An intron 4 VNTR polymorphism of the endothelial nitric oxide synthase gene is associated with early-onset colorectal cancer

Chih Ching Yeh, Regina M. Santella, Ling Ling Hsieh, Fung Chang Sung, Reiping Tang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Endothelial-derived nitric oxide, which is produced by endothelial nitric oxide synthase (eNOS), may play an important role in colorectal carcinogenesis. However, the putative contribution of common eNOS genetic polymorphisms to colorectal cancer risk remains unknown. We genotyped 3 polymorphisms of eNOS (T- 786C, G894T, and intron4b/a) in 727 colorectal adenocarcinoma cases and 736 age- and sex-matched healthy controls in Taiwan. Genotypes of the T-786C and G894T polymorphisms were determined by fluorescence polarization assays and the 27-bp variable number of tandem repeat (VNTR) polymorphism in intron 4 (intron4b/a) was analyzed by PCR. Logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Among younger participants ( 1, i.e.,CT+TT for T-786C, ba+aa for intron4b/a, and GG for G894T) of eNOS had a higher colorectal cancer risk (ptrend = 0.039). Compared with younger individuals without any putative high-risk genotypes, those with 3 high-risk genotypes had a significantly greater cancer risk (OR = 1.89, 95% CI = 1.04-3.43). Our results suggest that the eNOS intron4b/a polymorphism may contribute to early-onset colorectal cancer risk in the Taiwanese population.

Original languageEnglish
Pages (from-to)1565-1571
Number of pages7
JournalInternational Journal of Cancer
Volume124
Issue number7
DOIs
Publication statusPublished - Apr 1 2009
Externally publishedYes

Keywords

  • Colorectal cancer
  • Early-onset
  • Endothelial nitric oxide synthase
  • Polymorphisms

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Medicine(all)

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