Decreased expression of m 6 A demethylase FTO in ovarian aging
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GYNECOLOGIC ENDOCRINOLOGY AND REPRODUCTIVE MEDICINE
Decreased expression of m6A demethylase FTO in ovarian aging Xiaoyan Sun1,2 · Yigan Zhang1 · Yuping Hu1,2 · Junxia An1,2 · Lifei Li1,2 · Yiqing Wang2,3 · Xuehong Zhang2,3 Received: 14 September 2020 / Accepted: 9 November 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose N6-methyladenosine (m6A) and demethylase fat mass and obesity-associated protein (FTO) were reported to be associated with oocyte development and maturation. But the relationship between FTO and ovarian aging was still unclear. This study was aimed at investigating the FTO expression level and the m6A content during ovarian aging. Methods The expression level of FTO and the content of m 6A RNA methylation in human follicular fluid (FF), granulosa cells (GCs) and mouse ovary from different age groups were studied by ELISA, WB, qRT-PCR, IHC and m 6A Colorimetric. Results Human FF ELISA quantified that the level of FTO protein decreased with age (P = 0.025). QRT-PCR results showed that the relative expression of FTO in human GCs was lower in the elderly group than in the young group (P = 0.012). FTO mRNA and protein expression levels were lower in the ovary of 32-week-old mice than in 3- and 8-week-old mice (P
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