The dual roles of uterine monocytes in regulation of tissue homeostasis throughout reproductive cycles in health and disease.

Uterine monocytes have dual roles in tissue remodeling and inflammation, with their numbers peaking before embryo implantation in humans.

• Why it matters: Understanding how immune cells contribute to uterine tissue integrity is crucial for addressing reproductive health issues and uterine diseases like fibrosis.
• What they did: The study analyzed circulating monocytes infiltrating the uterus and differentiating into macrophages influenced by interferon-γ and transforming growth factor-β, using bioinformatics and human tissue samples.
• The result: Findings suggest monocytes regulate epithelial cell apoptosis and dominate cell interactions, with disruptions in these pathways linked to uterine fibrosis, highlighting their role in tissue homeostasis.