ArticleAging cell2026
Mitochondrial Transplantation Rejuvenates Aging Heart by Restoring Mitophagy Flux via the HIF-3α-BNIP3 Axis.
Article in Aging cell, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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14 authors.
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Abstract
Mitochondrial quality control is severely impaired in the aging heart, largely attributed to disrupted mitophagy homeostasis. However, the key molecular drivers remain poorly defined, and the translational value of mitochondria-targeted therapy for cardiac aging is still underexplored. Here, we report prominent mitophagy flux congestion in aged cardiac tissue and confirm that mitochondrial transplantation efficiently rescues impaired mitophagy, ultimately rejuvenating the aging heart. Mechanistically, we identify a novel HIF-3α-BNIP3 signaling axis in the aging heart: HIF-3α, conventionally recognized as a transcriptional repressor, is aberrantly upregulated in senescent cardiomyocytes and directly regulates excessive BNIP3 expression to trigger mitophagy congestion. Notably, we establish an innovative translational strategy that mitochondrial transplantation restrains pathological overactivation of the HIF-3α-BNIP3 axis via improving intracellular ATP homeostasis, thereby reconstructing normal mitophagy flux and reversing cardiac aging. Our findings uncover an unrecognized upstream regulator of age-related mitophagy defects and provide a mitochondrial-based intervention approach for the treatment of aging-associated cardiac dysfunction.
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