Consulta: subjectFacets:"GSTM1"
Registros recuperados: 6
Data/hora: 02/06/2024 04:31:27

GSTT1 and GSTM1 null variants in Mestizo and Amerindian populations from northwestern Mexico and a literature review
Provedor de dados: 74
Autores: Palma-Cano,Luz Elena; Córdova,Emilio J.; Orozco,Lorena; Martínez-Hernández,Angélica; Cid,Miguel; Leal-Berumen,Irene; Licón-Trillo,Angel; Lechuga-Valles,Ruth; González-Ponce,Mauricio; González-Rodríguez,Everardo; Moreno-Brito,Verónica.
Abstract The GSTT1 and GSTM1 genes are key molecules in cellular detoxification. Null variants in these genes are associated with increase susceptibility to developing different types of cancers. The aim of this study was to determine the prevalence of GSTT1 and GSTM1 null genotypes in Mestizo and Amerindian individuals from the Northwestern region of Mexico, and to compare them with those reported worldwide. GSTT1 and GSTM1 null variants were genotyped by multiplex PCR in 211 Mestizos and 211 Amerindian individuals. Studies reporting on frequency of GSTT1 and GSTM1 null variants worldwide were identified by a PubMed search and their geographic distribution were analyzed. We found no significant differences in the frequency of the null genotype for GSTT1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oxidative stress; GSTT1; GSTM1; Null variants.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000500727

Polymorphisms of cytochrome P450 1A1, glutathione s-transferases M1 and T1 genes in ouangolodougou (Northern Ivory Coast)
Provedor de dados: 74
Autores: Santovito,Alfredo; Burgarello,Claudio; Cervella,Piero; Delpero,Massimiliano.
In this study, the frequencies of CYP1A1, GSTM1, and GSTT1 gene polymorphisms were determined in 133 healthy individuals from Ouangolodougou, a small rural town situated in the north of the Ivory Coast. As appeared in several published studies, ethnic differences in these frequencies have been found to play an important role in the metabolism of a relevant number of human carcinogens. In the studied sample, the frequencies of Ile/Ile (wild type), Ile/Val (heterozygous variant), and Val/Val (homozygous variant) CYP1A1 genotypes were 0.271, 0.692, and 0.037, respectively. Frequencies of GSTM1 and GSTT1 null genotypes were 0.361 and 0.331, respectively. No significant differences were noted between men and women. In contrast to published data for Africans,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CYP1A1; GSTM1; GSTT1; Genetic polymorphism; Ouangolodougou.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300006

No contribution of GSTM1 and GSTT1 null genotypes to the risk of neutropenia due to benzene exposure in Southeastern Brazil
Provedor de dados: 74
Autores: Lima,Carmen Silvia Passos; Lourenço,Gustavo Jacob; Lorand-Metze,Irene; Nascimento,Helvia; Saad,Sara Teresinha Ollala; Costa,Fernando Ferreira.
Exposure to benzene has been associated with haematological diseases such as neutropenia (NEB) and acute myeloid leukaemia (AML). We tested whether the null genotypes of the GSTM1 and GSTT1 genes, involved in benzene inactivation, altered the risk for NEB in southeastern Brazil. Genomic DNA from 55 NEB patients and 330 controls was analysed by multiplex-polymerase chain reaction. The frequency of the GSTM1, GSTT1 and combined null genotypes was similar in patients and controls (GSTM1, 27.3% vs. 38.8%, p = 0.16; GSTT1, 25.5% vs. 19.7%, p = 0.24; GSTM1/GSTT1, 12.7% vs. 6.7%, p = 0.26; respectively). The distribution of genotype classes in NEB patients was similar to normal controls, suggesting that GSTM1 and GSTT1 null genotypes make no specific contribution...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neutropenia; Glutathione S-transferase; GSTM1; GSTT1.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400006

Polymorphisms in the glutathione S-transferase theta and mu genes and susceptibility to myeloid leukemia in Brazilian patients
Provedor de dados: 74
Autores: Souza,Claudio Lima; Barbosa,Cynara Gomes; Moura Neto,José Pereira de; Barreto,José Henrique; Reis,Mitermayer Galvão; Gonçalves,Marilda Souza.
The null genotype for glutathione S-transferase (GST, EC 2.5.1.18) gene polymorphisms is considered a risk factor for leukemia in different populations. In this work we investigated the GSTT1 and GSTM1 polymorphisms using multiplex PCR in 53 patients with chronic myeloid leukemia (CML), 23 with acute promyelocytic leukemia (APL) and 304 apparently healthy controls. In this association study we found that the GSTT1null genotype was more frequent in our group of APL patients than in the control group [OR = 2.75 (95% CI = 1.10-6.88)], providing evidence that a deletion in the GSTT1 gene could be a risk factor for this type of leukemia.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Acute promyelocytic leukemia; Chronic myeloid leukemia; GSTM1; GSTT1; Gene polymorphism.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100008

Protection against laryngeal and pharyngeal carcinoma: Heterozygous vs. homozygous deletions of GSTM1 and GSTT1
Provedor de dados: 74
Autores: Masood,Nosheen; Kayani,Mahmood Akhtar.
Deletions in GSTM1 and GSTT1 genes are considered to be a risk factor for cancer development but the exact location of these deletions in the genome was unknown. Three main objectives of the current study were to: (a) identify the boundaries of these deletions in the human genome, (b) screen homozygous (-/-) and heterozygous (+/-) deleted, as well as homozygous present (+/+) individuals using PCR assays, (c) detect associations of pharyngeal (PC) and laryngeal cancer (LC) with the respective genotypes. In total, 102 PC and 92 LC patients were screened and compared with 150 controls. PCR mapping and sequencing revealed a 6 kbp deletion for GSTM1 and a 9 kbp deletion for the GSTT1 gene. The mean age of PC cases was 48.1 (±16.7) years; for LC cases it was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GSTM1; GSTT1 heterozygous; Homozygous; Deletions; Cancer.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100001

Genetic polymorphism of GSTM1 in women with breast cancer and interact with reproductive history and several clinical pathologies
Provedor de dados: 48
Autores: LINHARES,JOSÉ JUVENAL; GUERREIRO DA SILVA,ISMAEL DALE COTRIM; NOGUEIRA DE SOUZA,NAIARA C; COELHO NORONHA,EMMANUELLE; FERRARO,ODAIR; DE CARVALHO,CRISTINA VALLETA; CHADA BARACAT,EDMUND; FARAH BARACAT,FAUSTO.
Due to the conflicting results regarding the association between breast cancerand the GSTM1 null mutation, our aim was to research this associationin a Brazilian population and correlations withsmoking, reproductive history and several clinical pathologies. A case-control study was performed on 105 women with breast cancer and 278 controls. Extraction of DNA was accomplished according to the protocol of the GFX® kit and polymorphism analysis by the PCR technique. The control and experimental groups were compared and statistical analysis assessed by X² or Fisher's exact test. The deletion in the GSTM1 gene in the breast cancer group had a prevalence of 32 (30.4%) individuals with the presence of null mutation. In the control group, the null mutation was...
Tipo: Journal article
Palavras-chave: Breast cancer; Genetic polymorphisms; GSTM1.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200017