Overview
- A peer-reviewed mouse study led by Francesca Duncan used microscopy and bulk RNA sequencing to compare ovaries from young, middle-aged, and post-reproductive mice and found a clear transcriptomic shift away from reproductive genes toward immune-related genes.
- Post-reproductive mouse ovaries showed loss of follicles, increased collagen, and infiltration by T cells, macrophages, and multinucleated giant cells, alongside higher expression of pro-inflammatory transcripts that could be secreted.
- A complementary human proteomic analysis reported differences in 177 proteins between older and younger postmenopausal groups, including more inflammation-related proteins in women over 70, but that human work is still under peer review and has limited sample information.
- Translational caution is needed because mice do not experience the sharp postmenopausal estrogen drop that humans do and because the human proteomic data remain preliminary and limited in scope.
- If validated in people, the finding that ovaries acquire an immune identity could affect postmenopausal care and decisions about elective ovary removal and will prompt more research into whether ovarian immune remodeling influences whole-body aging.