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Role of M2 macrophages-derived extracellular vesicles in IL-1β-stimulated chondrocyte proliferation and inflammatory responses

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Abstract

M2 macrophages-derived extracellular vesicles (M2-EVs) serve as a tool for the delivery of miRNAs and play an anti-inflammatory role in diseases. This study sought to explore the role of (M2-EVs) in the proliferation and inflammatory responses of IL-1β-stimulated chondrocytes. M2 macrophages were induced and characterized, followed by isolation and characterization of M2-EVs. Chondrocytes were treated with 10 ng/mL IL-1β and co-cultured with M2 macrophages transfected with Cy3-labeled miR-370-3p. Cell viability, TNF (tumor necrosis factor)-α, IL(Interleukin)-18, IL-10, miR-370-3p, and sex-determining region Y-related high-mobility-group box transcription factor 11 (SOX11) mRNA were determined via cell counting assay kit, colony formation, ELISA, and qRT-PCR. The binding relationship between miR-370-3p and SOX11 was testified via the dual-luciferase assay. The functional rescue experiment was designed to confirm the role of SOX11. M2-EVs improved chondrocyte viability and colony formation, lowered TNF-α and IL-18, and elevated IL-10. M2-EVs delivered miR-370-3p into chondrocytes to upregulate miR-370-3p. Upregulation of miR-370-3p in M2-EVs enhanced the protective role of M2-EVs in chondrocytes. miR-370-3p inhibited SOX11 transcription. SOX11 overexpression attenuated the protective role of M2-EVs in chondrocytes. Overall, our findings suggested that M2-EVs promote proliferation and suppress inflammatory responses in IL-1β-stimulated chondrocytes via the miR-370-3p/SOX11 axis.

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The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We would like to thank all the participants for their time and effort.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to Weiwei Guo.

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The authors report no conflict of interest.

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This study got the approval of the Ethics Committee of General Hospital of Ningxia Medical University. All animal experiments followed the Guide for the Care and Use of Laboratory Animals (National Research Council (US) Committee for the Update of the Guide for the Care and Use of Laboratory Animals 2011). Extensive measures were undertaken to minimize the number and suffering of experimental animals.

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Guo, W., Su, L., Zhang, H. et al. Role of M2 macrophages-derived extracellular vesicles in IL-1β-stimulated chondrocyte proliferation and inflammatory responses. Cell Tissue Bank 24, 93–107 (2023). https://doi.org/10.1007/s10561-022-10016-6

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  • DOI: https://doi.org/10.1007/s10561-022-10016-6

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