Dissertations / Theses on the topic 'V(D)J recombinaison'
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Montpellier, Bertrand. "Recombinaison V(D)J illégitime et développement de leucémies aigues lymphoblastiques T." Aix-Marseille 2, 2008. http://theses.univ-amu.fr.lama.univ-amu.fr/2008AIX22086.pdf.
Full textT-ALL is a lymphoid neoplasia that accounts for 10-15% of pediatric ALL and 25% of adult ALL. Alarmingly, and despite indisputable success achieved in treatments its incidence is increasing and its prognostic remains pejorative. Survival rate outcome depend notably on a better understanding in pathogenic mechanisms. In this context, the thesis work has been the following: 1) Based on the observation that rare chromosomal SJ keep on recombining in cis using V(D)J recombination, we hypothesized that episomal SJ (ESJ) still remain reactives and can undergo genomic reintegration. We show that mechanistically, ESJ efficiently rearrange in trans and that the cRSS, the sequences targeted in oncogenic chromosomal translocations, are good ESJ integration sites. Moreover, we demonstrate the presence of ESJ reintegration events in vivo and estimate their frequency to ~1/104-6. In conclusion, ESJ reintegration is a potential mechanism of oncogenic deregulation. 2) Conventional and illegitimate V(D)J recombination events (e. G. Translocations) are ordered during lymphocyte development. Based on our knowledge on chromosomal translocation mechanisms, we determine the kinetics of a subset of oncogenic activations acquired during the transformation process in a T-ALL patient’s leukemic cells. Moreover, we identified up to 10 independent oncogenic events in this patient, illustrating the multi-hit characteristic of T-ALL. Finally, the oncogenic event’s functional impact suggests that cMyc play an important role in the particularly aggressive features of the T-ALL developed by this patient
Maës, Jérôme. "Régulation de la recombinaison V(D)J et structure chromatinienne des gènes des immunoglobulines." Paris 6, 2001. http://www.theses.fr/2001PA066455.
Full textCorneo, Barbara. "Physiopathologie de la recombinaison v(d)j : structure et fonction des proteines rag1 et rag2." Paris 5, 2001. http://www.theses.fr/2001PA05N025.
Full textBouvier, Gaëlle. "Contrôle des recombinaisons V(D)J et de l'expression du locus TCR (Béta) : rôle de l'enhancer E(Béta) : analyse par transgénèse et recombinaison homologue." Aix-Marseille 2, 1996. http://www.theses.fr/1996AIX22085.
Full textMarcou, Quentin. "Probabilistic approaches to the adaptive immune repertoire : a data-driven approach." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB029/document.
Full textAn individual’s adaptive immune system needs to face repeated challenges of a constantly evolving environment with a virtually infinite number of threats. To achieve this task, the adaptive immune system relies on large diversity of B-cells and T-cells, each carrying a unique receptor specific to a small number of pathogens. These receptors are initially randomly built through the process of V(D)J recombination. This initial generated diversity is then narrowed down by a step of functional selection based on the receptors' folding properties and their ability to recognize self antigens. Upon recognition of a pathogen the B-cell will divide and its offsprings will undergo several rounds of successive somatic hypermutations and selection in an evolutionary process called affinity maturation. This work presents principled probabilistic approaches to infer the probability distribution underlying the recombination and somatic hypermutation processes from high throughput sequencing data using IGoR - a flexible software developed throughout the course of this PhD. IGoR has been developed as a versatile research tool and can encode a variety of models of different biological complexity to allow researchers in the field to characterize evermore precisely immune receptor repertoires. To motivate this data-driven approach we demonstrate that IGoR outperforms existing tools in accuracy and estimate the sample sizes needed for reliable repertoire characterization. Finally, using obtained model predictions, we show potential applications of these methods by demonstrating that homozygous twins share T-cells through cord blood, that the public core of the T cell repertoire is formed in the pre-natal period and finally estimate naive T cell clone lifetimes in human
Ouled, Haddou Hakim. "Exploration du locus de la chaine légère kappa des immunoglobulines : caractérisation d'une nouvelle région régulatrice et identification de phénomène particulier de recombinaison." Amiens, 2014. http://www.theses.fr/2014AMIED008.
Full textCayuela, Jean-Michel. "La recombinaison V-(D)-J : étude de l'expression des gènes RAG1 et RAG2 dans les cellules lymphoi͏̈des malignes humaines." Paris 5, 1991. http://www.theses.fr/1991PA05P177.
Full textOudinet, Chloé. "Mécanismes transcriptionnels et épigénétiques dans la régulation de l'expression du locus IgH murin au cours du développement des lymphocytes B." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30106.
Full textB lymphocytes have the unique ability to produce immunoglobulins (Ig). The vast Ig diversity and exquisite specificity of Igs result from various cellular and molecular mechanisms including recombinational and mutational processes within Ig heavy and light chain loci. These loci are subjected to multiple layers of regulation during B cell development involving epigenetic and transcriptional mechanisms that orchestrate the stepwise and ordered activation of these loci. During my thesis, I was interested in two recombinational processes that take place within the Ig heavy chain locus (IgH locus) : V(D)J recombination and class switch recombination (CSR). Both processes require transcription of target sequences. This transcription, called germline transcription, plays an important role in the regulation of target sequence accessibility to the enzymes that initiate these processes. Specifically, I studied three aspects of the murine IgH locus expression regulation during early and late B cell development: 1) The role of germline transcription in the regulation of V(D)J recombination. V(D)J recombination initiates within "recombination centres" that are highly enriched in transcriptional activity, but the causal relationship between transcription and recombination remains controversial. By using a mouse model and single-cell analyses of transcription and recombination, I showed that V(D)J recombination could occur in the absence of detectable transcription within recombination centres, strongly suggesting that the two processes involve distinct mechanisms. 2) The role of DNA methylation in CSR-associated germline transcription. The precise role of this epigenetic mark in the control of germline transcription is presently unknown. I determined the methylation patterns of various IgH cis-acting elements in primary cells of different mouse lines. I showed that in B cells, the methylation patterns of most cis-elements were established and maintained independently of B cell activation or germline transcription, and that specific promoters were hypomethylated early during embryonic development, before B cell commitment, pointing to a role of DNA methylation in the epigenetic pre-marking of the locus rather than in the regulation of its expression. Molecular basis of Sµ specificity. CSR involves recombination between Sµ region, the universal switch donor, and a downstream partner S region. Numerous studies suggest that Sµ displays specific features that distinghuish it from the other S regions, but the molecular basis of this specificity is unknown. By using a mouse model in which a downstream S region was placed under the control of elements that regulate Sµ region transcription, I showed that, among the different factors involved in Sµ specificity, the proximity of a particular enhancer was important and sufficient to confer the CSR donor site function to the downstream S region
Cayuela, Jean-Michel. "Inactivation du locus MTS dans les leucémies aigues lymphoblastiques de la lignée T : implication de la recombinaison V-(D)-J." Paris 7, 1999. http://www.theses.fr/1999PA077257.
Full textTouvrey, Cédric. "Analyse de la recombinaison des gènes TCRAD : réarrangements radio-induits et structure des jonctions signal." Phd thesis, Université Joseph Fourier (Grenoble), 2005. http://tel.archives-ouvertes.fr/tel-00175283.
Full textLa différenciation radio-induite des thymocytes immatures s'accompagne du réarrangement de novo des gènes TCRA. L'étude des jonctions signal (JS) formées lors du réarrangement des gènes TCRA ne montre pas de différences de structure entre les JS de souris sauvages ou les JS formées suite à l'irradiation. Le réarrangement TCRA radio-induit est donc probablement l'œuvre de la machinerie de recombinaison traditionnelle. Contrairement au modèles actuels de recombinaison V(D)J les JS de souris sauvages analysées présentent des modifications, quels que soient les gènes réarrangés. Nous avons pu montrer une influence de plusieurs protéines impliquées dans la réparation de l'ADN et le maintient de la stabilité du génome sur la structure des JS. Nous proposons que ces modifications ne sont pas le résultat d'un processus de recombinaison aberrant mais constituent une propriété intrinsèque de la recombinaison.
Nos travaux permettent donc une meilleure compréhension des mécanismes moléculaires de la recombinaison V(D)J.
Cieslak, Agata. "Normal and pathological mechanisms of TCRα/δ locus rearrangement in thymic lymphopoiesis." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCB112.
Full textMaturation of T lymphoid cells is a highly regulated process where ordered thymic rearrangements at the TCRδ, TCRy, TCRβ and finally TCRα loci determine the development into either yδ or αβ T-cell lineages. Somatic rearrangements of V, (D), and J gene segments of TCR loci involve RAG1/2 proteins, RSS sequences juxtaposing V, D, and J genes segments and regulatory elements (enhancers) providing a cis-regulation of this process. The control of the V(D)J recombination is achieved through various mechanisms including epigenetic modifications, involvement of transcription factors and RSS conformation/sequence. In this work, we show that TCRδ rearrangements are strictly ordered in Humans. The first Dδ2-Dδ3 rearrangement occurs at ETP (Early T-Cell Precursor) stage CD34+/CD1a-/CD7+dim, and always precedes Dδ2-Jδ1 rearrangement. In-silico analysis of the locus identified a key binding site for a transcription factor RUNX1 in close proximity to the Dδ2-23RSS heptamer in human, but not in mice. The RUNX1 recruitment at this site in immature CD34+/CD3- thymocytes increases binding affinity of RAG1/2 proteins. This work identifies an original cofactor of human VDJ recombination. A set of comprehensive epigenetic analysis conducted within the Europeen Blueprint project on human thymic subpopulations allowed as to establish that the TCRα enhanceosome (Eα), as in mice, is already formed from the earliest stages of thymopoiesis without being able to be activated before the end of β-selection. Our preliminary results suggest that HOXA homeobox proteins (including HOXA9) suppress the activity of the Eα (thus TCRα rearrangements) by interacting with the transcription factor ETS1 via their homeodomains. Induced by β-selection HOXA repression results in the chromatin opening of the Vα/Jα gene segments through TCRα activation. These finding shed new light on the so far unexplained shift observed between the formation of Eα enhanceosome at a very immature stages and its activation at a much later developmental stages
Nguyen, Thuy Vy. "Role for Fanconi anemia pathway in immunoglobulin diversification." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112268.
Full textTo recognize and respond dynamically to an enormous variety of different pathogens, B lymphocytes of the immune system have evolved controlled genetic processes at their immunoglobulin (Ig) loci that are known as Ig diversification including V(D)J recombination, somatic hypermutation (SHM), and class switch recombination (CSR). These complex and vulnerable processes are orchestrated by multiple DNA repair pathways. Fanconi anemia (FA) is a rare genetic disorder that can lead to bone marrow failure, congenital abnormalities, and an increased risk of leukemia and cancer. FANC pathway has been implicated in DNA interstrands crosslinks (ICL) repair and in the rescue of stalled replication forks. The FANC pathway also plays a fundamental role in coordinating the DNA repair pathways. Several lines of evidence suggest a possible involvement of the FANC pathway in Ig diversification processes, thus we are particularly interested in revealing function of FANC pathway during these processes. By using Fanca-/- mice, our results first show that during V(D)J recombination, Fanca (or FANC pathway) participates to the control of the transition from pre-B to immature B cells in bone marrow (BM), probably through transcriptional activation of post-rearranged κ light chain. In addition, Fanca might play a role in nucleotide addition at coding end, possibly by regulating either TdT or Polµ activity/activation. Secondly, we found that Fanca is required for the induction of transition mutations at A/T during SHM via regulation of Polη expression/stabilization. Finally, Fanca (or FANC pathway) inhibits short-range recombination and is required during CSR to stabilize duplexes between 2 short microhomology regions that facilitate the recruitment of endonucleases to trim overhangs and avoid unscheduled access of polymerases to DNA ends
Quintart, Anne. "Mise au point d'un test de réparation des cassures double-brin de l'ADN, application au déficit immunitaire T(-) B(-) caractérisé par un défaut de recombinaison V(D)J avec radiosensibilité accrue." Paris 5, 2001. http://www.theses.fr/2001PA05P019.
Full textVera, Gabriella. "Défauts de la réparation de l’ADN et développement lymphoïde : Analyse de situations pathologiques chez l’homme et la souris." Thesis, Paris 5, 2012. http://www.theses.fr/2012PA05T028/document.
Full textThroughout their development, hematopoietic cells are exposed to many DNA damages of either exogenous or endogenous origin. Living organisms evolved a variety of DNA repair mechanisms in order to face those threats, and their impairment leads to rare but severe diseases in human. Of the two mechanisms involved in the repair of DNA double-strand break (DSB) repair, one plays a major role in mammal’s Immune System (IS). The non-homologous end joining (NHEJ) pathway is essential for the correct proceeding of V(D)J recombination in lymphocyte progenitors from bone marrow and thymus. Indeed, the formation of DNA DSB is a key step of the rearrangement. In similar fashion, though to a lesser degree, NHEJ is involved in repair of AID induced breaks during immunoglobulin class switch recombination (Ig-CSR). Our team previously identified a new NHEJ factor, Cernunnos (or XLF), as being responsible for a human syndrome of severe combined immunodeficiency (SCID) associated with ionizing radiation (IR) sensitivity (RS-SCID) and microcephaly. To better understand Cernunnos role in the hematopoietic system and particularly in lymphocyte development, we engineered a knock-out (KO) mouse model for this gene. Surprisingly, lymphocyte development is almost normal in these mice, the only defect observed being a decrease of lymphocyte number. However, a refined analysis of T cell repertoire allowed us to uncover a bias in the use of V and J segments from the receptor’s α chain (TCRα). This is the signature of a survival defect in thymocytes, caused by chronic activation of the p53 dependent apoptosis pathway in response to DNA damage. Some discrete T cell populations, such as iNKTs and MAITS, would be affected. In the meantime, our team pursues the uncovering of genetic diseases and their functional description in patients showing signs of immune or hematopoietic deficiency combined to impaired DNA repair. We focused on a patient harboring clinical signs of genomic instability and hematopoietic defects with strong evidence for genetic cause. Thanks to high-throughput DNA sequencing technology and whole genome association study (WGAS), we identified several mutations, one of them striking us as pertinent
Drouet, Jérôme. "Mobilisation de protéines de la voie de jonction d'extrémités non homologues en réponse aux cassures double-brin de l'ADN dans les cellules de mammifère." Toulouse 3, 2004. http://www.theses.fr/2004TOU30243.
Full textCells are constantly exposed to a variety of endogenic and exogenic factors likely to compromise their genome integrity. Among the various kinds of DNA lesions, double-strand breaks (DSB) are considered as the most cytotoxic damages due to potentially lethal, and possibly carcinogenic, effects. Facing this permanent danger, cells are equipped with adapted repairing enzymatic systems. The NHEJ (Non Homologous End Joining) is considered as the major DSB-repairing process in the case of superior eucaryotes. The precise biochemical mechanism used by the NHEJ is still not well known, and most of the present knowledge is based on in vitro experiments. In a first step, we have tested the physiological validity of the NHEJ biochemical model by an in vivo approach using optimized cell fractioning, based on a detergent-mediated extraction technique. We have confirmed the assembly of the major repairing complexes, DNA-PK and Xrcc4 / DNA ligase IV, in the presence of DSB in vivo, in several human cell lines. We have described for the first time a Xrcc4 recruitment, strictly dependent on the physical presence of DNA ligase IV, and we propose a model for the role of Xrcc4 phosphorylation on the optimized recruitment of DNA ligase IV in double-strand breakages. In addition, we observed a specific mobilization of the Xrcc4 / DNA ligase IV complex toward the nuclear matrix in response to DSB, and we propose that the nuclear matrix acts as a specialized DSB-repairing site exhibiting complex extremities. .
Haddad, Dania. "Elongation transcriptionnelle dans le locus des chaînes lourdes des immunoglobulines." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/950/.
Full textImmunoglobulin genes (Ig) undergo two types of intra-genic rearrangements: V(D)J recombination in early developing B cells which is antigen-independent and class switch recombination (CSR), specific to the heavy chains locus, which may occur after antigen encounter. These two processes contribute to the extreme diversity of antibodies and the strength of the immune response. At the cellular level, CSR translates the transition from IgM-expressing B cells to B cells expressing IgE, IgA or one of the four sub-classes of IgG. At the molecular level, CSR is mediated by special sequences called switch regions (S). CSR is preceded by germline (GL) transcription of target S sequences. In a first study, we have replaced in a mouse line the intron Iµ-Cµ by NeoR gene. The mutation led to a drastic block in B cell development. However, V(D)J rearrangements was normal. Transcripts' analysis revealed complex interactions between transcriptional enhancers of the IgH locus that depend on the B cell developmental stage and activation status. In a second study, we analyzed the transcriptional elongation through Sµ and Sgamma3 sequences in two murine models in which elongation was altered by the insertion of a polyadenylation and transcriptional pause sites upstream of Sµ or Sgamma3. GL transcription of Sgamma3 was abrogated despite normal initiation. CSR to IgG3 was totally and specifically blocked. In contrast, GL transcription through Sµ region and CSR to different isotypes was only diminished. Our results show that elongation through Sµ and Sgamma3 is differentially regulated in vivo and suggest different capacities of IgH transcriptional enhancers to control elongation through IgH locus
NGUYEN, QUANG TRI. "Ontogenese des lymphocytes b chez la souris : aspects de la regulation de la transcription du gene de chaine lourde d'immunoglobuline, de la recombinaison v(d)j et de l'expression de la terminale deoxynucleotidyl transferase (tdt)." Paris 7, 2000. http://www.theses.fr/2000PA077166.
Full textMathieu, Noëlle. "Etude in vivo de la fonction de l'élément enhancer du gène TCRβ : Rôle sur la structure de la chromatine, l'expression et les recombinaisons V(D)J au locus TCRβ." Aix-Marseille 2, 2000. http://www.theses.fr/2000AIX22067.
Full textDadi, Saida. "Blocage de maturation thymique et aberration des recombinaisons V(D)J : modèle des Leucémies Aigües Lymphoblastiques de la lignée T exprimant les onco-protéines à homéodomaines TLX1 et TLX3." Thesis, Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX22029/document.
Full textAcute lymphoblastic leukemias (ALL) are characterized by multi-step oncogenic processesleading to a cell differentiation arrest. Improved understanding of the underlying molecular mechanisms is a prerequisite for targeted therapeutic approaches. In T lineage ALLs, over expressionof the orphan homeobox factors, TLX1 or TLX3 is associated with a corticalthymic maturation arrest. We demonstrate that both TLX1 and TLX3 proteins interact withETS1, an essential component of the TCRα gene-enhanceosome, resulting in repression ofenhancer activity, blocked TCR-Jα rearrangement, and auto-extinction of clones with a TCRαenhancer driven TLX1-TCRδ chromosomal translocation. Our results identify novel functionsfor homeodomain proteins during T-cell development and imply that TLX1/3 exert an ETS1-dependent block to αβ T-cell maturation in T-ALLs, there fore representing promising targets for differentiation therapy
Thuderoz, Florence. "Modélisation des réarrangements V[alpha]-J[alpha] du TRA/TRD chez la souris et chez l'homme." Grenoble 1, 2010. https://theses.hal.science/tel-01316954.
Full textChovanec, Peter. "Studies of B cell development and V(D)J recombination." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288271.
Full textRiedel, Frank [Verfasser], Fritz-V. [Gutachter] Kohl, H. J. [Gutachter] Peter, and J. [Gutachter] Witte. "Prävalenz schlafbezogener Atmungsstörungen bei Herzschrittmacherpatienten / Frank Riedel ; Gutachter: Fritz-V. Kohl, H. J. Peter, J. Witte." Berlin : Humboldt-Universität zu Berlin, 1998. http://d-nb.info/1207641383/34.
Full textSimonet, Maria-Ana. "Modélisation des réarrangements V(D)J au niveau du locus TRA/TRD." Grenoble 1, 2008. http://www.theses.fr/2008GRE10302.
Full textT lymphocytes express at their surface an antigen receptor composed by a~ or y8 chains. A TCRa chains are encoded by a variable (V), ajoining (J) and a constant (C) segments which are under the of the control of a specific recombination mechanism called "V(D)J recombination". The VJ combinatorial diversity is unknown and the current state of molecular technology does not allow us to perform an analysis of aIl putative VJ combination or to estimate the frequencies of the functional VJ in mice. To overcome this difficulty we defined a mathematical model fitting experimental data. This model gives new insights on the mIes controlling the use of the V and the J genes and provides a dynamic ca1culation of the VJ combinations. The model proposes an accessibility of the TRAlTRD locus by sûccessive windows of different sizes and with different speed of progression. Furthermore, a possibility of successive secondary rearrangements was introduced. Ln parallel, an experimental analysis of the VJ combination has been performed in humans. From this analysis, the VJ combination profiles are ca1culated and used to validate our simulation program. Ln the future, the model may be use to analysis the variations between sound or altered repertoire
Mensch, Kyna. "A study of V(D)J recombination and DNA-damage response factors." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27643.
Full textLopes, Luiz Fernando. "Instabilidade genica mediada pela V(D)J-recombinase e a presença do gene hibrido V gama/J beta em pacientes pediatricos oncologicos expostos a quimioterapia." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/309700.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
Made available in DSpace on 2018-07-31T15:08:23Z (GMT). No. of bitstreams: 1 Lopes_LuizFernando_D.pdf: 20884404 bytes, checksum: 5073c7c7a170b4c793430172ec387443 (MD5) Previous issue date: 2001
Resumo: No presente estudo foi investigado um tipo de instabilidade específica dos linfócitos que, segundo dados de literatura, pode estar relacionado com o desenvolvimento de neoplasias "de novo" ou associadas ao aparecimento de neoplasias secundárias. Esta instabilidade estudada é definida através da freqüência de rearranjos que ocorrem entre o segmento V no receptor de células T no locus gamma (7p14-15) e do segmento J do receptor de células T no locus beta (7q 35). Desta forma, os objetivos deste estudo foram: 1) utilizando o gene lnorido Vy/JJ3como marcador, estudar a instabilidade gênica induzida pela quimioterapia antineoplásica em pacientes pediátricos portadores de leucemia linfocítica aguda ou tumores sólidos; 2) estudar o grau de reversibilidade desta instabilidade após o final da exposição aos agentes quimioterápicos e 3) demonstrar a validade da abordagem de estudo da recombinação, avaliando os produtos da "nested PCR" de DNA genômico dos pacientes em gel de poliacrilamida, posteriormente revelado pela prata (abordagem ainda não descrita na literatura para o estudo do gene em questão). Foram analisadas 210 amostras de DNA de indivíduos agrupados desta maneira: sem neoplasia- 30 indivíduos, 90 pacientes com LLA ( 15 pré Qt, 15 com QT 3-6 meses e 15 com 9 a 12 meses, 15 pacientes após término entre 6 e 12 m, 15 após 2 a 4 anos e 15 após 5 anos ou mais) e 90 pacientes com Tumor Sólido, também subagrupados da mesma forma que os pacientes com LLA. Todos os 210 pacientes foram classificados com resultado positivo ou negativo para o rearranjo, de acordo com a presença ou ausência da banda esperada após a segunda PCR Para cada indivíduo foram estudadas 6 diferentes quantidades de DNA (525ng, 350,175,35,17.4, e 8.75) e, em cada uma delas, chamamos de positivo ou negativo para o rearranjo de acordo com 'a presença ou ausência da banda visualizada no gel revelado. Foi determinada a média da freqüência do rearranjo Vy/Jp para cada grupo. O grupo de pacientes durante a quimioterapia foi comparado com a média da freqüência dos rearranjos pré e pós-quimioterapia separadamente para o grupo de LLA e TS. As médias foram comparadas utilizando-se o teste de Kruskal-Wallis. As comparações múltiplas foram feitas através do método Tukey-HSD. A média da fteqüência de rearranjos foi de 10,2/105 células para os pacientes com LLA que estavam expostos aos quimioterápicos no período de 3 a 6 meses e para o grupo em tratamento entre 9 a 12 meses foi de 13,8/105. Para o grupo controle (30 indivíduos) e para o grupo com LLA pré-tratamento os valores foram 1,3/105e 3,11105. O estudo estatístico comparando grupos -controle, LLA pré-QT e LLA durante QT - mostrou tratar-se de valores altamente significativos (p < 0,001). No grupo de pacientes com Tumor Sólido, a média da freqüência de rearranjos durante o tratamento foi de 9,2 e 9,11105 células respectivamente para 3 a 6 meses de tratamento e 9 a 12 meses. O grupo controle, sem neoplasia, foi o mesmo descrito acima e a média de rearranjo foi de 1,3/105 e para os TS pré-quimioterapia foi de 0,6/105 células. Novamente o estudo estatístico comparando grupos -controle, TS pré QT e TS durante QTmostrou tratar-se de valores altamente significativos(p < 0,002). Desta forma pode-se concluir que: 1) o método utilizando gel de poliacrilamida corado pela prata pode ser substituído pelo gel de agarose corado com brometo de etídio e hibridizado pela técnica de Southem Blot, sem prejuízo dos resultados e com a vantagem de ser mais rápido, de menor custo e da não-necessidade de utilização de material radioativo e 2) os resultados do estudo indicam que os pacientes apresentaram instabilidade gênica onde a presença do gene ln'brido Vy/Jf3pôde ser observada em freqüência mais elevada durante a fase de tratamento com quimioterapia
Abstract: The ftequency of the hybrid Vy/J[3 trans-rearrangement in peripheral blood lymphocytes (PBL) was analysed in a transversal study of pediatric patients (n=210) with acute lymphoblastic leukemia (ALL) and solid tumours (ST). DifIerent amounts of DNA were used as template for a nested PCR in order to evaluate the ftequency ofhybrid Vy/J[3 genes, using silver-stained gels. The ftequency of the rearrangement was evaluated in groups before, during and afier therapy. A great1y increased ftequency of Vy/J[3transrearrangement was found in PBL of both groups of patients during exposure to chemotherapeutic agents as compared to patients before chemotherapy. In patients that had finished treatment, the ftequency of the rearrangement feUprompt1yto the baseline levels in ST but showed a slow decrease in ALL, where increased levels could be found until 4 years afier the end oftreatment. We hypothesize that the chemotherapeutic agents are able to induce the Vy/J[3trans-rearrangement, but this is transient in most cases. It remains to be determined the exact relation between the persistence of the rearrangement and the occurrence of secondary leukemia
Doutorado
Clinica Medica
Doutor em Clínica Médica
Haque, Syeda Farhana Yasmin. "The role of transcription factors in the regulation of V(D)J recombination." Thesis, Institute of Cancer Research (University Of London), 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444162.
Full textBevington, Sarah Louise. "The mechanism of enhancer mediated long-range chromatin activation during V(D)J recombination." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539709.
Full textScott, James Nigel Frederyck. "Long range interactions regulate V(D)J recombination at the murine immunoglobulin lambda locus." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/16643/.
Full textGläßle, Benjamin Simon [Verfasser], G. [Akademischer Betreuer] Bali, V. [Akademischer Betreuer] Braun, and J. [Akademischer Betreuer] Schliemann. "Electromagnetic corrections to pseudoscalar decay constants / Benjamin Simon Gläßle ; G. Bali, V. Braun, J. Schliemann." Regensburg : Universitätsbibliothek Regensburg, 2017. http://d-nb.info/1128902893/34.
Full textWeikert, Christian [Verfasser]. "Die Bedeutung des NHEJ-Faktors PAXX im Prozess der V(D)J-Rekombination / Christian Weikert." Ulm : Universität Ulm, 2019. http://d-nb.info/1200994213/34.
Full textSmith, Alastair Luke. "Development of a novel system to investigate the temporal regulation of V(D)J recombination." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22856/.
Full textZheng, Xiuzhong. "Definition of Ku-interacting domains in RAG1 and RAG2 proteins in V(D)J recombination." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27102.
Full textVlasov, Katja [Verfasser], G. V. [Akademischer Betreuer] Röschenthaler, and H. J. [Akademischer Betreuer] Breunig. "Neue fluorierte Sulfonate, Amine und Phosphonate. Synthese und mögliche Anwendungen / Katja Vlasov. Gutachter: G.-V. Röschenthaler ; H. J. Breunig. Betreuer: G.-V. Röschenthaler." Bremen : Staats- und Universitätsbibliothek Bremen, 2011. http://d-nb.info/1072487640/34.
Full textKonys, J. [Verfasser]. "Untersuchungen zur Korrosion des Vanadiums und der Legierung V 3Ti 1Si in stroemendem Lithium / J. Konys." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/119657765X/34.
Full textVesprini, Danny. "Illegitimate V(D)J rearrangement in ã-irradiation induced T cell lymphoma in newborn scid mice." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29263.pdf.
Full textMauvieux, Laurent. "Accessibilité à l'ADN de la recombinase V(D)J : le locus TCR alpha/delta comme modèle." Paris 5, 2002. http://www.theses.fr/2002PA05N108.
Full textThe diversity of antigen receptors is composed from the recombination of their V, D and J segments. The mecanisms underlying the regulation of the recombination are poorly understood, but rely on the accessibility of the DNA to the V(D)J recombinase. We showed in this work that the two T cell receptors TCR J alpha are not randomly, but rather coincidentally rearranged in a given T cell. This coincidence relies, in part, on the presence of <> (TEA), a cis regulatorygenetic element located upstream of the TCRJA cluster
Sukhov, Alexander [Verfasser], J. [Akademischer Betreuer] Berakdar, S. [Akademischer Betreuer] Trimper, and V. K. [Akademischer Betreuer] Dugaev. "Ultrafast switching and control of nanoparticles' magnetization / Alexander Sukhov. Betreuer: J. Berakdar ; S. Trimper ; V. K. Dugaev." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2009. http://d-nb.info/1024874311/34.
Full textXiao, Zheng [Verfasser]. "Development and application of a novel in vivo EGFP based V(D)J recombination assay / Zheng Xiao." Ulm : Universität Ulm. Medizinische Fakultät, 2002. http://d-nb.info/1015324711/34.
Full textBalagopal, V. Aswathi [Verfasser], and J. [Akademischer Betreuer] Blümer. "A Quest for PeVatrons Employing Radio Detection of Extensive Air Showers / Aswathi Balagopal V. ; Betreuer: J. Blümer." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1179963865/34.
Full textMetzger, Sebastian J. [Verfasser]. "Hochdruckmodifikationen von Oxoarsenaten(V) und Oxoarsenaten(III) der Selten-Erd-Metalle und Lithium-Mangan-Eisen-Oxophosphat(V) als Kathodenmaterial für Lithium-Akkumulatoren / Sebastian J. Metzger." München : Verlag Dr. Hut, 2013. http://d-nb.info/1037286952/34.
Full textBüttner, Maren [Verfasser], Fabian J. [Akademischer Betreuer] Theis, Julien [Gutachter] Gagneur, Fabian J. [Gutachter] Theis, and Peter V. [Gutachter] Kharchenko. "Statistical data integration for single-cell RNA-sequencing - batch effect correction and lineage inference / Maren Büttner ; Gutachter: Julien Gagneur, Fabian J. Theis, Peter V. Kharchenko ; Betreuer: Fabian J. Theis." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/119244194X/34.
Full textSchmidt, Bernhard V. K. J. [Verfasser], and Markus [Akademischer Betreuer] Antonietti. "Polymers, self-assembly and materials : from polymer synthesis to applications / Bernhard V. K. J. Schmidt ; Betreuer: Markus Antonietti." Potsdam : Universität Potsdam, 2020. http://d-nb.info/1223980855/34.
Full textMaiwald, Martin Maximilian [Verfasser], and Petra J. [Akademischer Betreuer] Panak. "Spektroskopische Speziation und thermodynamische Charakterisierung der Komplexierung des Np(V)-Ions / Martin Maximilian Maiwald ; Betreuer: Petra J. Panak." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1191758508/34.
Full textBenesch, Ute Sybille [Verfasser], J. [Akademischer Betreuer] Dittmer, N. [Akademischer Betreuer] Arnold, and V. [Akademischer Betreuer] Müller. "Der 4G/5G-PAI-1-Polymorphismus beim primären Mammakarzinom / Ute Sybille Benesch ; J. Dittmer, N. Arnold, V. Müller." Halle, 2016. http://d-nb.info/1116952491/34.
Full textMaiwald, Martin M. [Verfasser], and Petra J. [Akademischer Betreuer] Panak. "Spektroskopische Speziation und thermodynamische Charakterisierung der Komplexierung des Np(V)-Ions / Martin Maximilian Maiwald ; Betreuer: Petra J. Panak." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1191758508/34.
Full textMaiwald, Martin M. [Verfasser], and Petra [Akademischer Betreuer] Panak. "Spektroskopische Speziation und thermodynamische Charakterisierung der Komplexierung des Np(V)-Ions / Martin Maximilian Maiwald ; Betreuer: Petra J. Panak." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1191758508/34.
Full textStephanus, Christine. "Identification du manuscrit D-Bds Mus. Ms. Autogr. J. V. Meder 1 : prélude à une édition critique." Paris 4, 2002. http://www.theses.fr/2002PA040197.
Full textThis doctoral thesis is dedicated to a manuscript belonging to the Berlin National Library : D-Bds Mus. Ms. Autogr. J. V. Meder 1. Although it is classified among highly valuable sources since 1850, this score of a St. Matthew Oratorio-Passion hasn't been the subject of any research yet. Though, the title page being lost, the composer as well as the composition place and date of the unique remaining source were unknown. Basing on the analysis of the source (paper, inks and handwritings), this thesis sets out how the three versions forming this manuscript have been updated. Considering that the Passion has been performed in Riga throughout the 18th century, the study of the historical context of the work in that city, revealed as the actual place of composition by the watermarks, allowed to determine the meaning of the apocryphal versions in comparison to the original one. Lastly, the analysis of the materials characteristics in the perspective of the sources of that time, as well as the dating of the chorals melodies in the manuscript, permitted the final identification of the Actus Musicus de Passione Jesu Christi, composed by Johann Valentin Meder in 1716. This research restores to favour a Passion that is wrongly identified and edited in current publications (MGG, New Grove or Das Chorwerk edition), making it therefore the prelude to a critical edition
Cui, Bo. "Integration of NHEJ into V(D)J recombination via Ku7080 binding to the RSS heptamer and RAG12." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29090.
Full textHaßfeld, Sabine Verfasser], G. [Gutachter] Nickenig, J. [Gutachter] Holtz, and Vera [Gutachter] [Regitz-Zagrosek. "Rolle von Cardiotrophin-1 für die Pathogenese von Kardiomyopathien / Sabine Haßfeld ; Gutachter: G. Nickenig, J. Holtz, V. Regitz-Zagrosek." Berlin : Humboldt-Universität zu Berlin, 2004. http://d-nb.info/1207645443/34.
Full textTschisgale, Silvio [Verfasser], J. [Gutachter] Fröhlich, and V. [Gutachter] Ulbricht. "A numerical method for fluid-structure interactions of slender rods in turbulent flow / Silvio Tschisgale ; Gutachter: J. Fröhlich, V. Ulbricht." Dresden : TUDpress - Thelem Universitätsverlag, 2020. http://d-nb.info/1227833687/34.
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