Circulating 2-hydroxy and 16-α hydroxy estrone levels and risk of breast cancer among postmenopausal women - 1 views
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2-OH estrogens bind to the estrogen receptor (ER) with affinity equivalent to or greater than estradiol
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previous prospective studies have not observed any significant associations with either 2-OH or 16α-OH estrone or the ratio of the two metabolites and breast cancer risk overall.
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it has been hypothesized that metabolism favoring the 2-OH over the 16α-OH pathway may be inversely associated with breast cancer risk (28).
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The risks of estrogen metabolism are not clear cut. Likely never will be due to the complexity of individual metabolism. This study found no correlation between 2OH-Estrone and 2OH:16alpha-Estrone and breast cancer risk in ER+/PR+ breast cancer. Translated: no benefit in breast cancer risk in 2OH-Estrone metabolism or increased 2OH:16alpha estrone metabolism. There was a positive association between 2OH-Estrone and 2:16alpha-Estrone in women with ER-/PR- tumors and low BMI.
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