title: Polymorphisms of glutathione-S-transferases M1, T1, P1 and susceptibility to colorectal cancer in a sample of the Tunisian population.
abstract: In this study, we investigated the associations of polymorphisms in glutathione-S-transferases (GSTs) genes that are GSTM1, GSTT1, and GSTP1, with sporadic colorectal cancer (CRC). Hundred and fifty patients with CRC and 128 healthy controls were genotyped. DNA was isolated from blood samples. Polymorphisms were assessed by polymerase chain reaction-restriction fragment length polymorphism-based methods and polymerase chain reaction multiplex. Logistic regression analyses showed significant risk for CRC associated with GSTP1 homozygotes for Val-105 (OR 4.82; 95 % CI 1.97-11.80) or for individuals who possessed at least one Val-105 allele (OR 2.54; 95 % CI 1.751-3.703). There were no statistically significant differences in the frequency of GSTM1- and GSTT1-null genotypes (p > 0.05). The GSTM1-null was found in 70.47 % of all cases and 70.07 % of controls (OR 0.61; 95 % CI 0.33-1.12). The GSTT1-null genotype was found in 38.77 % of cases and 49.22 % of controls (OR 1.53; 95 % CI 0.94-2.47). No effect of any genotype for GSTM1 and GSTT1 on CRC was detected. But then an association between the polymorphism of the GSTP1 and the CRC susceptibility was detected.
authors.affiliation: Biochemistry Laboratory, Farhat Hached University Hospital, Sousse, Tunisia.
authors.forename: Asma
authors.initials: A
authors.lastname: Kassab
authors.forename: Awatef
authors.initials: A
authors.lastname: Msolly
authors.forename: Ramzi
authors.initials: R
authors.lastname: Lakhdar
authors.forename: Olfa
authors.initials: O
authors.lastname: Gharbi
authors.forename: Abdelhédi
authors.initials: A
authors.lastname: Miled
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D016022:Case-Control Studies; D015179:Colorectal Neoplasms / Q000453:epidemiology* / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D051549:Glutathione S-Transferase pi / Q000235:genetics*; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D007532:Isoleucine / Q000235:genetics; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D014416:Tunisia; D014633:Valine / Q000235:genetics
chemical_list: D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D007532:Isoleucine; D014633:Valine; C413545:glutathione S-transferase T1; C496556:GSTP1 protein, human