ArticleJCI insight2025
A cardiac fibroblast-enriched micropeptide regulates inflammation in ischemia/reperfusion injury.
Article in JCI insight, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Multimodality Molecular Profiling Nominates Targetable Mechanisms in Progressive RV Dysfunction.Circulation research · 2026Article
- The dark genome in cardiovascular medicine.European heart journal · 2026Review
- Microproteins in Human Physiology and Pathology.Biochemistry · 2026Review
- Multimodality Molecular Profiling Nominates Targetable Mechanisms in Progressive RV Dysfunction.bioRxiv : the preprint server for biology · 2026Article
- Gene Therapy TargetingMedComm · 2025Article
- Targeting T cell-activating NETs in uveitis.Nature reviews. Rheumatology · 2025Article
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Authors and funding
16 authors.
Funding
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Abstract
Inflammation is a critical pathological process in myocardial infarction. Although immunosuppressive therapies can mitigate inflammatory responses and improve outcomes in myocardial infarction, they also increase the risk of infections. Identifying novel regulators of local cardiac inflammation could provide safer therapeutic targets for myocardial ischemia/reperfusion injury. In this study, we identified a previously uncharacterized micropeptide, which we named Inflammation Associated MicroPeptide (IAMP). IAMP is predominantly expressed in cardiac fibroblasts, and its expression is closely associated with cardiac inflammation. Downregulation of IAMP promotes, whereas its overexpression prevents, the transformation of cardiac fibroblasts into a more inflammatory phenotype under stressed/stimulated conditions, as evidenced by changes in the expression and secretion of proinflammatory cytokines. Consequently, loss of IAMP function leads to uncontrolled inflammation and worsens cardiac injury following ischemia/reperfusion surgery. Mechanistically, IAMP promotes the degradation of HIF-1α by interacting with its stabilizing partner HSP90 and, thus, suppresses the transcription of proinflammatory genes downstream of HIF-1α. This study underscores the significance of fibroblast-mediated inflammation in cardiac ischemia/reperfusion injury and highlights the therapeutic potential of targeting micropeptides for myocardial infarction.
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