Frontiers in Cell and Developmental Biology (Jul 2021)

Meniscal Regenerative Scaffolds Based on Biopolymers and Polymers: Recent Status and Applications

  • Hao Li,
  • Hao Li,
  • Hao Li,
  • Hao Li,
  • Pinxue Li,
  • Pinxue Li,
  • Pinxue Li,
  • Pinxue Li,
  • Zhen Yang,
  • Zhen Yang,
  • Zhen Yang,
  • Zhen Yang,
  • Cangjian Gao,
  • Cangjian Gao,
  • Cangjian Gao,
  • Cangjian Gao,
  • Liwei Fu,
  • Liwei Fu,
  • Liwei Fu,
  • Liwei Fu,
  • Zhiyao Liao,
  • Zhiyao Liao,
  • Zhiyao Liao,
  • Zhiyao Liao,
  • Tianyuan Zhao,
  • Tianyuan Zhao,
  • Tianyuan Zhao,
  • Tianyuan Zhao,
  • Fuyang Cao,
  • Fuyang Cao,
  • Fuyang Cao,
  • Wei Chen,
  • Wei Chen,
  • Wei Chen,
  • Wei Chen,
  • Yu Peng,
  • Zhiguo Yuan,
  • Xiang Sui,
  • Xiang Sui,
  • Xiang Sui,
  • Shuyun Liu,
  • Shuyun Liu,
  • Shuyun Liu,
  • Quanyi Guo,
  • Quanyi Guo,
  • Quanyi Guo,
  • Quanyi Guo

DOI
https://doi.org/10.3389/fcell.2021.661802
Journal volume & issue
Vol. 9

Abstract

Read online

Knee menisci are structurally complex components that preserve appropriate biomechanics of the knee. Meniscal tissue is susceptible to injury and cannot heal spontaneously from most pathologies, especially considering the limited regenerative capacity of the inner avascular region. Conventional clinical treatments span from conservative therapy to meniscus implantation, all with limitations. There have been advances in meniscal tissue engineering and regenerative medicine in terms of potential combinations of polymeric biomaterials, endogenous cells and stimuli, resulting in innovative strategies. Recently, polymeric scaffolds have provided researchers with a powerful instrument to rationally support the requirements for meniscal tissue regeneration, ranging from an ideal architecture to biocompatibility and bioactivity. However, multiple challenges involving the anisotropic structure, sophisticated regenerative process, and challenging healing environment of the meniscus still create barriers to clinical application. Advances in scaffold manufacturing technology, temporal regulation of molecular signaling and investigation of host immunoresponses to scaffolds in tissue engineering provide alternative strategies, and studies have shed light on this field. Accordingly, this review aims to summarize the current polymers used to fabricate meniscal scaffolds and their applications in vivo and in vitro to evaluate their potential utility in meniscal tissue engineering. Recent progress on combinations of two or more types of polymers is described, with a focus on advanced strategies associated with technologies and immune compatibility and tunability. Finally, we discuss the current challenges and future prospects for regenerating injured meniscal tissues.

Keywords