A study published in Nature Aging has identified a potential mechanism by which physical activity may delay ovarian aging, and a drug that could replicate those benefits. The research, led by Biao Li, Nana Zheng, and Tong Luo at Guangzhou Medical University, involved experiments on female mice and analysis of human population data.
In the mouse experiments, those that ran on a treadmill for a month showed more ovarian follicles and a lower loss of primordial follicles, the ovary's reserve of immature eggs. When mice were given the experimental drug AdipoRon, which stimulates adiponectin receptors, their reproductive lifespan extended. Untreated mice typically stopped reproducing around 12 months of age, while treated mice continued until up to 15 months. The drug also increased total ovarian follicle count and levels of anti-Müllerian hormone (AMH), a marker of ovarian reserve.
Further experiments showed that the protective effect of exercise against follicle loss fell by 76 percent when adiponectin production in the ovaries was reduced, indicating the hormone plays a key role. In human data from the UK Biobank, women carrying genetic variants linked to higher adiponectin levels experienced menopause about a month later on average. Premenopausal women in UK and US studies reported higher physical activity levels than postmenopausal women, and higher activity was associated with later menopause in the UK cohort.
The authors caution that animal experiments may not fully reflect human ovarian aging, and that they cannot definitively claim physical activity prevents menopause. AdipoRon remains in preclinical development. Biologist Philipp Scherer, who was not involved in the study, called the research "a well-performed, very exciting addition to the field" and noted its relevance as more women delay childbearing.
"By confirming the protective effects of physical activity on ovarian aging, this study contributes to the broader understanding that physical activity can delay aging in multiple organs," the authors wrote. Longer-term studies and randomized trials are needed before exercise interventions and AdipoRon.[/p]
