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The Contribution of the Sheep and the Goat Model to the Study of Ovarian Ageing

Overview
Journal Biology (Basel)
Publisher MDPI
Specialty Biology
Date 2023 Feb 25
PMID 36829547
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Abstract

Ovarian ageing stands as the major contributor towards fertility loss. As such, there is an urge for studies addressing the mechanisms that promote ovarian ageing and new strategies aiming to delay it. Recently, the presence of a unique population of multinucleated giant cells has been identified in the ovaries of reproductively aged mice. These cells have been considered hallmarks of ovarian ageing. However, up to date multinucleated giant cells have only been described in the ovaries of the mice. Therefore, the aim of the present work was to evaluate and characterize the presence of such hallmarks of ovarian ageing in the sheep and the goat. In this study, ovaries from juvenile (6 months) and mature animals (18-24 months) were used. The hematoxylin and eosin technique was performed to describe the ovarian morphology and evaluate the ovarian follicle reserve pool. Sudan black B staining and the detection of autofluorescence emission were used to identify and characterize the presence of multinucleated giant cells. Statistical analyses were performed with GraphPad Prism 9.0.0. A decrease in the follicle reserve pool and the presence of multinucleated giant cells, with lipofuscin accumulation and the emission of autofluorescence, were observed in the ovaries of the mature animals of both species. Our results support the interest in the use of the ovine and the caprine model, that share physiological and pathophysiological characteristics with humans, in future studies addressing ovarian ageing.

References
1.
Lucci C, Silva R, Carvalho C, Figueiredo R, Bao N . Light microscopical and ultrastructural characterization of goat preantral follicles. Small Rumin Res. 2001; 41(1):61-69. DOI: 10.1016/s0921-4488(01)00196-1. View

2.
Baird D, Campbell B, de Souza C, Telfer E . Long-term ovarian function in sheep after ovariectomy and autotransplantation of cryopreserved cortical strips. Eur J Obstet Gynecol Reprod Biol. 2004; 113 Suppl 1:S55-9. DOI: 10.1016/j.ejogrb.2003.11.023. View

3.
Briley S, Jasti S, McCracken J, Hornick J, Fegley B, Pritchard M . Reproductive age-associated fibrosis in the stroma of the mammalian ovary. Reproduction. 2016; 152(3):245-260. PMC: 4979755. DOI: 10.1530/REP-16-0129. View

4.
Mossa F, Jimenez-Krassel F, Scheetz D, Weber-Nielsen M, Evans A, Ireland J . Anti-Müllerian Hormone (AMH) and fertility management in agricultural species. Reproduction. 2017; 154(1):R1-R11. DOI: 10.1530/REP-17-0104. View

5.
Lim J, Luderer U . Oxidative damage increases and antioxidant gene expression decreases with aging in the mouse ovary. Biol Reprod. 2010; 84(4):775-82. PMC: 3062040. DOI: 10.1095/biolreprod.110.088583. View