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Bioinspired Soft Robot with Incorporated Microelectrodes
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Magnetic soft microrobots for erectile dysfunction therapy.

Shuting Wang1,2,3, Zhenqing Wang4, Zongshan Shen5

  • 1National Engineering Research Centre for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, P. R. China.

Proceedings of the National Academy of Sciences of the United States of America
|November 18, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel magnetic microrobot for delivering mesenchymal stromal cells (MSCs) to treat erectile dysfunction (ED). The microrobot improves MSC survival and efficacy, restoring erectile function by promoting tissue regeneration.

Keywords:
erectile dysfunctionimmunomodulationmesenchymal stromal cellssoft microrobots

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Erectile dysfunction (ED) significantly impacts male fertility and quality of life.
  • Mesenchymal stromal cells (MSCs) show therapeutic promise for ED, but their effectiveness is limited by poor retention and survival in target tissues.
  • Developing advanced delivery systems is crucial for enhancing MSC-based therapies.

Purpose of the Study:

  • To develop an innovative magnetic soft microrobot for improved delivery and retention of MSCs in the corpus cavernosum for ED treatment.
  • To investigate the microrobot's ability to enhance MSC survival and therapeutic efficacy.
  • To elucidate the mechanisms underlying MSC-Rob treatment-induced tissue regeneration and functional recovery.

Main Methods:

  • Fabrication of an ultrasoft hydrogel microsphere microrobot embedded with magnetic nanoparticles and functionalized with phenylboronic acid for ROS scavenging.
  • In vitro and in vivo evaluation of microrobot's shape adaptability, MSC loading, and delivery efficiency.
  • Assessment of MSC retention, survival, and therapeutic effects in rat and beagle ED models.
  • Single-cell RNA sequencing (scRNA-seq) to analyze cellular and molecular changes in the corpus cavernosum post-treatment.

Main Results:

  • The developed microrobot demonstrated excellent shape adaptability for navigating narrow blood vessels and ensuring uniform MSC distribution.
  • MSC-loaded microrobots (MSC-Rob) significantly improved MSC retention and survival compared to traditional injections.
  • MSC-Rob treatment effectively repaired corpus cavernosum tissue and restored erectile function in ED models.
  • scRNA-seq revealed that MSC-Rob promotes nerve and blood vessel regeneration by modulating macrophage populations.

Conclusions:

  • The magnetic soft microrobot offers a promising strategy for enhancing MSC delivery and therapeutic outcomes in ED.
  • This technology advances the clinical application of MSCs for ED and holds potential for other cell-based therapies.
  • The microrobot's design addresses key challenges in cell retention and survival, paving the way for more effective regenerative treatments.