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Mol Cell Endocrinol. 2018 Jul 15;470:199-207. doi: 10.1016/j.mce.2017.10.016. Epub 2017 Oct 31.

High-fat diet exposure, regardless of induction of obesity, is associated with altered expression of genes critical to normal ovulatory function.

Author information

1
Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, 12700 East 19th Ave, Aurora, CO, 80045, USA.
2
Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, 12700 East 19th Ave, Aurora, CO, 80045, USA; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, 12700 East 19th Ave, Aurora, CO, 80045, USA. Electronic address: malgorzata.skaznik-wikiel@ucdenver.edu.

Abstract

We evaluated the impact of high-fat diet (HFD) on ovarian gene expression. Female 5-week-old C57BL/6J mice were fed a 60% HFD or standard chow for 10 weeks. HFD-fed mice were then separated into obese (HF-Ob) and lean (HF-Ln) based on body weight. HFD exposure led to impairment of the estrous cycle, changes in hormones affecting reproduction, and decreased primordial follicles regardless of the development of obesity. RNA-sequencing of whole ovaries identified multiple genes with altered expression after HFD, with 25 genes displaying decreased expression in both HF-Ln and HF-Ob mice compared to the chow-fed controls (q < 0.05). Several of these 25 genes are involved in normal ovarian functions, including ovulation (Edn2, Tnfaip6, Errfi1, Prkg2, and Nfil3), luteinization (Edn2), and luteolysis (Nr4a1). Taken together, elevated dietary fat intake, regardless of obesity, is associated with impaired estrous cycle, depletion of the ovarian reserve, and altered expression of genes critical to normal ovulatory function.

KEYWORDS:

Female fertility; High-fat diet; Obesity; Ovary; RNA sequencing

PMID:
29097167
DOI:
10.1016/j.mce.2017.10.016
[Indexed for MEDLINE]

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