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Zhang H, Gu W, Wu G, Yu Y. Aging and Autophagy: Roles in Musculoskeletal System Injury. Aging Dis 2024:AD.2024.0362. [PMID: 38913046 DOI: 10.14336/ad.2024.0362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 06/03/2024] [Indexed: 06/25/2024] Open
Abstract
Aging is a multifactorial process that ultimately leads to a decline in physiological function and a consequent reduction in the health span, and quality of life in elderly population. In musculoskeletal diseases, aging is often associated with a gradual loss of skeletal muscle mass and strength, resulting in reduced functional capacity and an increased risk of chronic metabolic diseases, leading to impaired function and increased mortality. Autophagy is a highly conserved physiological process by which cells, under the regulation of autophagy-related genes, degrade their own organelles and large molecules by lysosomal degradation. This process is unique to eukaryotic cells and is a strict regulator of homeostasis, the maintenance of energy and substance balance. Autophagy plays an important role in a wide range of physiological and pathological processes such as cell homeostasis, aging, immunity, tumorigenesis and neurodegenerative diseases. On the one hand, under mild stress conditions, autophagy mediates the restoration of homeostasis and proliferation, reduction of the rate of aging and delay of the aging process. On the other hand, under more intense stress conditions, an inadequate suppression of autophagy can lead to cellular aging. Conversely, autophagy activity decreases during aging. Due to the interrelationship between aging and autophagy, limited literature exists on this topic. Therefore, the objective of this review is to summarize the current concepts on aging and autophagy in the musculoskeletal system. The aim is to better understand the mechanisms of age-related changes in bone, joint and muscle, as well as the interaction relationship between autophagy and aging. Its goal is to provide a comprehensive perspective for the improvement of diseases of the musculoskeletal system.
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Affiliation(s)
- Haifeng Zhang
- Department of Orthopedics Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenhui Gu
- Department of Physiology and Hypoxic Biomedicine, Institute of Special Environmental Medicine, Nantong University, Nantong, Jiangsu, China
| | - Genbin Wu
- Department of Orthopedics Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yinxian Yu
- Department of Orthopedics Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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2
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Zeng L, Liu Y, Wang Q, Wan H, Meng X, Tu P, Chen H, Luo A, Hu P, Ding X. Botulinum toxin A attenuates osteoarthritis development via inhibiting chondrocyte ferroptosis through SLC7Al1/GPX4 axis. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167215. [PMID: 38714267 DOI: 10.1016/j.bbadis.2024.167215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 04/07/2024] [Accepted: 04/30/2024] [Indexed: 05/09/2024]
Abstract
Osteoarthritis (OA) is a prevalent joint degenerative disease, resulting in a significant societal burden. However, there is currently a lack of effective treatment option available. Previous studies have suggested that Botulinum toxin A (BONT/A), a macromolecular protein extracted from Clostridium Botulinum, may improve the pain and joint function in OA patients, but the mechanism remains elusive. This study was to investigate the impact and potential mechanism of BONT/A on OA in vivo and in vitro experiment. LPS increased the levels of ROS, Fe2+and Fe3+, as well as decreased GSH levels, the ratio of GSH / GSSH and mitochondrial membrane potential. It also enhanced the degeneration of extracellular matrix (ECM) and altered the ferroptosis-related protein expression in chondrocytes. BONT/A rescued LPS-induced decrease in collagen type II (Collagen II) expression and increase in matrix metalloproteinase 13 (MMP13), mitigated LPS-induced cytotoxicity in chondrocytes, abolished the accumulation of ROS and iron, upregulated GSH and the ratio of GSH/ GSSH, improved mitochondrial function, and promoted SLC7A11/GPX4 anti-ferroptosis system activation. Additionally, intra-articular injection of BONT/A inhibited the degradation of cartilage in OA model rats. This chondroprotective effect of BONT/A was reversed by erastin (a classical ferroptosis agonist) and enhanced by liproxstatin-1 (a classic ferroptosis inhibitor). Our research confirms that BONT/A alleviates the OA development by inhibiting the ferroptosis of chondrocytes, which revealed to be a potential therapeutic mechanism for BONT/A treating the OA.
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Affiliation(s)
- Lian Zeng
- Department of Anesthesiology and Pain Medicine, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yanping Liu
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Qingsong Wang
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Hongmei Wan
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Xiran Meng
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Panwen Tu
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Huaxian Chen
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China
| | - Ailin Luo
- Department of Anesthesiology and Pain Medicine, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, Wuhan Clinical Research Center for Geriatric Anesthesia, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - PengChao Hu
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China.
| | - Xudong Ding
- Department of Rehabilitation Medicine, Clinical Medical Center for Rehabilitation Treatment of Dystonia Disease, Hubei Provincial Clinical Research Center for Parkinson's Disease, Central Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang 44100, China.
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3
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Lin Y, Jiang S, Su J, Xie W, Rahmati M, Wu Y, Yang S, Ru Q, Li Y, Deng Z. Novel insights into the role of ubiquitination in osteoarthritis. Int Immunopharmacol 2024; 132:112026. [PMID: 38583240 DOI: 10.1016/j.intimp.2024.112026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Ubiquitination (Ub) and deubiquitination are crucial post-translational modifications (PTMs) that precisely regulate protein degradation. Under the catalysis of a cascade of E1-E2-E3 ubiquitin enzymes, ubiquitination extensively regulates protein degradation exerting direct impact on various cellular processes, while deubiquitination opposes the effect of ubiquitination and prevents proteins from degradation. Notably, such dynamic modifications have been widely investigated to be implicated in cell cycle, transcriptional regulation, apoptosis and so on. Therefore, dysregulation of ubiquitination and deubiquitination could lead to certain diseases through abnormal protein accumulation and clearance. Increasing researches have revealed that the dysregulation of catalytic regulators of ubiquitination and deubiquitination triggers imbalance of cartilage homeostasis that promotes osteoarthritis (OA) progression. Hence, it is now believed that targeting on Ub enzymes and deubiquitinating enzymes (DUBs) would provide potential therapeutic pathways. In the following sections, we will summarize the biological role of Ub enzymes and DUBs in the development and progression of OA by focusing on the updating researches, with the aim of deepening our understanding of the underlying molecular mechanism of OA pathogenesis concerning ubiquitination and deubiquitination, so as to explore novel potential therapeutic targets of OA treatment.
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Affiliation(s)
- Yuzhe Lin
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China; Xiangya School of Medicine, Central South University, Changsha, China
| | - Shide Jiang
- Department of Orthopedics, The Central Hospital of Yongzhou, Yongzhou, 425000, China
| | - Jingyue Su
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wenqing Xie
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Masoud Rahmati
- Department of Physical Education and Sport Sciences, Faculty of Literature and Human Sciences, Lorestan University, Khoramabad, Iran; Department of Physical Education and Sport Sciences, Faculty of Literature and Humanities, Vali-E-Asr University of Rafsanjan, Rafsanjan, Iran
| | - Yuxiang Wu
- Department of Health and Physical Education, Jianghan University, Wuhan 430056, China
| | - Shengwu Yang
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qin Ru
- Xiangya School of Medicine, Central South University, Changsha, China; Department of Health and Physical Education, Jianghan University, Wuhan 430056, China.
| | - Yusheng Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
| | - Zhenhan Deng
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.
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4
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Kong P, Ahmad RE, Zulkifli A, Krishnan S, Nam HY, Kamarul T. The role of autophagy in mitigating osteoarthritis progression via regulation of chondrocyte apoptosis: A review. Joint Bone Spine 2024; 91:105642. [PMID: 37739213 DOI: 10.1016/j.jbspin.2023.105642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/22/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023]
Abstract
Osteoarthritis (OA) is the most prevalent chronic joint disease with an immense socioeconomic burden; however, no treatment has achieved complete success in effectively halting or reversing cartilage degradation, which is the central pathophysiological feature of OA. Chondrocytes loss or dysfunction is a significant contributing factor to the progressive cartilage deterioration as these sole resident cells have a crucial role to produce extracellular matrix proteins, thus maintaining cartilage structure and homeostasis. It has been previously suggested that death of chondrocytes occurring through apoptosis substantially contributes to cartilage degeneration. Although the occurrence of apoptosis in osteoarthritic cartilage and its correlation with cartilage degradation is evident, the causes of chondrocyte apoptosis leading to matrix loss are still not well-understood. Autophagy, an intracellular degradative mechanism that eliminates dysfunctional cytoplasmic components to aid cell survival in unfavourable conditions, is a potential therapeutic target to inhibit chondrocyte apoptosis and reduce OA severity. Despite accumulating evidence indicating significant cytoprotective effects of autophagy against chondrocyte apoptosis, the mechanistic link between autophagy and apoptosis in chondrocytes remains to be further explored. In this review, we summarize the relevant mechanistic events that perpetuate chondrocyte apoptosis and highlight the prominent role of autophagy in modulating these events to mitigate OA progression.
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Affiliation(s)
- Peggy Kong
- Department of Orthopaedic Surgery, Tissue Engineering Group, National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - Raja Elina Ahmad
- Department of Physiology, Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - Amirah Zulkifli
- Department of Orthopaedic Surgery, Tissue Engineering Group, National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - Shaliny Krishnan
- Department of Orthopaedic Surgery, Tissue Engineering Group, National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - Hui Yin Nam
- Department of Orthopaedic Surgery, Tissue Engineering Group, National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia; Nanotechnology and Catalysis Research Centre (NANOCAT), Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - Tunku Kamarul
- Department of Orthopaedic Surgery, Tissue Engineering Group, National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Faculty of Medicine, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia; Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam, 13200 Kepala Batas Pulau Pinang, Malaysia
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5
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Liu L, Wang J, Liu L, Shi W, Gao H, Liu L. The dysregulated autophagy in osteoarthritis: Revisiting molecular profile. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2024:S0079-6107(24)00034-8. [PMID: 38531488 DOI: 10.1016/j.pbiomolbio.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 01/21/2024] [Accepted: 03/22/2024] [Indexed: 03/28/2024]
Abstract
The risk factors of osteoarthritis (OA) are different and obesity, lifestyle, inflammation, cell death mechanisms and diabetes mellitus are among them. The changes in the biological mechanisms are considered as main regulators of OA pathogenesis. The dysregulation of autophagy is observed in different human diseases. During the pathogenesis of OA, the autophagy levels (induction or inhibition) change. The supportive and pro-survival function of autophagy can retard the progression of OA. The protective autophagy prevents the cartilage degeneration. Moreover, autophagy demonstrates interactions with cell death mechanisms and through inhibition of apoptosis and necroptosis, it improves OA. The non-coding RNA molecules can regulate autophagy and through direct and indirect control of autophagy, they dually delay/increase OA pathogenesis. The mitochondrial integrity can be regulated by autophagy to alleviate OA. Furthermore, therapeutic compounds, especially phytochemicals, stimulate protective autophagy in chondrocytes to prevent cell death. The protective autophagy has ability of reducing inflammation and oxidative damage, as two key players in the pathogenesis of OA.
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Affiliation(s)
- Liang Liu
- Department of Joint Surgery, Affiliated Hospital of Qingdao University, Qingdao, Pingdu, 266000, China
| | - Jie Wang
- Department of Joint Surgery, Affiliated Hospital of Qingdao University, Qingdao, Pingdu, 266000, China
| | - Lu Liu
- Department of Internal Medicine, Tianbao Central Health Hospital, Xintai City, Shandong Province, Shandong, Xintai, 271200, China
| | - Wenling Shi
- Department of Joint Surgery, Affiliated Hospital of Qingdao University, Qingdao, Pingdu, 266000, China
| | - Huajie Gao
- Operating Room of Qingdao University Affiliated Hospital, Qingdao, Pingdu, 266000, China
| | - Lun Liu
- Department of Joint Surgery, Affiliated Hospital of Qingdao University, Qingdao, Pingdu, 266000, China.
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6
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Sun G, Li X, Liu P, Wang Y, Yang C, Zhang S, Wang L, Wang X. PPARδ agonist protects against osteoarthritis by activating AKT/mTOR signaling pathway-mediated autophagy. Front Pharmacol 2024; 15:1336282. [PMID: 38576477 PMCID: PMC10991777 DOI: 10.3389/fphar.2024.1336282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 03/04/2024] [Indexed: 04/06/2024] Open
Abstract
Osteoarthritis (OA) is the most prevalent degenerative joint disease, and PPARs are involved in its pathogenesis; however, the specific mechanisms by which changes in PPARδ impact the OA pathogenesis yet to be discovered. The purpose of this study was to ascertain how PPARδ affects the onset and development of OA. In vitro, we found that PPARδ activation ameliorated apoptosis and extracellular matrix (ECM) degradation in OA chondrocytes stimulated by IL-1β. In addition, PPARδ activation may modulate AKT/mTOR signaling to partially regulate chondrocyte autophagy and apoptosis. In vivo, injection of PPARδ agonist into the articular cavity improved ECM degradation, apoptosis and autophagy in rats OA models generated by destabilization medial meniscus (DMM), eventually delayed degeneration of articular cartilage. Thus, targeting PPARδ for OA treatment may be a possibility.
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Affiliation(s)
- Guantong Sun
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaodong Li
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pengcheng Liu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yao Wang
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Cheng Yang
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuhong Zhang
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lei Wang
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoqing Wang
- Department of Orthopedics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Oxman E, Li H, Wang HY, Zohn IE. Identification and functional analysis of rare HECTD1 missense variants in human neural tube defects. Hum Genet 2024; 143:263-277. [PMID: 38451291 PMCID: PMC11043113 DOI: 10.1007/s00439-024-02647-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 01/20/2024] [Indexed: 03/08/2024]
Abstract
Neural tube defects (NTDs) are severe malformations of the central nervous system that arise from failure of neural tube closure. HECTD1 is an E3 ubiquitin ligase required for cranial neural tube closure in mouse models. NTDs in the Hectd1 mutant mouse model are due to the failure of cranial mesenchyme morphogenesis during neural fold elevation. Our earlier research has linked increased extracellular heat shock protein 90 (eHSP90) secretion to aberrant cranial mesenchyme morphogenesis in the Hectd1 model. Furthermore, overexpression of HECTD1 suppresses stress-induced eHSP90 secretion in cell lines. In this study, we report the identification of five rare HECTD1 missense sequence variants in NTD cases. The variants were found through targeted next-generation sequencing in a Chinese cohort of 352 NTD cases and 224 ethnically matched controls. We present data showing that HECTD1 is a highly conserved gene, extremely intolerant to loss-of-function mutations and missense changes. To evaluate the functional consequences of NTD-associated missense variants, functional assays in HEK293T cells were performed to examine protein expression and the ability of HECTD1 sequence variants to suppress eHSP90 secretion. One NTD-associated variant (A1084T) had significantly reduced expression in HEK293T cells. All five NTD-associated variants (p.M392V, p.T801I, p.I906V, p.A1084T, and p.P1835L) reduced regulation of eHSP90 secretion by HECTD1, while a putative benign variant (p.P2474L) did not. These findings are the first association of HECTD1 sequence variation with NTDs in humans.
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Affiliation(s)
- Elias Oxman
- Center for Genetic Medicine Research, Children's Research Institute, Children's National Research and Innovation Campus, Children's National Hospital, Washington, DC, 20012, USA
| | - Huili Li
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO, 80309, USA
| | - Hong-Yan Wang
- Obstetrics and Gynecology Hospital, Institute of Reproduction and Development, State Key Laboratory of Genetic, Engineering at School of Life Sciences, Fudan University, Shanghai, 200011, China
| | - Irene E Zohn
- Center for Genetic Medicine Research, Children's Research Institute, Children's National Research and Innovation Campus, Children's National Hospital, Washington, DC, 20012, USA.
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Roelofs AJ, De Bari C. Osteoarthritis year in review 2023: Biology. Osteoarthritis Cartilage 2024; 32:148-158. [PMID: 37944663 DOI: 10.1016/j.joca.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/25/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023]
Abstract
Great progress continues to be made in our understanding of the multiple facets of osteoarthritis (OA) biology. Here, we review the major advances in this field and progress towards therapy development over the past year, highlighting a selection of relevant published literature from a PubMed search covering the year from the end of April 2022 to the end of April 2023. The selected articles have been arranged in themes. These include 1) molecular regulation of articular cartilage and implications for OA, 2) mechanisms of subchondral bone remodelling, 3) role of synovium and inflammation, 4) role of age-related changes including cartilage matrix stiffening, cellular senescence, mitochondrial dysfunction, metabolic dysfunction, and impaired autophagy, and 5) peripheral mechanisms of OA pain. Progress in the understanding of the cellular and molecular mechanisms responsible for the multiple aspects of OA biology is unravelling novel therapeutic targets for disease modification.
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Affiliation(s)
- Anke J Roelofs
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK
| | - Cosimo De Bari
- Arthritis and Regenerative Medicine Laboratory, Centre for Arthritis and Musculoskeletal Health, University of Aberdeen, Aberdeen, UK.
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9
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Oxman E, Li H, Wang HY, Zohn I. Identification and Functional Analysis of Rare HECTD1 Missense Variants in Human Neural Tube Defects. RESEARCH SQUARE 2024:rs.3.rs-3794712. [PMID: 38260607 PMCID: PMC10802691 DOI: 10.21203/rs.3.rs-3794712/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Neural tube defects (NTDs) are severe malformations of the central nervous system that arise from failure of neural tube closure. HECTD1 is an E3 ubiquitin ligase required for cranial neural tube closure in mouse models. NTDs in the Hectd1 mutant mouse model are due to the failure of cranial mesenchyme morphogenesis during neural fold elevation. Our earlier research has linked increased secretion of extracellular heat shock protein 90 (eHSP90) to aberrant cranial mesenchyme morphogenesis in the Hectd1 model. Furthermore, overexpression of HECTD1 suppresses stress-induced eHSP90 secretion in cell lines. In this study, we report the identification of five rare HECTD1 missense sequence variants in NTD cases. The variants were found through targeted next-generation sequencing in a Chinese cohort of 352 NTD cases and 224 ethnically matched controls. We present data showing that HECTD1 is a highly conserved gene, extremely intolerant to loss-of-function mutations and missense changes. To evaluate the functional consequences of NTD-associated missense variants, functional assays in HEK293T cells were performed to examine protein expression and the ability of HECTD1 sequence variants to suppress eHSP90 secretion. One NTD-associated variant (A1084T) had significantly reduced expression in HEK293T cells. All five NTD-associated variants (p.M392V, p.T801I, p.I906V, p.A1084T, and p.P1835L) reduced regulation of eHSP90 secretion by HECTD1, while a putative benign variant (p.P2474L) did not. These findings are the first association of HECTD1 sequence variation with human disease and suggest that sequence variation in HECTD1 may play a role in the etiology of human NTDs.
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Affiliation(s)
| | - Huili Li
- University of Colorado at Boulder
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10
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Cao N, Wang D, Liu B, Wang Y, Han W, Tian J, Xiang L, Wang Z. Silencing of STUB1 relieves osteoarthritis via inducing NRF2-mediated M2 macrophage polarization. Mol Immunol 2023; 164:112-122. [PMID: 37992540 DOI: 10.1016/j.molimm.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/07/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
OBJECTIVES Shifting macrophages towards an anti-inflammatory state is key in treating osteoarthritis (OA) by reducing inflammation and tissue damage. However, the underlying mechanisms guiding this shift remain largely undefined. STUB1, an E3 ubiquitin ligase, known for its regulatory role in macrophage polarization. This study aims to explore the function and underlying action mechanisms of STUB1 in OA. METHODS An in vivo OA model was established in rats. Hematoxylin-Eosin and safranin O-fast green staining were performed to reveal the hispathological injuries in knee-joint tissues. Immunohistochemistry and flow cytometry were performed to detect the distribution of M1 and M2 macrophages. The inflammatory response (TNF-α and IL-6 levels) was evaluated by ELISA. In vitro, the interaction between STUB1 and NFR2 was determined by CO-IP and pull-down assays. After treated with LPS (an in vitro model of OA), the viability and apoptosis of chondrocytes were measured by CCK-8 and flow cytometry, respectively. RESULTS Silencing STUB1 alleviated OA in rats, as indicated by reduced subchondral bone thickness, knee synovitis score, histopathological damages, and inflammatory response. STUB1 silencing also decreased M1 macrophages and increased M2 macrophages in both in vivo and in vitro settings. NRF2 was identified as a target of STUB1, with STUB1 mediating its ubiquitination. Silencing NRF2 reversed the effects of STUB1 silencing on inducing M2 macrophage polarization. Furthermore, silencing STUB1 upregulated NRF2 expression in LPS-treated chondrocytes, promoting cell viability and inhibiting apoptosis. CONCLUSION Silencing STUB1 induces M2 macrophage polarization by inhibiting NRF2 ubiquitination, thereby contributing to the mitigation of OA.
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Affiliation(s)
- Nan Cao
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Danni Wang
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Bin Liu
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Yu Wang
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Wenfeng Han
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Jing Tian
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China
| | - Liangbi Xiang
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China.
| | - Zheng Wang
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang 110016, Liaoning Province, China.
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11
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Tang Z, Feng H, Chen X, Shao S, Li C. SNORC knockdown alleviates inflammation, autophagy defect and matrix degradation of chondrocytes in osteoarthritis development. Mol Cell Biochem 2023:10.1007/s11010-023-04842-9. [PMID: 37659033 DOI: 10.1007/s11010-023-04842-9] [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: 07/11/2023] [Accepted: 08/23/2023] [Indexed: 09/05/2023]
Abstract
Excessive inflammation and autophagy defect of chondrocytes play important roles in the pathological process of osteoarthritis (OA). The present study aimed to clarify the roles of small novel rich in cartilage (SNORC) in these pathological changes of chondrocytes in OA. Bioinformatics analysis of GEO dataset GSE207881 displayed that SNORC was a potential biomarker for OA. As confirmed by quantitative real-time PCR, immunohistochemical staining and western blotting, SNORC was significantly up-regulated in cartilage of OA rat model and interleukin (IL)-1β-stimulated primary rat articular chondrocytes in contrast to their corresponding normal control. Knocking down SNORC in IL-1β-induced chondrocytes obviously suppressed the production of nitric oxide (NO), IL-6, tumor necrosis factor (TNF)-α and prostaglandin E2 (PGE2) to alleviate inflammation, and reduced the protein levels of a disintegrin and metalloproteinase with thrombospondin 5 (ADAMTS5) and matrix metallopeptidase (MMP)13 and elevated collagen type 2 alpha 1 (COL2A1) level to improve matrix degradation. Down-regulation of SNORC increased Beclin1 expression and LC3II/LC3I ratio, but suppressed p62 expression to restore impaired autophagy in IL-1β-induced chondrocytes. Moreover, down-regulating SNORC mitigated mitochondrial dysfunction and apoptosis in IL-1β-stimulated chondrocytes. Mechanically, SNORC simultaneously activated the phosphatidylinositol-3-kinase/serine threonine kinase (PI3K/AKT) and c-Jun N-terminal kinase (JNK)/c-Jun signaling pathway in the IL-1β-induced chondrocyte, while re-activating the PI3K and JNK signals abolished the suppressive effect of down-regulating SNORC on IL-1β-induced chondrocyte damage. In a word, SNORC knockdown alleviates inflammation, matrix degradation, autophagy defect and excessive apoptosis of chondrocytes during OA development via suppressing the PI3K and JNK signaling pathway.
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Affiliation(s)
- Zhifang Tang
- Clinical Medical College of Dali University, Dali, 671000, China
| | - Hanzhen Feng
- Clinical Medical College of Dali University, Dali, 671000, China
| | - Xusheng Chen
- Kunming Medical University, Kunming, 650500, China
| | - Shuiyan Shao
- Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Chuan Li
- Institute of Traumatology and Orthopedics, 920th Hospital of Joint Logistics Support Force, PLA, No.212 Daguan Road, Xishan District, Kunming, Yunnan, 650000, China.
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Wang H, Wang W, Wang J, Zhang L, Luo Y, Tang X. MicroRNA-15a/β1,4-GalT-I axis contributes to cartilage degeneration via NF-κB signaling in osteoarthritis. Clinics (Sao Paulo) 2023; 78:100254. [PMID: 37478628 PMCID: PMC10387577 DOI: 10.1016/j.clinsp.2023.100254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 06/05/2023] [Accepted: 07/03/2023] [Indexed: 07/23/2023] Open
Abstract
OBJECTIVE Osteoarthritis is a condition characterized by articular cartilage degradation. The increased expression of β1,4-Galactosyltransferase-I (β1,4-GalT-I) in the articular cartilage of osteoarthritis patients was related to an inflammatory response. The aim of this study was to elucidate the role of β1,4-GalT-I in osteoarthritis. This study aimed to determine the function of 1,4-GalT-I in osteoarthritis. METHODS The osteoarthritis mouse model with the destabilization of the medial meniscus was established by microsurgical technique. Pathological changes in articular cartilage were observed by hematoxylin and eosin staining and safranin O-fast green staining. Quantitative real-time polymerase chain reaction, western blot, and enzyme-linked immunosorbent assays were used to observe mRNA and protein expression, respectively. RNA interactions were verified by a luciferase reporter assay. SA-β-Gal staining was used to assess chondrocyte senescence. Immunofluorescence staining was conducted to observe the localization of Nuclear Factor-kappaB (NF-κB). RESULTS β1,4-GalT-I and microRNA-15a (miR-15a) show high and low expression in the articular cartilage of osteoarthritis, respectively. MiR-15a inhibits the mRNA translation of β1,4-GalT-I. β1,4-GalT-I promotes extracellular matrix degradation, senescence, and NF-κB activation in IL-1β-stimulated chondrocytes, which can be reversed by overexpression of miR-15a. Intra-articular injection of microRNA-15a ameliorates cartilage degeneration by inhibiting β1,4-GalT-I and phosphorylation of NF-κB in vivo. CONCLUSION The authors clarified that the miR-15a/β1,4-GalT-I axis inhibits the phosphorylation of NF-κB thereby inhibiting extracellular matrix degradation and senescence in chondrocytes to alleviate cartilage degeneration in osteoarthritis. MiR-15a and β1,4-GalT-I may serve as potentially effective targets for the future treatment of osteoarthritis.
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Affiliation(s)
- Hairong Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Weilin Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Jian Wang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Linsheng Zhang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Yujie Luo
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China
| | - Xiaobo Tang
- Department of Orthopedics, Jianhu People's Hospital, Yancheng, Jiangsu, China.
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Zheng C, Chen J, Wu Y, Wang X, Lin Y, Shu L, Liu W, Wang P. Elucidating the role of ubiquitination and deubiquitination in osteoarthritis progression. Front Immunol 2023; 14:1217466. [PMID: 37359559 PMCID: PMC10288844 DOI: 10.3389/fimmu.2023.1217466] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/01/2023] [Indexed: 06/28/2023] Open
Abstract
Osteoarthritis is non-inflammatory degenerative joint arthritis, which exacerbates disability in elder persons. The molecular mechanisms of osteoarthritis are elusive. Ubiquitination, one type of post-translational modifications, has been demonstrated to accelerate or ameliorate the development and progression of osteoarthritis via targeting specific proteins for ubiquitination and determining protein stability and localization. Ubiquitination process can be reversed by a class of deubiquitinases via deubiquitination. In this review, we summarize the current knowledge regarding the multifaceted role of E3 ubiquitin ligases in the pathogenesis of osteoarthritis. We also describe the molecular insight of deubiquitinases into osteoarthritis processes. Moreover, we highlight the multiple compounds that target E3 ubiquitin ligases or deubiquitinases to influence osteoarthritis progression. We discuss the challenge and future perspectives via modulation of E3 ubiquitin ligases and deubiquitinases expression for enhancement of the therapeutic efficacy in osteoarthritis patients. We conclude that modulating ubiquitination and deubiquitination could alleviate the osteoarthritis pathogenesis to achieve the better treatment outcomes in osteoarthritis patients.
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Affiliation(s)
- Chenxiao Zheng
- Department of Orthopaedics and Traumatology, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Jiayi Chen
- Department of Orthopaedics and Traumatology, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Yurui Wu
- Department of Orthopaedics and Traumatology, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Xiaochao Wang
- Department of Orthopaedics, The Second Clinical Medical College of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Yongan Lin
- South China University of Technology, Guangzhou, Guangdong, China
| | - Lilu Shu
- Department of Medicine, Zhejiang Zhongwei Medical Research Center, Hangzhou, Zhejiang, China
| | - Wenjun Liu
- Department of Medicine, Zhejiang Zhongwei Medical Research Center, Hangzhou, Zhejiang, China
| | - Peter Wang
- Department of Medicine, Zhejiang Zhongwei Medical Research Center, Hangzhou, Zhejiang, China
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Aberrant regulation of autophagy linked to OA. Nat Rev Rheumatol 2022; 18:672. [PMID: 36333453 DOI: 10.1038/s41584-022-00872-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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