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Influences of Chymase and Angiotensin I-Converting Enzyme Gene Polymorphisms on Gastric Cancer Risks in Japan

¹ First Department of Medicine, ² Center for Clinical Research, ³ Department of Laboratory Medicine, and ⁴ First Department of Pathology, Hamamatsu University School of Medicine, Shizuoka, Japan

Requests for reprints: Mitsushige Sugimoto, First Department of Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu 431-3192, Japan. Phone: 81-53-435-2261; Fax: 81-53-434-9447. E-mail: mitsu{at}hama-med.ac.jp

Backgrounds and Aims: The renin-angiotensin system plays an important role in homeostasis. Angiotensin II, which is generated by chymase and angiotensin I-converting enzyme (ACE), controls blood pressure as well as angiogenesis and cell proliferation. The aim of this study was to clarify the association of the chymase gene (CMA/B) and ACE polymorphisms with susceptibility to gastric cancer and peptic ulcer.

Methods: We assessed CMA/B A/G and ACE insertion/deletion (I/D) polymorphisms in H. pylori-positive gastric cancers (n = 119), gastric ulcers (n = 127), and duodenal ulcers (n = 105), and controls (n = 294) consisting of H. pylori-positive gastritis alone (n = 162) and H. pylori-negative subjects (n = 132) by PCR methods.

Results: In CMA/B polymorphism, the age- and sex-adjusted odds ratios (OR) of A/A and A/G genotypes relative to the G/G genotype for gastric cancer risk were 7.115 (95% confidence interval, 1.818-27.845) and 1.956 (95% confidence interval, 1.137-3.366), respectively. There was an increased risk for gastric ulcer in the A/A genotype (OR, 3.450; 1.086-10.960). However, there was no association between ACE polymorphism and susceptibility to gastric cancer and peptic ulcer. In allele combination analysis of CMA/B and ACE polymorphisms, the A/I allele combinations (CMA/B G/A or A/A and ACE I/I genotype) significantly increased the risk of gastric cancer development (OR, 4.749, 2.050-11.001) compared with the G/I allele combinations (CMA/B G/G and ACE I/I genotype).

Conclusions: The CMA/B polymorphism was associated with an increased risk for gastric cancer and gastric ulcer development. The genotyping test of the renin-angiotensin system could be useful for the screening of individuals with higher risks of gastric cancer and gastric ulcer. (Cancer Epidemiol Biomarkers Prev 2006;15(10):1929–34)

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				M. Sugimoto, T. Furuta, N. Shirai, C. Kodaira, M. Nishino, M. Ikuma, H. Sugimura, and A. Hishida Role of angiotensinogen gene polymorphism on Helicobacter pylori infection-related gastric cancer risk in Japanese Carcinogenesis, September 1, 2007; 28(9): 2036 - 2040. [Abstract] [Full Text] [PDF]