Nanomachine-Based Flexible Bubbles for Alleviating Long QT Syndrome
Weixin Wang1,2,3, Yu Dong3, Lin Zhang3
1Qingdao Academy of Chinese Medicine Sciences, Shandong University of Traditional Chinese Medicine, Qingdao, 266112, P. R. China.
Advanced Healthcare Materials
|September 16, 2025
Summary
New nanomachines deliver phycocyanin (PC) to protect hearts in long QT syndrome (LQTS) models. This biocompatible approach stabilizes heart function and reduces arrhythmias, offering a promising new treatment strategy.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cardiology
Background:
- Long QT syndrome (LQTS) involves prolonged ventricular repolarization, increasing risks of fatal arrhythmias and sudden cardiac death.
- Current LQTS treatments like medication and surgery have limitations, including patient discomfort and potential disease recurrence.
Purpose of the Study:
- To develop and evaluate a novel nanomachine-based drug delivery system for phycocyanin (PC) to protect the heart in a mouse model of LQTS.
- To assess the efficacy of PC-loaded nanomachines in stabilizing electrophysiology and improving cardiac function in LQTS.
Main Methods:
- Fabrication of biocompatible, carrier-free nanomachines by polymerizing L-arginine (L-Arg) with PC, followed by gold sputtering for nitric oxide (NO) generation.
- In vivo administration of nanomachines in a mouse model of LQTS, utilizing NO release for propulsion and PC delivery.
- ROS-triggered accumulation and diffusion of PC at the site of cardiac damage to attenuate myocardial injury.
Main Results:
- The nanomachines successfully delivered PC to the heart, improving cardiac function and reducing arrhythmias in LQTS mice.
- Asymmetric NO release facilitated targeted transport and accumulation of nanomachines.
- ROS-triggered PC diffusion effectively attenuated heart damage and modulated key factors involved in LQTS pathology.
Conclusions:
- This novel nanomachine system demonstrates potential for effective, targeted delivery of PC for heart protection in LQTS.
- The approach shows promise in modulating myocardial gap junction proteins, the hypoxic environment, and electrical remodeling, warranting further clinical investigation.
