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Zhang SP, Tong M, Li SD, Zhang B, Zhang W, Wang R, Dong ZY, Huang YF. The Role of Microvascular Variations in the Process of Intervertebral Disk Degeneration and Its Regulatory Mechanisms: A Literature Review. Orthop Surg 2024. [PMID: 39205477 DOI: 10.1111/os.14209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 08/01/2024] [Accepted: 08/06/2024] [Indexed: 09/04/2024] Open
Abstract
Microvascular changes are considered key factors in the process of intervertebral disk degeneration (IDD). Microvascular invasion and growth into the nucleus pulposus (NP) and cartilaginous endplates are unfavorable factors that trigger IDD. In contrast, the rich distribution of microvessels in the bony endplates and outer layers of the annulus fibrosus is an important safeguard for the nutrient supply and metabolism of the intervertebral disk (IVD). In particular, the adequate supply of microvessels in the bony endplates is the main source of the nutritional supply for the entire IVD. Microvessels can affect the progression of IDD through a variety of pathways. Many studies have explored the effects of microvessel alterations in the NP, annulus fibrosus, cartilaginous endplates, and bony endplates on the local microenvironment through inflammation, apoptosis, and senescence. Studies also elucidated the important roles of microvessel alterations in the process of IDD, as well as conducted in-depth explorations of cytokines and biologics that can inhibit or promote the ingrowth of microvessels. Therefore, the present manuscript reviews the published literature on the effects of microvascular changes on IVD to summarize the roles of microvessels in IVD and elaborate on the mechanisms of action that promote or inhibit de novo microvessel formation in IVD.
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Affiliation(s)
- Si-Ping Zhang
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Min Tong
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Shi-Da Li
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Bin Zhang
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Wenhao Zhang
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Rong Wang
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Zhen-Yu Dong
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
| | - Yi-Fei Huang
- Department of Spinal Surgery, Traditional Chinese Medicine Hospital affiliated to Xinjiang Medical University, Urumqi, China
- Xinjiang Uygur Autonomous Region Academy of Traditional Chinese Medicine, Urumqi, China
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Reyes Alcaraz V, Pattappa G, Miura S, Angele P, Blunk T, Rudert M, Hiraki Y, Shukunami C, Docheva D. A Narrative Review of the Roles of Chondromodulin-I (Cnmd) in Adult Cartilage Tissue. Int J Mol Sci 2024; 25:5839. [PMID: 38892027 PMCID: PMC11173128 DOI: 10.3390/ijms25115839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/13/2024] [Accepted: 05/16/2024] [Indexed: 06/21/2024] Open
Abstract
Articular cartilage is crucial for joint function but its avascularity limits intrinsic repair, leading to conditions like osteoarthritis (OA). Chondromodulin-I (Cnmd) has emerged as a key molecule in cartilage biology, with potential implications for OA therapy. Cnmd is primarily expressed in cartilage and plays an important role in chondrocyte proliferation, cartilage homeostasis, and the blocking of angiogenesis. In vivo and in vitro studies on Cnmd, also suggest an involvement in bone repair and in delaying OA progression. Its downregulation correlates with OA severity, indicating its potential as a therapeutic target. Further research is needed to fully understand the mode of action of Cnmd and its beneficial implications for managing OA. This comprehensive review aims to elucidate the molecular characteristics of Cnmd, from its expression pattern, role in cartilage maintenance, callus formation during bone repair and association with OA.
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Affiliation(s)
- Viviana Reyes Alcaraz
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, University of Würzburg, 97070 Würzburg, Germany; (V.R.A.); (G.P.)
| | - Girish Pattappa
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, University of Würzburg, 97070 Würzburg, Germany; (V.R.A.); (G.P.)
| | - Shigenori Miura
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan; (S.M.); (C.S.)
| | - Peter Angele
- Laboratory of Experimental Trauma Surgery, Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany;
| | - Torsten Blunk
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital Würzburg, 97080 Würzburg, Germany;
| | - Maximilian Rudert
- Department of Orthopaedics, Orthopaedic Hospital König-Ludwig-Haus, University of Würzburg, 97070 Würzburg, Germany;
| | - Yuji Hiraki
- Department of Cellular Differentiation, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8501, Japan;
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan; (S.M.); (C.S.)
| | - Denitsa Docheva
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, University of Würzburg, 97070 Würzburg, Germany; (V.R.A.); (G.P.)
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Zhong H, Li M, Wu H, Ying H, Zhong M, Huang M. Silencing DDX3 Attenuates Interleukin-1β-Induced Intervertebral Disc Degeneration Through Inhibiting Pyroptosis. Inflammation 2024:10.1007/s10753-024-02042-1. [PMID: 38735906 DOI: 10.1007/s10753-024-02042-1] [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: 02/26/2024] [Revised: 04/08/2024] [Accepted: 04/30/2024] [Indexed: 05/14/2024]
Abstract
Intervertebral disc degeneration (IVDD) is a common disorder associated with chronic inflammation and cell death. In this study, an IVDD rat model was created through Interleukin-1β (IL-1β) injection. The degeneration of intervertebral disc tissues was assessed using magnetic resonance imaging (MRI), followed by hematoxylin and eosin (H&E) and terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling (TUNEL) staining. RNA sequencing was performed to identify differentially expressed genes (DEGs) between the IVDD model and control rats. The expression levels of DEGs (DEAD-box polypeptide 3 (DDX3), lysine-specific demethylase 5D (KDM5D), interferon-induced gene-1 (IFIT1), ribosomal protein S10 (RPS10), tenomodulin (TNMD), and pentraxin 3 (PTX3)) were measured by real-time quantitative polymerase chain reaction (RT-qPCR). The regulatory effect of DDX3 on pyroptosis in IL-1β-treated nucleus pulpous (NP) cells was assessed after transfection with siRNA of DDX3. A total of 601 DEGs were identified from the IVDD model rat, and were abundant in extracellular matrix (ECM) organization, ECM-receptor interaction, and inflammatory pathways, including the PI3K-Akt, TNF, and AMPK signaling pathways. DDX3, KDM5D, and IFIT1 levels were notably elevated, whereas RPS10, TNMD, and PTX3 levels were decreased in the IL-1β-induced IVDD rat model. Moreover, silencing DDX3 promoted cell proliferation and abolished IL-1β-induced cell apoptosis and pyroptosis. This study revealed the role of DDX3 in IVDD pyroptosis, providing potential target for IVDD management.
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Affiliation(s)
- Hongfa Zhong
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China.
| | - Mingheng Li
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China
| | - Haijian Wu
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China
| | - Hui Ying
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China
| | - Mingliang Zhong
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China
| | - Mouzhang Huang
- Department of Orthopaedics, Ganzhou People's Hospital, No.16 Meiguang Avenue, Ganzhou City, Jiangxi Province, 341000, China
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Liu X, He L, Wang N, Xie L, Wu B. Bioinformatics analysis and experimental validation of key genes associated with lumbar disc degeneration and biomechanics. Heliyon 2024; 10:e27016. [PMID: 38463775 PMCID: PMC10920361 DOI: 10.1016/j.heliyon.2024.e27016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 02/01/2024] [Accepted: 02/22/2024] [Indexed: 03/12/2024] Open
Abstract
Background Lumbar disc degeneration (LDD) is an important pathological basis for the development of degenerative diseases of the lumbar spine. Most clinical patients have low back pain as their main symptom. The deterioration of the biomechanical environment is an important cause of LDD. Although there is a large amount of basic research on LDD, there are fewer reports that correlate biomechanical mechanisms with basic research. Our research aims to identify 304 key genes involved in LDD due to biomechanical deterioration, using a bioinformatics approach. We focus on SMAD3, CAV1, SMAD7, TGFB1 as hub genes, and screen for 30 potential target drugs, offering novel insights into LDD pathology and treatment options. Methods The Gene Cards, GenCLip3, OMIM and Drugbank databases were explored to obtain genes associated with biomechanics and LDD, followed by making veen plots to obtain both co-expressed genes. GO enrichment analysis and KEGG pathway analysis of the co-expressed genes were obtained using the DAVID online platform and visualised via a free online website. Protein interaction networks (PPI) were obtained through the STRING platform and visualised through Cytoscape 3.9.0. These genes were predicted for downstream interaction networks using the STITCH platform. Then, the GSE56081 dataset was used to validate the key genes. RT-PCR was used to detect mRNA expression of core genes in the degenerated nucleus pulposus (NP) samples and western bolt was used for protein expression. Lastly, the obtained hub genes were searched in the drug database (DGIdb) to find relevant drug candidates. Results From the perspective of biomechanics-induced LDD, we obtained a total of 304 genes, the GO functional enrichment and KEGG pathway enrichment analysis showed that the functions of these genes are mostly related to inflammation and apoptosis. The PPI network was constructed and four Hub genes were obtained through the plug-in of Cytoscape software, namely SMAD3, CAV1, SMAD7 and TGFB1. The analysis of key genes revealed that biomechanical involvement in LDD may be related to the TGF-β signaling pathway. Validation of the GSE56081 dataset revealed that SMAD3 and TGFB1 were highly expressed in degenerating NP samples. RT-PCR results showed that the mRNA expression of SMAD3 and TGFB1 was significantly increased in the severe degeneration group; Western blot results also showed that the protein expression of TGFB1 and P-SMAD3 was significantly increased. In addition, we identified 30 potential drugs. Conclusion This study presented a new approach to investigate the correlation between biomechanical mechanisms and LDD. The deterioration of the biomechanical environment may cause LDD through the TGF-β signaling pathway. TGFB1 and SMAD3 are important core targets. The important genes, pathways and drugs obtained in this study provided a new basis and direction for the study, diagnosis and treatment of LDD.
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Affiliation(s)
- Xiyu Liu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Lipeng He
- Department of Spine Surgery, Wuxi Traditional Chinese Medicine Hospital, Nanjing University of Chinese Medicine, Wuxi, 214100 China
| | - Nan Wang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Lin Xie
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
| | - Bin Wu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210028, China
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Lu Z, Chen P, Xu Q, Li B, Jiang S, Jiang L, Zheng X. Constitutive and conditional gene knockout mice for the study of intervertebral disc degeneration: Current status, decision considerations, and future possibilities. JOR Spine 2023; 6:e1242. [PMID: 36994464 PMCID: PMC10041386 DOI: 10.1002/jsp2.1242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 12/13/2022] [Accepted: 12/22/2022] [Indexed: 01/09/2023] Open
Abstract
There have been an increasing number of patients with degenerative disc diseases due to the aging population. In light of this, studies on the pathogenesis of intervertebral disc degeneration have become a hot topic, and gene knockout mice have become a valuable tool in this field of research. With the development of science and technology, constitutive gene knockout mice can be constructed using homologous recombination, zinc finger nuclease, transcription activator-like effector nuclease technology and clustered regularly interspaced short palindromic repeats/Cas9 (CRISPR/Cas9) system, and conditional gene knockout mice can be constructed using the Cre/LoxP system. The gene-edited mice using these techniques have been widely used in the studies on disc degeneration. This paper reviews the development process and principles of these technologies, functions of the edited genes in disc degeneration, advantages, and disadvantages of different methods and possible targets of the specific Cre recombinase in intervertebral discs. Recommendations for the choice of suitable gene-edited model mice are presented. At the same time, possible technological improvements in the future are also discussed.
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Affiliation(s)
- Ze‐Yu Lu
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Peng‐Bo Chen
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Qing‐Yin Xu
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Bo Li
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Sheng‐Dan Jiang
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Lei‐Sheng Jiang
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Xin‐Feng Zheng
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
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Yang M, Xiang D, Wang S, Liu W. In Vitro Studies for Investigating Creep of Intervertebral Discs under Axial Compression: A Review of Testing Environment and Results. MATERIALS 2022; 15:ma15072500. [PMID: 35407833 PMCID: PMC9000064 DOI: 10.3390/ma15072500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/14/2022] [Accepted: 03/22/2022] [Indexed: 01/06/2023]
Abstract
Creep responses of intervertebral discs (IVDs) are essential for spinal biomechanics clarification. Yet, there still lacks a well-recognized investigation protocol for this phenomenon. Current work aims at providing researchers with an overview of the in vitro creep tests reported by previous studies, specifically specimen species, testing environment, loading regimes and major results, based on which a preliminary consensus that may guide future creep studies is proposed. Specimens used in creep studies can be simplified as a “bone–disc–bone” structure where three mathematical models can be adopted for describing IVDs’ responses. The preload of 10–50 N for 30 min or three cycles followed by 4 h-creep under constant compression is recommended for ex vivo simulation of physiological condition of long-time sitting or lying. It is worth noticing that species of specimens, environment temperature and humidity all have influences on biomechanical behaviors, and thus are summarized and compared through the literature review. All factors should be carefully set according to a guideline before tests are conducted to urge comparable results across studies. To this end, this review also provides a guideline, as mentioned before, and specific steps that might facilitate the community of biomechanics to obtain more repeatable and comparable results from both natural specimens and novel biomaterials.
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Affiliation(s)
- Mengying Yang
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Biomechanics and Biotechnology Lab, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
| | - Dingding Xiang
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
| | - Song Wang
- Biomechanics and Biotechnology Lab, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
- Correspondence: (S.W.); (W.L.)
| | - Weiqiang Liu
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Biomechanics and Biotechnology Lab, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
- Correspondence: (S.W.); (W.L.)
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