Why some cancer-fighting immune cells lose their strength inside tumours

"Scientists have identified that the mitochondria in dendritic cells become debilitated within tumors, leading to a loss of their immune-activating capabilities. This discovery highlights the importance of mitochondrial health in maintaining effective immune responses against cancer."

"Injecting dendritic cells with robust mitochondria into cancerous mice resulted in a drastic slowdown of tumor growth, indicating that improving mitochondrial function could enhance the effectiveness of cancer immunotherapies."

"The metabolic signature of dendritic cells is critical in shaping the immune response. Healthy dendritic cells are essential for displaying protein fragments to cytotoxic T cells, which then target and destroy cancer cells."

Dendritic cells, essential for immune defense, lose effectiveness in tumors due to weakened mitochondria. Injecting robust mitochondria into these cells in mice significantly slowed tumor growth. This finding suggests that enhancing dendritic cell fitness could improve cancer immunotherapy outcomes. The metabolic state of dendritic cells is vital for determining the immune response. Healthy dendritic cells are necessary for presenting proteins to cytotoxic T cells, which are responsible for targeting and destroying cancer cells. The study emphasizes the importance of mitochondrial function in dendritic cell activity.

Read at Nature