This organoid can menstruate - and shows how tissue can repair itself

Key Points:

• Researchers have developed organoids that mimic the regenerative properties of the endometrium, the uterus lining that sheds and reforms during menstruation, offering a new model to study tissue repair and potential therapeutic strategies.
• The organoids, created from epithelial cells cultured into 3D hollow spheres, were treated with hormones to simulate the menstrual cycle, and mechanical disruption was used to mimic tissue shedding, allowing observation of natural-like regeneration.
• This model is simpler than the full endometrial environment, containing only epithelial cells, but provides a controlled system to dissect the mechanisms of endometrial repair before adding complexity such as immune or stromal cells.
• Findings revealed that luminal epithelial cells, which aid embryo implantation, also play a role in the tissue renewal process, challenging previous assumptions that deep-tissue stem cells alone drive endometrial regeneration.
• The study, published in Cell Stem Cell, could enhance understanding of gynecological conditions like endometriosis and inform broader tissue regeneration and wound healing research.