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Scopolamine mitigates oophorectomy-induced osteoporosis: potential mechanisms and direct effects on bone structure
Tianyi Dai1,2, Peipei Jiang3, Xiaofeng Liu4
1Nanjing University of Chinese Medicine, Jiangsu Province, China.
Abstract:
The aim of our research is to investigate the therapeutic effects of scopolamine (SCO) on osteoporosis and to explore the underlying mechanism. To study osteoporosis, we established an ovariectomy (OVX) model. The rats were divided into four groups: sham operation, OVX, OVX+SCO, and OVX+SCO+ML385 (Nrf2 inhibitor). ELISA, Realtime PCR, Western blot, and kits were utilised to assess the expression of related proteins and substances. The OVX rats exhibited significant weight gain, reduced bone volume, destruction of trabecular and cortical bone microstructure, decreased expression of ALP, OCN, OPN, COL1A1, Runx2, Nrf2 proteins, and CAT, SOD, GST, GPX levels while increased expression of TRAP protein and ROS levels. SCO was able to restore these indices in OVX rats, while ML385 blocked the effects of SCO. In conclusion, SCO inhibits oxidative stress response to exert therapeutic effects on osteoporosis by activating the Nrf2 signalling pathway.
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