Age-associated decline in oocyte quality is one of the dominant factors of low fertility. Aging alters several key processes, such as telomere lengthening, cell senescence, and cellular longevity of granulosa cells surrounding oocyte. To investigate the age-dependent molecular changes, we examined the expression, localization, and correlation of telomerase reverse transcriptase () and β-Klotho () in bovine granulosa cells, oocytes, and early embryos during the aging process. Herein, cumulus-oocyte complexes (COCs) obtained from aged cows (>120 months) via ovum pick-up (OPU) showed reduced expression of β-Klotho and its co-receptor fibroblast growth factor receptor 1 (FGFR1). plasmid injection into pronuclear zygotes not only markedly enhanced day-8 blastocysts' development competence (39.1 ± 0.8%) compared to the control (31.1 ± 0.5%) and D-galactose (17.9 ± 1.0%) treatment groups but also enhanced and expression. In addition, plasmid-injected zygotes displayed a considerable enhancement in blastocyst quality and implantation potential. Cycloastragenol (CAG), an extract of saponins, stimulates telomerase enzymes and enhances expression and alleviates age-related deterioration in cultured primary bovine granulosa cells. In conclusion, telomerase activation or constitutive expression will increase expression and activate the FGFR1/β-Klotho pathway in bovine granulosa cells and early embryos, inhibiting age-related malfunctioning.
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http://dx.doi.org/10.3390/ijms22105327 | DOI Listing |
Ginekol Pol
January 2025
Department of Clinical Dietetics, Faculty of Health Sciences, Medical University of Warsaw, Poland, Poland.
Anti-Müllerian hormone (AMH), also known as Müller duct inhibitory factor and primarily known for its role in sexual differentiation. In female fetuses, AMH production by granulosa cells begins around the 36th week of gestation and continues in women until menopause. It is becoming more significant in the endocrine and gynecological diagnosis of adult women.
View Article and Find Full Text PDFJ Ovarian Res
January 2025
Department of Reproductive Medicine Center, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China.
Background: Polycystic ovary syndrome (PCOS) is an endocrine disease associated with reproductive and metabolic abnormalities. The aim of this study was to elucidate the effects of Schisandra rubriflora (S. rubriflora) on PCOS and its related mechanisms using network pharmacology, molecular docking and in vitro experiments.
View Article and Find Full Text PDFReprod Sci
January 2025
Department of Physiology, College of Basic Medicine, Chongqing Medical University, Chongqing, 400016, China.
Polycystic ovary syndrome (PCOS) is a prevalent endocrine and metabolic disorder affecting women of reproductive age. Oxidative stress (OS) is suggested to play a significant role in the development of PCOS. Using antioxidants to reduce OS and maintain a healthy balance in the body could be a novel treatment approach for PCOS.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, No. 4110 Yatai Street, Nanguan District, Changchun, Jilin, 130000, China.
Polycystic ovary syndrome (PCOS) is a complex gynecological endocrinological condition that significantly impacts women's fertility during their reproductive lifespan. The causes of PCOS are multifaceted, and its pathogenesis is not yet clear. This study established a rat model of PCOS and, in conjunction with clinical samples and database data, analysed the role of claudin 11 (CLDN11) in follicular granulosa cells (GCs) in regulating the proliferation of GCs.
View Article and Find Full Text PDFTheriogenology
January 2025
Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceará, Sobral, CE, Brazil. Electronic address:
This study aimed to investigate the changes induced by the culture system and the effect of ascorbic acid and resveratrol on collagen fibers, stromal cells, follicle growth and survival, as well as antioxidant enzyme activity in cultured bovine ovarian tissues. In experiment 1, bovine ovarian fragments were cultured in α-minimum essential medium (α-MEM) for 6 days. Before and after culturing, the fragments were fixed and processed to assess follicular morphology and diameters, stromal cell survival, collagen fibers, and glycosaminoglycans (GAGs).
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