[Glutathione S-transferases (GSTM1, GSTT1 and GSTP1) and N-acetyltransferase 2 polymorphisms and the risk of gastric cancer].
OBJECTIVE
Polymorphisms of genes from glutathione S-transferases (GSTs) and N-acetyltransferase 2 (NAT2) have been associated with increased susceptibility to various cancers. Previous results showed that East Asians such as Koreans, Japanese and Chinese have a much higher frequency of the GSTM1 and GSTT1 null genotypes and NAT2 rapid acetylator type. Therefore, we investigated the association between the polymorphic types of GSTs (GSTM1, GSTT1, GSTP1) and NAT2 and the incidence of gastric cancer which is one of the most prevalent cancers among the East Asians.


METHODS
It was performed in a case-control study consisting of 238 healthy subjects and 108 cancer patients (54 distal and 54 proximal carcinomas). We also evaluated the association between GSTs and NAT2 and the risk factors for gastric cancer such as alcohol consumption, smoking, H. pylori infection, family history of gastric cancer, and tumor location.


RESULTS
In our study, the percentage of cases whose hometown was rural was higher than those of controls (odds ratio (OR) = 2.88; 95% CI = 1.72-4.76), and the frequency of the lower socio-economic status increased significantly in patients (OR = 2.53; 95% Cl = 1.59-4.02). There was no significant difference in the GST polymorphic types between the cases and controls. However, NAT2 rapid or intermediate acetylator types were frequently detected in the cases with family history of gastric cancer (OR = 1.92; 95% CI = 1.79-26.0).


CONCLUSIONS
These results suggest that the hometown and socio-economic status are important environmental factors for gastric carcinogenesis, and NAT2 polymorphic types could be associated with familial gastric carcinoma.
Hong
Su Hyung
SH
Department of Dental Microbiology, Kyungpook National University School of Dentistry.
Kim
Jung Wan
JW
Kim
Ho Gak
HG
Park
In Kyu
IK
Ryoo
Jun Wook
JW
Lee
Chang Hyeong
CH
Sohn
Yoon Kyung
YK
Lee
Jong Young
JY
D000368:Aged; D001191:Arylamine N-Acetyltransferase / Q000235:genetics*; D005202:Asia, Eastern / Q000453:epidemiology / Q000208:ethnology; D005260:Female; D020022:Genetic Predisposition to Disease; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000209:etiology / Q000235:genetics*
D001191:Arylamine N-Acetyltransferase; C478900:NAT2 protein, human; D005982:Glutathione Transferase