Resveratrol and Endometrium: A Closer Look at an Active Ingredient of Red Wine Using In Vivo and In Vitro Models

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Resveratrol acted as an agonist/antagonist of estrogen, and at high doses, reduced endometrial proliferation and ESR1 expression in mouse xenografts.

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This study investigated how resveratrol, a phytoestrogen from red wine, affects estrogen-related and proliferation-related signaling in human endometrial models using both in vitro Ishikawa cell assays and in vivo xenografts of human endometrial tissue implanted in ovariectomized immunodeficient RAG-2-γ(c) mice treated for 30 days with E2, E2 plus progesterone, or E2 plus resveratrol (6, 30, or 60 mg). Resveratrol showed concentration-dependent mixed estrogen activity when combined with E2: it acted as an agonist at low concentrations and an antagonist at higher concentrations, and at 60 mg it reduced ESR1 expression and decreased Ki-67 proliferative activity in the xenografts. Gene expression analyses assessed AhR and cytochrome P450 enzymes (CYP1A1 and CYP1B1) in the same xenografts, but the abstract’s main caveat is that reported conclusions are drawn from these model systems and specific endpoints rather than direct clinical outcomes. This paper is centrally about endometriosis—specifically, it uses human endometrial tissue models and focuses on resveratrol’s effects on estrogen receptor signaling and proliferation relevant to endometriosis-associated endometrial activity.

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Abstract

Resveratrol is a natural phytoestrogen with antiproliferative properties present in red wine, grapes, and berries. Published reports on the effects of resveratrol in human endometrial function are limited. The objective of this study was to investigate the expression of estrogen receptor α (ESR1), Ki-67 (a proliferative marker), aryl hydrocarbon receptor (AhR), and members of the cytochrome P450 superfamily of enzymes (CYP1A1 and CYP1B1) in an in vitro and vivo assay. Alkaline phosphatase assay of estrogenicity was used to compare estrogen activity of different concentrations of resveratrol to estradiol (E2) and diethylstilbestrol (DES), using Ishikawa cell culture. Immunohistochemical expression of ESR1 and Ki67, and reverse transcriptase polymerase chain reaction of AhR, CYP1A1, and CYP1B1 were analyzed from xenograft implants of human endometrial tissue in ovariectomized immunodeficient RAG-2-γ(c) mice, after 30 days of treatment with subcutaneous pellets of E2, E2 plus progesterone (P4), or E2 plus resveratrol (6, 30, or 60 mg) for 30 days. Compared to E2, resveratrol acted as an agonist and antagonist of estrogen in low and high concentrations, respectively, when combined with E2. Xenografts of human endometrial tissues in RAG-2 mice exhibited reduced expression of ESR1 and proliferative activity (Ki67) with 60 mg of resveratrol. This study suggests that resveratrol, at high doses, has the potential benefit to reduce proliferation of human endometrium through ESR1. Similar content being viewed by others

References

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Reprod. Sci. 21, 1362–1369 (2014). https://doi.org/10.1177/1933719114525271 Published: Issue date: DOI: https://doi.org/10.1177/1933719114525271

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MeSH descriptors

Endometrium Phytoestrogens Stilbenes Wine Alkaline Phosphatase Alkaline Phosphatase Animals Basic Helix-Loop-Helix Proteins Basic Helix-Loop-Helix Proteins Basic Helix-Loop-Helix Proteins Basic Helix-Loop-Helix Proteins Cell Proliferation Cell Proliferation Cytochrome P-450 CYP1A1 Cytochrome P-450 CYP1A1 Cytochrome P-450 CYP1A1 Cytochrome P-450 CYP1B1 Cytochrome P-450 CYP1B1 Cytochrome P-450 CYP1B1 Diethylstilbestrol

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