Research Article

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11/30/2010
Astrocytoma; Glioblastoma; GSTP1; Polymorphism

Glutathione S-transferases (GSTs) constitute a superfamily of ubiquitous multifunctional enzymes that are involved in the cellular detoxification of a large number of endogenous and exogenous chemical agents that have electrophilic functional groups. People who have deficiencies in this family of genes are at increased risk of developing some types of tumors. We examined GSTP1 Ile105Val ... more

A.C. Custódio; L.O. Almeida; G.R. Pinto; M.J. Santos; J.R.W. Almeida; C.A. Clara; J.A. Rey; C. Casartelli
02/10/2012
Astrocytoma; Glioblastoma; Polymorphism; XRCC3

The gene XRCC3 (X-ray cross complementing group 3) has the task of repairing damage that occurs when there is recombination between homologous chromosomes. Repair of recombination between homologous chromosomes plays an important role in maintaining genome integrity, although it is known that double-strand breaks are the main inducers of chromosomal aberrations. Changes in the XRCC3 ... more

A.C. Custódio; L.O. Almeida; G.R. Pinto; M.J. Santos; J.R.W. Almeida; C.A. Clara; J.A. Rey; C. Casartelli
11/12/2012
Gastric cancer; Meta-analysis; Polymorphism; susceptibility; XRCC1

Association between the XRCC1 Arg399Gln polymorphism and susceptibility to gastric cancer has been investigated; overall, the results have been inconclusive. We made a meta-analysis of 13 case-control studies, including 3278 cases and 6243 controls. Crude odds ratios (OR) with 95% confidence intervals (95%CI) were used to assess this possible association. We found no evidence of a ... more

B.M. Liu; T.M. Liu; B.S. You; H.Y. You; J. Yang; L. Li; Y.C. He
05/16/2014
Clinical outcome; Hepatocellular carcinoma; Polymorphism; susceptibility; XPD; XRCC1

We explored the association between 4 XRCC1 (Arg194Trp and Arg399Gln) and XPD (Asp312Asn and Lys751Gln) polymorphisms with the development and prognosis of hepatocellular carcinoma (HCC). A total of 218 cases with HCC and 277 healthy controls were included in the study. Genotyping of the XRCC1 (Arg194Trp and Arg399Gln) and XPD (Asp312Asn and Lys751Gln) polymorphisms was ... more

J.S. Wu; Y.P. Chen; L.C. Wang; Y.J. Yang; C.W. Deng; B.X. Hou; Z.L. He; J.X. Chen
03/06/2014
Chemotherapy; Gastric cancer; Meta-analysis; Polymorphism; XRCC1

It is still controversial whether X-ray repair cross-complementing group (XRCC1) gene polymorphisms (Arg194Trp and Arg399Gln) are associated with the clinical outcome of platinum-based chemotherapy in gastric cancer patients based on published studies. Meta-analysis was performed to provide a systematic review of the findings. Eligible articles from the PubMed, SinoMed, and CNKI ... more

J. Xu; J. Ma; H.T. Zong; S.Y. Wang; J.W. Zhou
06/13/2013
Gene polymorphism; Hepatocellular carcinoma; Meta-analysis; XRCC1

XRCC1-399 allele polymorphisms have been reported to be associated with susceptibility to hepatocellular carcinoma (HCC), but the conclusions of the various studies have been inconsistent. We conducted a meta-analysis of available studies to determine whether XRCC1-399 alleles influence susceptibility to hepatocellular carcinoma. We searched English-language databases, ... more

X.Y. Zeng; J.M. Huang; J.W. Xu; Y. Xu; H.P. Yu; L. Ji; X.Q. Qiu
09/18/2002
Brazil; Glutathione S-transferase; Polymorphism

The glutathione S-transferase (GST) family of enzymes has a vital role in phase II of biotransformation of environmental carcinogens, pollutants, drugs and other xenobiotics. GSTs are polymorphic, with the type and frequency of polymorphism being ethnic dependent. Polymorphisms in GST genes have been shown to be associated with susceptibility to disease and disease outcome. We ... more

A. Rossini; D.C.M. Rapozo; L.M.F. Amorim; J.M.B. Macedo; R. Medina; J.F.N. Neto; C.V.M. Gallo; L.F.R. Pinto
03/28/2007
Dog breeds; Growth; Polymorphism; SNP; SOCS2

Suppressor of cytokine signaling 2 (SOCS2) is a negative regulator of growth hormone signaling. The deletion of SOCS2 in mice results in a 30-50% increase in post-natal growth. In an effort to identify polymorphisms in the SOCS2 gene that may be associated with body size in dogs, we characterized the canine SOCS2 gene and analyzed its genetic diversity among small and large dog breeds ... more

G. Rincón; A.E. Young; D.L. Bannasch; J.F. Medrano
03/14/2006
Alu; CEPH panel; Human population genetics; Polymorphism; X chromosome

We describe a novel polymorphic Alu insertion (DXS225) on the human X chromosome (Xq21.3) embedded into an L1 retrotransposon. The DXS225 polymorphism was genotyped in 684 males from the CEPH Human Genome Diversity Panel. This insertion was found in all regions of the globe, suggesting that it took place before modern humans spread from Africa ca. 100,000 ... more

R.Wellerson Pereira; S.Silva dos Santos; S.Danilo Jun Pena
01/05/2009
meningiomas; metastases; Methylation; Polymorphism; schwannomas; TP53

The p53 tumor suppressor gene is the most frequently mutated gene in human cancer; this gene is mutated in up to 50% of human tumors. It has a critical role in the cell cycle, apoptosis and cell senescence, and it participates in many crucial physiological and pathological processes. Polymorphisms of p53 have been suggested to be associated with genetically determined susceptibility in various ... more

L.O. Almeida; A.C. Custódio; G.R. Pinto; M.J. Santos; J.R.W. Almeida; C.A. Clara; J.A. Rey; C. Casartelli

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