Acta Biochimica et Biophysica Sinica (Jun 2023)

CH02 peptide promotes ex vivo expansion of umbilical cord blood-derived CD34<sup>+</sup> hematopoietic stem/progenitor cells

  • Yang Yiqi,
  • Zhang Bihui,
  • Xie Junye,
  • Li Jingsheng,
  • Liu Jia,
  • Liu Rongzhan,
  • Zhang Linhao,
  • Zhang Jinting,
  • Su Zijian,
  • Li Fu,
  • Zhang Leisheng,
  • Hong An,
  • Chen Xiaojia

DOI
https://doi.org/10.3724/abbs.2023047
Journal volume & issue
Vol. 55
pp. 1630 – 1639

Abstract

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Umbilical cord blood (UCB) is an advantageous source for hematopoietic stem/progenitor cell (HSPC) transplantation, yet the current strategies for large-scale and cost-effective UCB-HSPC preparation are still unavailable. To overcome these obstacles, we systematically evaluate the feasibility of our newly identified CH02 peptide for ex vivo expansion of CD34+ UCB-HSPCs. We herein report that the CH02 peptide is specifically enriched in HSPC proliferation via activating the FLT3 signaling. Notably, the CH02-based cocktails are adequate for boosting 12-fold ex vivo expansion of UCB-HSPCs. Meanwhile, CH02-preconditioned UCB-HSPCs manifest preferable efficacy upon wound healing in diabetic mice via bidirectional orchestration of proinflammatory and anti-inflammatory factors. Together, our data indicate the advantages of the CH02-based strategy for ex vivo expansion of CD34+ UCB-HSPCs, which will provide new strategies for further development of large-scale HSPC preparation for clinical purposes.

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