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<p>Mesenchymal stem cell (MSC) holds immense potential as candidates for cell therapy in the treatment of tendon injuries due to their remarkable ability for multiple cell differentiation. However, the proliferative and differentiation capacity of MSCs has been limited by cellular senescence during the process of expanding culture. Therefore, in this study, our aim was to maintain the beneficial properties of MSCs. We found that SETD7, a histone methyltransferase, was upregulated during ex vivo expansion of human adipose-derived mesenchymal stem cells (hAD-MSCs). Pharmacological inhibition of SETD7 with PFI-2 in hAD-MSCs cultures delayed their senescence, as evident by the diminished expression of senescent-associated genes and the maintenance of their proliferation and differentiation capacity. Upon transplantation, cell sheets derived from hAD-MSCs expanded with PFI-2 were better able to accelerate tendon repair. Therefore, the present findings reveal that SETD7 is an important target to improve the expansion of hAD-MSCs by delaying senescence, which is importance for the development of efficient stem cell-based therapeutic approaches.</p>

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Retarding human adipose-derived MSCs senescence and promoting tendon repair using cell sheet engineering with a histone methyltransferase inhibitor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月20日

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  • Junjuan Wang,
  • Ke Jian,
  • Qing Yang,
  • Chunyi Gu,
  • Jiajun Sheng,
  • Yan Zhou,
  • Hantian Yin,
  • Zhihan Zhang,
  • Kouzhen Hua,
  • Can Zhang

摘要

Mesenchymal stem cell (MSC) holds immense potential as candidates for cell therapy in the treatment of tendon injuries due to their remarkable ability for multiple cell differentiation. However, the proliferative and differentiation capacity of MSCs has been limited by cellular senescence during the process of expanding culture. Therefore, in this study, our aim was to maintain the beneficial properties of MSCs. We found that SETD7, a histone methyltransferase, was upregulated during ex vivo expansion of human adipose-derived mesenchymal stem cells (hAD-MSCs). Pharmacological inhibition of SETD7 with PFI-2 in hAD-MSCs cultures delayed their senescence, as evident by the diminished expression of senescent-associated genes and the maintenance of their proliferation and differentiation capacity. Upon transplantation, cell sheets derived from hAD-MSCs expanded with PFI-2 were better able to accelerate tendon repair. Therefore, the present findings reveal that SETD7 is an important target to improve the expansion of hAD-MSCs by delaying senescence, which is importance for the development of efficient stem cell-based therapeutic approaches.