What question did this study set out to answer?

This study investigates whether restoring mitophagy can rejuvenate aged hematopoietic stem cells and improve their function.

Targeted Restoration of Mitophagy Reinvigorates Aged Hematopoietic Stem Cells

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Randomized trial demonstrates improved function in aged hematopoietic stem cells, suggesting therapeutic potential for aging.

This study investigates whether restoring mitophagy can rejuvenate aged hematopoietic stem cells and improve their function.
Identified MCL-1 as a key mitophagy receptor in aged HSCs.
Administered UMI-77, a selective MCL-1 agonist, to evaluate effects on mitophagy and HSC function.
Used single-cell RNA sequencing and transplantation assays to assess changes in gene expression and regenerative capacity.
UMI-77 treatment enhanced mitophagy and improved mitochondrial parameters in aged HSCs.
Treatment resulted in better hematopoietic reconstitution capacity compared to control HSCs.
However, UMI-77 increased myeloid-biased CD150 high HSCs, indicating a persistent aging factor.

Liu et al. (2026) studied this question.

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