title: Polymorphism of GSTM1 gene in patients with colorectal cancer and colonic polyps.
abstract: The frequency of the GSTM1 gene in patients with nonpolyposis colorectal cancer (CRC) (n = 70) and in subjects with colonic polyps (n = 27) was evaluated and compared with healthy individuals (n = 145). Patients with CRC were divided into the three groups: patients coming from the families with hereditary nonpolyposis colorectal cancer (HNPCC) (n = 17); patients with a high risk of HNPCC who were referred to as suspected of HNPCC (n = 25); patients with sporadic colorectal cancer without clinical features of hereditary tumours (n = 28). A simple polymerase chain reaction (PCR) - based assay to identify GSTM1 nulled and positive (non-nulled) genotype was used. No significant differences in frequency of nulled individuals were observed in both patients with HNPCC and patients suspected of HNPCC as well as in subjects with colonic polyps. The most interesting observation was made in the group of patients with sporadic CRC. Twenty individuals (71.4 %) of the group were GSTM 1 deficient which was significantly different from the control population (p < 0.04). The above data indicate that the absence of the GSTM1 gene is associated with a greater risk of sporadic colorectal cancer. There is an increase in the overall risk of approximately 2.5 as compared with the control population.
authors.affiliation: Department of Pharmacology and Toxicology, Medical Academy, Powstańców, Szczecin, Poland. gszklarz@r1.pam.szczecin.pl
authors.forename: B
authors.initials: B
authors.lastname: Gawrońska-Szklarz
authors.forename: J
authors.initials: J
authors.lastname: Lubiński
authors.forename: J
authors.initials: J
authors.lastname: Kladny
authors.forename: G
authors.initials: G
authors.lastname: Kurzawski
authors.forename: D
authors.initials: D
authors.lastname: Bielicki
authors.forename: M
authors.initials: M
authors.lastname: Wójcicki
authors.forename: Z
authors.initials: Z
authors.lastname: Sych
authors.forename: H D
authors.initials: HD
authors.lastname: Musial
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003111:Colonic Polyps / Q000201:enzymology / Q000235:genetics*; D015179:Colorectal Neoplasms / Q000201:enzymology / Q000235:genetics*; D003123:Colorectal Neoplasms, Hereditary Nonpolyposis / Q000201:enzymology / Q000235:genetics; D005260:Female; D017353:Gene Deletion; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D016133:Polymerase Chain Reaction
chemical_list: D005982:Glutathione Transferase