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- W2017127598 abstract "The objective of the study was to evaluate LINE-1 methylation as an intermediate biomarker for the effect of folate and vitamin B12 on the occurrence of higher grades of cervical intraepithelial neoplasia (CIN ≥ 2).This study included 376 women who tested positive for high-risk human papillomaviruses and were diagnosed with CIN ≥ 2 (cases) or CIN ≤ 1 (non-cases). CIN ≥ 2 (yes/no) was the dependent variable in logistic regression models that specified the degree of LINE-1 methylation of peripheral blood mononuclear cells (PBMCs) and of exfoliated cervical cells (CCs) as the independent predictors of primary interest. In analyses restricted to non-cases, PBMC LINE-1 methylation (≥ 70% versus <70%) and CC LINE-1 methylation (≥ 54% versus <54%) were the dependent variables in logistic regression models that specified the circulating concentrations of folate and vitamin B12 as the primary independent predictors.Women in the highest tertile of PBMC LINE-1 methylation had 56% lower odds of being diagnosed with CIN ≥ 2 (odds ratio 0.44, 95% confidence interval 0.24-0.83, P = 0.011), whereas there was no significant association between degree of CC LINE-1 methylation and CIN ≥ 2 (odds ratio 0.86, 95% confidence interval 0.51-1.46, P = 0.578). Among non-cases, women with supraphysiologic concentrations of folate (>19.8 ng/mL) and sufficient concentrations of plasma vitamin B12 (≥ 200.6 ng/mL) were significantly more likely to have highly methylated PBMCs compared with women with lower folate and lower vitamin B12 (odds ratio 3.92, 95% confidence interval 1.06-14.52, P = 0.041). None of the variables including folate and vitamin B12 were significantly associated with CC LINE-1 methylation.These results suggest that a higher degree of LINE-1 methylation in PBMCs, a one-carbon nutrient-related epigenetic alteration, is associated with a lower risk of developing CIN." @default.
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- W2017127598 date "2011-05-01" @default.
- W2017127598 modified "2023-09-26" @default.
- W2017127598 title "A higher degree of LINE-1 methylation in peripheral blood mononuclear cells, a one-carbon nutrient related epigenetic alteration, is associated with a lower risk of developing cervical intraepithelial neoplasia" @default.
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- W2017127598 doi "https://doi.org/10.1016/j.nut.2010.08.018" @default.
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