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Qian Y, Chu G, Zhang L, Wu Z, Wang Q, Guo JJ, Zhou F. M2 macrophage-derived exosomal miR-26b-5p regulates macrophage polarization and chondrocyte hypertrophy by targeting TLR3 and COL10A1 to alleviate osteoarthritis. J Nanobiotechnology 2024; 22:72. [PMID: 38374072 PMCID: PMC10877765 DOI: 10.1186/s12951-024-02336-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024] Open
Abstract
Osteoarthritis (OA) is one of the most prevalent chronic musculoskeletal diseases among the elderly population. In this study, macrophage-derived exosomes were isolated and identified. Exosomes were subjected to microRNA (miRNA) sequencing and bioinformatic analysis, and differentially expressed miRNAs were verified. miR-26b-5p target genes were confirmed through target-site mutation combined with a dual-luciferase reporter assay. The effects of miR-26b-5p on macrophage polarization and chondrocyte hypertrophy were assessed in vitro. miR-26b-5p agomir was applied to mice with OA induced by anterior cruciate ligament transection (ACLT). The therapeutic effects of miR-26b-5p were evaluated via pain behavior experiments and histological observations. In vitro, miR-26b-5p repolarized M1 macrophages to an anti-inflammatory M2 type by targeting the TLR3 signaling pathway. miR-26b-5p could target COL10A1, further inhibiting chondrocyte hypertrophy induced by M1 macrophage-conditioned medium (M1-CM). In vivo, miR-26b-5p agomir ameliorated gait abnormalities and mechanical allodynia in OA mice. miR-26b-5p treatment attenuated synovitis and cartilage degeneration, thereby delaying OA progression. In conclusion, M2 macrophage-derived exosomal miR-26b-5p could protect articular cartilage and ameliorate gait abnormalities in OA mice by targeting TLR3 and COL10A1. miR-26b-5p further affected macrophage polarization and chondrocyte hypertrophy. Thus, this exosomal miR-26b-5p-based strategy might be a potential method for OA treatment.
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Affiliation(s)
- Yufan Qian
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China
| | - Genglei Chu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China
| | - Lei Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China
| | - Zhikai Wu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China
| | - Qiuyuan Wang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China
| | - Jiong Jiong Guo
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China.
| | - Feng Zhou
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, No. 899 Ping Hai Road, Suzhou, Jiangsu, China.
- Orthopedic Institute, Medical College, Soochow University, Suzhou, Jiangsu, China.
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