Ping Fan1, Nan Hu1, Xiuyuan Feng1, Yining Sun1, Dan Pu1, Xiaohong Lv1, Zhiming Hao1, Yang Li2, Wujun Xue2, Lan He1. 1. Department of Rheumatism and Immunology, The First Affiliated Hospital Xi'an Jiaotong University, Xi'an, China. 2. Department of Renal Transplantation, Center of Nephrology, The First Affiliated Hospital Xi'an Jiaotong University, Xi'an, China.
Abstract
BACKGROUND: Osteoporosis (OP) is a systemic osteopathy with increased bone fragility and increased risk of fracture. Osteoclasts (OC) are the key target cells in the treatment of osteoporosis. We aimed to research the role of L-type calcium channel protein Cav1.3 in OC differentiation in this study. METHODS: OP rat model was established to detect the expression level of Cav1.3. Tartrate-resistant acid phosphatase assay was used to measure the differentiation of osteoclast during receptor activator of nuclear factor κ-Β ligand (RANKL)-induced osteoclasts formation. The expression of bone differentiation-related proteins were detected by western blot analysis. RESULTS: Cav1.3 is upregulated in OP rats. Knockdown of Cav1.3 inhibits the differentiation of RAW264.7. Cav1.3 regulates the cell differentiation and bone resorption of RAW264.7 during RANKL-induced osteoclasts formation, which is accompanied by upregulation of CaMK II, p-CERB, AP-1, NFATC1, and NF-κB. CONCLUSION: Cav1.3 plays an important role in osteoporosis and the differentiation of osteoclast, which might be involved with the bone differentiation-related proteins.
BACKGROUND:Osteoporosis (OP) is a systemic osteopathy with increased bone fragility and increased risk of fracture. Osteoclasts (OC) are the key target cells in the treatment of osteoporosis. We aimed to research the role of L-type calcium channel protein Cav1.3 in OC differentiation in this study. METHODS: OP rat model was established to detect the expression level of Cav1.3. Tartrate-resistant acid phosphatase assay was used to measure the differentiation of osteoclast during receptor activator of nuclear factor κ-Β ligand (RANKL)-induced osteoclasts formation. The expression of bone differentiation-related proteins were detected by western blot analysis. RESULTS:Cav1.3 is upregulated in OP rats. Knockdown of Cav1.3 inhibits the differentiation of RAW264.7. Cav1.3 regulates the cell differentiation and bone resorption of RAW264.7 during RANKL-induced osteoclasts formation, which is accompanied by upregulation of CaMK II, p-CERB, AP-1, NFATC1, and NF-κB. CONCLUSION:Cav1.3 plays an important role in osteoporosis and the differentiation of osteoclast, which might be involved with the bone differentiation-related proteins.
Authors: Christian S Wright; Alexander G Robling; Mary C Farach-Carson; William R Thompson Journal: Curr Osteoporos Rep Date: 2021-03-15 Impact factor: 5.096