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Xu Q, Kong F, Zhao G, Jin J, Feng S, Li M. USP7 alleviates neuronal inflammation and apoptosis in spinal cord injury via deubiquitinating NRF1/KLF7 axis. Neurol Res 2024:1-10. [PMID: 39007840 DOI: 10.1080/01616412.2024.2376999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 07/02/2024] [Indexed: 07/16/2024]
Abstract
BACKGROUND Ubiquitin-specific protease 7 (USP7) has been found to be associated with motor function recovery after spinal cord injury (SCI). Therefore, its role and mechanism in SCI process need further exploration. METHODS SCI rat models were established via performing laminectomy at the T9-T11 spinal vertebrae and cutting spinal cord tissues. SCI cell models were constructed by inducing PC12 cells with lipopolysaccharide (LPS). The protein levels of USP7, nuclear respiratory factor 1 (NRF1), Krüppel-like factor 7 (KLF7) and apoptosis-related markers were detected by western blot. Cell viability and apoptosis were tested by cell counting kit-8 assay and flow cytometry. The contents of inflammatory factors were examined using ELISA. The interaction between NRF1 and USP7 or KLF7 was analyzed by co-immunoprecipitation assay, chromatin immunoprecipitation assay and dual-luciferase reporter assay, respectively. RESULTS USP7 was downregulated in SCI rat models and LPS-induced PC12 cells. Overexpressed USP7 promoted viability, while repressed apoptosis and inflammation in LPS-induced PC12 cells. USP7 could stabilize NRF1 protein expression via deubiquitination, and NRF1 knockdown reversed the protective effect of USP7 against LPS-induced PC12 cell injury. NRF1 is bound to KLF7 promoter to enhance its transcription. NRF1 overexpression inhibited LPS-induced PC12 cell inflammation and apoptosis via increasing KLF7 expression. CONCLUSION USP7 alleviated inflammation and apoptosis in LPS-induced PC12 cells via NRF1/KLF7 axis, indicating that targeting of USP7/NRF1/KLF7 axis might be a promising treatment strategy for SCI.
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Affiliation(s)
- Qifei Xu
- Department of Orthopedics, The First People's Hospital of Pingdingshan, Pingdingshan, China
| | - Fanguo Kong
- Department of Orthopedics, Henan Provincial Orthopedic Hospital, Zhengzhou, China
| | - Guanghui Zhao
- Department of Orthopedics, The First People's Hospital of Pingdingshan, Pingdingshan, China
| | - Junwei Jin
- Department of Orthopedics, The First People's Hospital of Pingdingshan, Pingdingshan, China
| | - Shengkai Feng
- Department of Orthopedics, The First People's Hospital of Pingdingshan, Pingdingshan, China
| | - Ming Li
- Department of Orthopedics, The First People's Hospital of Pingdingshan, Pingdingshan, China
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Liu Z, Wu J, Dong Z, Wang Y, Wang G, Chen C, Wang H, Yang Y, Sun Y, Yang M, Fu J, Li J, Zhang Q, Xu Y, Pi J. Prolonged Cadmium Exposure and Osteoclastogenesis: A Mechanistic Mouse and in Vitro Study. ENVIRONMENTAL HEALTH PERSPECTIVES 2024; 132:67009. [PMID: 38896780 PMCID: PMC11218709 DOI: 10.1289/ehp13849] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 03/28/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024]
Abstract
BACKGROUND Cadmium (Cd) is a highly toxic and widespread environmental oxidative stressor that causes a myriad of health problems, including osteoporosis and bone damage. Although nuclear factor erythroid 2-related factor 2 (NRF2) and its Cap 'n' Collar and basic region Leucine Zipper (CNC-bZIP) family member nuclear factor erythroid 2-related factor 1 (NRF1) coordinate various stress responses by regulating the transcription of a variety of antioxidant and cytoprotective genes, they play distinct roles in bone metabolism and remodeling. However, the precise roles of both transcription factors in bone loss induced by prolonged Cd exposure remain unclear. OBJECTIVES We aimed to understand the molecular mechanisms underlying Cd-induced bone loss, focusing mainly on the roles of NRF2 and NRF1 in osteoclastogenesis provoked by Cd. METHODS Male wild-type (WT), global Nrf2-knockout (N r f 2 - / - ) and myeloid-specific Nrf2 knockout [Nrf2(M)-KO] mice were administered Cd (50 or 100 ppm ) via drinking water for 8 or 16 wk, followed by micro-computed tomography, histological analyses, and plasma biochemical testing. Osteoclastogenesis was evaluated using bone marrow-derived osteoclast progenitor cells (BM-OPCs) and RAW 264.7 cells in the presence of Cd (10 or 20 nM ) with a combination of genetic and chemical modulations targeting NRF2 and NRF1. RESULTS Compared with relevant control mice, global N r f 2 - / - or Nrf2(M)-KO mice showed exacerbated bone loss and augmented osteoclast activity following exposure to 100 ppm Cd in drinking water for up to 16 wk. In vitro osteoclastogenic analyses suggested that Nrf2-deficient BM-OPCs and RAW 264.7 cells responded more robustly to low levels of Cd (up to 20 nM ) with regard to osteoclast differentiation compared with WT cells. Further mechanistic studies supported a compensatory up-regulation of long isoform of NRF1 (L-NRF1) and subsequent induction of nuclear factor of activated T cells, cytoplasmic, calcineurin dependent 1 (NFATc1) as the key molecular events in the Nrf2 deficiency-worsened and Cd-provoked osteoclastogenesis. L-Nrf1 silenced (via lentiviral means) Nrf2-knockdown (KD) RAW cells exposed to Cd showed dramatically different NFATc1 and subsequent osteoclastogenesis outcomes compared with the cells of Nrf2-KD alone exposed to Cd, suggesting a mitigating effect of the Nrf1 silencing. In addition, suppression of reactive oxygen species by exogenous antioxidants N -acetyl-l-cysteine (2 mM ) and mitoquinone mesylate (MitoQ; 0.2 μ M ) mitigated the L-NRF1-associated effects on NFATc1-driven osteoclastogenesis outcomes in Cd-exposed Nrf2-KD cells. CONCLUSIONS This in vivo and in vitro study supported the authors' hypothesis that Cd exposure caused bone loss, in which NRF2 and L-NRF1 responded to Cd and osteoclastogenic stimuli in a cooperative, but contradictive, manner to coordinate Nfatc1 expression, osteoclastogenesis and thus bone homeostasis. Our study suggests a novel strategy targeting NRF2 and L-NRF1 to prevent and treat the bone toxicity of Cd. https://doi.org/10.1289/EHP13849.
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Affiliation(s)
- Zhiyuan Liu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Jinzhi Wu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Zhe Dong
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Yanshuai Wang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Gang Wang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Experimental and Teaching Center, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Chengjie Chen
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Huihui Wang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Group of Chronic Disease and Environmental Genomics, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Yang Yang
- Department of Rehabilitation Medicine, First Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Yongxin Sun
- Department of Rehabilitation Medicine, First Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Maowei Yang
- Department of Orthopedics, First Hospital of China Medical University, Shenyang, Liaoning, P.R. China
| | - Jingqi Fu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Jiliang Li
- Department of Biology, Indiana University Indianapolis, Indianapolis, Indiana, USA
| | - Qiang Zhang
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
| | - Yuanyuan Xu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Group of Chronic Disease and Environmental Genomics, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
| | - Jingbo Pi
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang, Liaoning, P.R. China
- Key Laboratory of Liaoning Province on Toxic and Biological Effects of Arsenic, China Medical University, Shenyang, Liaoning, P.R. China
- Program of Environmental Toxicology, School of Public Health, China Medical University, Shenyang, Liaoning, P.R. China
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Cai L. Invited Perspective: New Insight into Cadmium-Related Osteoporosis Yields Hope for Prevention and Therapy. ENVIRONMENTAL HEALTH PERSPECTIVES 2024; 132:61301. [PMID: 38896781 PMCID: PMC11218703 DOI: 10.1289/ehp15263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/28/2024] [Accepted: 05/30/2024] [Indexed: 06/21/2024]
Affiliation(s)
- Lu Cai
- Pediatric Research Institute, Department of Pediatrics, University of Louisville (U of L) School of Medicine, Louisville, Kentucky, USA
- Department of Radiation Oncology, U of L School of Medicine, Louisville, Kentucky, USA
- Department of Pharmacology and Toxicology, U of L School of Medicine, Louisville, Kentucky, USA
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Tao H, Li X, Wang Q, Yu L, Yang P, Chen W, Yang X, Zhou J, Geng D. Redox signaling and antioxidant defense in osteoclasts. Free Radic Biol Med 2024; 212:403-414. [PMID: 38171408 DOI: 10.1016/j.freeradbiomed.2023.12.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/25/2023] [Accepted: 12/28/2023] [Indexed: 01/05/2024]
Abstract
Bone remodeling is essential for the repair and replacement of damaged or aging bones. Continuous remodeling is necessary to prevent the accumulation of bone damage and to maintain bone strength and calcium balance. As bones age, the coupling mechanism between bone formation and absorption becomes dysregulated, and bone loss becomes dominant. Bone development and repair rely on interaction and communication between osteoclasts and surrounding cells. Osteoclasts are specialized cells that are accountable for bone resorption and degradation, and any abnormalities in their activity can result in notable alterations in bone structure and worsen disease symptoms. Recent findings from transgenic mouse models and bone analysis have greatly enhanced our understanding of the origin, differentiation pathway, and activation stages of osteoclasts. In this review, we explore osteoclasts and discuss the cellular and molecular events that drive their generation, focusing on intracellular oxidative and antioxidant signaling. This knowledge can help develop targeted therapies for diseases associated with osteoclast activation.
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Affiliation(s)
- Huaqiang Tao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Xuefeng Li
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Qiufei Wang
- Department of Orthopedics, Changshu Hospital Affiliated to Soochow University, First People's Hospital of Changshu City, Changshu, Jiangsu, China
| | - Lei Yu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Peng Yang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Wenlong Chen
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Xing Yang
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China.
| | - Jun Zhou
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China.
| | - Dechun Geng
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China.
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Tao H, Li X, Chu M, Wang Q, Li P, Han Q, Chen K, Zhu P, Hao Y, Yang X, Geng D, Gu Y. CB2 regulates oxidative stress and osteoclastogenesis through NOX1-dependent signaling pathway in titanium particle-induced osteolysis. Cell Death Discov 2023; 9:461. [PMID: 38104087 PMCID: PMC10725463 DOI: 10.1038/s41420-023-01761-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 11/29/2023] [Accepted: 12/06/2023] [Indexed: 12/19/2023] Open
Abstract
Periprosthetic osteolysis (PPO) induced by wear particles at the interface between the prosthesis and bone is a crucial issue of periprosthetic bone loss and implant failure. After wear and tear, granular material accumulates around the joint prosthesis, causing a chronic inflammatory response, progressive osteoclast activation and eventual loosening of the prosthesis. Although many studies have been conducted to address bone loss after joint replacement surgeries, they have not fully addressed these issues. Focusing on osteoclast activation induced by particles has important theoretical implications. Cannabinoid type II receptor (CB2) is a seven-transmembrane receptor that is predominantly distributed in the human immune system and has been revealed to be highly expressed in bone-associated cells. Previous studies have shown that modulation of CB2 has a positive effect on bone metabolism. However, the exact mechanism has not yet been elucidated. In our experiments, we found that NOX1-mediated ROS accumulation was involved in titanium particle-stimulated osteoclast differentiation. Furthermore, we confirmed that CB2 blockade alleviated titanium particle-stimulated osteoclast activation by inhibiting the NOX1-mediated oxidative stress pathway. In animal experiments, downregulation of CB2 alleviated the occurrence of titanium particle-induced cranial osteolysis by inhibiting osteoclasts and scavenging intracellular ROS. Collectively, our results suggest that CB2 blockade may be an attractive and promising therapeutic scheme for particle-stimulated osteoclast differentiation and preventing PPO.
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Affiliation(s)
- Huaqiang Tao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Xueyan Li
- Anesthesiology department, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Miao Chu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Qiufei Wang
- Department of Orthopedics, Changshu Hospital Affiliated to Soochow University, First People's Hospital of Changshu City, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Ping Li
- Department of Central Laboratory, Nanjing Medical University Affiliated Suzhou Hospital, Gusu School, Suzhou, Jiangsu, China
| | - Qibin Han
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Kai Chen
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Pengfei Zhu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China
| | - Yuefeng Hao
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China
| | - Xing Yang
- Orthopedics and Sports Medicine Center, Suzhou Municipal Hospital, Nanjing Medical University Affiliated Suzhou Hospital, 242, Guangji Road, Suzhou, Jiangsu, China.
| | - Dechun Geng
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, No. 188 Shizi Street, Suzhou, Jiangsu, China.
| | - Ye Gu
- Department of Orthopedics, Changshu Hospital Affiliated to Soochow University, First People's Hospital of Changshu City, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
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Yang J, Jiang T, Xu G, Wang S, Liu W. Exploring molecular mechanisms underlying the pathophysiological association between knee osteoarthritis and sarcopenia. Osteoporos Sarcopenia 2023; 9:99-111. [PMID: 37941536 PMCID: PMC10627980 DOI: 10.1016/j.afos.2023.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/25/2023] [Accepted: 08/31/2023] [Indexed: 11/10/2023] Open
Abstract
Objectives Accumulating evidence indicates a strong link between knee osteoarthritis (KOA) and sarcopenia. However, the mechanisms involved have not yet been elucidated. This study primarily aims to explore the molecular mechanisms that explain the connection between these 2 disorders. Methods The gene expression profiles for KOA and sarcopenia were obtained from the Gene Expression Omnibus database, specifically from GSE55235, GSE169077, and GSE1408. Various bioinformatics techniques were employed to identify and analyze common differentially expressed genes (DEGs) across the 3 datasets. The techniques involved the analysis of Gene Ontology and pathways to enhance understanding, examining protein-protein interaction (PPI) networks, and identifying hub genes. In addition, we constructed the network of interactions between transcription factors (TFs) and genes, the co-regulatory network of TFs and miRNAs for hub genes, and predicted potential drugs. Results In total, 14 common DEGs were found between KOA and sarcopenia. Detailed information on biological processes and signaling pathways of common DEGs was obtained through enrichment analysis. After performing PPI network analysis, we discovered 4 hub genes (FOXO3, BCL6, CDKN1A, and CEBPB). Subsequently, we developed coregulatory networks for these hub genes involving TF-gene and TF-miRNA interactions. Finally, we identified 10 potential chemical compounds. Conclusions By conducting bioinformatics analysis, our study has successfully identified common gene interaction networks between KOA and sarcopenia. The potential of these findings to offer revolutionary understanding into the common development of these 2 conditions could lead to the identification of valuable targets for therapy.
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Affiliation(s)
- Jiyong Yang
- The Fifth Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tao Jiang
- Department of Orthopedics, Guangdong Second Traditional Chinese Medicine Hospital, Guangzhou, China
| | - Guangming Xu
- Department of Orthopedics, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, China
| | - Shuai Wang
- The Fifth Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wengang Liu
- Department of Orthopedics, Guangdong Second Traditional Chinese Medicine Hospital, Guangzhou, China
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Zhu Q, Tan M, Wang C, Chen Y, Wang C, Zhang J, Gu Y, Guo Y, Han J, Li L, Jiang R, Fan X, Xie H, Wang L, Gu Z, Liu D, Shi J, Feng X. Single-cell RNA sequencing analysis of the temporomandibular joint condyle in 3 and 4-month-old human embryos. Cell Biosci 2023; 13:130. [PMID: 37468984 DOI: 10.1186/s13578-023-01069-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 06/13/2023] [Indexed: 07/21/2023] Open
Abstract
BACKGROUND The temporomandibular joint (TMJ) is a complex joint consisting of the condyle, the temporal articular surface, and the articular disc. Functions such as mastication, swallowing and articulation are accomplished by the movements of the TMJ. To date, the TMJ has been studied more extensively, but the types of TMJ cells, their differentiation, and their interrelationship during growth and development are still unclear and the study of the TMJ is limited. The aim of this study was to establish a molecular cellular atlas of the human embryonic temporomandibular joint condyle (TMJC) by single-cell RNA sequencing, which will contribute to understanding and solving clinical problems. RESULTS Human embryos at 3 and 4 months of age are an important stage of TMJC development. We performed a comprehensive transcriptome analysis of TMJC tissue from human embryos at 3 and 4 months of age using single-cell RNA sequencing. A total of 16,624 cells were captured and the gene expression profiles of 15 cell clusters in human embryonic TMJC were determined, including 14 known cell types and one previously unknown cell type, "transition state cells (TSCs)". Immunofluorescence assays confirmed that TSCs are not the same cell cluster as mesenchymal stem cells (MSCs). Pseudotime trajectory and RNA velocity analysis revealed that MSCs transformed into TSCs, which further differentiated into osteoblasts, hypertrophic chondrocytes and tenocytes. In addition, chondrocytes (CYTL1high + THBS1high) from secondary cartilage were detected only in 4-month-old human embryonic TMJC. CONCLUSIONS Our study provides an atlas of differentiation stages of human embryonic TMJC tissue cells, which will contribute to an in-depth understanding of the pathophysiology of the TMJC tissue repair process and ultimately help to solve clinical problems.
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Affiliation(s)
- Qianqi Zhu
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Miaoying Tan
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Chengniu Wang
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, 226001, China
| | - Yufei Chen
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, 226001, China
| | - Chenfei Wang
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Junqi Zhang
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Yijun Gu
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Yuqi Guo
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Jianpeng Han
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Lei Li
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Rongrong Jiang
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Xudong Fan
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Huimin Xie
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Liang Wang
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China
| | - Zhifeng Gu
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China.
| | - Dong Liu
- School of Life Science, Nantong Laboratory of Development and Diseases Second Affiliated Hospital Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226019, China.
| | - Jianwu Shi
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong, 226001, China.
| | - Xingmei Feng
- Department of Stomatology, Affiliated Hospital of Nantong University, Medical School of, Nantong University, Nantong, 226001, China.
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Probucol suppresses osteoclastogenesis via activating Nrf2 signaling and ameliorates ovariectomy-induced bone loss. Int Immunopharmacol 2023; 116:109820. [PMID: 36758295 DOI: 10.1016/j.intimp.2023.109820] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/18/2023] [Accepted: 01/28/2023] [Indexed: 02/09/2023]
Abstract
Osteoporosis is a systemic and endocrine bone disorder distinguished by declined bone mineral density, compromised bone strength, and destruction of trabecular structure. The abnormally excessive osteoclastogenesis and bone erosion play imperative roles in the progression of osteoporosis. However, treatment of osteoporosis is far from satisfactory due to poor adherence to existing medications and adverse reactions, there is an urgent to develop novel therapies for osteoporosis. Probucol, a synthetic compound with two characteristic phenolic rings, owns anti-inflammatory and antioxidant properties. Accumulating evidence have indicated that intracellular reactive oxygen species (ROS) is closely related to osteoclastogenesis. Hence, we investigated the potential effects of probucol on osteoclastogenesis in vivo and in vitro. In this study, TRAP staining and bone slice resorption assay showed that probucol suppressed RANKL-induced osteoclast formation and function. The mRNA and protein levels of osteoclastogenesis marker genes were reduced by probucol in a concentration-dependent manner. Besides, probucol suppressed osteoclast differentiation by inhibiting ROS production, MAPKs and NF-κB signaling pathways, while Nrf2 silencing reversed the inhibitory effect of probucol on osteoclast formation and function. Consistent with the above findings, in vivo experiments demonstrated that probucol visibly alleviated bone loss caused by estrogen deficiency. In brief, these results showed the potential of anti-oxidant compound probucol in the treatment of osteoporosis, highlighting Nrf2 as a promising target in osteoclast-related disease.
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Yan C, Shi Y, Yuan L, Lv D, Sun B, Wang J, Liu X, An F. Mitochondrial quality control and its role in osteoporosis. Front Endocrinol (Lausanne) 2023; 14:1077058. [PMID: 36793284 PMCID: PMC9922754 DOI: 10.3389/fendo.2023.1077058] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 01/16/2023] [Indexed: 01/31/2023] Open
Abstract
Mitochondria are important organelles that provide cellular energy and play a vital role in cell differentiation and apoptosis. Osteoporosis is a chronic metabolic bone disease mainly caused by an imbalance in osteoblast and osteoclast activity. Under physiological conditions, mitochondria regulate the balance between osteogenesis and osteoclast activity and maintain bone homeostasis. Under pathological conditions, mitochondrial dysfunction alters this balance; this disruption is important in the pathogenesis of osteoporosis. Because of the role of mitochondrial dysfunction in osteoporosis, mitochondrial function can be targeted therapeutically in osteoporosis-related diseases. This article reviews different aspects of the pathological mechanism of mitochondrial dysfunction in osteoporosis, including mitochondrial fusion and fission, mitochondrial biogenesis, and mitophagy, and highlights targeted therapy of mitochondria in osteoporosis (diabetes induced osteoporosis and postmenopausal osteoporosis) to provide novel targets and prevention strategies for the prevention and treatment of osteoporosis and other chronic bone diseases.
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Affiliation(s)
- Chunlu Yan
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- Research Center of Traditional Chinese Medicine of Gansu, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Yao Shi
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Lingqing Yuan
- School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Donghui Lv
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Bai Sun
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Jiayu Wang
- School of Traditional Chinese and Western Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Xiyan Liu
- Internal Medicine, Northwestern University, Xian, Shanxi, China
- *Correspondence: Xiyan Liu, ; Fangyu An,
| | - Fangyu An
- Teaching Experiment Training Center, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
- *Correspondence: Xiyan Liu, ; Fangyu An,
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