J. Mater. Sci. Technol. ›› 2023, Vol. 138: 17-28.DOI: 10.1016/j.jmst.2022.08.028

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Decellularized extracellular matrix and mesenchymal stem cells promote recovery in traumatic brain injury by synergistically enhancing neurogenesis and attenuating neuroinflammation

Xuewei Zhang, Bixue Wang, Hua Hong, Ying Wang, Jiashang Liu, Changsheng Liu*, Xi Chen*   

  1. Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center for Biomaterials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2022-04-10 Revised:2022-06-27 Accepted:2022-08-06 Published:2023-03-01 Online:2023-03-03
  • Contact: * E-mail addresses: liucs@ecust.edu.cn (C. Liu), chenxi@ecust.edu.cn (X. Chen).

Abstract: Damaged neurons and harsh microenvironments contribute to the injury cascades following traumatic brain injury (TBI). Mesenchymal stem cell (MSC) therapy is considered a viable choice for brain injury treatment; however, its clinical use is hindered by limited engraftment, low survival ratio, and uncontrolled differentiation. Herein, the decellularized brain extracellular matrix (dBECM) was prepared through a new method as a delivery system for MSCs. dBECM-based hydrogel with favorable biochemical and biomechanical features provides a microenvironment for MSCs in nerve repair. The MSCs-encapsulated dBECM-based hydrogel is shown to improve neuron compensation and structural regeneration, alleviate neuroinflammation, and promote M1-to-M2 polarization of microglia. Our results first demonstrate that the combination of dBECM and MSCs is a critical vehicle to promote TBI repair from neurogenesis and immunoregulation, showing promise for the physiological recovery of neurogenic diseases and injuries.

Key words: ECM, Stem cells, Brain injury, Neurogenesis, Neuroinflammation