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<p>Resident leptin-receptor-expressing (LepR<sup>+</sup>) cells senescence in the aged bone marrow impairs the regenerative capacity of osteo- and other lineages of cells. In this study, a LepR<sup>+</sup> cell-targeting nitric oxide (NO) nanopump with in vivo self-controlled turn-on ability was constructed to rejuvenate the LepR<sup>+</sup> cells in the aged bone marrow. The nanopump co-entrapped hydrophobic chemiluminescence substrate and NO donor into the matrix of amphiphilic polymer through a nanoprecipitation process. The chemiluminescence substrate in the NO nanopump automatically reacts with the accumulated H<sub>2</sub>O<sub>2</sub> in the aged bone marrow and then directly transfers the chemical energy to the NO donor to induce in situ NO release. The NO produced in situ within the aged bone marrow triggered the regeneration of the osteoblastic and the other niches in vivo through activating the glycolysis signaling in the senescent LepR<sup>+</sup> cells. Conclusively, the constructed NO nanopump is a promising tool to counter aging-induced bone marrow disorders.</p>

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Regenerating aged bone marrow via a nitric oxide nanopump

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Ke Li,
  • Sihan Hu,
  • Hanwen Li,
  • Wenzheng Lin,
  • Duoyi Zhao,
  • Zhuobin Xu,
  • Chun Pan,
  • Huihui Wang,
  • Dandan Li,
  • Jingjing Liu,
  • Hao Chen

摘要

Resident leptin-receptor-expressing (LepR+) cells senescence in the aged bone marrow impairs the regenerative capacity of osteo- and other lineages of cells. In this study, a LepR+ cell-targeting nitric oxide (NO) nanopump with in vivo self-controlled turn-on ability was constructed to rejuvenate the LepR+ cells in the aged bone marrow. The nanopump co-entrapped hydrophobic chemiluminescence substrate and NO donor into the matrix of amphiphilic polymer through a nanoprecipitation process. The chemiluminescence substrate in the NO nanopump automatically reacts with the accumulated H2O2 in the aged bone marrow and then directly transfers the chemical energy to the NO donor to induce in situ NO release. The NO produced in situ within the aged bone marrow triggered the regeneration of the osteoblastic and the other niches in vivo through activating the glycolysis signaling in the senescent LepR+ cells. Conclusively, the constructed NO nanopump is a promising tool to counter aging-induced bone marrow disorders.