Cabbage Exosome-Like Nanoparticles Encapsulating Small Noncoding tsRNA Prevent Postinjury Arterial Restenosis

Area of Science:

• Biomedical Engineering
• Molecular Biology
• Cardiovascular Research

Background:

• Postinjury restenosis, characterized by neointimal hyperplasia and inflammation, complicates peripheral arterial disease treatments.
• Current antiproliferative drugs offer limited efficacy due to short action duration and poor regulation.

Purpose of the Study:

• To identify novel therapeutic targets for post-endovascular therapy restenosis.
• To evaluate the efficacy of cabbage exosome-like nanoparticles (CELNs) as a targeted delivery system for nucleic acid therapeutics.

Main Methods:

• Sequencing analysis of an animal restenosis model identified tRF-49:69-chrM.Trp-TCA (tRF-Trp-TCA).
• In vivo studies assessed CELN targeting of injured vasculature and therapeutic stability.
• A rat carotid artery balloon injury model was used to evaluate neointimal hyperplasia inhibition.

Main Results:

• tRF-Trp-TCA demonstrated regulatory effects on endothelial cell migration and inflammation.
• CELNs effectively targeted injured arteries, enhanced therapeutic stability, and inhibited neointimal hyperplasia.
• CELN-loaded tRF-Trp-TCA showed good biocompatibility and efficacy in a rat carotid artery injury model.

Conclusions:

• tRF-Trp-TCA is a crucial target for treating arterial injury-induced restenosis.
• CELNs represent a novel and effective delivery system for tRF-Trp-TCA, offering a promising strategy for restenosis mitigation.
• This study provides new insights for noninvasive treatments for restenosis following endovascular therapy.