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Published on: April 7, 2023
Quercitrin attenuates osteoporosis in ovariectomized rats by regulating mitogen-activated protein kinase (MAPK)
Li-Zhi Xing1, Huai-Jun Ni2, Yu-Ling Wang3
1Department of Endocrinolog, Linyi People's Hospital, Linyi 276000, Shandong, China.
Abstract:
MAPK signaling pathways are crucial in regulating osteogenesis, a genetic disorder affecting the bones. Quercitrin, a type of flavonoid, is widely distributed in nature and involved in many pharmacological activities. But its osteoprotective functions and mechanism in osteoporosis are far from being understood clearly. In this paper, the MAPK upregulation was observed in the ovariectomy-induced bone loss. Quercitrin was found to downregulate MAPK signaling pathways and prevent the ovariectomy-induced deterioration of bone mineral density (BMD), trabecular microstructure, and bone mechanical characteristics. In this study, quercitrin was seen to prevent the progression of the postmenopausal osteoporosis among the rats, which may be mediated by the downregulated MAPK signaling pathways.
Insights
Quercitrin, a natural flavonoid, prevents bone loss in osteoporosis by downregulating MAPK signaling pathways. This study reveals its potential as an osteoprotective agent for postmenopausal bone density.
Area of Science:
- Biochemistry
- Pharmacology
- Bone Biology
Background:
- Mitogen-activated protein kinase (MAPK) signaling pathways are critical in osteogenesis and bone metabolism.
- Osteoporosis is a prevalent bone disorder characterized by reduced bone mineral density and microstructural deterioration.
- The osteoprotective mechanisms of quercitrin, a natural flavonoid, in osteoporosis remain largely unclear.
Purpose of the Study:
- To investigate the effects of quercitrin on osteoporosis.
- To elucidate the role of MAPK signaling pathways in quercitrin's osteoprotective effects.
Main Methods:
- Ovariectomy-induced osteoporosis model in rats.
- Assessment of bone mineral density (BMD), trabecular microstructure, and bone mechanical properties.
- Analysis of MAPK signaling pathway activation.
Main Results:
- MAPK signaling pathways were upregulated in the ovariectomy-induced bone loss model.
- Quercitrin treatment downregulated MAPK signaling pathways.
- Quercitrin prevented the deterioration of BMD, trabecular microstructure, and bone mechanical characteristics.
Conclusions:
- Quercitrin exhibits significant osteoprotective effects against postmenopausal osteoporosis in rats.
- The mechanism involves the downregulation of MAPK signaling pathways.
- Quercitrin holds potential as a therapeutic agent for osteoporosis.
