Scholarlink

Purpose <p>This study investigates the cardioprotective effects of focused ultrasound stimulation (FUS) as a novel, noninvasive intervention for mitigating acute myocardial ischemia/reperfusion (I/R) injury.</p> Methods <p>In rat I/R models (30-min left anterior descending coronary artery (LAD) occlusion followed by 2-/24-h reperfusion), FUS was applied to the right cervical vagus nerve during early reperfusion (10–60 min post-reperfusion). The effects of FUS were assessed by analyzing inflammatory markers, arrhythmia incidence, pathological changes, echocardiographic parameters, pro-/anti-oxidative biomarkers, myocardial fibrosis, and infarct size. To elucidate the underlying mechanism, vagotomy and atropine administration were performed.</p> Results <p>FUS significantly reduced heart rate and inflammation in the 2-h reperfusion model. Compared to the I/R group, the I/R + FUS group exhibited markedly decreased premature ventricular contractions (221.00 ± 166.93 vs 83.11 ± 34.08, <i>p</i> &lt; 0.05), ventricular tachycardia and ventricular fibrillation (16.67 ± 10.68 vs. 3.67 ± 3.24, <i>p</i> &lt; 0.01), and arrhythmia scores during reperfusion (2.44 ± 1.13 vs. 0.67 ± 0.50, <i>p</i> &lt; 0.01). In the 24-h reperfusion model, FUS significantly reduced myocardial fibrosis and infarct size (infarct size/area at risk 49.60 ± 9.17% vs. 20.73 ± 4.91%, <i>p</i> &lt; 0.001) and preserved left ventricular ejection fraction (35.68 ± 9.95% vs 56.73 ± 2.64%, <i>p</i> &lt; 0.001). The protective effects of FUS were abolished by vagotomy or atropine, suggesting the cholinergic anti-inflammatory pathway as a potential mechanism.</p> Conclusion <p>Targeted FUS neuromodulation exerts acute and sustained cardioprotection against I/R injury primarily through cholinergic anti-inflammatory mechanisms, offering a safer and more accessible alternative to traditional treatments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Vagus Nerve Stimulation by Focused Ultrasound Attenuates Acute Myocardial Ischemia/Reperfusion Injury Predominantly Through Cholinergic Anti-inflammatory Pathway

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月2日

查看全文
  • Qian Zhang,
  • Qianyun Cai,
  • Shenrong Zhong,
  • Qin Li,
  • Weibao Qiu,
  • Juefei Wu

摘要

Purpose

This study investigates the cardioprotective effects of focused ultrasound stimulation (FUS) as a novel, noninvasive intervention for mitigating acute myocardial ischemia/reperfusion (I/R) injury.

Methods

In rat I/R models (30-min left anterior descending coronary artery (LAD) occlusion followed by 2-/24-h reperfusion), FUS was applied to the right cervical vagus nerve during early reperfusion (10–60 min post-reperfusion). The effects of FUS were assessed by analyzing inflammatory markers, arrhythmia incidence, pathological changes, echocardiographic parameters, pro-/anti-oxidative biomarkers, myocardial fibrosis, and infarct size. To elucidate the underlying mechanism, vagotomy and atropine administration were performed.

Results

FUS significantly reduced heart rate and inflammation in the 2-h reperfusion model. Compared to the I/R group, the I/R + FUS group exhibited markedly decreased premature ventricular contractions (221.00 ± 166.93 vs 83.11 ± 34.08, p < 0.05), ventricular tachycardia and ventricular fibrillation (16.67 ± 10.68 vs. 3.67 ± 3.24, p < 0.01), and arrhythmia scores during reperfusion (2.44 ± 1.13 vs. 0.67 ± 0.50, p < 0.01). In the 24-h reperfusion model, FUS significantly reduced myocardial fibrosis and infarct size (infarct size/area at risk 49.60 ± 9.17% vs. 20.73 ± 4.91%, p < 0.001) and preserved left ventricular ejection fraction (35.68 ± 9.95% vs 56.73 ± 2.64%, p < 0.001). The protective effects of FUS were abolished by vagotomy or atropine, suggesting the cholinergic anti-inflammatory pathway as a potential mechanism.

Conclusion

Targeted FUS neuromodulation exerts acute and sustained cardioprotection against I/R injury primarily through cholinergic anti-inflammatory mechanisms, offering a safer and more accessible alternative to traditional treatments.