Polymorphism of thymidylate synthase gene associated with its protein expression in human colon cancer.

World Journal of Gastroenterology : WJG
Kai-Huan YuZe-Sheng Wang

Abstract

To correlate the polymorphisms in the 5'-untranslated region with thymidylate synthase (TS) protein expression in Han Chinese colonic neoplasms. Adenocarcinoma samples were from 68 patients who received no treatment before surgery. Tandem repeat length of TS gene was determined by PCR amplification of genomic DNA. Intratumoral TS protein expression was studied immunohistochemically in corresponding sections from paraffin-embedded primary foci. Immunoreactivity was semiquantitatively evaluated by immunoreactivity score (IRS). Double-(2R) and triple-repeated (3R) sequences of the TS gene were found in the cancer tissues. Three genotypes of TS were found: 2R/2R (n=6), 2R/3R (n=22) and 3R/3R (n=40). Patients who were homozygous for triple-repeated (3R/3R) sequences showed significantly higher IRS of TS than patients who were homozygous for double-repeated (2R/2R) sequences or heterozygous patients (2R/3R): 5.73+/-3.25 vs 2.17+/-1.47 or 3.77+/-2.64, P=0.008 or P=0.015. But no statistical significance of IRS in cancer tissues was observed between 2R/3R genotype and 2R/2R genotype. There is a relationship between TS genotype and TS protein expression in clinical specimens. The data might offer an advantage for selection of Chinese can...Continue Reading

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Citations

Dec 25, 2012·Clinical & Translational Oncology : Official Publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico·J GaoL Shen
May 4, 2011·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Marina VignoliMaurizio Genuardi
Sep 23, 2008·Vitamins and Hormones·Jennifer T Fox, Patrick J Stover
Mar 7, 2014·Clinical Medicine Insights. Oncology·Helena TaflinKristoffer Derwinger

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