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18.03.2016 | Gynecologic Endocrinology and Reproductive Medicine

Altered FoxO3 expression and apoptosis in granulosa cells of women with polycystic ovary syndrome

verfasst von: Saideh Mikaeili, Batool Hossein Rashidi, Majid Safa, Atefeh Najafi, Aligholi Sobhani, Ebrahim Asadi, Mehdi Abbasi

Erschienen in: Archives of Gynecology and Obstetrics | Ausgabe 1/2016

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Abstract

Purpose

To determine the level of apoptosis, and alteration of FoxO3 (forkhead box O3 transcription factor) expression and phosphorylation in human granulosa cells amongst polycystic ovary syndrome (PCOS) patients and control group.

Methods

We recruited infertile women with PCOS (n = 14) and compared them with infertile women due to tubal blockage or male factor infertility (n = 14, controls). GnRH agonist and gonadotropins were used for ovarian stimulation. Follicular fluids from large follicles (>16 mm) were pooled and granulosa cells (GCs) were isolated using cell strainer methodology. Apoptosis of purified GCs was measured by flow cytometry using Annexin V and propidium iodide. Quantitative real-time PCR and western blotting were performed to assess alteration of FoxO3 expression and phosphorylation in GCs.

Results

There were higher percentages of early and late apoptosis in GCs of PCOS patients than in the control group. FoxO3 mRNA level and total FoxO3 protein were significantly higher in PCOS group than in the control group. The ratio of p-FoxO3/total FoxO3 decreased significantly in PCOS than in the control group. It was inferred that unphosphorylated (active form) FoxO3 was higher in GCs of PCOS patients. Apoptosis was significantly and positively correlated with the total FoxO3 and negatively correlated with the p-FoxO3 protein levels in PCOS patients.

Conclusions

Activation and overexpression of FoxO3 in granulosa cells of PCOS women correlated with higher apoptosis levels in these cells suggesting that FoxO3 may be a candidate for the higher apoptosis in granulosa cells from women with PCOS.

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Titel: Altered FoxO3 expression and apoptosis in granulosa cells of women with polycystic ovary syndrome
verfasst von: Saideh Mikaeili
Batool Hossein Rashidi
Majid Safa
Atefeh Najafi
Aligholi Sobhani
Ebrahim Asadi
Mehdi Abbasi
Publikationsdatum: 18.03.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Archives of Gynecology and Obstetrics / Ausgabe 1/2016
Print ISSN: 0932-0067
Elektronische ISSN: 1432-0711
DOI: https://doi.org/10.1007/s00404-016-4068-z

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Altered FoxO3 expression and apoptosis in granulosa cells of women with polycystic ovary syndrome