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2004 JUL 1 - (NewsRx.com & NewsRx.net) -- RARbeta P2 promoter methylation detected in breast cells collected via random periareolar fine needle aspiration (RPFNA) serves as a biomarker of breast cancer risk, study data show.
"Methylation of RARbeta P2 promoter is hypothesized to be an important early event in mammary carcinogenesis. RPFNA is a research technique developed to repeatedly sample mammary cells from the whole breast of asymptomatic high-risk subjects to assess both 1) breast cancer risk, and 2) response to chemoprevention [Fabian et al. J Natl Cancer Inst, 2000; Fabian et al. Clin Cancer Res, 2002]," said B.E. Ratliff and colleagues. "Coupling RARbeta P2 promoter methylation to RPFNA has the potential to enhance the sensitivity and specificity of RPFNA and to further delineate breast cancer risk."
At the 2004 annual meeting of the American Society of Clinical Oncology (ASCO), the researchers, hailing from Duke University, Ohio State University, and the University of Kansas Medical Center, described a study in which they tested "the frequency of RARbeta P2 methylation ... through methylation-specific-PCR (MS-PCR) in 1) tissue biopsy specimens from 17 low-risk, primary breast cancers with a 5-year patient clinical follow-up and 2) RPFNA samples performed in 21 subjects at increased risk of developing breast cancer.
"Risk was defined ...
Source: HighBeam Research, RARbeta P2 promoter methylation in RPFNA is biomarker for cancer risk.