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BACKGROUND:  Tobacco smoking plays an important role in nasopharyngeal carcinoma (NPC) risk. The Wingless-related integration site ( WNT ) Inhibitory Factor 1 ( WIF1 ) as one of the tumor suppressor gene (TSG), functions to control cell proliferation through suppression of  WNT  signaling pathway.  WIF1  methylation is one of epigenetic mechanisms which causes overactivated of  WNT  pathway in NPC development.  WIF1  methylation from buffy coat related to smoking status and NPC risk is not known yet.   METHODS:  This was a nested case-control study involving 39 newly diagnosed NPC patients and 40 healthy controls. All subjects were enrolled at Dr. Sardjito Hospital, Yogyakarta. Subjects were male, with known smoking status, duration, and quantity of cigarette consumed. Parallel DNA isolated from buffy coat was used for  WIF1  DNA methylation analysis, by using methylation-specific PCR (MSP) method. Chi-square analysis was used to determine distribution of differences among groups. Two tailed  p -value≤0.05 was considered as statistically significant.   RESULTS:  No significant difference between WIF1 methylation of cases and controls ( p =0.30), nor smoking habit among smokers ( p =0.51) and non-smokers ( p =0.43).   CONCLUSION:  WIF1 methylation from buffy coat could not be used as an NPC marker nor as a smoking behavior marker.   KEYWORDS:  buffy coat, cigarette smoking, methylation, nasopharyngeal carcinoma, WIF1

the indonesian biomedical journal

WIF1 Qualitative-Methylation from Peripheral Blood Could Not Be Used as Biomarker for The Risk of Nasopharyngeal Carcinoma or Smoking Behavior in Yogyakarta Panel