Consulta: subjectFacets:"Oncogene"
Registros recuperados: 5
Data/hora: 10/06/2024 09:25:40

High frequency of the HRAS oncogene codon 12 mutation in Macedonian patients with urinary bladder cancer
Provedor de dados: 74
Autores: Panov,Sasho; Roganovic-Zafirova,Danica; Stavric,George; Yashar,Genghis; Popov,Zivko.
Point mutations at codon 12 of the HRAS (v-Ha-ras Harvey rat sarcoma viral oncogene homolog) oncogene are one of the best defined and widely studied molecular genetic events in transitional cell carcinoma (TCC) of the urinary bladder. The aim of this study was to use the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis of paraffin-embedded tissue-derived DNA to determine the frequency of the HRAS oncogene G -&gt;T codon 12 mutation in TCC patients being treated at the University Urology Clinic in Skopje, Republic of Macedonia. DNA isolated from paraffin-embedded tissue (PET) surgically removed TCC specimens of 62 (81.58%) out of 76 patients were successfully amplified, the remaining 14 (18.42%) showing compromised DNA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HRAS; Oncogene; Bladder cancer; PCR-RFLP.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100002

DNA replication stress: oncogenes in the spotlight
Provedor de dados: 74
Autores: Primo,Luiza M. F.; Teixeira,Leonardo K.
Abstract Precise replication of genetic material is essential to maintain genome stability. DNA replication is a tightly regulated process that ensues faithful copies of DNA molecules to daughter cells during each cell cycle. Perturbation of DNA replication may compromise the transmission of genetic information, leading to DNA damage, mutations, and chromosomal rearrangements. DNA replication stress, also referred to as DNA replicative stress, is defined as the slowing or stalling of replication fork progression during DNA synthesis as a result of different insults. Oncogene activation, one hallmark of cancer, is able to disturb numerous cellular processes, including DNA replication. In fact, extensive work has indicated that oncogene-induced replication...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cancer; Cell cycle; DNA replication; Oncogene; Replication stress.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000200301

c-Myc protein expression is not an independent prognostic predictor in cervical squamous cell carcinoma
Provedor de dados: 56
Autores: Brenna,S.M.F.; Zeferino,L.C.; Pinto,G.A.; Souza,R.A.; Andrade,L.A.L.; Vassalo,J.; Martinez,E.Z.; Syrjänen,K.J.
The c-myc protein is known to regulate the cell cycle, and its down-regulation can lead to cell death by apoptosis. The role of c-myc protein as an independent prognostic determinant in cervical cancer is controversial. In the present study, a cohort of 220 Brazilian women (mean age 53.4 years) with FIGO stage I, II and III (21, 28 and 51%, respectively) cervical squamous cell carcinomas was analyzed for c-myc protein expression using immunohistochemistry. The disease-free survival and relapse-rate were analyzed using univariate (Kaplan-Meier) survival analysis for 116 women who completed the standard FIGO treatment and were followed up for 5 years. Positive c-myc staining was detected in 40% of carcinomas, 29% being grade 1, 9% grade 2, and 2% grade 3....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C-myc; Oncogene; Cervical cancer; Prognosis.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000400003

Genetic alterations in head and neck squamous cell carcinomas
Provedor de dados: 56
Autores: Nagai,M.A.
The genetic alterations observed in head and neck cancer are mainly due to oncogene activation (gain of function mutations) and tumor suppressor gene inactivation (loss of function mutations), leading to deregulation of cell proliferation and death. These genetic alterations include gene amplification and overexpression of oncogenes such as myc, erbB-2, EGFR and cyclinD1 and mutations, deletions and hypermethylation leading to p16 and TP53 tumor suppressor gene inactivation. In addition, loss of heterozygosity in several chromosomal regions is frequently observed, suggesting that other tumor suppressor genes not yet identified could be involved in the tumorigenic process of head and neck cancers. The exact temporal sequence of the genetic alterations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic alterations; Oncogene; Tumor suppressor gene; Head and neck cancer.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700015

The regulation of apoptotic cell death
Provedor de dados: 56
Autores: Amarante-Mendes,G.P.; Green,D.R.
Apoptosis is a fundamental biological phenomenon in which the death of a cell is genetically and biochemically regulated. Different molecules are involved in the regulation of the apoptotic process. Death receptors, coupled to distinct members of the caspases as well as other adapter molecules, are involved in the initiation of the stress signals (The Indictment). Members of the Bcl-2 family control at the mitochondrial level the decision between life and death (The Judgement). The effector caspases are responsible for all morphological and biochemical changes related to apoptosis including the "eat-me" signals perceived by phagocytes and neighboring cells (The Execution). Finally, apoptosis would have little biological significance without the recognition...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoptosis; Cell death; Caspase; Mitochondria; Bcl-2; Oncogene.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000900001