Research on Mitochondrial transplantation to regulate T Cell exhaustion and enhance tumor immunotherapy

In recent years, emerging cancer immunotherapies have gradually entered clinical practice, offering more options for the field of tumor treatment due to their more durable efficacy and reduced toxicity. However, the treatment of solid tumors remains a significant challenge for these therapies. One of the key issues is that T cells within solid tumors often become exhausted due to prolonged exposure to tumor antigens and the complex immunosuppressive tumor microenvironment. The typical characteristics of exhausted T cells include loss of effector function, sustained high expression of inhibitory receptors, metabolic dysfunction, and abnormal accumulation of depolarized mitochondria with impaired function. As T cells are crucial immune cells for the efficacy of cancer immunotherapy, improving the exhausted state of T cells holds promise for restoring their function and enhancing antitumor immune treatment.Mitochondria (Mito), as the powerhouses of the cell, play a pivotal role in various cellular activities and are integral to the entire metabolic process of the cell. Based on this, the present study hypothesizes that transplanting healthy mitochondria into exhausted T cells could increase the proportion of functional mitochondria, thereby reconstructing the energy metabolism network within T cells and ultimately reversing their exhausted state to enhance the efficacy of antitumor immunotherapy.