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Lin S, Li H, Wu B, Shang J, Jiang N, Peng R, Xing B, Xu X, Lu H. TGF-β1 regulates chondrocyte proliferation and extracellular matrix synthesis via circPhf21a-Vegfa axis in osteoarthritis. Cell Commun Signal 2022; 20:75. [PMID: 35637489 PMCID: PMC9150374 DOI: 10.1186/s12964-022-00881-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 04/08/2022] [Indexed: 12/05/2022] Open
Abstract
Background The transforming growth factor-beta (TGF-β) signaling pathway is an important pathway associated with the pathogenesis of osteoarthritis (OA). This study was to investigate the involvement of circRNAs in the TGF-β signaling pathway. Methods Cell Counting Kit-8 (CCK-8) assay and 5-ethynyl-2′-deoxyuridine (EdU) assay were used to detect the proliferation of primary mouse chondrocytes (PMCs). RNA-sequencing together with bioinformatics analysis were used to systematically clarify TGF-β1 induced alternations of circRNAs in PMCs. The regulatory and functional role of circPhf21a was examined in PMCs. Downstream targets of circPhf21a were explored by RNA-sequencing after overexpression of circPhf21a and verified by RT-qPCR in PMCs. Finally, the role and mechanism of circPhf21a in OA were explored in mouse models. Results We found that TGF-β1 promoted the proliferation of PMCs. Meanwhile, RT-qPCR and western blotting indicated that TGF-β1 promoted extracellular matrix (ECM) anabolism. RNA-sequencing revealed that a total of 36 circRNAs were differentially expressed between PMCs treated with and without TGF-β1. Of these, circPhf21a was significantly decreased by TGF-β1. Furthermore, circPhf21a knockdown promoted the proliferation and ECM synthesis of PMCs, whereas overexpression of circPhf21a showed the opposite effects. Mechanically, the expression profiles of the mRNAs revealed that Vegfa may be the target of circPhf21a. Additionally, we found that circPhf21a was significantly upregulated in the mouse OA model, and inhibition of circPhf21a significantly relieved the progression of OA. Conclusions Our results found that TGF-β1 promoted the proliferation and ECM synthesis of PMCs via the circPhf21a-Vegfa axis, which may provide novel therapeutic targets for OA treatment. Video abstract
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-022-00881-9.
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Affiliation(s)
- Shiyuan Lin
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Huizi Li
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China.,Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, 330000, Jiangxi Province, China
| | - Biao Wu
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Jie Shang
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Ning Jiang
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Rong Peng
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Baizhou Xing
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China
| | - Xianghe Xu
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China.
| | - Huading Lu
- Department of Orthopaedics, The Fifth Affiliated Hospital of Sun Yat-Sen University, No. 52, Meihua East Road, Xiangzhou District, Zhuhai, 519000, Guangdong, China.
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Comprehensive analysis of lncRNA and mRNA based on expression microarray profiling reveals different characteristics of osteoarthritis between Tibetan and Han patients. J Orthop Surg Res 2021; 16:133. [PMID: 33579305 PMCID: PMC7879695 DOI: 10.1186/s13018-021-02213-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/06/2021] [Indexed: 12/12/2022] Open
Abstract
Background Osteoarthritis (OA) is thought to be the most prevalent chronic joint disease, especially in Tibet of China. Here, we aimed to explore the integrative lncRNA and mRNA landscape between the OA patients of Tibet and Han. Methods The lncRNA and mRNA expression microarray profiling was performed by SurePrint G3 Human Gene Expression 8x60K v2 Microarray in articular cartilage samples from OA patients of Han nationality and Tibetans, followed by GO, KEGG, and trans-regulation and cis-regulation analysis of lncRNA and mRNA. Results We found a total of 117 lncRNAs and 297 mRNAs differently expressed in the cartilage tissues of Tibetans (n = 5) comparing with those of Chinese Han (n = 3), in which 49 lncRNAs and 158 mRNAs were upregulated, and 68 lncRNAs and 139 mRNAs were downregulated. GO and KEGG analysis showed that several unreported biological processes and signaling pathways were particularly identified. LncRNA-mRNA co-expression analysis revealed a remarkable lncRNA-mRNA relationship, in which OTOA may play a critical role in the different mechanisms of the OA progression between Tibetans and Chinese Han. Conclusion This study identified different lncRNA/mRNA expression profiling between OA patients of Tibetans and Han, which were involved in many characteristic biological processes and signaling pathways. Supplementary Information The online version contains supplementary material available at 10.1186/s13018-021-02213-y.
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Xu G, Liu C, Jiang J, Liang T, Yu C, Qin Z, Zhang Z, Lu Z, Zhan X. A novel mechanism of intervertebral disc degeneration: imbalance between autophagy and apoptosis. Epigenomics 2020; 12:1095-1108. [PMID: 32285684 DOI: 10.2217/epi-2020-0079] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Aim: To identify a key competitive endogenous RNA network for intervertebral disc degeneration. Materials & methods: Based on circular RNA, microRNA and mRNA expression profiles of nucleus pulposus cells, a variety of bioinformatics methods were used to screen key molecular structures and construct competitive endogenous RNA networks. Results: 190 upregulated genes and 77 downregulated genes were identified. Gene ontology/Kyoto Encyclopedia of Genes and Genomes functional analysis showed that autophagy was out of balance with apoptosis. Nine hub genes, five hub microRNAs and eight hub circular RNAs were obtained through progressive reverse prediction and verification. Conclusion: We believe that disc degeneration is caused by an imbalance between autophagy and apoptosis in nucleus pulposus cells, which may provide nonsurgical treatment for the future delay or prevention of spinal degenerative diseases associated with intervertebral disc degeneration.
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Affiliation(s)
- Guoyong Xu
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Chong Liu
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China.,Spine and Osteopathy Ward, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Jie Jiang
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Tuo Liang
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Chaojie Yu
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Zhaojie Qin
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Zide Zhang
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Zhaojun Lu
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China
| | - Xinli Zhan
- Guangxi Collaborative Innovation Center for Biomedicine, Guangxi Medical University, Nanning 530021, PR China.,Spine and Osteopathy Ward, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
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Intraarticular Ligament Degeneration Is Interrelated with Cartilage and Bone Destruction in Osteoarthritis. Cells 2019; 8:cells8090990. [PMID: 31462003 PMCID: PMC6769780 DOI: 10.3390/cells8090990] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/18/2019] [Accepted: 08/20/2019] [Indexed: 12/16/2022] Open
Abstract
Osteoarthritis (OA) induces inflammation and degeneration of all joint components including cartilage, joint capsule, bone and bone marrow, and ligaments. Particularly intraarticular ligaments, which connect the articulating bones such as the anterior cruciate ligament (ACL) and meniscotibial ligaments, fixing the fibrocartilaginous menisci to the tibial bone, are prone to the inflamed joint milieu in OA. However, the pathogenesis of ligament degeneration on the cellular level, most likely triggered by OA associated inflammation, remains poorly understood. Hence, this review sheds light into the intimate interrelation between ligament degeneration, synovitis, joint cartilage degradation, and dysbalanced subchondral bone remodeling. Various features of ligament degeneration accompanying joint cartilage degradation have been reported including chondroid metaplasia, cyst formation, heterotopic ossification, and mucoid and fatty degenerations. The entheses of ligaments, fixing ligaments to the subchondral bone, possibly influence the localization of subchondral bone lesions. The transforming growth factor (TGF)β/bone morphogenetic (BMP) pathway could present a link between degeneration of the osteochondral unit and ligaments with misrouted stem cell differentiation as one likely reason for ligament degeneration, but less studied pathways such as complement activation could also contribute to inflammation. Facilitation of OA progression by changed biomechanics of degenerated ligaments should be addressed in more detail in the future.
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Ma L, Yang ZQ, Ding JL, Liu S, Guo B, Yue ZP. Function and regulation of transforming growth factor β1 signalling in antler chondrocyte proliferation and differentiation. Cell Prolif 2019; 52:e12637. [PMID: 31168899 PMCID: PMC6668978 DOI: 10.1111/cpr.12637] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Chondrocyte proliferation and differentiation are crucial for endochondral ossification, but their regulatory mechanism remains unclear. The present study aimed to determine the physiological function of TGFβ1 signalling in the proliferation and differentiation of antler chondrocytes and explore its relationship with Notch, Shh signalling and Foxa. MATERIALS AND METHODS Immunofluorescence, Western blot, MTS assay, flow cytometry, RNA interference and real-time PCR were used to analyse the function and regulatory mechanisms of TGFβ1 signalling in antler chondrocyte proliferation and differentiation. RESULTS TGFβ1, TGFBR1 and TGFBR2 were highly expressed in antler cartilage. TGFβ1 promoted chondrocyte proliferation, increased the proportion of S-phase cells and induced the expression of hypertrophic chondrocyte markers Col X, Runx2 and Alpl. However, this induction was weakened by TGFβ receptor inhibitor SB431542 and Smad3 inhibitor SIS3. Simultaneously, TGFβ1 activated Notch and Shh signalling whose blockage attenuated the above effects of rTGFβ1, whereas addition of rShh rescued the defects in chondrocyte proliferation and differentiation elicited by SB431542 and SIS3. Further analysis revealed that inhibition of Notch signalling impeded TGFβ1 activation of the Shh pathway. Knockdown of Foxa1, Foxa2 and Foxa3 abrogated the effects of TGFβ1 on chondrocyte differentiation. Notch and Shh signalling mediated the regulation of Foxa transcription factors by TGFβ1. CONCLUSIONS TGFβ1 signalling could induce the proliferation and differentiation of antler chondrocytes through Notch-Shh-Foxa pathway.
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Affiliation(s)
- Li Ma
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zhan-Qing Yang
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Jun-Li Ding
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Shu Liu
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Bin Guo
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zhan-Peng Yue
- College of Veterinary Medicine, Jilin University, Changchun, China
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