1
|
Chen Y, Cai Y, Chen C, Li M, Lu L, Yu Z, Wang S, Fang L, Xu S. Aroclor 1254 induced inhibitory effects on osteoblast differentiation in murine MC3T3-E1 cells through oxidative stress. Front Endocrinol (Lausanne) 2022; 13:940624. [PMID: 36353240 PMCID: PMC9637744 DOI: 10.3389/fendo.2022.940624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 10/04/2022] [Indexed: 11/21/2022] Open
Abstract
This study aimed to evaluate the osteotoxicity of polychlorinated biphenyls in murine osteoblastic MC3T3-E1 cells, and to explore the underlying mechanism focused on oxidative stress. The cells were exposed to Aroclor 1254 at concentrations of 2.5-20 µmol/L, and then cell viability, oxidative stress, intracellular calcium concentration, osteocalcin content, and calcium nodules formation were measured. Aroclor 1254 reduced cell viability and induced overproduction of intracellular reactive oxygen species in a dose-dependent manner. Activity of superoxide dismutase was decreased, and malondialdehyde content was promoted after exposure. Moreover, inhibitory effects of Aroclor 1254 on calcium metabolism and mineralization of osteoblasts were observed, as indicated by reduction of the intracellular calcium concentration, osteocalcin content, and modules formation rate. The decreased expression of osteocalcin, alkaline phosphatase, bone sialoprotein, and transient receptor potential vanilloid 6 further confirmed the impairment of Aroclor 1254 on calcium homeostasis and osteoblast differentiation. Addition of the antioxidant N-acetyl-L-cysteine partially restored the inhibitory effects on calcium metabolism and mineralization. In general, Aroclor 1254 exposure reduces calcium homeostasis, osteoblast differentiation and bone formation, and oxidative stress plays a vital role in the underlying molecular mechanism of osteotoxicity.
Collapse
Affiliation(s)
- Yu Chen
- Department of Orthopaedic Surgery (I), Shuguang Hospital, Shanghai University of Chinese Traditional Medicine, Shanghai, China
| | - Yuwei Cai
- Department of Orthopaedic Surgery (I), Shuguang Hospital, Shanghai University of Chinese Traditional Medicine, Shanghai, China
| | - Chunxiang Chen
- Department of Neurology, Yueyang Hospital of Integrated Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mengting Li
- Department of Neurology, Yueyang Hospital of Integrated Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lingdan Lu
- Department of Neurology, Yueyang Hospital of Integrated Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhongxiang Yu
- Department of Orthopaedic Surgery (I), Shuguang Hospital, Shanghai University of Chinese Traditional Medicine, Shanghai, China
| | - Shuqiang Wang
- Department of Orthopaedic Surgery, Yueyang Hospital of Integrated Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lei Fang
- Department of Orthopaedic Surgery (I), Shuguang Hospital, Shanghai University of Chinese Traditional Medicine, Shanghai, China
- *Correspondence: Lei Fang, ; Shengming Xu,
| | - Shengming Xu
- Department of Orthopaedic Surgery (I), Shuguang Hospital, Shanghai University of Chinese Traditional Medicine, Shanghai, China
- *Correspondence: Lei Fang, ; Shengming Xu,
| |
Collapse
|
2
|
Zhou CH, Meng JH, Yang YT, Hu B, Hong JQ, Lv ZT, Chen K, Heng BC, Jiang GY, Zhu J, Cheng ZH, Zhang W, Cao L, Wang W, Shen WL, Yan SG, Wu HB. Cepharanthine Prevents Estrogen Deficiency-Induced Bone Loss by Inhibiting Bone Resorption. Front Pharmacol 2018; 9:210. [PMID: 29636680 PMCID: PMC5880888 DOI: 10.3389/fphar.2018.00210] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 02/26/2018] [Indexed: 12/11/2022] Open
Abstract
Osteoporosis is a common health problem worldwide caused by an imbalance of bone formation vs. bone resorption. However, current therapeutic approaches aimed at enhancing bone formation or suppressing bone resorption still have some limitations. In this study, we demonstrated for the first time that cepharanthine (CEP, derived from Stephania cepharantha Hayata) exerted a protective effect on estrogen deficiency-induced bone loss. This protective effect was confirmed to be achieved through inhibition of bone resorption in vivo, rather than through enhancement of bone formation in vivo. Furthermore, the in vitro study revealed that CEP attenuated receptor activator of nuclear factor κB ligand (RANKL)-induced osteoclast formation, and suppressed bone resorption by impairing the c-Jun N-terminal kinase (JNK) and phosphatidylinositol 3-kinase (PI3K)-AKT signaling pathways. The inhibitory effect of CEP could be partly reversed by treatment with anisomycin (a JNK and p38 agonist) and/or SC79 (an AKT agonist) in vitro. Our results thus indicated that CEP could prevent estrogen deficiency-induced bone loss by inhibiting osteoclastogenesis. Hence, CEP might be a novel therapeutic agent for anti-osteoporosis therapy.
Collapse
Affiliation(s)
- Chen-He Zhou
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Jia-Hong Meng
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Yu-Te Yang
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Bin Hu
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Jian-Qiao Hong
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Zheng-Tao Lv
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kun Chen
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Boon Chin Heng
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, Hong Kong
| | - Guang-Yao Jiang
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Jian Zhu
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Zhao-Hui Cheng
- Department of Orthopaedic Surgery, Taizhou First People's Hospital, Taizhou, China
| | - Wei Zhang
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Le Cao
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Wei Wang
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Wei-Liang Shen
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Shi-Gui Yan
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| | - Hao-Bo Wu
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Orthopedic Research Institute of Zhejiang University, Hangzhou, China
| |
Collapse
|