Scholarlink

<p>Myocardial ischemia/reperfusion (I/R) injury is exacerbated by inflammation, yet the upstream triggers of this cascade and their amenability to therapeutic intervention remain unclear. The cyclic GMP-AMP synthase-stimulator of interferon genes (cGAS-STING) pathway is a driver of sterile inflammation in I/R injury, but whether its activation can be suppressed via enhanced mitochondrial quality control has not been explored. We hypothesized that augmenting PARKIN-mediated mitophagy would limit cGAS-STING activation and attenuate I/R injury by clearing damaged mitochondria and preventing the release of its agonist, mitochondrial DNA (mtDNA). Cardiomyocyte-specific PARKIN overexpression in mice was well tolerated at baseline and conferred cardioprotection following I/R injury, attenuating adverse remodeling and preserving cardiac function. Mechanistically, PARKIN overexpression enhanced mitophagy, which limited cytosolic mtDNA accumulation, thereby inhibiting cGAS-STING activation and its downstream inflammatory response.&#xa0;The therapeutic potential of this pathway was further supported by lentiviral PARKIN delivery in wild-type mouse hearts, which also improved cardiac outcomes following I/R injury. Taken together, our findings delineate a PARKIN-mtDNA-cGAS-STING axis as a regulatory mechanism of I/R injury and support PARKIN augmentation as a potential therapeutic strategy.</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

PARKIN overexpression confers cardioprotection via suppressing the mtDNA-cGAS-STING axis in myocardial ischemia/reperfusion injury

  • 期刊论文

  • 发表日期：

    2026年3月13日

查看全文
  • Yujing Li,
  • Yuhan Wang,
  • Hao Zhang,
  • Pengfei Xu,
  • Xiaosu Yuan,
  • Hailong Yuan,
  • Chaofan Yang,
  • Yanan Zhou,
  • Jianghua Shen,
  • Heng Du,
  • Zeyu Gao,
  • Jingyi Zang,
  • Siwen Liang,
  • Jing Qu,
  • Moshi Song

摘要

Myocardial ischemia/reperfusion (I/R) injury is exacerbated by inflammation, yet the upstream triggers of this cascade and their amenability to therapeutic intervention remain unclear. The cyclic GMP-AMP synthase-stimulator of interferon genes (cGAS-STING) pathway is a driver of sterile inflammation in I/R injury, but whether its activation can be suppressed via enhanced mitochondrial quality control has not been explored. We hypothesized that augmenting PARKIN-mediated mitophagy would limit cGAS-STING activation and attenuate I/R injury by clearing damaged mitochondria and preventing the release of its agonist, mitochondrial DNA (mtDNA). Cardiomyocyte-specific PARKIN overexpression in mice was well tolerated at baseline and conferred cardioprotection following I/R injury, attenuating adverse remodeling and preserving cardiac function. Mechanistically, PARKIN overexpression enhanced mitophagy, which limited cytosolic mtDNA accumulation, thereby inhibiting cGAS-STING activation and its downstream inflammatory response. The therapeutic potential of this pathway was further supported by lentiviral PARKIN delivery in wild-type mouse hearts, which also improved cardiac outcomes following I/R injury. Taken together, our findings delineate a PARKIN-mtDNA-cGAS-STING axis as a regulatory mechanism of I/R injury and support PARKIN augmentation as a potential therapeutic strategy.