J. Mater. Sci. Technol. ›› 2023, Vol. 142: 240-252.DOI: 10.1016/j.jmst.2022.09.061

• Research article • Previous Articles     Next Articles

Wharton's jelly MSC-derived extracellular vehicles—loaded hyaluronic acid-alginate adhesives for treatment of osteoarthritis

Yanhong Zhaoa,1, Xige Zhaoa,d,1, Hainan Xua,1, Yi Xinga, Tengling Wub, Xun Sunc, Mingjie Kuang, Xinlong Mac, Wenguang Liub,*, Qiang Yangc,*   

  1. aSchool and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China;
    bSchool of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, China;
    cDepartment of Spine Surgery, Tianjin Hospital, Tianjin University, Tianjin 300211, China;
    dLaboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing 100050, China;
    eDepartment of Orthopedics, the Provincial Hospital Affiliated to Shandong University, Shandong 250014, China
  • Received:2022-05-13 Revised:2022-05-13 Accepted:2022-05-13 Online:2022-11-29
  • Contact: *E-mail addresses: . wgliu@tju.edu.cn (W. Liu), yangqiang1980@126.com (Q. Yang)
  • About author:1These authors contributed equally to this work.

Abstract: The repair of cartilage injury caused by osteoarthritis (OA) has long plagued clinicians. Mesenchymal stem cell (MSC)-derived small extracellular vesicles (sEVs) show great potential in cartilage regeneration and immunoregulation to realise cell-free therapy. However, unprotected sEVs are prone to be washed away by the flow of fluids and degraded in vivo. In this work, we successfully revealed that human Wharton's jelly of umbilical cord-derived MSC (hWJMSC) sEVs promote proliferation, inhibit apoptosis, and attenuate the inflammation of chondrocytes in vitro. In light of the long period required for cartilage regeneration, we synthesised an injectable and adhesive aldehyded sodium alginate crosslinked acylhydrazide-modified hyaluronic acid (ALG-CHO/HHA) hydrogel loaded with sEVs to boost the reparative effect of the sEVs. The hydrogel-bearing sEVs was injected into cartilage defects where they adhered to the cartilage surface. In this configuration, the sEVs were delivered in a sustainable manner with the degradation of the hydrogel at the injury sites, thus contributing to highly efficient cartilage repair by regulating the regenerative and immune microenvironment. The ALG-CHO/HHA-sEV platform meets the clinical demand for long-lasting repair with a single injection. Thus, this work provides a new idea and theoretical basis for the clinical application of sEVs in the treatment of OA.

Key words: Extracellular vesicles, Hydrogel, Osteoarthritis, Cartilage regeneration