Engineered Mitochondrial Transplantation as An Anti-Aging Therapy

Aging is an inevitable and complex biological process involving multi-factorial mechanisms. Mitochondrial dysfunction is a critical factor in the aging process, characterized by a decline in mitochondrial quality and activity, leading to aging and aging-related diseases. Therefore, mitochondria have become an attractive target in anti-aging therapies. Several senolytic drugs targeting mitochondria and antioxidant agents have been used in antiaging research in the past few years. However, these strategies may cause adverse effects with long-term medication. In this extensive review, we propose "mitochondrial transplantation," which transfers healthy mitochondria from donor cells to recipient cells to replace damaged or dysfunctional mitochondria, as a new alternative strategy for treating mitochondrial dysfunction and aging-associated diseases. In this review, we introduce the contemporary landscape of mitochondrial transplantation, then discuss intensely the successful applications of mitochondrial transplantation therapy in aging diseases such as neurodegenerative diseases, cardiovascular aging, and reproductive aging, highlighting its translational potential. Finally, we summarize and prospect the challenges and opportunities mitochondrial transplantation faces in anti-aging therapy.