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Academic literature on the topic 'Clorambucile'
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Journal articles on the topic "Clorambucile"
Turan, T., O. Karacay, G. Tulunay, N. Boran, S. Koc, S. Bozok, and M. F. Kose. "Results with EMA/CO (etoposide, methotrexate, actinomycin D, cyclophosphamide, vincristine) chemotherapy in gestational trophoblastic neoplasia." International Journal of Gynecologic Cancer 16, no. 3 (2006): 1432–38. http://dx.doi.org/10.1136/ijgc-00009577-200605000-00074.
Full textOrtiz-Santamaría, Vera, Mónica Gumà, Alejandro Olivé, and Xavier Tena. "Clorambucilo en el tratamiento de la amiloidosis secundaria." Medicina Clínica 114, no. 17 (January 2000): 679. http://dx.doi.org/10.1016/s0025-7753(00)71399-6.
Full textMacedo, Danielle Mazziero, Sérgio Henrique Hirata, Nílceo S. Michalany, Mílvia Maria Simões, Silva Enokihara, and Mauro Y. Enokihara. "Xantogranuloma necrobiótico solitário sem paraproteinemia." Anais Brasileiros de Dermatologia 83, no. 3 (June 2008): 243–46. http://dx.doi.org/10.1590/s0365-05962008000300009.
Full textValdivia Ponce, Eduardo. "Cáncer de ovario." Revista Peruana de Ginecología y Obstetricia 13, no. 3 (June 12, 2015): 163–75. http://dx.doi.org/10.31403/rpgo.v13i867.
Full textSAMANO, MARCOS NAOYUKI, RENATA TEIXEIRA LADEIRA, LUIZ PEDRO MEIRELES, and PAULO MANUEL PÊGO-FERNANDES. "Aneurisma de artéria pulmonar como manifestação da doença de Behçet." Jornal de Pneumologia 28, no. 3 (June 2002): 150–54. http://dx.doi.org/10.1590/s0102-35862002000300007.
Full textCarriço, Maria Kadma da Silva, and Maria Inez Pordeus Gadelha. "Alemtuzumab (Campath-1H) para tratamento da leucemia linfóide crônica." Revista Brasileira de Cancerologia 49, no. 2 (June 30, 2003): 121–25. http://dx.doi.org/10.32635/2176-9745.rbc.2003v49n2.2114.
Full textSantana, Alfredo Nicodemos Cruz, Telma Antunes, Juliana Monteiro de Barros, Ronaldo Adib Kairalla, Carlos Roberto Ribeiro de Carvalho, and Carmen Silvia Valente Barbas. "Acometimento pulmonar na doença de Behçet: uma boa experiência com o uso de imunossupressores." Jornal Brasileiro de Pneumologia 34, no. 6 (June 2008): 362–66. http://dx.doi.org/10.1590/s1806-37132008000600005.
Full textDissertations / Theses on the topic "Clorambucile"
CICCONE, SARAH. "Studio dei polimorfismi delle glutatione trasferasi nell'aumentata suscettibilità ai processi tumorali: caratterizzazione strutturale e funzionale della glutatione trasferasi di cianobatterio." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1219.
Full textGlutathione S-transferases (GSTS) are considered part of a coordinated defence strategy, together with other GSH-dependent enzymes, the cytochrome P450s (Phase I enzymes) and some membrane transporters (Phase III) such as MRP1 and MRP2, to remove from the cell the products of oxidative stress generated after interaction of reactive oxygen species, that escape the first line of defense, with cellular macromolecules such as DNA, lipids and proteins. Glutathione S-transferases (EC 2.5.1.18) catalyze the conjugation of glutathione (GSH) with a variety of toxic compounds (carcinogens, anticancer drugs, reactive oxygen species and products of cellular metabolism) that contain an electrophilic atom, i.e. carbon, nitrogen or sulphur. In mammals, there are three major families of proteins that exhibit glutathione transferase activity: two of these, the cytosolic and mitochondrial GSTs, comprise soluble enzymes, while the third family are microsomal (MAPEG) and are referred to as membrane-associated proteins in eicosanoid and glutathione metabolism (Hayes et al., 2005). The human cytosolic GSTs are dimeric proteins; each subunit contains a very similar binding site for GSH (G-site) and a second one for the hydrophobic co-substrate (H-site). Structural differences at the H-site confer a certain degree of substrate selectivity. The human cytosolic GSTs can be grouped into at least seven gene-independent classes on the basis of their amino acid sequence and immunological properties: Alpha, Mu, Pi, Sigma, Theta, Omega, and Zeta Cytosolic GSTs display polymorphisms in humans, and this is likely to contribute to interindividual differences in responses to xenobiotics . A lot of studies suggest that that combinations of polymorphisms in Mu, Pi, and Theta class GST contribute to diseases development. In the first part of this work we analyzed three common polymorphisms in the GSTP1, GSTT1, and GSTM1 genes either decrease or abolish GST enzyme activity: the GSTP1 allelic variants, that differ at either a single codon position (Ile104 (HGSTP1*A), Val104 (HGSTP1*B), Val113 HGSTP1*D) or at two different positions (Val104/Val113 (HGSTP1*C)), and the homozygous deletions of the GSTT1 or GSTM1 gene that lead to an absence of enzymatic activity. The commonly used anti-cancer drug chlorambucil is the primary treatment for patients with chronic lymphocytic leukaemia. Chlorambucil has been shown to be detoxified by human glutathione transferase Pi (GST P1-1), an enzyme that is often found over-expressed in cancer tissues. The allelic variants of GST P1-1 are associated with differing susceptibilities to leukaemia and differ markedly in their efficiency in catalysing glutathione (GSH) conjugation reactions. Here, we perform detailed kinetic studies of the allelic variants with the aid of three representative co-substrates. We show that the differing catalytic properties of the variants are highly substrate-dependent. We show also that all variants exhibit the same temperature stability in the range 10 °C to 55 °C. We have determined the crystal structures of GST P1-1 in complex with chlorambucil and its GSH conjugate for two of these allelic variants that have different residues at positions 104 and 113. Chlorambucil is found to bind in a non-productive mode to the substrate-binding site (H-site) in the absence of GSH. This result suggests that under certain stress conditions where GSH levels are low, GST P1-1 can inactivate the drug by sequestering it from the surrounding medium. However, in the presence of GSH, chlorambucil binds in the H-site in a productive mode and undergoes a conjugation reaction with GSH present in the crystal. The crystal structure of the GSH–chlorambucil complex bound to the *C variant is identical with the *A variant ruling out the hypothesis that primary structure differences between the variants cause structural changes at the active site. Finally, we show that chlorambucil is a very poor inhibitor of the enzyme in contrast to ethacrynic acid, which binds to the enzyme in a similar fashion but can act as both substrate and inhibitor. In another part of this work we determined in the peripheral blood lymphocytes of 157 workers exposed to benzene, using 25 individuals not exposed as external controls, the presence of polymorphic genes GSTT1 and GSTM1 and the distribution of GSTP1 allelic variants. We have also evaluated the glutathione transferases (GST) activities and the levels of glutathionylated hemoglobin in the RBC of the same samples. Because this study is in progress again, we can’t estabilish the finals conclusions. During my Phd project I have also analyzed the presence of GSTP1-1 enzyme in prostatic cancer cells lines. In contrast to frequent overexpression of GST-pi observed in many types of cancer, the vast majority of primary human prostate tumors contain no detectable GST pi. So, this enzyme is abundant in normal prostate basal epithelial cells, but basal cells are lost during development of invasive cancer. Absence of GST pi expression in human prostate cancer is accompanied by hypermethylation of regulatory sequences within the GST pi gene, whereas no such hypermethylation is present in normal tissues or benign prostatic hyperplasia (HPB). So we employed Western blot analysis and specific activity assays to measure GST pi expression in diferrents prostatic cancer cells lines selected on the basis of their tumor staging. We have analyzed HBP lines (positive controls), G1 cells lines (associated with a negative prognosis), G2 cells lines (associated with good prognosis) and LNCaP (negative controls). At the and of this study we observed that the most relevant expression of GST pi was detectable in HPB cells, but also in G2 and G1 cells is possible to note a very low presence of this enzyme. The last part of my project comprehend the purification and the enzymatic caratherization of a new GST, called GST short, sequenzed by the cyanobacteria Synechocystis sp PCC 6803 genome. Cyanobacteria represent a group of widely distributed prokaryotes performing oxygenic photosynthesis similar to plants. This, together with their generally accepted role as progenitors of plant plastids, and their ease of genetic manipulation, has made them extremely useful in studies of environmental gene regulations and the mechanism of oxygenic photosynthesis. In according to its phylogenetic origin, GST short presents a very similar G-site sequence with the sequence previously described for GSTI and GSTIII of Zea mays. It is also active towards several classical substrates, but at the same moderate rates that have been observed for other glutathione transferases derived from prokaryotes. Particulary, it was possible observe a strong perossidase activity. We have also analyzed the GST short thermal stability respect to hGSTP1-1 (10°-55°C) and the results indicate that the cyanobacterial enzyme is less resistant at this temperatures than human enzyme probably because its different structure. The cloning, expression and characterization of this cyanobacterial glutathione transferase is also described . The possible significance of the observed catalytic properties is discussed in the context of structural organization and glutathione transferase evolution.
Dias, Diego Juscelino Santos. "Nanopartículas poliméricas contendo clorambucil funcionalizadas com peptídeo direcionador : produção, caracterização e ensaios biológicos com células tumorais." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/31275.
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O câncer de mama é uma doença que causa temor e morte entre as mulheres. Com o intuito de melhorar a qualidade de vida de pacientes e elevar a eficiência de tratamentos já empregados clinicamente, foram estudadas novas formulações para transporte e liberação sustentada de um fármaco. Pelo método de emulsificação e evaporação do solvente, foram produzidas partículas poliméricas contendo o antitumoral clorambucil submetidas a dois procedimentos diferentes para funcionalização primária (acoplamento com EDC/NHS e associação com DOPA) e posterior funcionalização secundária com o peptídeo direcionador ciclo-RGD. As formulações obtidas foram avaliadas quanto às características morfológicas, citotóxicas e físico-químicas (diâmetro hidrodinâmico e distribuição de tamanho, potencial zeta, perfil de liberação in vitro, eficiência de encapsulamento, análises térmicas diferencias e termogravimétricas, análises espectroscópicas na região UVvis, de FTIR e de emissão de fluorescência). Imagens de MEV demostraram que as formulações apresentam forma esférica, com pouca porosidade e, considerando os dados obtidos por DLS, apresentaram tamanho entre 290 e 370 nm e PDI entre 0,200 e 0,250. Valores negativos de potencial zeta (-10,77 mV) demonstram que as partículas possuem baixa tendência à agregação em meio aquoso. Foram obtidos elevados valores de eficiência de encapsulamento (média de 88,0%). Estudos da citotoxidade por meio de ensaios de viabilidade com MTT e da internalização das partículas in vitro com células tumorais de mama (MCF-7) e de fibroblastos (NIH- 3T3) demonstram que as formulações funcionalizadas com o tripeptídeo tiveram mais eficiência no tratamento quando comparadas com as formulações controle ou sem funcionalização. Pelos ensaios realizados, foi possível concluir que as formulações produzidas correspondem a promissores sistemas de transporte e liberação sustentada e poderão contribuir para o aumento dos índices de seletividade e eficiência terapêutica, biodisponibilidade, elevação da sítioespecificidade e consequente redução de efeitos adversos do clorambucil.
The breast cancer is a disease that causes fear and death among women. In order to improve the quality of life of patients and to increase the efficiency of treatments already employed clinically, new formulations for the transport and sustained release of a drug were studied. Polymorphic particles containing the chlorambucil antitumor were submitted to two different procedures for primary functionalization (EDC/NHS coupling and DOPA association) and subsequent secondary functionalization with the cyclo-RGD targeting peptide. The obtained samples were evaluated for morphological, cytotoxic and physicochemical characteristics (hydrodynamic diameter and size distribution, zeta potential, in vitro release profile, encapsulation efficiency, thermogravimetric and thermal analysis, spectroscopic analysis in the UV-vis region, FTIR and fluorescence emission). SEM images showed that the samples had spherical shape, low porosity and, considering the data obtained by DLS, presented a size between 290 and 370 nm and PDI between 0,200 and 0,250. Negative values of zeta potential (-10.77 mV) demonstrate that the particles in aqueous medium have low tendency to aggregate. High values of encapsulation efficiency were obtained (mean of 88.0%). Cytotoxicity studies via MTT viability assays and in vitro particle internalization with breast tumor cells (MCF- 7) and fibroblast cells (NIH-3T3) demonstrated that the tripeptide functionalized samples were more efficient in the treatment when compared to control samples or without functionalization. Through the carried out tests, it was possible to conclude that the produced samples are promising systems for transport and sustained release and they could contribute to the increase of selectivity and therapeutic efficiency indexes, bioavailability of site-specificity and consequent reduction of adverse effects of this drug.
Dias, Diego Juscelino Santos. "Síntese, caracterização físico-química, morfológica e avaliação de viabilidade de células tumorais de mama (MCF-7) submetidas à nanoesferas de PLGA contendo clorambucil." reponame:Repositório Institucional da UnB, 2012. http://repositorio.unb.br/handle/10482/12490.
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Sendo uma doença de alta incidência no mundo e no Brasil, o câncer de mama causa temor e morte entre as mulheres. Visando uma melhoria da qualidade de vida do paciente e uma maior eficiência dos tratamentos, há uma busca constante por novos medicamentos e formas para transporta-los até os tumores. Neste trabalho, através dos procedimentos de simples e de dupla emulsificação foram sintetizadas nanopartículas poliméricas biodegradáveis de ácido poli(D,L-láctico-co-glicólico) contendo o agente antitumoral clorambucil (CHB). Através do processo de nanoencapsulamento espera-se evitar a precipitação sistêmica do fármaco, efeitos adversos indesejados além de aumentar a seletividade e eficiência da quimioterapia. Após o preparo das nanopartículas, foram avaliados parâmetros físico-químicos, morfológicos e citotóxicos, onde se destacam as análises de: distribuição de tamanho, potencial zeta, perfil de liberação in vitro, eficiência de encapsulamento, análises térmicas diferencias e termogravimétricas simultâneas, análises espectroscópicas de absorção eletrônica na região UV-vis, no infravermelho com transformada de Fourier e de fluorescência do clorambucil e fluoresceína, em solução e quando encapsulados na matriz polimérica. As técnicas de microscopia eletrônica de varredura e de espalhamento dinâmico da luz mostraram que as partículas apresentam forma esférica, não porosa, com distribuição de tamanho entre 235,0 e 345,0 nm. As estruturas produzidas apresentaram baixa tendência a se agregarem devido ao valor de potencial zeta (entre -23,0 e -5,90 mV). A eficiência de encapsulamento foi de até 92,0%. A citotoxidade celular in vitro para células tumorais de mama (MCF-7) e para a linhagem de fibroblastos NIH-3T3 foi avaliada através de ensaios de viabilidade com MTT, sendo que, o sistema de liberação se apresentou mais eficiente do que o fármaco na forma livre em diversas concentrações para ambas as linhagens. Dessa forma, os sistemas de liberação produzidos apresentaram-se promissores DDS e poderão contribuir para o aumento da eficiência terapêutica, biodisponibilidade e redução de efeitos adversos. _______________________________________________________________________________________ ABSTRACT
Being a high incidence of disease in the world and in Brazil, breast cancer causes fear and death among women. With an aim of improving the live quality of patients and greater efficiency of the treatments there is a constant search for new drugs and ways to transport them to the tumor cells. Through the procedures single and double emulsification followed by solvent evaporation were synthesized biodegradable polymeric nanoparticles of poly(D,L-lactic-o-glycolic) acid containing chlorambucil. This technique has been widely adopted to obtain particles containing hydrophobic drugs and its purpose is to prevent systemic precipitation of the drug, undesirable side effects, increase the selectivity and efficiency of chemotherapy. Were determined physicochemical parameters such as size, morphology and regularity of particles, zeta potential, in vitro release profile, encapsulation efficiency. simultaneous differential thermal and thermogravimetric analysis, differential scanning calorimetry, and electronic absorption spectra in the UV-vis region, FTIR spectroscopy and fluorescence of chlorambucil, fluorescein, polymeric matrix and nanoparticles containing these encapsulated compounds were obtained. Scanning electron microscopy which together with the technique of dynamic light scattering showed that the particles showed up spherical, non-porous, with homogeneous distribution in size and diameter up to 235.0-345.0 nm. The structures produced showed no tendency to aggregate due to their negative zeta potential (below -5.90 mV) and the encapsulation efficiency was up to 92.0%. The in vitro cell cytotoxicity to breast tumor cells (MCF-7) and the fibroblast line NIH-3T3 cells was evaluated by MTT viability assays, where the release system is made more effective than the free drug for both tumor and fibroblasts cells in several concentrations. Thus, the delivery systems manufactured as showed promising DDS which can contribute to increasing the therapeutic efficacy, bioavailability and reduced adverse effects of chlorambucil.
Anaya, González Cristina. "Design of New Up-conversion Systems for Anticancer Therapies." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/172665.
Full text[CA] El càncer és una de les principals causes de mort a nivell mundial. Els tractaments anticancerígens generalment usats tenen diversos efectes secundaris produïts per la seva baixa especificitat. Aquesta és una de les raons per les que se segueix en contínua recerca de nous tractaments. Dins d'aquestes noves investigacions es troba l'extens camp de la nanomedicina, és a dir, l'estudi de nous materials a escala nanomètrica. Aquesta permet reduir aquests efectes secundaris augmentant la selectivitat i especificitat dels tractaments. Dins dels nanomaterials es troben les nanopartícules de upconversion que són capaços d'absorbir llum en l'infraroig proper i emetre-la en la regió ultraviolada-visible. D'altra banda, des del principi de la història de la medicina la llum s'ha emprat com a forma de tractament tenint un paper molt important. Un inconvenient per aquests tractaments sol ser la necessitat d'emprar llum de la regió ultraviolada-visible, ja que les biomolècules són capaços d'absorbir-la i produïr dany cel·lular. En aquest context, la present Tesi Doctoral es centra en l'estudi de noves formes de tractament anticancerigen combinant nanomedicina i llum. Per això s'han desenvolupat nous fàrmacs fototòxics i nous materials capaços de ser activats mitjançant llum infraroja propera. En primer lloc, es van sintetitzar noves fluoroquinolones per explorar les seves propietats fototòxiques per al seu ús en fotoquimioteràpia (Capítol 3 de la Tesi). Es van estudiar les característiques fotofísiques i fotoquímiques dels nous compostos, a més de la seva capacitat per produir major fototoxicitat en les cèl·lules en comparació amb les fluoroquinolones com la lomefloxacina mitjançant l'aplicació de llum ultraviolada. En base als resultats obtinguts es va realitzar un estudi per determinar les diferències entre les interaccions d'algunes fluoroquinolones dihalogenades, incloses les comentades anteriorment, i biomolècules com ADN i proteïnes. La reactivitat de les seves intermedis fotogenerats també es va estudiar en el Capítol 4. Després de conèixer en profunditat la capacitat fototòxica dels nous fàrmacs, en el Capítol 5 es va dur a terme el disseny d'un nanosistema compost per fluoroquinolones i nanopartícules de upconversion. Es va demostrar l'alta capacitat fototòxica d'aquest nou nanosistema. D'aquesta manera, es va generar activitat fototòxica a partir d'una fluoroquinolona sense l'ús de llum ultraviolada D'altra banda, la formació de profàrmacs obre la porta a l'administració selectiva de fàrmacs contra el càncer. Els profàrmacs consisteixen en la unió fotolábil d'una molècula capaç de ser activada per la llum i el fàrmac d'interès. No obstant això, un coneixement profund de les propietats fotofísiques i fotoquímiques del fotodisparador i dels potencials redox de tots dos membres de la diada pot ser crucial per obtenir el fotoalliberament desitjada. Així, en el Capítol 6, es va destacar la rellevància d'aquestes dades utilitzant un profàrmac format per un derivat de cumarina com a molècula fotoactivable i colquicina com a fàrmac. Finalment, en el Capítol 7 es va explorar la síntesi d'un nou nanosistema que conté un profàrmac format per un derivat de cumarina unit a l'fàrmac contra el càncer clorambucilo i nanopartícules biocomatibles de upconversion. L'addició d'albúmina de sèrum humà com a recobriment de les nanopartícules compleix la doble funció d'obtenir nanopartícules biocompatibles i ser el lloc de càrrega del profàrmac.
[EN] Cancer is one of the leading causes of death worldwide. Generally used anticancer treatments have various side effects produced by their low specificity. This is one of the reasons why the search for new treatments continues. Within these new investigations is the extensive field of nanomedicine, which can be explained as the study of new materials on a nanometric scale. It can be translated in the reduction of these side effects by increasing the selectivity and specificity of the treatments. Among the nanomaterials are upconversion nanoparticles that are capable of absorbing light in the near infrared and emit it in the ultraviolet-visible region. On the other hand, since the beginning of the history of medicine, light has been used as a form of treatment, having a very important role. A drawback for such treatments is sometimes the need to use light from the ultraviolet-visible region since biomolecules are capable of absorbing and causing cell damage. In this context, this Doctoral Thesis focuses on the study of new forms of anticancer treatment combining nanomedicine and light. For this, new phototoxic drugs and new materials capable of being activated by near infrared light have been developed. First, new fluoroquinolones were synthesized to explore their phototoxic properties for using in photochemotherapy (Chapter 3 of the Thesis). The photophysical and photochemical characteristics of the new compounds were studied, in addition to their ability to produce greater phototoxicity in cells than fluoroquinolones such as lomefloxacin by applying ultraviolet light. Based on the results obtained, a study was carried out to determine the differences between the interactions of some dihalogenated fluoroquinolones including the above commented, and biomolecules such as DNA and proteins. The reactivity of their photo-generated intermediates was also studied in Chapter 4. After a deep knowledge of the phototoxic capacity of the new drugs, design of a nanosystem composed of fluoroquinolones and upconversion nanoparticles was carried out in Chapter 5. The high phototoxic capacity of this new nanosystem was demonstrated. In this way phototoxic activity was generated from a fluoroquinolone without the use of ultraviolet light. On the other hand, the formation of prodrugs opens a door to the selective administration of anticancer drugs. Prodrugs consist of the photolabile binding of a molecule capable of being activated by light and the drug of interest. However, a knowledge of the photophysical and photochemical properties of the phototrigger as well as the redox potentials of both members of the dyad can be crucial to obtain the desired photorelease. Thus, in Chapter 6, the relevance of these data was highlighted using a prodrug formed by a coumarin derivative as a photoactivatable molecule and colchicine as a drug. Finally, in Chapter 7 the synthesis of a new nanosystem containing a prodrug formed by a derivative of coumarin linked to the anticancer drug chlorambucil, and upconversion biocompatible nanoparticles was explored. The addition of human serum albumin as a coating for the nanoparticles fulfills the dual function of obtaining biocompatible nanoparticles and being the loading site for the prodrug.
Anaya González, C. (2021). Design of New Up-conversion Systems for Anticancer Therapies [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/172665
TESIS
Books on the topic "Clorambucile"
COSTA, A. O. Nanopartículas de PLGA contendo clorambucil e funcionalizadas com O-estearoil manose: síntese, caracterização e avaliação da ação citotóxica em células tumorais. Dialética, 2022. http://dx.doi.org/10.48021/978-65-252-2521-0.
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