What question did this study set out to answer?

This research aims to elucidate how mitochondrial function affects dendritic cell behavior in the tumor environment.

April 4, 2026

Mitochondrial metabolism and signaling direct dendritic cell function in antitumor immunity

Puntos clave

This research aims to elucidate how mitochondrial function affects dendritic cell behavior in the tumor environment.
Analyzed mitochondrial states in intratumoral dendritic cells
Investigated the role of OPA1 in energy metabolism
Examined the relationship between OPA1 and NRF1 expression
Tested immunotherapeutic efficacy of polarized dendritic cells in mice
Intratumoral dendritic cells exhibited unique mitochondrial states
OPA1 influences antigen presentation and T cell activation
Mitochondrial functions declined during tumor progression
Polarized dendritic cells improved immunotherapy outcomes when combined with checkpoint blockade

Resumen

Antitumor immunity requires conventional type 1 dendritic cells (cDC1s). How cDC1s maintain functional fitness in the tumor microenvironment remains unclear. In this study, we established that intratumoral cDC1s exhibited discrete mitochondrial states and that OPA1-mediated mitochondrial energy and redox metabolism dictated cDC1 antitumor responses. Mechanistically, OPA1 orchestrated antigen presentation and the CD8 + T cell priming function of cDC1s by promoting nuclear respiratory factor 1 (NRF1) expression and electron transport chain integrity, thereby supporting bioenergetics and NAD + /NADH balance. During tumor progression, mitochondrial membrane potential and volume, as well as OPA1-NRF1 signaling, declined in intratumoral cDC1s. Furthermore, intratumoral administration of cDC1s with polarized mitochondria showed immunotherapeutic benefits in mice, particularly in combination with immune checkpoint blockade. Collectively, our findings reveal mitochondrial metabolism and signaling as putative targets to reinvigorate cDC1 function for cancer immunotherapy.

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