Innovative treatment of age-related hearing loss using MSCs and EVs with Apelin.

Utilizing single-cell transcriptome sequencing (scRNA-seq) technology, this study explores the viability of employing mesenchymal stem cells (MSCs) as a therapeutic approach for age-related hearing loss (ARHL). The research demonstrates MSCs' ability to differentiate into inner ear cell subpopulations, particularly hair cells, delivering Apelin via extracellular vesicles (EVs) to promote M2 macrophage polarization. In vitro experiments show reduced inflammation and preservation of hair cell health. In elderly mice, MSCs transplantation leads to hair cell regeneration, restoring auditory function. These findings highlight the regenerative capabilities of MSCs and EV-mediated therapeutic approaches for ARHL.