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Wakimoto Y, Miura Y, Inoue S, Nomura M, Moriyama H. Effects of different combinations of mechanical loading intensity, duration, and frequency on the articular cartilage in mice. Mol Biol Rep 2024; 51:862. [PMID: 39073659 PMCID: PMC11286701 DOI: 10.1007/s11033-024-09762-5] [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: 01/29/2024] [Accepted: 06/26/2024] [Indexed: 07/30/2024]
Abstract
BACKGROUND Understanding how healthy articular cartilage responds to mechanical loading is critical. Moderate mechanical loading has positive effects on the cartilage, such as maintaining cartilage homeostasis. The degree of mechanical loading is determined by a combination of intensity, frequency, and duration; however, the best combination of these parameters for knee cartilage remains unclear. This study aimed to determine which combination of intensity, frequency, and duration provides the best mechanical loading on healthy knee articular cartilage in vitro and in vivo. METHODS AND RESULTS In this study, 33 male mice were used. Chondrocytes isolated from mouse knee joints were subjected to different cyclic tensile strains (CTSs) and assessed by measuring the expression of cartilage matrix-related genes. Furthermore, the histological characteristics of mouse tibial cartilages were quantified using different treadmill exercises. Chondrocytes and mice were divided into the control group and eight intervention groups: high-intensity, high-frequency, and long-duration; high-intensity, high-frequency, and short-duration; high-intensity, low-frequency, and long-duration; high-intensity, low-frequency, and short-duration; low-intensity, high-frequency, and long-duration; low-intensity, high-frequency, and short-duration; low-intensity, low-frequency, and long-duration; low-intensity, low-frequency, and short-duration. In low-intensity CTSs, chondrocytes showed anabolic responses by altering the mRNA expression of COL2A1 in short durations and SOX9 in long durations. Furthermore, low-intensity, low-frequency, and long-duration treadmill exercises minimized chondrocyte hypertrophy and enhanced aggrecan synthesis in tibial cartilages. CONCLUSION Low-intensity, low-frequency, and long-duration mechanical loading is the best combination for healthy knee cartilage to maintain homeostasis and activate anabolic responses. Our findings provide a significant scientific basis for exercise and lifestyle instructions.
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Affiliation(s)
- Yoshio Wakimoto
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Tomogaoka 7-10-2, Suma-ku, 654-0142, Kobe, Hyogo, Japan.
| | - Yasushi Miura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Tomogaoka 7-10-2, Suma-ku, 654-0142, Kobe, Hyogo, Japan
| | - Shota Inoue
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Tomogaoka 7-10-2, Suma-ku, 654-0142, Kobe, Hyogo, Japan
| | - Masato Nomura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Tomogaoka 7-10-2, Suma-ku, 654-0142, Kobe, Hyogo, Japan
| | - Hideki Moriyama
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Tomogaoka 7-10-2, Suma-ku, 654-0142, Kobe, Hyogo, Japan
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Miyauchi A, Noguchi M, Lei XF, Sakaki M, Kobayashi-Tanabe M, Haraguchi S, Miyazaki A, Kim-Kaneyama JR. Knockdown of mechanosensitive adaptor Hic-5 ameliorates post-traumatic osteoarthritis in rats through repression of MMP-13. Sci Rep 2023; 13:7446. [PMID: 37156857 PMCID: PMC10167244 DOI: 10.1038/s41598-023-34659-x] [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: 02/18/2023] [Accepted: 05/04/2023] [Indexed: 05/10/2023] Open
Abstract
Osteoarthritis (OA) is the most common joint disease associated with articular cartilage destruction. Matrix metalloproteinase-13 (MMP-13) has an essential role in OA pathogenesis by degradation of collagen II, a major component of articular cartilage. Hydrogen peroxide-inducible clone-5 (Hic-5; TGFB1I1), a transforming growth factor-β-inducible mechanosensor, has previously been reported to promote OA pathogenesis by upregulating MMP-13 expression in mouse osteoarthritic lesions. In our current study, immunohistochemical analysis showed that Hic-5 protein expression was increased in human OA cartilage compared with normal cartilage. Functional experiments demonstrated that Hic-5 and MMP-13 expression was increased by mechanical stress, and mechanical stress-induced MMP-13 expression was suppressed by Hic-5 siRNA in human chondrocytes. Moreover, intracellular localization of Hic-5 shifted to the nucleus from focal adhesions in human chondrocytes subjected to mechanical stress, and nuclear Hic-5 increased MMP-13 gene expression. In vivo, intra-articular injection of Hic-5 siRNA decreased the Osteoarthritis Research Society International score and MMP-13 protein expression in articular cartilage of OA rats. Our findings suggest that Hic-5 regulates transcription of MMP-13 in human chondrocytes, and Hic-5 may be a novel therapeutic target for OA because OA progression was suppressed by intra-articular injection of Hic-5 siRNA in rats.
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Affiliation(s)
- Aya Miyauchi
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Masahito Noguchi
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Xiao-Feng Lei
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Masashi Sakaki
- Department of Medicine, Division of Gastroenterology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8666, Japan
| | - Momoko Kobayashi-Tanabe
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Shogo Haraguchi
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Akira Miyazaki
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Joo-Ri Kim-Kaneyama
- Department of Biochemistry, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan.
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Wang Y, Jin Z, Jia S, Shen P, Yang Y, Huang Y. Mechanical stress protects against chondrocyte pyroptosis through TGF-β1-mediated activation of Smad2/3 and inhibition of the NF-κB signaling pathway in an osteoarthritis model. Biomed Pharmacother 2023; 159:114216. [PMID: 36634591 DOI: 10.1016/j.biopha.2023.114216] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/20/2022] [Accepted: 01/04/2023] [Indexed: 01/12/2023] Open
Abstract
Osteoarthritis (OA) is a degenerative disease that is difficult to cure owing to its complicated pathogenesis. Exercise therapy has been endorsed as a primary treatment option. However, it remains controversial how exercise intensity regulates OA progression. Here, a declining propensity for TGF-β1 was predicted via bioinformatics analysis of microarray GSE57218 and validated in cartilage samples obtained from arthroplasty. Based on this, cyclic tensile strain or TGF-β1 intervention was performed on human OA chondrocytes, and we found that moderate-intensity mechanical loads protected chondrocytes against pyroptosis. During this process, the elevation of TGF-β1 is mechanically stimuli-dependent and exerts an inhibitory effect on chondrocyte pyroptosis. Moreover, we elucidated that TGF-β1 activated Smad2/3 and inhibited the NF-κB signaling pathway to suppress chondrocyte pyroptosis. Furthermore, we established a rat knee OA model by intra-articular injection of monosodium iodoacetate and performed treadmill exercises of different intensities. Similar to the in vitro results, we demonstrated that moderate-intensity treadmill exercise had an outstanding chondroprotective effect. An inappropriate intensity of mechanical stimulation may aggravate OA both in vivo and in vitro. Overall, our findings demonstrated that activation of the TGF-β1/Smad2/Smad3 axis and inhibition of NF-κB coordinately inhibit chondrocyte pyroptosis under mechanical loads. This study sheds light on the future development of safe and effective exercise therapies for OA.
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Affiliation(s)
- Yang Wang
- Department of Ultrasound, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
| | - Zhuangzhuang Jin
- Department of Emergency Medicine, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
| | - Shuangshuo Jia
- Department of Orthopedic Surgery, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
| | - Peng Shen
- Department of Orthopedic Surgery, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China
| | - Yue Yang
- Department of Orthopedic Surgery, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China.
| | - Ying Huang
- Department of Ultrasound, Shengjing Hospital, China Medical University, Shenyang, Liaoning, China.
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Hu B, Xiao L, Wang C, Liu C, Zhang Y, Ding B, Gao D, Lu Y, Xu H. Circ_0022382 ameliorated intervertebral disc degeneration by regulating TGF-β3 expression through sponge adsorption of miR-4726-5p. Bone 2022; 154:116185. [PMID: 34537436 DOI: 10.1016/j.bone.2021.116185] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/04/2021] [Accepted: 09/07/2021] [Indexed: 12/19/2022]
Abstract
Circular RNAs (circRNAs) participate in the progression of many diseases, but knowledge on the role of circRNAs in intervertebral disc degeneration (IDD) is limited. In this study, we discovered the characteristics of a new circRNA (circ_0022382) in human endplate chondrocytes. Currently, real-time quantitative polymerase chain reaction (RT-qPCR) showed that the relative expression level of circ_0022382 was significantly lower under intermittent cyclic tension stimulation than in the control group. circ_0022382, miR-4726-5p and Transforming growth factor 3 (TGF-β3) were evaluated by RT-qPCR, Western Blot and immunofluorescence assay. Additionally, the role and mechanism of circ_0022382 in vivo were also consistent in the rat model. Furthermore, Intermittent cyclic mechanical tension can cause degeneration of endplate chondrocytes. The tension-sensitive circRNA_0022382 was decreased, and we found that circRNA_0022382 promoted morphology of endplate chondrocytes by sponge-binding miR-4726-5p down-regulation of target gene the TGF-β3 expression, thereby alleviating IDD. In a rat model of acupuncture, intervertebral disc injection of circ_0022382 relieved the progression of IDD in vivo. In conclusion, the circ_0022382/miR-4726-5p/TGF-β3 axis plays a key role in the anabolism and catabolism of the endplate chondrocyte extracellular matrix (ECM). It is suggested that circ_0022382 may provide a new approach for the prevention and treatment of IDD.
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Affiliation(s)
- Bo Hu
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China; Department of Orthopedic Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Liang Xiao
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher education Institution, Wannan Medical College, Wuhu 241001, China
| | - Chong Wang
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China
| | - Chen Liu
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China; Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher education Institution, Wannan Medical College, Wuhu 241001, China
| | - Yu Zhang
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China
| | - Baiyang Ding
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China
| | - Daokuan Gao
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China
| | - Yanqing Lu
- Guangxi Medical University Nanning, Guangxi, China
| | - Hongguang Xu
- Yijishan Hospital of Wannan Medical College Wuhu, Anhui, China.
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Yue D, Du L, Zhang B, Wu H, Yang Q, Wang M, Pan J. Time-dependently Appeared Microenvironmental Changes and Mechanism after Cartilage or Joint Damage and the Influences on Cartilage Regeneration. Organogenesis 2021; 17:85-99. [PMID: 34806543 DOI: 10.1080/15476278.2021.1991199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Cartilage and joint damage easily degenerates cartilage and turns into osteoarthritis (OA), which seriously affects human life and work, and has no cure currently. The temporal and spatial changes of multiple microenvironments upon the damage of cartilage and joint are noticed, including the emergences of inflammation, bone remodeling, blood vessels, and nerves, as well as alterations of extracellular and pericellular matrix, oxygen tension, biomechanics, underneath articular cartilage tissues, and pH value. This review summarizes the existing literatures on microenvironmental changes, mechanisms, and their negative effects on cartilage regeneration following cartilage and joint damage. We conclude that time-dependently rebuilding the multiple normal microenvironments of damaged cartilage is the key for cartilage regeneration after systematic studies for the timing and correlations of various microenvironment changes.
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Affiliation(s)
- Danyang Yue
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Lin Du
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Bingbing Zhang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Huan Wu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Qiong Yang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
| | - Min Wang
- Orthopedic Department, Xinqiao Hospital, Army Medical University, Chongqing, PR China
| | - Jun Pan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, Bioengineering College, Chongqing University, Chongqing, PR China
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6
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Wang X, Wang D, Xia P, Cheng K, Wang Q, Wang X, Lin Q, Song J, Chen A, Li X. Ultrasound-targeted simvastatin-loaded microbubble destruction promotes OA cartilage repair by modulating the cholesterol efflux pathway mediated by PPARγ in rabbits. Bone Joint Res 2021; 10:693-703. [PMID: 34666502 PMCID: PMC8559971 DOI: 10.1302/2046-3758.1010.bjr-2021-0162.r3] [Citation(s) in RCA: 3] [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] [Indexed: 11/26/2022] Open
Abstract
Aims To evaluate the effect of ultrasound-targeted simvastatin-loaded microbubble destruction (UTMDSV) for alleviation of the progression of osteoarthritis (OA) in rabbits through modulation of the peroxisome proliferator-activated receptor (PPARγ). Methods In vitro, OA chondrocytes were treated with ultrasound (US), US-targeted microbubble destruction (UTMD), simvastatin (SV), and UTMDSV on alternate days for four weeks. Chondrocytes were also treated with PPARγ inhibitor, PPARγ inhibitor+ UTMDSV, and UTMDSV. The cholesterol efflux rate and triglyceride levels were measured using an assay kit and oil red O staining, respectively. In vivo, the OA rabbits were treated with a single intra-articular injection of UTMD, SV, and UTMDSV every seven days for four weeks. Cartilage histopathology was assessed by safranin-O staining and the Mankin score. Total cholesterol (TC) and high-density lipoprotein-cholesterol (HDL-C) in rabbit knee synovial fluid were detected by enzyme-marker assay. Aggrecan, collagen II, and PPARγ expression levels were analyzed by Western blotting (WB). Results In vitro, UTMDSV significantly increased the cholesterol efflux rate and aggrecan, collagen II, and PPARγ levels in OA chondrocytes; these effects were blocked by the PPARγ inhibitor. In vivo, UTMDSV significantly increased aggrecan, collagen II, PPARγ, and HDL-C levels, while TC levels and Mankin scores were decreased compared with the UTMD, SV, OA, and control groups. Conclusion UTMDSV promotes cartilage extracellular matrix synthesis by modulating the PPARγ-mediated cholesterol efflux pathway in OA rabbits. Cite this article: Bone Joint Res 2021;10(10):693–703.
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Affiliation(s)
- Xinwei Wang
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Danbi Wang
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Peng Xia
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Kai Cheng
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Qi Wang
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Xiaoju Wang
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Qiang Lin
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Jiulong Song
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Anliang Chen
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Xueping Li
- Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
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7
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Qiu Y, Zhu G, Zeng C, Yuan S, Qian Y, Ye Z, Zhao S, Li R. Next‑generation sequencing of miRNAs and lncRNAs from rat femur and tibia under mechanical stress. Mol Med Rep 2021; 24:561. [PMID: 34109424 PMCID: PMC8201655 DOI: 10.3892/mmr.2021.12200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 05/13/2021] [Indexed: 02/06/2023] Open
Abstract
Exercise intervention has become one of the most effective methods to prevent and treat osteoporosis, which is a common age‑related disease and seriously affects the health and quality of life of the elderly. However, the molecular mechanism remains to be elucidated. The present study demonstrated the exercise‑induced promotion of osteogenic differentiation and inhibition of adipogenic differentiation in femur and tibia by establishing an animal exercise model using a treadmill exercise system. MicroRNA (miRNA/miR) and long non‑coding (lnc)RNA sequencing analyses identified 16 upregulated and two downregulated miRNAs in the exercise group, as well as 44 upregulated lncRNAs and 39 downregulated lncRNAs in the exercise group. There was increased expression of miR‑9942 and miR‑7704 in both the femur and tibia and an upregulation of miR‑30d, miR‑5100 and miR‑1260 in the femur of animals from the exercise group. In addition, four of the five most downregulated lncRNAs, including lncRNA MSTRG.2625, lncRNA MSTRG.1557, lncRNA MSTRG.691 and lncRNA MSTRG.7497, were demonstrated to be suppressed in both the femur and tibia after treadmill exercise. The results of the present study provided a valuable resource for further exploring the molecular mechanisms underlying the regulation of osteoporosis by exercise.
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Affiliation(s)
- Yiyan Qiu
- Department of Spine Surgery, Section II, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510610, P.R. China
- Department of Orthopedics, Orthopaedic Hospital of Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Guangzhou, Guangdong 510280, P.R. China
| | - Guozheng Zhu
- Division of Orthopedics and Traumatology, Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Canjun Zeng
- Department of Orthopedics, Orthopaedic Hospital of Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Guangzhou, Guangdong 510280, P.R. China
- Department of Foot and Ankle Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510610, P.R. China
| | - Song Yuan
- Department of Orthopedics, Linzhi People's Hospital, Linzhi, Tibet 860000, P.R. China
| | - Yuepeng Qian
- Department of Orthopedics, Orthopaedic Hospital of Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Guangzhou, Guangdong 510280, P.R. China
- Department of Pediatric Orthopedics, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510610, P.R. China
| | - Zelin Ye
- Division of Orthopedics and Traumatology, Department of Orthopedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Shanwen Zhao
- Department of Orthopedics, Orthopaedic Hospital of Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Guangzhou, Guangdong 510280, P.R. China
- Department of Foot and Ankle Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510610, P.R. China
| | - Runguang Li
- Department of Orthopedics, Orthopaedic Hospital of Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510610, P.R. China
- Guangdong Provincial Key Laboratory of Bone and Joint Degenerative Diseases, Guangzhou, Guangdong 510280, P.R. China
- Department of Foot and Ankle Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510610, P.R. China
- Department of Orthopedics, Linzhi People's Hospital, Linzhi, Tibet 860000, P.R. China
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8
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Song CX, Liu SY, Zhu WT, Xu SY, Ni GX. Excessive mechanical stretch‑mediated osteoblasts promote the catabolism and apoptosis of chondrocytes via the Wnt/β‑catenin signaling pathway. Mol Med Rep 2021; 24:593. [PMID: 34165157 PMCID: PMC8222797 DOI: 10.3892/mmr.2021.12232] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 05/05/2021] [Indexed: 02/05/2023] Open
Abstract
Excessive biomechanical loading is considered an important cause of osteoarthritis. Although the mechanical responses of chondrocytes and osteoblasts have been investigated, their communication during mechanical loading and the underlying molecular mechanisms are not yet fully known. The present study investigated the effects of excessive mechanically stretched osteoblasts on the metabolism and apoptosis of chondrocytes, and also assessed the involvement of the Wnt/β‑catenin signaling pathway. In the present study, rat chondrocytes and osteoblasts were subjected to mechanical tensile strain, and an indirect chondrocyte‑osteoblast co‑culture model was established. Reverse transcription‑quantitative PCR and western blotting were performed to determine the expression levels of genes and proteins of interest. An ELISA was performed to investigate the levels of cytokines, including matrix metalloproteinase (MMP) 13, MMP 3, interleukin‑6 (IL‑6) and prostaglandin E2 (PG E2), released from osteoblasts. Flow cytometry was performed to detect the apoptosis of chondrocytes exposed to stretched osteoblast conditioned culture medium. The levels of MMP 13, IL‑6 and PG E2 increased significantly in the supernatants of stretched osteoblasts compared with the un‑stretched group. By contrast, the mRNA expression levels of Collagen 1a and alkaline phosphatase were significantly decreased in osteoblasts subjected to mechanical stretch compared with the un‑stretched group. The mRNA expression level of Collagen 2a was significantly decreased, whereas the expression levels of MMP 13 and a disintegrin and metalloproteinase with thrombospondin‑like motifs 5 were significantly increased in chondrocytes subjected to mechanical stretch compared with the un‑stretched group. In the co‑culture model, the results indicated that excessive mechanically stretched osteoblasts induced the catabolism and apoptosis of chondrocytes, which was partly inhibited by Wnt inhibitor XAV‑939. The results of the present study demonstrated that excessive mechanical stretch led to chondrocyte degradation and inhibited osteoblast osteogenic differentiation; furthermore, excessive mechanically stretched osteoblasts induced the catabolism and apoptosis of chondrocytes via the Wnt/β‑catenin signaling pathway.
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Affiliation(s)
- Cheng-Xian Song
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510150, P.R. China
| | - Sheng-Yao Liu
- Department of Orthopedics, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Wen-Ting Zhu
- Department of Pharmacy, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510150, P.R. China
| | - Shao-Yong Xu
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Guo-Xin Ni
- Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
- School of Sport Medicine and Rehabilitation, Beijing Sport University, Beijing 100084, P.R. China
- Correspondence to: Professor Guo-Xin Ni, School of Sport Medicine and Rehabilitation, Beijing Sport University, 48 Xinxi Road, Haidian, Beijing 100084, P.R. China, E-mail:
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