Genetic polymorphisms of CYP2E1, GSTT1, GSTP1, GSTM1, ALDH2, and ODC and the risk of advanced precancerous gastric lesions in a Chinese population.
There have been few studies of the associations of genetic polymorphisms with precancerous gastric lesions. We conducted a cross-sectional study to compare the prevalences of several genetic polymorphisms in 302 subjects with mild chronic atrophic gastritis with prevalences in 606 subjects with deep intestinal metaplasia or dysplasia. This stratified random sample of 908 subjects was selected and analyzed for genetic polymorphisms from 2,628 individuals who had gastric biopsies with histopathology in 1989 in Linqu County, Shandong Province, China. In subjects with mild chronic atrophic gastritis, the frequencies of the variant (less common) alleles of CYP2E1 RsaI, CYP2E1 DraI, GSTP1, ALDH2, and ODC were, respectively, 0.156, 0.201, 0.189, 0.190, and 0.428. The frequencies of the null genotypes of GSTM1 and GSTT1 in the mild chronic atrophic gastritis group were 0.509 and 0.565, respectively. Comparing mild chronic atrophic gastritis with deep intestinal metaplasia or any degree of dysplasia, we found no statistically significant associations with any genotype from these loci for dominant, additive, or recessive inheritance models. There was no statistically significant evidence of multiplicative interactions between any pair of genotypes based on CYP2E1 RsaI, CYP2E1 DraI, GSTP1, GSTM1, or GSTT1; nor between Helicobacter pylori status and any of these five loci; nor between smoking status and GSTP1, GSTM1, or GSTT1; nor between alcohol consumption and ALDH2. Statistically significant interactions were noted between salt consumption and GSTP1 and between sour pancake consumption and CYP2E1 RsaI. There was, moreover, a statistically significant interaction (odds ratio, 1.78; 95% confidence interval, 1.03-3.08) between CYP2E1 DraI and smoking at least one cigarette per day. A positive but not statistically significant interaction was also seen between CYP2E1 RsaI and smoking status. These polymorphisms do not seem to govern progression from mild chronic atrophic gastritis to advanced precancerous gastric lesions, but the effects of smoking may be accentuated in individuals carrying variants of CYP2E1.
You
Wei-cheng
WC
Peking University School of Oncology, Beijing Cancer Hospital and Beijing Institute for Cancer Research, #52 Fu-Cheng Road, Haidian District, Beijing 100036, People's Republic of China. weichengyou@yahoo.com
Hong
Jun-Yan
JY
Zhang
Lian
L
Pan
Kai-feng
KF
Pee
David
D
Li
Ji-you
JY
Ma
Jun-ling
JL
Rothman
Nathaniel
N
Caporaso
Neil
N
Fraumeni
Joseph F
JF
Xu
Guang-wei
GW
Gail
Mitchell H
MH
D000444:Aldehyde Dehydrogenase / Q000235:genetics; D000071396:Aldehyde Dehydrogenase, Mitochondrial; D044466:Asian People / Q000235:genetics*; D019392:Cytochrome P-450 CYP2E1 / Q000235:genetics; D005260:Female; D005757:Gastritis, Atrophic / Q000208:ethnology* / Q000235:genetics* / Q000473:pathology; D005838:Genotype; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase / Q000235:genetics; D006801:Humans; D007527:Isoenzymes / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009955:Ornithine Decarboxylase / Q000235:genetics; D011110:Polymorphism, Genetic; D011230:Precancerous Conditions / Q000208:ethnology* / Q000235:genetics* / Q000473:pathology; D012307:Risk Factors; D012907:Smoking; D013274:Stomach Neoplasms / Q000208:ethnology* / Q000235:genetics* / Q000473:pathology
D000444:Aldehyde Dehydrogenase; D000071396:Aldehyde Dehydrogenase, Mitochondrial; D019392:Cytochrome P-450 CYP2E1; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D007527:Isoenzymes; D009955:Ornithine Decarboxylase; C096127:ALDH2 protein, human; C413545:glutathione S-transferase T1; C496556:GSTP1 protein, human