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Apocynin exerts cytoprotective effects on dexamethasone‐induced osteoblasts by inhibiting oxidative stress through the Nrf2 signalling pathway
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Apocynin exerts cytoprotective effects on dexamethasone‐induced osteoblasts by inhibiting oxidative stress through the Nrf2 signalling pathway
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Apocynin exerts cytoprotective effects on dexamethasone‐induced osteoblasts by inhibiting oxidative stress through the Nrf2 signalling pathway
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Journal Article
Apocynin exerts cytoprotective effects on dexamethasone‐induced osteoblasts by inhibiting oxidative stress through the Nrf2 signalling pathway
2023
Overview
Steroid‐induced femoral head necrosis (SIFHN) is a serious clinical complication that is caused by prolonged or excessive use of glucocorticoids (GCs). Osteoblast apoptosis and osteogenic differentiation dysfunction caused by GC‐induced oxidative stress and mitochondrial impairment are strongly implicated in SIFHN. Apocynin (APO) is a kind of acetophenone extracted from an herb. In recent years, APO has received much attention for its antiapoptotic and antioxidant properties. This study aimed to investigate whether APO could protect against SIFHN and explore the mechanism. In our study, low‐dose APO had no toxic effects on osteoblasts and restored dexamethasone (Dex)‐treated osteoblasts by improving survival, inhibiting OS and restoring mitochondrial dysfunction. Mechanistically, APO alleviated Dex‐induced osteoblast injury by activating the Nrf2 pathway, and the use of ML385 to block Nrf2 significantly eliminated the protective effect of APO. In addition, APO could reduce the formation of empty lacunae, restore bone mass and promote the expression of Nrf2 in SIFHN rats. In conclusion, APO protects osteoblasts from Dex‐induced oxidative stress and mitochondrial dysfunction through activation of the Nrf2 pathway and may be a beneficial drug for the treatment of SIFHN.
