alexa Lower red blood cell folate enhances the HPV-16-associated risk of cervical intraepithelial neoplasia.
Medicine

Medicine

Internal Medicine: Open Access

Author(s): Piyathilake CJ, Macaluso M, Brill I, Heimburger DC, Partridge EE

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Abstract OBJECTIVE: We previously reported that higher circulating concentrations of folate are independently associated with a lower likelihood of becoming positive for high-risk human papillomaviruses (HR-HPVs) and of having a persistent HR-HPV infection and a greater likelihood of becoming HR-HPV negative (Cancer Res 2004;64:8788-93). In the present study conducted in the same study population, we tested whether circulating folate concentrations modify the risk of cervical intraepithelial neoplasia (CIN) > or =2 associated with specific types of HR-HPV. METHODS: Multiple logistic regression models were used to assess associations (odds ratio with 95\% confidence intervals) across HR-HPV, folate, and rigorously reviewed cervical histology of each subject. RESULTS: HPV-16-positive women with low red blood cell folate were significantly more likely to be diagnosed with CIN > or =2 than were HPV-16-negative women with higher red blood cell folate (odds ratio 9, 95\% confidence interval 3.3-24.8). CONCLUSION: To our knowledge, this is the first study reporting an independent association of folate with risk of having CIN > or =2 in a population tested extensively for HR-HPV and CIN that also adequately controlled for several other micronutrients and known risk factors for CIN. Our findings suggest that improving the folate status in HR-HPV-infected women may reduce the risk of CIN and thus the risk of cervical cancer. Folate supplementation should be tested as a means of reducing the risk of developing CIN > or =2 in women exposed to HR-HPV, especially HPV-16. This article was published in Nutrition and referenced in Internal Medicine: Open Access

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