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Authors Mersereau JE, Levy N, Staub RE, Baggett S, Zogovic T, Zogric T, Chow S, Ricke WA, Tagliaferri M, Cohen I, Bjeldanes LF, Leitman DC
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Journal Mol. Cell. Endocrinol. Volume: 283 Issue: 1-2 Pages: 49-57
Publish Date 2008 Feb 13
PubMed ID 18177995
PMC ID 2277338
Abstract

After the Women’s Health Initiative found that the risks of hormone therapy outweighed the benefits, a need for alternative drugs to treat menopausal symptoms has emerged. We explored the possibility that botanical agents used in Traditional Chinese Medicine for menopausal symptoms contain ERbeta-selective estrogens. We previously reported that an extract containing 22 herbs, MF101 has ERbeta-selective properties. In this study we isolated liquiritigenin, the most active estrogenic compound from the root of Glycyrrhizae uralensis Fisch, which is one of the plants found in MF101. Liquiritigenin activated multiple ER regulatory elements and native target genes with ERbeta but not ERalpha. The ERbeta-selectivity of liquiritigenin was due to the selective recruitment of the coactivator steroid receptor coactivator-2 to target genes. In a mouse xenograph model, liquiritigenin did not stimulate uterine size or tumorigenesis of MCF-7 breast cancer cells. Our results demonstrate that some plants contain highly selective estrogens for ERbeta.

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