protein expression in a large cohort of adult and pediatric adrenocotical tumors (ACTs), and investigate the copy number variation analysis for LIN28A and LIN28B genes and the expression of LIN28 regulatory microRNAs (let-7 family, mir-9, mir-30 e mir-125) in a subgroup of this cohort. METHODS: LIN28 protein expression was assessed in a total of 266 adult (78 adenomas and 188 carcinomas) and 44 pediatric ACTs (35 clinically benign and 9 clinically malignant). LIN28A and LIN28B gene expression was evaluated in a subgroup of 86 adult and pediatric ACTs and copy number variation analysis of these genes in 58 ACTs. The expression of let-7 family, mir-9, mir-30 and mir-125 was performed in 28 adult carcinomas. RESULTS: In adults, LIN28A gene was overexpressed in aggressive carcinomas when compared with adenomas [7.0 fold change (from 0 to 174.3) vs. 3.6 (from 0 to 18.3); p = 0.006, respectively] and a trend towards greaten expression when compared with non-aggressive carcinomas [7.0 (from 0 to 174.3) vs. 7.1 (from 0 to 17.1); p = 0.092]. LIN28B expression was undetectable in the great majority (92%) of adult ACTs. Surprisingly, weak LIN28 staining was significantly associated with reduced disease-free survival in this population (p = 0.01), but for overall survival only a trend was detectable (p= 0.117). In the multivariate analysis, only Ki67 index >- 10% (HR 5.7, 95% CI 3.0-10.8; p = 0,0001) and weak LIN28 staining (HR 2.3, 95% CI 1.2-4.4; p = 0,008) were independent predictors of recurrence in adult patients. Interestingly, mir-9 expression, a negative LIN28A/B regulator, was significantly higher in aggressive than in non-aggressive ACCs [2076 (from 36 to 9307) vs. 133.4 (from 2.4 to 5193); p = 0.011] and was highly associated with reduced overall survival ( p= 0.01) and disease-free survival (p = 0.01). In the pediatric population, no significant difference was observed in the expression of LIN28 protein and LIN28A and mir-9 gene expression between clinically benign and clinically malignant tumors. Additionally. overexpression of LIN28B was significantly associated with reduced disease-free survival (p = 0.026), but not with overall survival (p = 0.406). Copy number variation analysis showed that only a child with a virilizing benign tumor had LIN28B amplification and a woman with a metastatic adrenocortical carcinoma had LIN28B deletion. No LIN28A copy number variation was detected. A Ki67 >= 20% in children was able to discriminate patient with worse prognosis: there was a significant associtation with reduced overall (p = 0,015) and disease-free survival (p = 0,001) in 36 pediatric ACTs with Weiss >- 3. CONCLUSIONS: Weak LIN28 staining was associated with reduced disease-free survival in a large cohort of adult adrenocortical carcinoma. LIN28A had higher expression in aggressive carcinomas in adults, suggesting there might be negative posttranscriptional regulation of LIN28 protein expression. Interestingly, overexpression of mir-9, a negative LIN28A regulator, predicted poor outcome in adult patients. In addition, LIN28B overexpression was an potential marker of poor prognosis in the pediatric population. A Ki67 index >- 10% in adults and >- 20% in children were associated with poor prognosis
Morin, Ryan David. "Mutation discovery and characterization in lymphoid neoplasms using massively parallel RNA and DNA sequencing." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/40132.
Full textDonlevy, Alison. "Regulation of RNA translation by phenethyl isothiocyanate." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/362491/.
Full textArabi, Azadeh. "Regulation of the ribosomal RNA transcription by c-MYC oncoprotein /." Stockholm, 2006. http://diss.kib.ki.se/2006/91-7140-947-5/.
Full textSample, Klarke Michael. "The identification of non-protein coding RNA in the tumour vasculature." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6696/.
Full textSilva, Camila Leonel da [UNESP]. "Inibição da metástase via transição epitélio-mesenquimal por shRNA, metformina e Y27632 em neoplasia mamária." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138236.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A transição epitélio-mesenquimal (EMT) é o processo pelo qual as células cancerosas a partir de tumores primários passam por uma conversão fenotípica para invadir e migrar, gerar metástases em tecidos ou órgãos distantes. Este processo pode ser induzido por fatores de crescimento, tais como Fator de Crescimento Transformante beta (TGF-β) e sua alta expressão tem sido implicada na angiogênese tumoral, na migração e invasão celular em muitos tipos de tumores. A expressão de ROCK-1 está associada com a malignidade dos tumores, enquanto a inibição desta molécula resulta em uma supressão significativa de metástases tumorais. A metformina, um fármaco utilizado no tratamento da diabetes, demonstrou inicialmente inibir a EMT e impedir o fenótipo mesenquimal pela repressão transcricional de pontos chave da regulação da EMT (ZEB1, TWIST1, SNAIL2, TGF-β) em células de câncer de mama. Os objetivos foram avaliar a expressão gênica e proteica de marcadores relacionados a metástase, em um estudo in vitro e in vivo, em linhagens de câncer de mama, após o tratamento com metformina, além do silenciamento gênico do TGF-β1 para inibição da transição epitélio-mesenquimal. Foi realizado a transfecção da linhagem celular metastática de tumor mamário canino CF41 de forma estável após a construção de um pequeno RNA de interferência para desenvolver derivados clonais que expressam níveis reduzidos de TGF-β1 (células TGF-β1sh). Este foi subsequentemente combinado com o tratamento com metformina, para analisar os efeitos sobre a migração de células, assim como a expressão dos marcadores de EMT E-caderina e N-caderina, quantificados através de imunofluorescência e do qRT-PCR. As linhagens mamárias humanas MCF-7 (não-metastática) e MDA-MB-231 (metastática) foram tratadas com metformina e inibidor Y27632, após a indução da EMT por TGF-β1 para examinar os efeitos sobre a migração destas células, bem como a expressão proteica dos marcadores ROCK-1, vimentina, E-caderina, CD44 e CD24 por imunocitoquímica. Em um estudo in vivo, as células não modificadas CF41 ou que expressam TGF-β1 shRNA foram injetadas na região inguinal de camundongos fêmea nude atímicos tratados com metformina. Os camundongos foram eutanasiados após o tratamento e os pulmões foram recolhidos para avaliação do número de metástases. As regiões metastáticas foram subsequentemente avaliadas pela expressão de N-caderina, E-caderina, vimentina e claudina-7 através da imuno-histoquímica. Foi possível avaliar que a taxa de migração e invasão foi menor em células TGF-β1sh, em comparação com as células parentais CF41 e esta inibição foi significativa quando combinado com o tratamento com metformina. As análises in vitro demonstraram que o tratamento com metformina reduziu a expressão de N-caderina e aumentou a expressão de E-caderina nas células CF41 e TGF-β1sh. Os resultados demonstram também que após a indução do TGF-β1 nas linhagens MCF-7 e MDA-MB-231 houve menor expressão das proteínas ROCK-1, vimentina, CD44 e CD24 em ambas as linhagens após tratamento com metformina e Y27632. Nas células MDA-MB-231 a expressão de E-caderina foi maior em todos os grupos de tratamento. O tratamento da linhagems MDA-MB-231 com metformina e Y27632 reduziu significativamente a invasão destas células. O estudo in vivo demonstrou que o tratamento com metformina reduziu o número de metástases pulmonares em animais portadores de tumores induzidos com as células TGF-β1sh. Houve diminuição da expressão de marcadores mesenquimais N-caderina e vimentina, e aumento da expressão de marcadores epiteliais E-caderina e claudina-7 nas metástases pulmonares. Assim, concluimos que este estudo confirma os benefícios do silenciamento do TGF-β1, além do tratamento com metformina e Y27632 como potenciais agentes terapêuticos em tumores de mama, bloqueando o processo de EMT e seu potencial metastático.
Epithelial mesenchymal transition (EMT) is the process by which cancer cells from primary tumors pass through a phenotypic conversion to invade and migrate, generating metastases in organs or tissues distant. This process can be induced by growth factors such as transforming growth factor beta (TGF-β) and its overexpression has been implicated in tumor angiogenesis, cell migration and invasion in many cancers. ROCK-1 expression is associated with the malignant character of tumors, while inhibiting this molecule results in a significant suppression of tumor metastasis. Metformin, a drug use for the treatment of diabetes, was previously shown to inhibit EMT by suppressing expression of key transcription factors in breast cancer cells. The aims were to evaluate the gene expression and protein expression of related markers metastasis, in a study in vitro and in vivo in breast cancer cell lines after treatment with metformin in addition to the gene silencing of TGF-β1 for inhibiting epithelial-mesenquimal transition. These aims were contemplated performing transfected of canine metastatic mammary tumor cell line CF41 with small interfering RNA constructs to develop clonal derivatives expressing reduced levels of TGF-β1 (TGF-β1sh cells). This was subsequently combined with metformin treatment, to look at effects on cell migration, as well as the expression of the EMT markers E-cadherin and N-cadherin, which were quantified by immunofluorescence and qRT-PCR. MCF-7 and MDA-MB-231 cell lines were treated with metformin and Y27632, after induction of EMT by TGF-β1, to examine the effects on cell migration as well as the protein expression of the ROCK-1 markers, vimentin, E-cadherin, CD44 and CD24 by immunocitochemistry. In an in vivo study, unmodified or TGF-β1 shRNA-expressing CF41 cells were injected in the inguinal region of nude athymic female mice that were treated with metformin. Mice were sacrificed after treatment and the lungs were collected to assess the number of metastases. Metastatic nodules were subsequently assessed for, N-cadherin, E-cadherin, vimentin and claudin-7 expression via immunohistochemistry. With the obtained results it was possible to assess the migration and invasion rate was lower in TGF-β1sh cells as compared to parental CF41 cells and this inhibition was significant when combined with metformin treatment. In vitro analyses demonstrated that metformin treatment reduced n-cadherin expression and increased E-cadherin expression in both CF41 and TGF-β1sh cells. After TGF-β1 induction in MDA-MB231 and MCF-7 cell lines, there was a lower protein expression of ROCK-1, vimentin, CD44 and CD24 in both cell lines after treatment with metformin and Y27632. In MDA-MB-231 cells, E-cadherin expression was increased in all treatment groups. Treatment of MDA-MB-231 cell line with metformin and Y27632 significantly reduced the invasion of these cells. In vivo studies demonstrated that metformin treatment reduced the number of lung metastases in animals bearing TGF-β1sh tumors. This paralleled a decreased expression of mesenchymal markers N-cadherin and vimentin, and increased expression of epithelial markers E-cadherin and claudin-7 in lung metastases.This study confirms the benefits of TGF-β1 silencing in addition to metformin and Y27632 as potential therapeutic agents in mammary tumors, by blocking EMT process and metastatic potential.
FAPESP: 2012/09778-1
Júnior, Nelson Gaspar Dip. "Análise de expressão de micro RNA em carcinoma urotelial de bexiga." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-10102012-100047/.
Full textIntroduction: Bladder cancer (BC) is the second most common malignancy of the urinary tract, with 386,000 cases estimated and 150,000 deaths in 2011. Urothelial carcinomas (UC) represent 95% of BC cases, and knowledge of the molecular pathways associated with BC carcinogenesis is crucial to identify new diagnostic and prognostic biomarkers, and development of new target molecular therapies. MicroRNAs (miRNAs) are short non-coding RNA molecules that play important roles in the regulation of gene expression by acting directly on mRNAs, leading to either mRNA degradation or inhibition of translation, involved in many physiological and pathological processes, including cancer. Objectives: To characterize miRNAs expression profiles in UC, associating with classic prognostic factors: grade and stage. Moreover, correlate miRNA expression with tumor recurrence and survival. Material and Methods: Fourteen miRNAs (miR-100, miR-10a, miR-21, miR-205, miR-let7c, miR-125b, miR-143, miR-145, miR-221, miR-223, miR-15a, miR-16-1, miR- 199a e miR-452) were isolated from surgical specimens from 60 patients classified in two groups: 30 patients with low-grade non-invasive pTa UC that underwent TURB, 30 with high-grade invasive pT2/pT3 UC underwent radical cystectomy. The control group consists in five normal bladder tissue taken from patients that underwent retropubic prostatectomy to treat benign prostatic hyperplasia (BPH). miRNA processing involved three phases: (1) miRNA extraction by specific kits, (2) cDNA generation (3) miRNA amplification through qRT-PCR. Expression profiles were obtained by relative quantification determined by 2-ct method. Endogenous control were RNU-43 and RNU-48. Statistic tests were used to study the prognostic variables and Kaplan-Meyer curves were constructed to analyze disease-free (DFS) and disease-specific (DSS) survivals. Results: All miRNAs were underexpressed in both groups, except miR-10a in pTa and miR-100, 21 and 205 in pT2/pT3 tumors, that where over-expressed. miR-100, miR-21, miR-10a and miR-205 differentialy expressed in both groups and this differences were statistically significant. The Kaplan-Meyer survival curves showed that higher levels of miR-21 were related to shorter DFS for pTa group. Also, higher levels of miR-10a and miR-145 were associated with shorter DFS and higher levels of miR-10a were also related to shorter DSS in pT2/pT3 group. Conclusions: The majority of miRNA were shown to be underexpressed in bladder UC. miR-100, miR-10a, miR-21 and miR-205 were differentially expressed considering tumor grade and stage. The miRNA profile was able to distinguish pTa low grade and pT2-3 high grade tumors. Higher levels of miR- 21 were related to shorter DFS in pTa, while higher levels of miR-10a were associated with shorter DFS and DSS in pT2-3, high grade UC
Mangone, Flavia Regina Rotea. ""Determinação do perfil de expressão dos RNAs mensageiros da família das Smads e dos componentes do complexo AP-1 em carcinoma de célula escamosa de cabeça e pescoço"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/5/5155/tde-10082005-153351/.
Full textSmad and AP1 messenger RNA expression may underlie disruptions affecting TGFb signaling in head and neck squamous cell carcinoma (HNSCC). Analysis of Smads1-8 mRNA expression by RPA has shown Smad expression is globally increased in tumor as compared to adjacent normal tissue. Kaplan Meier survival curves and multivariate analysis revealed that Smad6 positivity in tumor was an independent good prognostic factor in HNSCC. In relation to AP-1, as measured by Northern blot, only Fra-1 was overexpressed in tumor and directly related to the presence of lymph node involvement. Our data suggest that Smad6 may be a marker of good prognosis in HNSCC
Enberg, Ulla. "Functional and diagnostic aspects on adrenocortical adenoma /." Stockholm, 2007. http://diss.kib.ki.se/2007/978-91-7357-150-0/.
Full textThiele, Benjamin [Verfasser], and Mascha [Akademischer Betreuer] Binder. "RNA based deep sequencing of the B-cell receptor for detection and monitoring of B-cell neoplasms / Benjamin Thiele ; Betreuer: Mascha Binder." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2017. http://d-nb.info/1133262163/34.
Full textEskandarpour, Malihe. "Molecular genetics of cutaneous malignant melanoma /." Stockholm : Karolinska institutet, 2007. http://diss.kib.ki.se/2007/978-91-7357-277-4/.
Full textThakur, Noopur. "Long-range Control of Gene Expression by Imprinting Control Regions During Development and Neoplasia." Doctoral thesis, Uppsala universitet, Zoologisk utvecklingsbiologi, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5725.
Full textHunter, Rebecca Stephanie. "Inhibition of ErbB2 and Thymidylate Synthase by a Multi-Targeted Small-Interfering RNA in Human Breast Cancer Cell Lines." Yale University, 2008. http://ymtdl.med.yale.edu/theses/available/etd-08092007-140112/.
Full textVladimir, Stojšić. "Učestalost i prognostički značaj genskih alteracija u tumorskim ćelijama i njihova povezanost sa kliničko-patološkim karakteristikama bolesnika sa ranim stadijumom adenokarcinoma bronha." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=105379&source=NDLTD&language=en.
Full textAdvances in the field of molecular biology gave us insight into biomarkers for lung cancer with great prognostic and predictive value and their role in advanced stage disease is well known while in early stage disease is yet to be proven. The aim of this study was to determine the frequencies of the most common gene alterations in patients with early stage lung adenocarcinoma, to determine the relationship between gene alterations in tumor cells and clinicopathologial characteristics and to determine prognostic value of each gene alteration regarding overall survival and disease free survival. One hundred sixty-one patients diagnosed with lung adenocarcinoma clinical stage I-IIIA who underwent radical surgical resection at the Institute for Pulmonary Diseases of Vojvodina between 2007 and 2014 were included in this study. Mutations in EGFR, KRAS and PIK3CA gene, ALK and ROS1 rearrangement and PD-1 and PD-L1 expression were determined in representative formalin-fixed, paraffin-embedded (FFPE) tumor block from each patient. Clinical data were extracted from the institutional lung cancer registry of the Institute for Pulmonary Diseases. Overall survival was calculated as time from the day of surgery to the day of death. Disease free survival was calculated as time from the day of surgery to the day of disease relapse. Among 161 tested tumor tissue, presence of mutation was found in 96 (59.6%) of them. There were 69 (42.9%) mutations in KRAS gene, 10 (6.2%) in EGFR gene and 7 (4.3%) in PIK3CA gene. ALK and ROS1 rearrangement were present in 3 (1.9%) and 7 (4.3%), respectively. PD-1 expression was determined in 71 (45.0%) tumor sample while PD-L1 expression was determined in 59 (36.6%). PD-1 expression was not correlated with any of the clinicopathologial characteristics (including KRAS, EGFR, ALK, ROS1 and PIK3CA mutational status). PD-L1 expression correlated with type of surgery (P = 0.01) and KRAS positivity (P = 0.02). KRAS mutation status correlated with age (P = 0.004), sex (P = 0.006) and smoking status (P = 0.004). EGFR status correlated with smoking status (P < 0.001) and age (P = 0.013). ALK, ROS1 and PIK3CA status were not correlated with any of the clinicopathologial characteristics. PD-1expression was significantly associated with disease free survival (P = 0.03) and overall survival (P = 0.01). PD-L1 expression, KRAS, EGFR, ALK, ROS1 and PIK3CA status were not associated with disease free survival and overall survival. The most frequent gene alteration are mutations in KRAS and EGFR gene. Presence of KRAS mutation is in correlation with patients age, sex and smoking status while presence of EGFR mutation is in correlation with patients age and smoking status. PD-L1 expression is in correlation with type of surgery and KRAS mutational status. Only presence of PD-1 expression represent an independent prognostic factor for disease free survival and overall survival.
Vaarala, M. (Markku). "Differential gene expression in prostate cancer:identification of genes expressed in prostate cancer, androgen-dependent and androgen-independent LNCaP cell lines, and characterization of TMPRSS2 expression." Doctoral thesis, University of Oulu, 2000. http://urn.fi/urn:isbn:9514258304.
Full textCarvalho, Michelle Garcia Discacciati de. "Valor preditivo da avaliação do DNA e da expressão dos genes E6/E7 do papilomavírus humano na evolução da neoplasia intraepitelial cervical de grau 2." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310571.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: A avaliação das taxas de evolução da NIC 2 e a identificação de aspectos clínicos e marcadores preditivos de regressão desta lesão podem identificar as mulheres que se beneficiariam de uma conduta expectante e seguimento periódico. Objetivo: Avaliar alguns fatores clínicos e moleculares associados à progressão e regressão da NIC 2, em mulheres submetidas à conduta expectante. Sujeitos e Métodos: O estudo foi do tipo coorte e incluiu 50 mulheres com diagnóstico de NIC 2 confirmado por biópsia, após serem referenciadas ao Centro de Atenção Integral à Saúde da Mulher (CAISM), Universidade Estadual de Campinas (UNICAMP), por apresentaram exame citopatológico mostrando lesão intraepitelial escamosa de baixo grau (LIEBG). Estas mulheres foram acompanhadas por 12 meses, com consultas trimestrais para avaliação citológica e colposcópica. Na admissão, foram coletadas amostras para a realização de testes de genotipagem de HPV, os quais foram realizados no Instituto Ludwig de Pesquisa Sobre o Câncer; e também para testes de detecção de RNA mensageiro dos genes E6/E7 dos HPV tipos 16,18,31,33 e 45, realizados no Laboratório Salomão & Zoppi. Os resultados deste estudo estão sendo apresentados em dois artigos. O primeiro avaliou a frequência de progressão, persistência e regressão da NIC2, como também testou se a idade da mulher no diagnóstico e idade ao início da atividade sexual variaram com a evolução da lesão. O segundo artigo avaliou a associação dos tipos e espécies de HPV e da expressão dos genes virais E6 e E7 com a evolução de NIC 2. Resultados: Ao final de 12 meses houve 74% de regressão, 24% de progressão de NIC 2 para NIC 3, e um caso de persistência da NIC 2. A maioria dos casos regrediu nos primeiros seis meses de seguimento. Não foi observada associação entre a evolução de NIC 2 e a idade ou início da atividade sexual em mulheres submetidas à conduta expectante. As taxas de regressão da NIC 2 aos 12 meses de seguimento, para mulheres com HPV da espécie alfa-9, comparada com outras espécies ou HPV negativo foram 69,4 e 91,7% respectivamente, sendo que esta diferença foi estatisticamente significativa ao longo do seguimento. A taxa de regressão de NIC 2 aos 12 meses foi de 68,3% para mulheres com teste positivo para RNA mensageiro de E6/E7 e 82,6% para mulheres com teste negativo para este marcador, mas esta diferença não foi estatisticamente significativa. Conclusão: A maioria da NIC 2 diagnosticada por biópsia em mulheres selecionadas por exame citológico com diagnóstico de lesão LIBG regride em até 12 meses. Mulheres infectadas por tipos de HPV da espécie alfa-9, especialmente o HPV 16, são menos propensas a ter regressão da NIC 2 ao final de 12 meses de seguimento. Os resultados não demonstraram associação entre a expressão de genes virais E6/E7 com a regressão ou progressão da NIC 2
Abstract: The evaluation of CIN 2 outcome rates and identification of clinical features and predictive markers of the lesion regression can identify women who would benefit from an expectant management and regular monitoring. Objective: To evaluate the clinical and molecular factors associated with progression and regression of CIN 2 in women undergoing expectant management. Subjects and Methods: This cohort study included 50 women with diagnosis of CIN 2 confirmed by biopsy after being referenced to the Center of Integral Attention to Women's Health, State University of Campinas, with Pap smear showing low-grade lesion (LSIL). These women were followed for 12 months with three-monthly controls visits for cytological and colposcopic evaluation. On admission, samples were collected to perform HPV genotyping, which was held at the Ludwig Institute and also for the detection of E6/E7 mRNA, which was performed in the laboratory Salomão & Zoppi. The results of this study are presented in two articles. The first assessed the frequency of progression, persistence and regression of CIN2, comparing these rates with clinical factors such as woman's age and age at first sexual intercourse. The second evaluated the association between CIN 2 evolution with the HPV species and expression of viral genes E6 and E7. Results: At the end of the 12 months of monitoring, there was 74% of regression, 24% of progression to CIN 3 and only one case of persistence of CIN 2. The most of the CIN 2 regresses during the first six months of follow-up. However, there was no statistically significant association between the women' age and the age at first sexual intercourse. The rate of CIN 2 regression at 12 months follow-up for women with HPV alpha- 9 compared with another HPV species groups or HPV negative were respectively 69,4% and 91,7%, and the difference up to 12-month follow-up was statistically significant. The CIN 2 regression rate at 12-month follow-up for women with positive E6/E7 mRNA was 68.3%, and for negative was 82.6%, but the difference up to 12-month follow-up was not statistically significant. Conclusion: The majority of CIN 2 diagnosed by biopsy in women with previous cervcial smear showing LSIL regresses after 12 months. Women infected with HPV alpha-9, which includes HPV 16, are less likely to have CIN 2 regression over 12 months of follow-up. The results showed no association between the expression of viral genes E6 and E7 with the regression or progression of CIN 2
Doutorado
Ciencias Biomedicas
Doutor em Tocoginecologia
Xing, Yigong P. "Nuclear Structure Studied by Fluorescence Hybridization: Visualization of Individual Gene Transcription and RNA Splicing: A Thesis." eScholarship@UMMS, 1993. https://escholarship.umassmed.edu/gsbs_diss/48.
Full textBewry, Nadine N. "STAT3 Contributes to Resistance Towards BCR-ABL Inhibitors in a Bone Marrow Microenvironment Model of Drug Resistance in Chronic Myeloid Leukemia Cells." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002892.
Full textBajak, Edyta Zofia. "Genotoxic stress: novel biomarkers and detection methods : uncovering RNAs role in epigenetics of carcinogenesis /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-415-5/.
Full textGoulart, Ana Emília. "Impactos do silenciamento do RNA não codificante PCA3 em células de câncer de próstata." reponame:Repositório Institucional da FIOCRUZ, 2014. https://www.arca.fiocruz.br/handle/icict/13674.
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Fundação Oswaldo Cruz. Instituto Tecnológico em Imunobiológicos. Rio de Janeiro, RJ, Brasil.
Introdução: O PCA3 é um RNA não codificante (ncRNA), expresso especificamente na próstata, estando envolvido no controle da sobrevivência de células de carcinoma de próstata (CaP), através da via de sinalização do receptor de androgênio (AR). Objetivo: Investigar se diversos genes relacionados ao câncer – incluindo os envolvidos na Transição Epitelial Mesenquimal (EMT), os que apresentam potencial stemness e os co-reguladores do AR – podem estar envolvidos no processo de resposta ao silenciamento do PCA3. Além disso, objetivamos promover o silenciamento estável do PCA3 através da construção de um vetor lentiviral carreando short hairpin RNA (shRNA) específico para este ncRNA, vislumbrando estratégias terapêuticas para o CaP. Metodologia: Empregamos small interfering RNA (siRNA) ou shRNA com expressão baseada em vetores lentivirais para diminuir a expressão de PCA3 em células LNCaP e avaliar os efeitos deste silenciamento na sobrevivência destas células. Para isto, analisamos por qRT-PCR a expressão do PCA3 e de diversos genes relacionados ao câncer. Utilizamos microscopia confocal para analisar a expressão da proteína vimentina. Empregamos citometria de fluxo para verificar o percentual de células LNCaP GFP+ e, azul de tripan para avaliar o número de células viáveis, após o silenciamento estável do PCA3. Resultados: Dentre os co-reguladores do AR, ARA 70, ARA 54, Smad3 e EBP1 apresentaram expressão aumentada nas células LNCaP interferidas com siPCA3 em relação às células LNCaP interferidas com siScrbl, enquanto Smad 4 e ciclina D1 apresentaram expressão diminuída. Dentre 84 genes relacionados ao câncer, 16 apresentaram expressão alterada em células LNCaP- siPCA3 em relação ao controle. Destes, 30% codificam moléculas de transdução de sinais e fatores de transcrição. Observou-se expressão aumentada de E-caderina, Claudina-3, Citoqueratina-18, Snail, Twist e Slug em células LNCaP -siPCA3 em relação ao controle, enquanto observou-se expressão diminuída de Claudina-4, Citoqueratina-8 e Vimentina. O padrão de marcação de vimentina foi similar em células LNCaP – siPCA3 e células LNCaP – siScrbl. Não foi detectada a expressão de genes com potencial stemness nas condições testadas. Células transduzidas com vetores lentivirais carreando shPCA3 apresentaram diminuição estável da expressão do PCA3. Foi observada redução estável de cerca de 60% de células LNCaP GFP+ transduzidas com shPCA3, além de redução no número de células viáveis. Conclusão: O silenciamento do PCA3 reduz o número de células viáveis, através de um processo que envolve moléculas de transdução de sinais e fatores de transcrição que podem orquestrar a sobrevivência das células de CaP. A diminuição no número de células viáveis após a transfecção com siPCA3 parece não ser modulada pelo programa EMT clássico, embora a reversão parcial deste programa possa estar regulando a diminuição da sobrevivência celular induzida por siPCA3. A desregulação da expressão de coreguladores do AR observada pode estar envolvida na inibição da expressão dos genes alvo do AR. Nossos dados sugerem que este ncRNA desempenha papel regulador na transcrição gênica, sendo capaz de modular a expressão de genes de diversas vias de sinalização relacionadas ao câncer. Nossos resultados sugerem ainda que a redução estável do PCA3 apresenta potencial aplicação em estratégia terapêuticas que visem modular negativamente a sobrevivência das células de CaP.
Introduction: PCA3 is a prostate specific non coding RNA (ncRNA), involved in the control of prostate cancer (PCa) cell survival, through modulating androgen receptor (AR) signaling. Objective: In order to better characterize the molecular mechanisms by which PCA3 is controlling LNCaP cell survival, we aimed to investigate whether several cancer related genes, including those involved in epithelial-mesenchymal transition (EMT), stemness potential and AR co-regulators could be involved in this process in response to PCA3 downregulation. Moreover, we aimed to promote PCA3 stable silencing through a lentiviral vector containing a PCA3 short hairpin RNA (shRNA) specific sequence. Methodology: We used small interfering RNA (siRNA) or lentivirus vectorbased shRNA to downregulate PCA3 expression and evaluate the effects of this ncRNA knockdown on LNCaP cell survival. After PCA3 downregulation, cells were analyzed by qRT-PCR to investigate PCA3 and several cancer related genes expression. Confocal microscopy was performed to analyze vimentin expression. Flow cytometry was performed to analyze the percentage of LNCaP GFP positive cells and trypan blue staining to analyse the number of viable cells after PCA3 stable silencing. Results: Among AR co-regulators genes investigated, ARA70, ARA54, Smad 3 and EBP1 were upregulated in siPCA3- transfected cells in relation to scramble sequence LNCaP transfected cells, while Smad 4 and cyclin D1 were downregulated. We found that among 84 cancer-related genes tested, 16 were differentially expressed in LNCaP siPCA3-transfected cells when compared to transfected cells with a scramble sequence. Of these, 30% are genes coding for signal transduction molecules and transcription factors. Gene expression profile of EMT-related genes revealed that E-cadherin, Claudin-3, Cytokeratin-18, Snail, Twist and Slug are upregulated in LNCaP siPCA3-transfected cells compared to control, while Claudin-4, Cytokeratin-8 and Vimentin are downregulated. Vimentin expression staining patterns were similar between LNCaP siPCA3-transfect cells and control. Expression of stemness markers were not detected in these tested conditions. LNCaP cells transduced with lentiviral vectors carrying the GFP gene and shPCA3 stably dowregulated PCA3 expression, producing a reduction of 60% of LNCaP GFP+ cells compared to shScrbl transduced or non-transduced LNCaP cells. In addition, the number of viable cells was reduced after PCA3 stable silencing. Conclusion: PCA3 downregulation by RNAi leads to a loss of viability, through a process that involves key signal transduction molecules and transcription factors that could orchestrate PCa cells survival. Our results also suggested that the decrease in the number of LNCaP viable cells, observed after siPCA3 transfection, seems to don´t be modulated by the classical EMT program, although a partial reversion of this program could regulate the reduction of cell survival induced by siPCA3. Observed deregulated expression of AR co-regulators could be involved in the inhibition of the AR target genes expression. Our data suggest that that this ncRNA perform a regulatory role in gene expression, being able to modulate gene expression of several signaling pathways related to cancer. Moreover, our results suggest that the stable downregulation of PCA3 expression shows potential as a PCa therapeutic approach by negatively modulation cell survival.
Watte, Marina. "Acompanhamento nutricional de mulheres com neoplasia mam?ria em tratamento quimioter?pico em um hospital universit?rio." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2011. http://tede2.pucrs.br/tede2/handle/tede/1602.
Full textINTRODU??O: O c?ncer de mama ? a malignidade mais comum em mulheres no mundo e ? o segundo tipo de c?ncer que mais atinge a popula??o brasileira. Mulheres com c?ncer de mama em tratamento quimioter?pico adjuvante apresentam uma tend?ncia progressiva ao ganho de peso. Este aumento ponderal pode levar ao risco aumentado de recorr?ncia da neoplasia, e de desenvolvimento de doen?as cr?nicas relacionadas ? obesidade, como a doen?a cardiovascular e a diabetes.OBJETIVO: Avaliar a modifica??o do estado nutricional de mulheres com diagn?stico de neoplasia mam?ria durante o tratamento quimioter?pico adjuvante com poliquimioterapia em um hospital universit?rio.MATERIAL E M?TODOS: Trata-se de um estudo de coorte prospectivo. A popula??o estudada foi composta por 45 pacientes em tratamento quimioter?pico adjuvante na Unidade de Quimioterapia do Hospital S?o Lucas PUC/RS. As pacientes foram avaliadas no per?odo inicial e final do tratamento atrav?s de duas entrevistas estruturadas, onde foram verificados dados de identifica??o das pacientes, aferidos peso e altura e aplicado um inqu?rito recordat?rio de 24h, visando avaliar a ingest?o alimentar das pacientes. Os dados categ?ricos foram expressos por contagens e percentuais. A an?lise univariada foi conduzida por teste t de Student (dados quantitativos) e exato de Fisher (dados categ?ricos). O n?vel de signific?ncia adotado foi de =0,05.RESULTADOS E CONCLUS?O: As pacientes estudadas aumentaram o peso durante o tratamento quimioter?pico, com diferen?a significativa entre o peso inicial e final do per?odo (p<0,016). Este aumento de peso consequentemente refletiu no aumento do ?ndice de massa corporal (p<0,018). Quanto ? classifica??o do estado nutricional, as modifica??es observadas n?o foram expressivas. Em rela??o ? ingest?o alimentar, observou-se aumento com signific?ncia estat?stica ao longo do per?odo estudado, mas os valores de ingest?o permaneceram dentro das recomenda??es nutricionais.
Matsumoto, Yoshiaki. "SALL4 - KHDRBS3 network enhances stemness by modulating CD44 splicing in basal-like breast cancer." Kyoto University, 2018. http://hdl.handle.net/2433/232117.
Full textGadd, Samantha. "Acetaminophen-induced proliferation of estrogen-responsive breast cancer cells is associated with increased c-mcy RNA expression and NF-kB activity." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2016.
Full textTitle from document title page. Document formatted into pages; contains xi, 147 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 128-143).
Tomiyama, Alberto Hiroyuki. "Micro RNA em adenocarcinoma de próstata: caracterização da expressão em tumores de baixo grau, órgão-confinados." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5153/tde-07022012-112055/.
Full textIntroduction: micro RNA (miRNA) are formed from double-stranded RNA precursors that contain between 60-110 nucleotides and form structures such as hairpin. Immediately after their transcription by RNA polymerase II, the enzyme Dicer promotes the cleavage of precursor RNA sequences containing minor 19-22 nucleotides. After cleavage, the miRNA is part of the RNA-induced silencing complex (RISC) that leads to its messenger RNA (mRNA) newly transcribed counterpart. This association promotes the degradation of mRNA, or interferes with the protein translation characterizing a great mechanism for controlling gene expression. This mechanism is related to the development of organs and tissues, and may be involved in the process of carcinogenesis. Our goal is to identify a miRNA expression profile that distinguishes prostate adenocarcinoma of favorable and unfavorable prognosis considering the PSA and pathological findings. Material and Methods: We studied 53 patients with tumors considered unfavorable (Median of Gleason score 8, 79.2% staged pT3, median of PSA 10.1 ng/mL and median of tumor volume of 23%) and 45 considered favorable (Median of Gleason score 5, 80% staged pT2, median of PSA 7.8 ng/mL and median of tumor volume of 11.5%). The control group was represented by seven patients with benign prostatic hyperplasia (BPH). All patients underwent radical prostatectomy by the same surgeon. The surgical specimen was examined entirely by the same pathologist. The analysis of miRNA was made from frozen and paraffin embedded tissue by quantitative real-time polymerase chain reaction (qRT-PCR) using the Taqman® specific primers and probes. The RNU43 was used as a internal control. Results: Except for miRNAs 199a, 21, 15a, 16 e 25 that were underexpressed by both favorable and unfavorable prostate cancer, there was a global decrease of all miRNAs studied, and some differences were statistically significant as miRNAs 143, 145 e 146a, 191, 218 e Let7c that were underexpressed in unfavorable carcinomas compared favorable tumor. Conclusion: We have demonstrated that in the process of transition between favorable and unfavorable prostate cancer there is a global loss of expression of miRNAs. These molecules can be important controllers of a series of genes related to cancer progression. Experimental studies are needed in order to comprehend the role of these genes in prostate carcinogenesis
Smith, Nikki. "The role of cellular micro-RNAs in Epstein-Barr virus induced cellular transformation and oncogenesis." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1344/.
Full textCornhill, Zoe. "An RNAi-mediated genetic screen identifies genes that promote tumour progression in a living epithelium." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39515/.
Full textSilva, Marta Batista da. "Trajet?ria de vida de mulheres mastectomizadas integrantes de um grupo de auto ajuda a luz da Hist?ria Oral." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14801.
Full textCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Introdu??o: Uma quest?o de grande relev?ncia para a sa?de p?blica refere-se ao c?ncer de mama, considerado o respons?vel pela maior causa de morte na popula??o feminina no mundo, inclusive no Brasil. O c?ncer de mama, dentre as neoplasias malignas, tem sido o respons?vel pelos maiores ?ndices de mortalidade tornando-se uma das grandes preocupa??es no que diz respeito ? sa?de da mulher. Apesar de ser considerado um c?ncer de relativamente bom progn?stico, se diagnosticado e tratado oportunamente, as taxas de mortalidade por c?ncer de mama continuam elevadas no Brasil, muito provavelmente porque a doen?a, ainda seja diagnosticada em est?gios avan?ados. Diante deste contexto, questiona-se: Quais as mudan?as ocorridas na vida cotidiana, da mulher ap?s diagnostico de c?ncer de mama? Objetivo: Analisar a trajet?ria de vida de mulheres mastectomizadas integrantes do grupo Despertar da Liga Norte Riograndense do C?ncer/RN. M?todos e T?cnicas: Utilizou-se do enfoque da hist?ria oral de vida como referencial metodol?gico. Participaram como colaboradoras 20 mulheres integrantes do Grupo Despertar vinculado ? Liga Norte-Riograndense Contra o C?ncer, Natal/RN. Aprovado pelo Comit? de ?tica em Pesquisa da Liga Norte Rio Grandense Contra o C?ncer, Protocolo n. 150/2011. Resultados: Discute-se a problem?tica em forma de manuscritos, inicialmente, a partir da compreens?o de Mulheres com c?ncer de mama submetidas ? quimioterapia: assist?ncia de enfermagem atrav?s de uma an?lise contextual ; seguido dos Sentimentos e expectativas de mulheres com diagn?stico de c?ncer de mama: uma reflex?o ; e finalmente, da Trajet?ria de vida de mulheres mastectomizadas integrantes de um grupo de auto-ajuda a luz do Discurso do Sujeito Coletivo (DSC) e suas etapas: express?es-chaves, ideias centrais, discurso do sujeito coletivo. Emergiram tr?s eixos tem?ticos, sustentado por suas respectivas ideias centrais, cada um referente, ao antes, durante e o depois da mastectomia: "encarar a vida de frente - "vida normal", separa??o", "mudan?a", "trabalho" e "filhos"; "falei com Deus" - preven??o/cuidados , diagn?stico/tratamento , sentimentos/emo??es e mudan?as ; "reorganiza??o com mais objetividade e experi?ncia - "cren?a , mudan?a e sentimentos/emo??es . Considera??es Finais: Reconhecem-se o alcance do objetivo proposto e das lacunas do trabalho, embora, n?o o torna menos relevante do ponto de vista cient?fico e da oralidade express?o pelas colaboradoras do estudo, al?m do sentido atribu?do a vida depois da mastectomia. Ressalta-se a necessidade, de estudos sobre grupos de auto-ajuda voltados para as mulheres mastectomizadas e maior divulga??o dos resultados, para subsidiar pol?ticas p?blicas, ou simplesmente, capacitar os profissionais da sa?de para um atendimento humanizado e incentivar novos grupos
Rudge, Felicity. "Genome-wide cDNA and RNAi screening to identify modulators of responses to a novel Wnt signalling inhibitor." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/58589/.
Full textCALVO, FERNANDA B. "Construcao e caracterizacao in vitro de um vetor retroviral bicistronico codificando endostatina e interleucina-2 para utilizacao em terapia genica." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9487.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Geraldo, Murilo Vieira. "Regulação da via de sinalização de TGF-b pelo microRNA miR- 146b-5p no câncer de tiróide." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/42/42134/tde-19032012-154046/.
Full textMicroRNAs are small non-coding RNAs involved in post-transcriptional gene regulation. Large-scale analyses revealed that miR-146b-5p is overexpressed in papillary carcinomas (PTC), the most prevalent form of thyroid cancer. A computational analysis indicated SMAD4, an important member of the TGF-b signaling pathway, as a putative target of miR-146b-5p. The TGFbeta pathway is a negative regulator of thyroid follicular cell growth, and the mechanism by which thyroid cancer cells evade its inhibitory signal remains unclear. The overexpression of miR-146b-5p in normal follicular PCCL3 cells decreased SMAD4 levels, conferred resistance to TGFbeta anti-proliferative signal and increased cell proliferation. The specific inhibition of miR-146b-5p in papillary carcinoma cell lines significantly increased SMAD4 levels, restored the TGFbeta signal transduction and decreased cell growth. Altogether, our data confirm the oncogenic role of miR-146b-5p in thyroid follicular cells as a negative regulator of TGFbeta signaling pathway.
Sodré, Ana Karina de Melo Bezerra. "Expressão do simportador sódio-iodo (NIS) nos tumores tireoidianos benignos e malignos através de estudo imunohistoquímico e da quantificação do RNA mensageiro." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/5/5135/tde-17042007-084559/.
Full textThe iodide uptake by epithelial thyroid cells requires the expression of sodium iodide symporter (NIS), a transmembrane glycoprotein of 643 amino acids. NIS is located at basolateral plasma membrane of the thyroid follicular cells and couples the transport of iodide and sodium to this cells. NIS gene was cloned in 1996, being the first step of investigation of the mechanisms responsible for the lower uptake of radioiodide by benign and malignant thyroid tumors. Previous studies about expression of NIS gene based in quantification by RT-PCR and/or immunohistochemistry analysis showed divergent data. The majority of RT-PCR studies showed reduction or even absence of transcript of NIS in malignant tumors. Recent studies of immunostaining showed that many tumors overexpress rather than under express NIS. Only a few studies have made the analysis of the transcript and the protein at the same time in the same samples. The objective of this study was to investigate NIS transcript levels and the presence and location of NIS protein, using real time RT-PCR and immunohistochemistry, respectively. It was included 30 samples of thyroid tumors, 14 benign and 16 malignant ones, always compared to adjacent non-tumoral samples. Scintigraphic findings showed that 100% of malignant tumors and 87.5% of benign ones were ?cold?. RT-PCR data revealed lower gene expression in 78.6% of the benign tumors, 81.2% of the carcinomas using PSMC6 as a housekeeping gene and 100% of the carcinomas using GHPDH as a housekeeping gene, when paired to the normal tissue samples. Immunohistochemical staining revealed presence of NIS protein in 100% of the nontumoral samples, 100% of the benign tumors and 93.75% of the malignant tumors. No statistical differences were detect in this data. NIS protein was identified at basolateral membrane in 23.3% of non-tumoral samples, 14.3% of benign tumors and 12.5% of malignant tumors. No statistical differences were detect in this data. Higher quantities of intracytoplasmatic NIS protein were detect in 64.3% of benign tumors and in 87.5% of malignant tumors when compared to non-tumoral samples. Association between lower gene expression and higher presence of intracytoplasmatic NIS protein was found in 50% of benign tumors, 87.5% of malignant tumors using GHPDH as a housekeeping gene and 68.75% of malignant tumors using PSMC6 as a housekeeping gene. The reduced gene expression of NIS in thyroid tumors with strong intracytoplasmatic staining may be due to his incapacity in migrating to cellular membrane.
Ara?jo, Priscilla Cristhina Bezerra de. "Percep??o de estigma e qualidade de vida em crian?as com neoplasia." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17524.
Full textConselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
The increase in survival time and cure requires more extensive care about the quality of life of cancer patients, which begins soon after diagnosis. Thus, it seems reasonable to the emphasis on development of studies covering the psychosocial variables, such as stigma, treatment of childhood cancer aiming thereby to the attention of the overall needs of the child. Thus, this research aims to investigate the perception of stigma and quality of life in children with cancer. This is a cross-sectional research and understanding of the descriptive type, the type specimen being adopted for convenience. This consisted of thirty children with cancer and thirty children without chronic disease. The instruments used were the Quality of Life Questionnaire, the Perceived Stigma Scale and Technical Drawing Story with a Theme. The results indicate that the chronic condition, no interfered significantly in satisfaction with the quality of life in children with cancer and identified that the quality of life is not related to the stigma. Comparison with children with no chronic disease with infants with cancer, no significant differences were observed. However, the group mean contrast was lower, suggesting a greater impairment in quality of life of children with cancer compared to those without chronic disease. It is worth noting that the psychosocial effects and the limitations imposed by disease and treatment are presented as important factors in the design mode of subjective manifestations of children with cancer. Therefore, it is expected that knowledge elucidated by this study will assist, greatly to the promotion of improved emotional, biological and social development itself and the involvement of children with cancer treatment
O aumento do tempo de sobrevida e cura exige cuidados mais amplos em rela??o ? qualidade de vida dos pacientes com c?ncer, que tem inicio logo ap?s o diagn?stico. Deste modo, parece acertado a ?nfase dada ao desenvolvimento de estudos que abranjam as vari?veis psicossociais, como o estigma, no tratamento do c?ncer infantil visando assim ? aten??o das necessidades globais da crian?a. Destarte, esta pesquisa se prop?s a investigar a percep??o de estigma e a qualidade de vida em crian?as com neoplasia. Trata-se de uma pesquisa de corte transversal do tipo descritiva e compreensiva, sendo adotado o tipo amostra por conveni?ncia. Esta foi constitu?da por trinta crian?as com c?ncer e trinta crian?as sem doen?a cr?nica. Os instrumentos utilizados foram o Question?rio de Qualidade de Vida, a Escala de Percep??o de Estigma e a t?cnica de Desenho Est?ria com Tema. Os resultados apontam que a condi??o cr?nica n?o interferiu de modo significativo na satisfa??o com a qualidade de vida nas crian?as com neoplasia e identificou-se que a qualidade de vida n?o est? relacionada com o estigma. Quanto ? compara??o de crian?as sem doen?a cr?nica com os infantes com neoplasia, n?o foram observadas diferen?as significativas. Contudo a m?dia do grupo contraste apresentou-se menor, sugerindo um maior preju?zo na qualidade de vida das crian?as com c?ncer em rela??o ?s sem doen?a cr?nica. Ressaltase ainda que as repercuss?es psicossociais e as limita??es impostas pela doen?a e pelo tratamento se apresentam como fatores importantes no modo de estrutura??o das manifesta??es subjetivas das crian?as com c?ncer. Assim sendo, espera-se que o conhecimento elucidado por este estudo venha a colaborar, sobremaneira, para a promo??o da melhora emocional, biol?gica e social e do pr?prio desenvolvimento e envolvimento das crian?as com c?ncer no seu tratamento
Paquin, André. "Transfection of the breast cancer cell line MDA-468 with antisense RNA to P21 CIP1 in order to investigate the mechanism of EGF-mediated G1 arrest in these cells /." St. John's, NF : [s.n.], 2000.
Find full textOgba, Ndiya. "Transcriptional Regulation Of Estrogen Receptor Alpha Target Genes By Hexamethylene Bisacetamide-Inducible Gene 1 (HEXIM1) And Its Role In Mammary Gland Development And Breast Cancer." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1258406511.
Full textFaustino, Viviane Dias. "Inibição simultânea dos genes antiapoptóticos Bcl-2 e Bcl-XL em células de leucemia linfoide aguda e células de linfoma do manto mediante RNA de interferência." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/5/5167/tde-22012013-154327/.
Full textThe hematological cancer statistics indicates that its incidence and mortality have increased over the years. Although most cases of lymphomas and leukemias has no definite etiology however is suggested that genetic factors may be involved. In this context there is the Bcl-2 proteins family divided into anti-apoptotic and pro-apoptotic which Bcl-2 and Bcl-XL genes are members of a new class of oncogenes that act in cancer cells death mechanisms, especially apoptosis, that is controlled by numerous intra-and extracellular signals. Among new strategies to treat hematological cancer includes gene therapy mediated by RNA interference, which can decrease expression of genes like Bcl-2 family components. Studies of single gene silencing have not shown significant results so this study aimed to design an RNA interference (iRNA) homologous to two distinct types of messenger RNA (mRNA) and inhibit both genes Bcl-2 and Bcl-XL -XL as well as test the inhibition. Commercial cells Jurkat and Granta-519 were evaluated after transfection with iRNA as follows: Bcl-2, Bcl-XL, Bcl-2/Bcl-XL, Bcl-2+Bcl-XL and scramble. Our findings show that in Granta-519 cell line Bcl-2 RNAi sequence inhibits, alone or conjugated to Bcl-XL, Bcl-2 gene. Thus RNAi Bcl-2 appears more effective in gene silencing mechanism as it promotes cell death due chemotherapeutic agent etoposide toxicity.
Junior, Gilberto de Castro. "Expressão da proteína ERCC1 (Excision Repair Cross Complementing Group 1), do seu RNA mensageiro e de polimorfismos genéticos como fatores prognósticos em pacientes portadores de carcinoma epidermóide de cabeça e pescoço operados e submetidos à quimiorradioterapia adjuvante." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/5/5155/tde-05032010-111401/.
Full textBACKGROUND: Adjuvant concurrent chemoradiation (CRT) improves diseasefree survival (DFS) in patients diagnosed with head and neck squamous cell carcinoma (HNSCC) presenting with high-risk features treated with surgery with curative intent, but treatment-related toxicity is not negligible and its impact on overall survival (OS) is uncertain. ERCC1 (Excision Repair Cross Complementing Group 1) is a protein with a critical role in the nucleotide excision repair (NER) pathway, associated with resistance to chemo- and radiation therapy. We aimed here to study ERCC1 protein expression, ERCC1 messenger RNA (mRNA) expression and the single nucleotide polymorphism T19007C of ERCC1 as prognostic markers in HNSCC patients presenting with high-risk features treated with surgery and adjuvant CRT. METHODS: It is a retrospective study in patients with oral cavity, oropharynx, hypopharynx or larynx SCC submitted to radical surgery with curative intent and presenting with pathologic features of high- or intermediate-risk. Eligible patients were treated with adjuvant CRT: 60-70 Gy and concurrent cisplatin (100 mg/m2, days 1, 22 and 43), with no distant metastasis and no relapsed disease after surgery. ERCC1 protein expression was evaluated by immunohistochemistry, using a semi-quantitative H-score, calculated by multiplying the nuclear staining intensity (0-3) by the proportion score attributed to the percentage of positive tumor nuclei (0;0,1;0,5;1). Quantitative real-time reverse transcriptase polymerase chain reaction (PCR) assay was performed to determine ERCC1 mRNA expression in primary tumors tissue specimens. The ERCC1 mRNA expression was normalized using 18S fraction of ribosomal RNA expression as internal reference. ERCC1 (codon 118) genotypes were detected using PCR restriction fragment length polymorphism method carried out in genomic DNA extracted from normal lymph nodes. The PCR products were digested with BsrDI. RESULTS: 69 patients (median age 56 y, 81% male) were studied. Regarding tumor characteristics, primary sites were: oral cavity 41%, larynx 32%, hypopharynx 16%, oropharynx 12%, stage III 14%, stage IV 86%, pT3- pT4 78% and pN2-pN3 58%. Forty-three patients presented with two or more positive lymph nodes, 27 with extracapsular spread of nodal disease and 18 with positive margins. High-risk pathologic features were detected in 40 patients (58%). During the median follow-up of 47 months, we observed 11 locoregional relapses, seven distant relapses, 10 patients were diagnosed with secondary primary tumors (four in lungs and four in esophagus) and 30 deaths (22 disease-related). The 5-year overall survival rate was 40% and the 5-year disease-free survival rate was 31%. High H-score (> 1.5) was seen in 32 patients (54%), who presented better 5-year overall survival rate in comparison to those with lower H-scores (50% versus 18%, HR 0.43, 95%CI 0.20-0.90, p=0.026). Fifteen patients (out of 45, 33%) whose tumors presented normalized ERCC1 expression > 3.1 were classified as having high ERCC1 mRNA expression, and these patients presented better 5-year overall survival rate in comparison to those with lower ERCC1 mRNA expression (86% versus 30%, HR 0.26, 95%CI 0.14-1.01, p=0.052). Genotype distribution at ERCC1 codon 118 in 49 patients was 39% C/T, 37% C/C, and 24% T/T. No significant association was found between age, gender, stage, grading and pathological risk features and ERCC1 codon 118 genotypes or ERCC1 mRNA expression. No difference was detected among C/C, C/T and T/T genotypes, either in terms of 5-year overall survival rates (45%, 46%, 46%; p=0.808), or 5-year diseasefree survival rate (31%, 34%, 20%, p=0.770, respectively). H-score (> 1.5 versus 1.5; adjusted HR 0.20, 95%CI 0.07-0.57, p=0.003) and ERCC1 mRNA normalized expression (> 3.1 versus 3.1; adjusted HR 0.12, 95%CI 0.03-0.59, p=0.009), remained significant as favorable prognostic factors after adjusting for prognostic factors in a multivariate analysis. CONCLUSIONS: High immunohistochemical expression of ERCC1 protein and high ERCC1 mRNA expression, but not the T19007 single nucleotide polymorphism, were associated with better prognosis in HNSCC patients submitted to surgery and adjuvant cisplatin-based chemoradiation.
Saffi, Junior Mario Cezar. "Potencial dos fatores de risco associados aos marcadores biomoleculares RNAm IDO E RNAm CDKN2A/p16 na predição das lesões precursoras do câncer de colo uterino." Universidade Nove de Julho, 2015. http://bibliotecadigital.uninove.br/handle/tede/1300.
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The cervical cancer is the first cancer of the female genital tract in Brazil and HPV is essential factor for carcinogenesis. The Brazilian program tracking proposes conventional cervical cytology as the primary method to detect cervical cancer, despite its low sensitivity. Risk factors associated with the spread of HPV are despised and not rely on a biomolecular tool that can increase the program offered by the Ministry of Health. The aim of this study was to determine whether the risk factors for cervical cancer may contribute to the conventional cervical cytology to increase diagnostic sensitivity and assess whether the mRNA indoleamine 2,3 dioxygenase (IDO) and mRNA CDKN2A / p16 may increase the diagnostic yield of this neoplasm. The logistic regression analysis was based on clinical variables (risk factors), cytological and biomolecular to seek an association with pathological results. The proportion of explained variance (PVE) for each variable studied was calculated by the formula omega, whereas the sensitivity, specificity, positive predictive value and negative predictive value were calculated by the formulas of Galen and Gambino. We conclude that oral contraceptive showed greater predictive power of high-grade lesions compared to other risk factors, and that both the IDO mRNA as CDKN2A mRNA / p16 may help screening of cervical cancer, either when used alone, or in conjunction with conventional cervical cytology, increasing their sensitivity and maintaining a considerable specificity.
O câncer de colo uterino apresenta-se como a principal neoplasia do trato genital feminino no Brasil, sendo o HPV fator essencial para a carcinogênese. O programa brasileiro de rastreamento propõe a citologia oncológica cervical convencional como principal método para detectar o câncer do colo uterino, apesar da sua baixa sensibilidade. Os fatores de risco associados ao contágio do HPV são desprezados e não contamos com uma ferramenta biomolecular que possa incrementar o programa oferecido pelo Ministério da Saúde. O objetivo desse trabalho foi verificar se os fatores de risco para o câncer de colo uterino podem contribuir com a citologia oncológica cervical convencional para aumentar a sensibilidade diagnóstica e avaliar se o RNAm Indoleamine 2,3 dioxigenase (IDO) e o RNAm CDKN2A/p16 podem incrementar a capacidade diagnóstica dessa neoplasia. A análise de regressão logística foi baseada nas variáveis clínicas (fatores de risco), citológicas e biomoleculares a fim de buscar uma associação com o resultado anatomopatológico. A proporção de variação explicada (PVE) por cada uma das variáveis estudada foi calculada pela fórmula ômega, enquanto que a sensibilidade, especificidade, valor preditivo positivo e o valor preditivo negativo foram calculados pelas fórmulas de Galen e Gambino. Concluímos que o uso do contraceptivo oral mostrou um maior poder de predição de lesões de alto grau em relação aos demais fatores de risco, e que tanto a RNAm IDO quanto o RNAm CDKN2A/p16 poderem auxiliar no rastreamento do câncer de colo uterino, seja quando usados de forma isolada, seja conjuntamente com a citologia cervical convencional, elevando sua sensibilidade e mantendo uma considerável especificidade.
Ferreira, Kelly Pedrozo. "Caracterização da expressão de CD63 e KAI1/CD82 em células de câncer de vulva metastático e não metastático." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/5/5139/tde-20032019-123545/.
Full textVulvar squamous cell carcinoma (VSCC) accounts about 95% of vulvar tumors. When diagnosed at an early stage, prognosis is usually good. Although effective, surgical treatment can be mutilating and entails serious psychosocial damage to patients. Whilst molecular aspects in VSCCs have been investigated, mechanisms underlying the VSCC clinical and biological behavior are poorly understood. Tetraspanins (TSPANs) are membrane proteins, which can interact with several molecules. In addition, they are involved in physiological processes such as proliferation and migration. Besides that, several studies show the deregulated expression of TSPANs associated with cancer development. Previous results of our group showed higher expression of CD63, and lower expression of KAI1/CD82, in VSCC patient samples, compared to adjacent normal tissue. However, the role of these proteins in vulvar tumors remains uncertain. Thus, the aim of this work was to characterize CD63 and KAI1/CD82 gene and protein expression profile in VSCC metastatic and non-metastatic cells lines, and to investigate the effects of genetic manipulation on these cells behavior. The cell lines used in this work were SW954 (Non-metastatic) and SW962 (metastatic). The qRT PCR assays showed CD63 overexpression and KAI1/CD82 downexpression in the metastatic cells. Thus, we chose to perform transient manipulation of CD63 by interfering RNA (RNAi). The RNAi assays showed significant inhibitory effects of gene and protein expression of CD63 in both cell lines, by qRT PCR and immunocytochemistry (ICC), respectively, however, inhibition of TSPAN was more prominent in metastatic cells. When inhibited, CD63 showed a significant decrease in proliferation of non-metastatic (*p < 0.05) and metastatic cells (**p=0.0022), as well as migration of metastatic cells (*p < 0.05). Therefore, the results point to CD63 playing a relevant role in VSCC, since its inhibition compromises the proliferation and migration capacity of tumor cells. In addition, decrease in the expression of KAI1/CD82 metastasis suppressor corroborates with other data in different types of cancers. Taken together, these TSPANs may be considered not only important prognostic factors in VSCC, but potential therapeutic targets
Fernandes, Roberta Possato. "Quantificação do RNAm de tireoglobulina em sangue periférico de pacientes com câncer diferenciado de tireóide: acompanhamento a longo prazo." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/5/5135/tde-15042009-154717/.
Full textThe differentiated thyroid carcinoma (DTC) encloses 95% of all thyroid malignant disease. In USA, it increased 2,4 times in recent years (1973- 2002). The treatment includes total thyroidectomy, ablation with radioiodine (RAI) followed by TSH suppression with L-Thyroxine. The cancer recurrence occurs in 20% of the cases. Periodic evaluation through imaging examinations and serum thyroglobulin (TG) measurements by imunoassays method is recommended for careful follow-up of these patients. The anti-TG antibodies prevalence is 15-25% and would impair, partially, the serum TG use as a tumor marker. An alternative method to identify the recurrence of the tumor is the thyroid cells detection in peripheral blood, through the TG messenger RNA quantification (mRNA-TG) by real time RT-PCR. This new methodology increases the sensitivity detection for this molecule. The objective of this study was to verify the mRNA-TG peripheral blood quantification significance, as a complementary diagnostic method in the long term follow up of patients with DTC. Fourty five blood samples from patients with DTC have been collected before and 24, 48, 72 hours, 7 days, 1, 3, 6, 9 months, 1, 2, 4, 5, 6 and 7 years after the ablation therapy. Extensive technique standardization for mRNA-TG measurements was carried out to exclude methodological interventions and two housekeeping genes (GAPDH and HPRT1) were used to calculate the mRNA-TG concentrations. Concomitantly, serum TG measurements, hormonal profile and antibodies anti-TG assays were performed. The whole body scan was performed 7 days after RAI ablation to determine the stage of the disease. It was not possible to establish a cut-point value for mRNA-TG. The mRNA-TG did not differentiated the clinical stage of the disease in the long term follow-up and neither in the presence of anti-TG antibodies and TSH30ng/mL. Serum TG was able to differentiate the clinical stage of the patients during the follow-up. In conclusion mRNA-TG is not a good marker for the DCT recurrence, even when technical standardization, long term evaluation and the presence of antibodies anti-TG were considered. Thus it could not be used as a complementary diagnostic method in the DTC patients follow-up. This study confirmed the high sensivity of the real time RT-PCR whereas with very low specificity, consequently is unviable to be used in the DTC patients follow-up
Neto, Guilherme Tude Coelho. "Peptídeo antimicrobiano LL-37 e seus efeitos em stemness de diferentes células tumorais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/5/5164/tde-06032017-104147/.
Full textAntimicrobial peptides play critical protective roles in a range of human diseases, including cancer. Multiple studies have demonstrated functions -- such as proliferation, angiogenesis, apoptosis and immunomodulation -- of these peptides in crucial cancer pathways. We investigated the role of the antimicrobial peptide LL-37 on stemness in breast cancer (SKBR3) and melanoma cells (A375). PCR array analysis of differential gene expression in SKBR3 and A375 cancer cell lines downregulated for LL-37 expression by siRNA revealed downregulation of genes related to stemness, including telomerase reverse transcriptase, forkhead box D3 and undifferentiated embryonic cell transcription factor 1, remarkably in breast cancer cells. Furthermore, SKBR3 cells knocked down for LL-37 expression showed a decreased production of oncospheres in comparison with negative controls, while A375 cells exhibited increased production. Taken collectively, our findings indicate a role for LL-37 in cancer cell stemness depending on the cell type
Nenad, Lalović. "Faktori rizika značajni za nastanak dehiscencije staplerskih anastomoza kod pacijenata operisanih zbog karcinoma rektuma." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=101255&source=NDLTD&language=en.
Full textINTRODUCTION: Colorectal anastomosis, which is formed deep in the pelvis because of establishment of continuity of gastrointestinal tract after resection of the part of intestines, has got its specifities during forming and healing process and when complications occur. Systemic, local and technical factors influence the healing process of anastomosis itself. Any kind of compromise in terms of these principles causes higher risk of complications! The most serious complication of anastomosis is dehiscence. “Only anastomosis which is not carried out will not dehisce.” This old surgical saying is still true, and the more distal anastomosis is, the possibility of development of dehiscence is higher, especially in lower subperitoneal anastomosis with rectum and anus. Incidence of dehiscence of these anastomosis in literature varies from 0,5 to 69 %, which may indicate the quality of surgical work, use of definition of dehiscence, kind of diagnostics etc. International group for rectal cancer defined dehiscence of anastomosis as a defect of intestinal wall, including suturing or stapler line of neorectal reservoir, which leads to communication between intra and extra luminal space. AIMS: Basic aim of this study was to determine preoperative and postoperative risk factors significant for the development of dehiscence of colorectal anastomosis, as well as significance of procalcitonin and C-reactive protein in detection of dehiscence of colorectal anastomosis at the subclinical stage of the disease. MATERIAL AND METHODOLOGY: The study included 100 patients operated on in the elective programme, on which radical operation of the rectal cancer was carried out with creation of double stapler colorectal anastomosis. All patients included in the study were randomly chosen and divided into two groups. Group A: the patients on which radical operation of the rectal cancer was carried out and primary stapler colorectal anastomosis created. Group B: the patients on which radical operation of the rectal cancer was carried out using Hartman's procedure in the first act, and reconstruction of the continuity of gastrointestinal tract was established in the second act by creation of secondary stapler colorectal anastomosis. By application of statistical tests preoperative (sex, age, comorbidities, ASA score, body mass index, preoperative application of haemoradiotherapy, laboratory analyses) and perioperative (duration of operation, distance of anastomosis from anocutaneous line, size of tumor in cm, intraoperative application of blood) risk factors for development of dehiscence of anastomosis in both groups were analysed. In all patients on the second and fourth postoperative day values of C-reactive protein and procalcitonin in the serum were analysed, regardless of the existence of clinically or non-clinically manifested signs of dehiscence of anastomosis. Also, sensitivity, specifity and diagnostically accurate C-reactive protein and procalcitonin on the second and fourth postoperative day in detection of dehiscence of colorectal anastomosis were analysed by application of ROC curve. RESULTS: There is no statistically significant difference in the development of dehiscence of anastomosis between primary and secondary double stapler anastomosis. Incidence of dehiscence of anastomosis was 11% in all samples. Eight patients were reoperated on, whereas three patients were treated conservatively. In three patients who developed dehiscence and were reoperated on, the death occurred due to sepsis and septic shock. Sex, age, comorbidities, stage of the disease, duration of operation, intraoperative application of blood were not statistically significant risk factors (p>0,05) for the development of dehiscence of primary and secondary double stapler colorectal anastomosis. Distance of anastomosis from anocutaneous line (<7cm), size of tumor over 5 cm were statistically significant risk factors for the development of dehiscence of anastomosis. There is highly statistically significant difference (p<0,001) values of CRP and PCT on the fourth postoperative day in patients with and without dehiscence of colorectal anastomosis. On the basis of ROC analysis of CRP for the fourth postoperative day, for the bordering value of 130 mg/l sensitivity is 82%, specificity 96% and diagnostic accuracy 94%. For bordering value of PCT of 0,78 ng/ml for the fourth postoperative day, by application of ROC curve, the following values were determined: sensitivity 91%, specificity 92% and diagnostic accuracy 86%. CRP for the fourth postoperative day has got higher diagnostic accuracy and specificity in detection of dehiscence of colorectal anastomosis in relation to PCT. CONCLUSION: In spite of huge technological advance, improvement of surgical techniques, better understanding of the nature of malignant diseases, improvement of intraoperative and postoperative continuous follow up of the patient, introduction of new antimicrobial medicines, the problem in treating and development of dehiscence of colorectal anastomosis is still significantly present. Detection of dehiscence of colorectal anastomosis at the subclinical stage, identification of preoperative and perioperative risk factors significant for the development of dehiscence would help in early detection of dehiscence and contribute to more effective operations.