Moringa oleifera leaf attenuate osteoporosis in ovariectomized rats by modulating gut microbiota composition and MAPK signaling pathway

Moringa oleifera leaf powder demonstrated significant protective effects against bone loss in a rat model of postmenopausal osteoporosis. Researchers used ovariectomized rats (surgical removal of ovaries to mimic menopause) and found that moringa supplementation increased bone mineral density and improved bone structure compared to untreated controls. The study revealed that moringa's bone-protective effects work through two main mechanisms: improving gut bacteria composition and modulating cellular signaling pathways involved in bone formation. Specifically, moringa enhanced the gut barrier by increasing proteins that seal intestinal walls (Occludin and Claudin-1) and altered the MAPK signaling pathway in bone tissue by increasing beneficial ERK and VAV3 proteins while decreasing harmful p-ERK and JNK proteins. The researchers used advanced techniques including network pharmacology to identify 97 active compounds in moringa and 478 potential targets for osteoporosis treatment, with molecular docking studies confirming how specific moringa compounds interact with key bone metabolism proteins. This research is significant because it provides the first comprehensive evidence for how moringa prevents bone loss, suggesting potential applications for postmenopausal women at risk of osteoporosis, though human studies are needed to confirm these effects.