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Insulin-like growth factor 2 hypomethylation of blood leukocyte DNA is associated with gastric cancer risk

By Yasuhito Yuasa, Hiromi Nagasaki, Isao Oze, Yoshimitsu Akiyama, Shunsuke Yoshida, Kouhei Shitara, Seiji Ito, Satoyo Hosono, Miki Watanabe, Hidemi Ito, Hideo Tanaka, Daehee Kang, Kai-feng Pan, Wei-cheng You and Keitaro Matsuo

Abstract

To determine whether or not the methylation status of blood leukocyte DNA can be used as a surrogate marker of the risk for cancer, we quantitatively determined the methylation levels of insulin-like growth factor 2 (IGF2) and TUSC3 in 299 gastric cancer cases, and 299 age- and gender-matched controls. The IGF2 methylation levels in blood leukocyte DNA of the cases were lower than those of the healthy controls and there was a significant trend of increasing gastric cancer risk with decreasing methylation level of IGF2. Patients with hypermethylated IGF2 in blood leukocyte DNA showed a significantly better survival rate than those with hypomethylated IGF2, indicating that the IGF2 methylation level in blood leukocyte DNA can be a possible marker not only of the risk for but also of the prognosis of gastric cancer. In contrast, the TUSC3 methylation level in blood leukocyte DNA was higher in the cases than in the healthy controls, but the difference was not significant. The past lifestyle and clinicopathological characteristics of the participants were analyzed for any relationship with the methylation level. With aging and smoking, methylation of IGF2 and TUSC3 decreased and increased in blood leukocyte DNA, respectively. These results indicate that the methylation level of IGF2 in blood leukocyte DNA may be used as an important surrogate marker of the risk for gastric cancer.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000309185400014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OncologySCI(E)11ARTICLE112596-260313

Topics: DNA methylation, gastric cancer, IGF2, blood leukocyte, lifestyle, DIETARY FACTORS, METHYLATION STATUS, COLORECTAL-CANCER, FACTOR-II, GENE, IGF2, CARCINOGENESIS, EPIGENETICS, CARCINOMA, EVENTS
Publisher: international journal of cancer
Year: 2012
DOI identifier: 10.1002/ijc.27554
OAI identifier: oai:localhost:20.500.11897/229047
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