Academic literature on the topic 'KIT proto-oncogene'

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Journal articles on the topic "KIT proto-oncogene"

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Ikeda, H., Y. Kanakura, T. Tamaki, A. Kuriu, H. Kitayama, J. Ishikawa, Y. Kanayama, T. Yonezawa, S. Tarui, and JD Griffin. "Expression and functional role of the proto-oncogene c-kit in acute myeloblastic leukemia cells." Blood 78, no. 11 (December 1, 1991): 2962–68. http://dx.doi.org/10.1182/blood.v78.11.2962.2962.

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Abstract The c-kit proto-oncogene encodes a receptor tyrosine kinase that is thought to play an important role in hematopoiesis. In a series of human acute myeloblastic leukemia (AML), the expression of the c-kit proto-oncogene and its product was studied by means of Northern blot and immunoblot analyses. The c-kit mRNA was expressed in 20 of 25 cases of AML, and in those cases the product of the c-kit proto-oncogene was detected by immunoblotting with anti-c-kit antibody. The expression of c-kit transcripts and protein was barely detectable in normal bone marrow cells as a control. The expression of c-kit transcript did not correlate with the French-American-British classification nor clinical manifestations. In 6 of 11 cases that expressed c-kit product, AML cells were found to proliferate in response to recombinant human stem cell factor (rhSCF), the ligand for c-kit, and the synergistic stimulation of AML cells was observed by rhSCF and granulocyte- macrophage colony-stimulating factor. Immunoblotting with anti- phosphotyrosine antibody showed that the c-kit receptor protein was detectably phosphorylated in 7 of 12 cases tested before the stimulation with rhSCF, while the rhSCF treatment resulted in an increased tyrosine phosphorylation of c-kit in AML cells. These results indicate that c-kit proto-oncogene is expressed in most cases of AML and is functional in terms of supporting proliferation.
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Ikeda, H., Y. Kanakura, T. Tamaki, A. Kuriu, H. Kitayama, J. Ishikawa, Y. Kanayama, T. Yonezawa, S. Tarui, and JD Griffin. "Expression and functional role of the proto-oncogene c-kit in acute myeloblastic leukemia cells." Blood 78, no. 11 (December 1, 1991): 2962–68. http://dx.doi.org/10.1182/blood.v78.11.2962.bloodjournal78112962.

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The c-kit proto-oncogene encodes a receptor tyrosine kinase that is thought to play an important role in hematopoiesis. In a series of human acute myeloblastic leukemia (AML), the expression of the c-kit proto-oncogene and its product was studied by means of Northern blot and immunoblot analyses. The c-kit mRNA was expressed in 20 of 25 cases of AML, and in those cases the product of the c-kit proto-oncogene was detected by immunoblotting with anti-c-kit antibody. The expression of c-kit transcripts and protein was barely detectable in normal bone marrow cells as a control. The expression of c-kit transcript did not correlate with the French-American-British classification nor clinical manifestations. In 6 of 11 cases that expressed c-kit product, AML cells were found to proliferate in response to recombinant human stem cell factor (rhSCF), the ligand for c-kit, and the synergistic stimulation of AML cells was observed by rhSCF and granulocyte- macrophage colony-stimulating factor. Immunoblotting with anti- phosphotyrosine antibody showed that the c-kit receptor protein was detectably phosphorylated in 7 of 12 cases tested before the stimulation with rhSCF, while the rhSCF treatment resulted in an increased tyrosine phosphorylation of c-kit in AML cells. These results indicate that c-kit proto-oncogene is expressed in most cases of AML and is functional in terms of supporting proliferation.
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Takayuki, Kubota, Hikono Hirokazu, Sasaki Erika, and Sakurai Michiharu. "Sequence of a bovine c-kit proto-oncogene cDNA." Gene 141, no. 2 (April 1994): 305–6. http://dx.doi.org/10.1016/0378-1119(94)90592-4.

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Vučićević, Ivana, Darko Marinković, Vladimir Kukolj, Miloš Vučićević, Milorad Mirilović, Slađan Nešić, and Sanja Aleksić-Kovačević. "Kit Receptor Expression in Canine Cutaneous Mast Cell Tumors (CMCTs) Without C-Kit Mutation." Acta Veterinaria 66, no. 2 (June 1, 2016): 222–33. http://dx.doi.org/10.1515/acve-2016-0019.

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Abstract Histopathological examination, grading, immunohistochemical staining and molecular genetic examinations are the proposed criteria that should be used for cutaneous mast cell tumors (CMCTs) classification. The presence of aberrant CD117 expression and mutations of the c-kit proto-oncogene could be an indicative parameter for final histological grading. Determination of the connection between the localization of KIT receptor expression and the histological grade of CMCTs without c-kit proto-oncogene mutations was the main goal of this study. The study included twenty four CMCTs and six control skin samples from 30 dogs of different ages, breed and sex. Formalinfixed and paraffin-embedded tissue samples were stained with hematoxylin-eosin and toluidine blue and immunohistochemically tested for CD117 expression. DNA was extracted from the same paraffin blocks and subsequent polymerase chain reaction amplification was performed using PE1 and PE2 primers. Degree of malignancy was determined based on the presence of mitotic figures, multinucleated cells, bizarre nuclei and karyomegaly in 10 high power fields. Based on histological features, fourteen of 24 CMCTs were of a high histological grade, while ten were classified as a lowgrade malignancy. CD117 cytoplasmic expression was observed in nine of fourteen high-grade malignancy CMCTs, which confirms the link between the aberrant CD117 expression and increased cell proliferation.
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Graphodatsky, Alexander S., Anna V. Kukekova, Dmitry V. Yudkin, Vladimir A. Trifonov, Nadezhda V. Vorobieva, Violetta R. Beklemisheva, Polina L. Perelman, et al. "The proto-oncogene C-KIT maps to canid B-chromosomes." Chromosome Research 13, no. 2 (February 2005): 113–22. http://dx.doi.org/10.1007/s10577-005-7474-9.

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Yared, Marwan A., Lavinia P. Middleton, Funda Meric Bernstam, Massimo Cristofanilli, and Aysegul A. Sahin. "Expression of c-kit Proto-Oncogene Product in Breast Tissue." Breast Journal 10, no. 4 (July 2004): 323–27. http://dx.doi.org/10.1111/j.1075-122x.2004.21351.x.

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Syrris, Petros, Kirsten Heathcote, Romeo Carrozzo, Koen Devriendt, Nursel Elçioglu, Christine Garrett, Meriel McEntagart, and Nicholas D. Carter. "Human piebaldism: six novel mutations of the proto-oncogene KIT." Human Mutation 20, no. 3 (August 21, 2002): 234. http://dx.doi.org/10.1002/humu.9057.

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Erika, Sasaki, Okamura Hiroshi, Chikamune Tateki, Kanai Yukio, Watanabe Miho, Naito Mitsuru, and Sakurai Michiharu. "Cloning and expression of the chicken c-kit proto-oncogene." Gene 128, no. 2 (June 1993): 257–61. http://dx.doi.org/10.1016/0378-1119(93)90571-j.

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Williams, Douglas E., June Eisenman, Allison Baird, Charles Rauch, Kirk Van Ness, Carl J. March, Linda S. Park, et al. "Identification of a ligand for the c-kit proto-oncogene." Cell 63, no. 1 (October 1990): 167–74. http://dx.doi.org/10.1016/0092-8674(90)90297-r.

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Catlett, JP, JA Leftwich, EH Westin, S. Grant, and TF Huff. "c-kit expression by CD34+ bone marrow progenitors and inhibition of response to recombinant human interleukin-3 following exposure to c-kit antisense oligonucleotides." Blood 78, no. 12 (December 15, 1991): 3186–91. http://dx.doi.org/10.1182/blood.v78.12.3186.bloodjournal78123186.

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The c-kit proto-oncogene encodes a receptor having tyrosine-specific kinase activity and has been mapped to chromosome 4 in the human and chromosome 5 in the mouse, at the dominant white spotting locus (W). Mutations at the W locus affect various aspects of murine hematopoiesis. The c-kit proto-oncogene has been shown to be expressed by leukemic myeloblasts, but not by normal unseparated human bone marrow cells. The role of this oncogene in differentiation and proliferation of human hematopoietic progenitors is presently undefined. To determine c-kit expression by normal hematopoietic progenitors, CD34+ cells were isolated from disease-free human bone marrow, and RNA-based polymerase chain reaction (PCR) techniques were used to assess expression. By this method, we have demonstrated c-kit expression by CD34+ bone marrow progenitors. To address the functional requirement for c-kit expression in normal human hematopoiesis, CD34+ cells were incubated in the presence of sense, antisense, or missense oligonucleotides to c-kit, and subsequently cultured in the presence of either recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) or recombinant human interleukin-3 (rhIL-3). Exposure of CD34+ cells to c-kit antisense oligonucleotides significantly inhibited colony-forming ability of cells cultured in the presence of rhIL-3, but had no effect on colony formation of cells cultured in rhGM- CSF. Together, these data suggest a possible role for c-kit in hematopoietic proliferation and differentiation that may be linked to some, but not all, stimulatory factors.
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Dissertations / Theses on the topic "KIT proto-oncogene"

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Qiu, Fei-Hua. "Proto-oncogene c-kit : structure and relationship to the transmembrane receptor kinases /." Access full-text from WCMC, 1989. http://proquest.umi.com/pqdweb?did=744572251&sid=1&Fmt=2&clientId=8424&RQT=309&VName=PQD.

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Gari, Mamdooh Abdullah Mahmoud. "Pathogenesis of c-kit proto-oncogene mutations in acute and chronic myeloproliferative disorders." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341830.

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Wang, Hong. "The proto-oncogene c-Kit inhibits tumor growth by behaving as a dependence receptor." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1172/document.

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C-Kit est généralement considéré comme un récepteur à tyrosine kinase et comme un proto-oncogène, dont la surexpression et la mutation conduisent à une progression tumorale médiée par son activité kinase. En clinique, les traitements ciblant l’activité kinase de c-Kit, comme l’Imatinib (Gleevec), ont été largement utilisés pour traiter les patients atteints de maladies liées à c-Kit. Alors que le rôle de c-Kit comme proto-oncogène ne fait aucun doute, certaines études et analyses de bases de données diffèrent avec l’idée d’un rôle pro-tumoral de c-Kit, laissant penser à un rôle différent de c-Kit dans le cancer. Ici, nous montrons que c-Kit appartient à la famille des récepteurs à dépendance, de la même façon que d’autres récepteurs de la famille des tyrosine kinases tel que MET, RET et TrkC. En absence de son ligand Stem Cell Factor (SCF), au lieu de rester inactif, c-Kit déclenche l’apoptose, qui peut être renforcée par l’invalidation de son activité kinase. En parallèle, nous montrons que c-Kit est capable de se lier à la caspase-9 et de l’activer. De plus, à la manière d’autres récepteurs à dépendance, c-Kit est aussi clivé par des protéases de type caspase sur son résidu acide aspartique D816, qui est nécessaire à son activité pro-apoptotique. La mutation du site D816 inhibe l’interaction entre c-kit et la caspase-9 et invalide l’activité pro-apoptotique de c-Kit. De façon intéressante, la mutation D816 est l’une des mutations les plus communes de ce récepteur dans la plupart des cancers liés à c-Kit, et cette mutation favorise la résistance au traitement Gleevec. Nous montrons aussi que la surexpression de c-Kit invalidé pour son activité kinase est capable d’inhiber la croissance tumorale dans des modèles animaux, alors que la mutation du site D816 empêche son effet suppresseur de tumeur. En outre, nous avons développé un outil permettant de bloquer l’interaction entre SCF et c-Kit, déclenchant l’activité pro-apoptotique de c-Kit dans les cancers positifs pour ce récepteur. En utilisant l’activité pro-apoptotique de c-Kit, en combinaison avec des inhibiteurs de kinases comme le Gleevec, nous proposons une nouvelle stratégie thérapeutique. En conclusion, nous démontrons que c-Kit est un membre de la famille des récepteurs à dépendance, présentant une activité pro-apoptotique, et pouvant être utilisé comme un outil alternatif dans le cadre d’un traitement contre le cancer
C-Kit has been generally considered as a receptor tyrosine kinase and a proto-oncogene, whose upregulation and mutation lead to tumor progression through its kinase activity. Clinically, drugs targeting the kinase activity of c-Kit, such as Imatinib (Gleevec), have been wildly used to treat patients with c-Kit related diseases. While the role of c-Kit as a proto-oncogene is of no doubt, some research reports and database analysis do not fit well the tumor promoting role of c-Kit, indicating a possible different role of c-Kit in cancer. Here, we show that c-Kit belongs to the dependence receptor family, similarly to other receptor tyrosine kinases such as MET, RET and TrkC. In the absent of its ligand SCF (stem cell factor), instead of staying inactive, c-Kit triggers apoptosis, which can be enhanced by silencing its kinase activity. Besides, we have shown that c-Kit is able to bind and activate caspase-9. Moreover, similarly to other dependence receptors, c-Kit is also cleaved by caspases-like protease at aspartic acid residue D816, which is crucial for its pro-apoptotic activity. The mutation of D816 site inhibits the c-Kit/caspase-9 binding and silences the pro-apoptotic activity of c-Kit. Of interest, c-Kit D816 mutation is one of the most common mutation of this receptor in many c-Kit related cancers and it promotes resistance against Gleevec treatment. We also show that overexpression of kinase mutated c-Kit is able to inhibit tumor growth in animal models, while the mutation of D816 site impairs the tumor suppressing activity. Furthermore, we develop a tool to block the SCF/c-Kit interaction, which unleashes the pro-apoptotic activity of c-Kit in cancers expressing this receptor. By using the pro-apoptotic activity of c-Kit, in combination with kinase inhibitors like Gleevec, we propose a novel therapeutic strategy. In conclusion, we demonstrate that c-Kit is a member of dependence receptor family, harboring intrinsic pro-apoptotic activity, which can be used as an alternative tool in cancer treatment
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Chui, Chung-hin, and 徐宗憲. "Molecular characterization of C-KIT proto-oncogene in Hong Kong leukemia patients: 'culprit or bystander'." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31236790.

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Chui, Chung-hin. "Molecular characterization of C-KIT proto-oncogene in Hong Kong leukemia patients : 'culprit or bystander' /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1947037X.

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Estrozi, Bruna. "Avaliação anatomoclínica e molecular do melanoma cutâneo em pacientes jovens (idade 18-30 anos)." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/5/5144/tde-01042015-144721/.

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A incidência do melanoma cutâneo em pacientes adultos jovens tem aumentado consideravelmente nos últimos anos. Há, contudo, carência de conhecimentos clinicopatológicos e moleculares sobre os melanomas que ocorrem nessa faixa etária. O presente estudo teve por objetivo avaliar 132 casos de melanoma cutâneo primário em pacientes com idade entre 18 e 30 anos, com ênfase no estudo das características clínicas, histopatológicas e avaliação molecular das mutações nos genes BRAF, NRAS e KIT. Em relação aos achados clínicos e histopatológicos, houve predomínio de indivíduos do sexo feminino (61,4%), sendo o tronco o sítio anatômico mais comumente envolvido (44,3%) e o melanoma extensivo superficial o tipo histológico predominante (79,5%). A mutação V600E no gene BRAF (BRAFV600E) foi analisada em 93 casos, utilizando-se a técnica de RT-PCR. Essa mutação foi identificada em 38,7% (36/93) e, estatisticamente, associada à fase vertical de crescimento (p = 0,01), infiltrado inflamatório discreto (p = 0,02) e presença de mitose intradérmica (p = 0,004). Houve, ainda, forte indício de associação com a presença de ulceração (p = 0,05). Todas essas variáveis apresentaram associação com pior prognóstico do melanoma cutâneo. Observou-se predomínio da mutação BRAFV600E em regiões anatômicas relacionadas à exposição solar intermitente. Nenhum caso de melanoma com fenômeno de regressão apresentou mutação BRAFV600E (p < 0,05). Não houve associação significativa entre BRAFV600E e sexo, tipo histológico, nível de Clark, índice de Breslow, elastose solar, invasão angiolinfática e perineural, satelitose, nevo melanocítico coexistente e sobrevida. A pesquisa de mutações NRAS, pela técnica de RT-PCR, detectou frequência de 3,95% (3/76). As três mutações encontradas foram do tipo 61K e ocorreram em pacientes do sexo masculino e em região de cabeça e pescoço. As mutações BRAFV600E e NRAS, quando presentes, eram mutuamente exclusivas. A frequência de mutações KIT, analisadas por sequenciamento, foi de 11,1% (3/27). As três mutações identificadas estavam localizadas no éxon 9 (G510, G498S e 489I). Houve concomitância de casos com mutação KIT tanto com NRAS, como com BRAFV600E. Devido ao pequeno número de casos com mutação em KIT e NRAS, não foi possível estabelecer correlações clínicas e histopatológicas com esses genes. Este estudo é o primeiro a descrever as mutações G510D e G498S no gene KIT em melanomas cutâneos. No presente estudo, a mutação BRAFV600E, em melanomas cutâneos de adultos jovens, correlacionou-se com características anatomoclínicas de pior prognóstico em relação aos melanomas selvagens para BRAFV600E
The incidence of cutaneous melanoma in young adults has dramatically increased in recent years. However, there is scarce data about the clinicopathological and molecular characteristics on the melanomas occurring at this age group. The present study aimed to evaluate 132 patients aged between 18 and 30 years with primary cutaneous melanoma with emphasis on the study of clinical, histopathological characteristics and molecular evaluation of mutations in BRAF, NRAS and KIT genes. Regarding the clinical and histopathological findings, the following results were found: female predominance (61.4%), trunk was the most commonly anatomical site involved (44.3%) and superficial spreading melanoma, was the most common histological type (79.5 %). The V600E mutation in BRAF (BRAFV600E) gene was analyzed in 93 cases, using RT-PCR. It was present in 38.7% (36/93) and statistically related to the vertical growth phase (p = 0.01), mild inflammatory infiltration (p = 0.02) and the presence of intradermal mitosis (p = 0.004). There was, also, strongly evidence of an association with the presence of ulceration (p = 0.05). Worse prognosis was associated with these variables. There was a predominance of BRAFV600E mutation in anatomical regions related to intermittent sun exposure. No cases of melanoma with BRAFV600E mutation showed regression phenomenon (p < 0.05). There was no significant association between BRAFV600E and gender, histological type, Clark level, Breslow thickness, solar elastosis, angiolymphatic and perineural invasion, sattelitosis, coexisting melanocytic nevus and survival. The presence of a mutation in NRAS, by RT-PCR was seen in 3.95% (3/76) of the cases. All these three mutations were of type 61K, occurred in male patients and the head and neck region. BRAFV600E and NRAS mutations, when present, were mutually exclusive. The frequency of KIT mutations, analyzed by sequencing, was 11.1% (3/27). The three mutations identified in this gene were located in exon 9 (G510, G498S and 489I). Concomitant mutations were found between KIT and NRAS and BRAFV600E. Due to the small number of KIT and NRAS mutated cases, it was not possible to establish clinical and histopathological correlations and mutation status in these genes. This study was the first to describe the G510D and G498S mutations in KIT gene in cutaneous melanomas. In the present study, BRAFV600E mutation in cutaneous melanoma of young adults correlated with anatomic and clinical features of worse prognosis compared to wild type
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Hagger, Robert William. "Chronic idiopathic constipation : role of colonic motor activity interstital cells of cajal and the c-kit proto-oncogene." Thesis, St George's, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404569.

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Mendonça, Ullyanov Bezerra Toscano de. "Análise de mutações do gene KIT em pacientes com melanoma de mucosa de cabeça e pescoço e relação clínica retrospectiva." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/5/5132/tde-14122015-114016/.

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Introdução: O melanoma mucoso de cabeça e pescoço (MMCP) é mais agressivo do que o melanoma cutâneo, marcadores prognósticos desta patologia não foram completamente esclarecidos devido a sua raridade. Em recentes estudos, algumas vias moleculares foram descritas na fisiopatologia destes tumores. Entre estas vias, existe a via da MAPK (Mitogen Activated Protein Quinase). Esta via de sinalização está envolvida no controle do crescimento celular, proliferação e migração, com um papel no desenvolvimento e progressão do melanoma. Além disso, a mutação do gene KIT foi identificada em melanomas, indicando a possibilidade de benefícios terapêuticos com o uso dos inibidores de tirosino-quinase. Objetivos: descrever a prevalência e características de mutações ativadoras do gene KIT em 28 pacientes com MMCP tratados no Instituto Nacional do Câncer-INCa; avaliar a relação entre a presença de mutação ativadora do gene KIT e evolução clínica dos pacientes tratados em relação ao estadiamento, sobrevida livre de doença e sobrevida global. Métodos: Estudo retrospectivo de coorte, foram incluídos 28 pacientes com MMCP tratados no INCA, entre 1998 e 2009. Foram analisados: estadiamento, tratamento primário, sobrevida livre de doença (SLD) e sobrevida global (SG). As curvas de sobrevida foram analisados utilizando o método de Kaplan-Meier, com software SPS 11.0. Análise KIT: O DNA foi extraído a partir de tecido incluído e fixado em parafina. O procedimento consiste de múltiplas etapas de desparafinização com xilol. Os restos celulares são precipitados por centrifugação e o DNA, no sobrenadante é utilizado nas reações de PCR (direto ou diluído). A análise mutacional do gene foi realizada utilizando-se a amplificação por PCR seguida pelo sequenciamento genômico. As análises são iniciadas pelo éxon 11, seguidas do éxon 9, 17 e 13. Resultados: Os pacientes eram predominantemente do sexo feminino (57%). A idade de apresentação variou de 27 a 85 anos. A região nasossinusal foi o sítio primário mais frequente (75%). Todos os pacientes foram submetidos a ressecção cirúrgica. Dezessete pacientes receberam radioterapia adjuvante (37%). As recorrências ocorreram em 82% dos pacientes. Presença de mutação de KIT foi encontrada em 7 casos (25%), três no éxon 9, 3 no éxon 11 e 1 no éxon 13. Fatores preditivos de recorrência foram índice mitótico (p = 0,05), invasão vascular (p = 0,043), e a disseminação perineural (p = 0,034). Não houve diferenças significativas na SLD e SG de acordo com a mutação KIT. Conclusão: A presente série incluiu 28 casos tratados. Sete casos (25%) tinham mutações ativadoras KIT. Esta descoberta sugere que existe um grupo de pacientes que poderiam se beneficiar com a terapia-alvo adequado com inibidores de tirosino-quinase
Unlike their cutaneous counterparts, head and neck mucosal malignant melanomas (HNMM) behave much more aggressively and their prognostic markers have not been fully elucidated. In recent studies, some molecular pathways have been found to be involved in the pathogenesis of melanomas. Among these, there is a proliferative MAPK pathway (\"Mitogen Activated Protein Kinase\"). This signaling pathway is involved in controlling cell growth, proliferation and migration, with a role in the development and progression of melanoma. In addition, KIT gene mutation has been identified in melanomas, indicating that there may be potential therapeutic benefits of tyrosine kinase inhibitors. Objectives: Evaluation of KIT mutation prevalence in a subset of 28 patients with HNMM treated at a single institution, establishing the relationship between different mutations and outcome (DFS and OS). The primary end-point of the study was to define the incidence of KIT mutations in HNMM, including the relationship between KIT mutations with disease-free survival (DFS) and overall survival (OS) in HNMM. Secondary end-points were correlation among therapeutic options, histopathological findings, demographic data and clinical response. Methods: This retrospective study comprised data of 28 patients with HNMM treated at Brazilian National Cancer Institute (INCA) between 2000 and 2011. Clinical analysis included patients characteristics, staging, primary and palliative treatments, disease free survival and overall survival. Progression-free survival and overall survival were analyzed using the Kaplan-Meier method, with SPS 11.0 software. KIT analysis: paraffin blocks were selected following analyses of histologic preparations, enabling DNA extraction. Different DNA concentrations were employed in PCR amplifications, based on DNA integrity. PCR amplification of exon, 9, 11, 13 and 17 was performed. . Results: Patients were predominantly females (57%). The age of presentation ranged from 27 to 85 years. The sinonasal region was the most frequent primary site (75%). All patients underwent surgical resection. Seventeen patients received adjuvant radiotherapy (37%). Recurrences occurred in 82% patients. Oncologic mutations in KIT were found in 7 (25%) of seven tumors, 3 in exon 9, 3 in exon 11 and 1 in exon 13. Predictive factors for recurrence were mitotic rate (p=0.05), vascular invasion (p=0.043), and perineural spread (p=0.034). There were no significant differences in DFS and OS according to KIT mutation. Conclusion: HNMM remains a rare disease. The present single-institution series includes 28 cases treated in single institution. Seven cases (25%) had activating KIT mutations, which is an increased prevalence of activating KIT mutations in this specific subset of mucosal melanomas. This finding suggests that there is a group of patients who might benefit with appropriate targeted therapy with kinase inhibitors
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Zhang, Qiangnu [Verfasser], and Stephanie [Akademischer Betreuer] Rössler. "FUNCTIONAL ANALYSIS OF PROTO-ONCOGENE c-KIT IN THE DEVELOPMENT AND PROGRESSION OF HEPATOCELLULAR CARCINOMA / Qiangnu Zhang ; Betreuer: Stephanie Rössler." Heidelberg : Universitätsbibliothek Heidelberg, 2019. http://d-nb.info/1193347270/34.

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Shahidian, Lara Zorro. "Characterization of in vitro models for the study of candidate G-quadruplex ligands targeting the human c-KIT proto-oncogene promoter." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2013. http://hdl.handle.net/10400.5/6216.

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Dissertação de Mestrado Integrado em Medicina Veterinária
Proto-oncogene c-KIT has been implicated in the development and growth of several tumors, e.g. mast cell tumors (MCT) in dogs and gastrointestinal stromal tumors (GIST) in humans. Several therapeutic approaches directed to the blocking of receptor tyrosine kinases (RTK), such as c-KIT, have been created. However, after a short period of recovery, these drugs lose efficiency and the tumor relapses. A new approach, aiming to control c-KIT’s transcription, is being tested. This approach relies on the use of small molecule inhibitors (SMI) that specifically block DNA secondary structures, G-quadruplexes, located on the promoter regions of many proto-oncogenes, including c-KIT. The main goal of this work is the development of in vitro models through which the study of candidate SMIs for human c-KIT is possible. An in vitro model, composed by cytotoxicity tests aimed for the determination of the SMI’s inhibitory concentration 50 (IC50) on two human cell lines and by real time quantitative PCR (qPCR) for the study of gene expression alterations, has been developed and validated. The cytotoxicity tests were also used to identify the IC50 of three candidate ligands for c-KIT.
RESUMO - Caracterização de modelos in vitro para o estudo de possíveis ligandos de G-quadruplex dirigidos à região promotora do proto-oncogene c-KIT no Homem - O proto-oncogene c-KIT tem sido relacionado com o desenvolvimento e crescimento de vários tumores, incluindo mastocitomas em cães e tumores do estroma gastrointestinal no Homem. Várias abordagens terapêuticas têm vindo a ser desenvolvidas tendo como objetivo bloquear os recetores de tirosina quinase, tais como c-KIT. No entanto, após um curto período de recuperação, estes fármacos perdem eficácia e o tumor reaparece. Está a ser testada uma nova abordagem, que visa controlar a transcrição de c-KIT. Esta abordagem recorre ao uso de pequenas moléculas inibidoras que bloqueiam, de forma específica, estruturas secundárias de ADN, G-quadruplex, localizadas na região promotora de vários proto-oncogenes, incluindo c- KIT. O principal objetivo deste trabalho é o desenvolvimento de modelos in vitro que possam ser utilizados para estudar possíveis moléculas inibidoras para o c-KIT humano. Assim foi desenvolvido e validado um modelo in vitro, composto por testes de citotoxicidade, que visam determinar a concentração inibitória 50 dos ligandos, em duas linhas celulares humanas, e por métodos de PCR quantitativo em tempo real, para o estudo das alterações na expressão génica. Os testes de citotoxicidade foram também utilizados para identificar a concentração inibitória 50 de três possíveis ligandos para c-KIT.
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Book chapters on the topic "KIT proto-oncogene"

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McCulloch, E. A., and M. D. Minden. "The cell surface receptor encoded by the proto-oncogene KIT and its ligand." In Leukemia: Advances in Research and Treatment, 45–77. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3086-2_4.

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Conference papers on the topic "KIT proto-oncogene"

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Sanchez Calle, Anna, Kenta Hoshikawa, Neha Nair, Marta Prieto-Vila, Arun Vaidyanath, Tomonari Kasai, and Masaharu Seno. "Abstract 1725: The significance of c-Kit proto-oncogene in iCSC-derived PDAC model." In Proceedings: AACR 107th Annual Meeting 2016; April 16-20, 2016; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-1725.

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Sissi, Claudia, Silvia Da Ros, Eleonora Zorzan, Caterina Musetti, Lara Zorro Shahidian, Manlio Palumbo, Mery Giantin, and Mauro Dacasto. "Abstract 4551: Impairment of c-kit expression in human cancer cell lines by a novel pharmacophoric unit selected for the recognition of the proto-oncogene KIT promotorial region." In Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.am2015-4551.

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