The precise mechanism by which gut microbiota influence the immunotherapy response of tumors in anatomically distant locations remains debated. In this study, using organoids and animal models, Zhang and colleagues show that Bifidobacterium-derived extracellular vesicles synergize the anti-tumor effect of anti-PD-1 via modulation of key cytokines, immune response and oncogenic pathways, and increase in tumor-infiltrating CD8 + T cells.
- Ranjan Preet
- Md Atiqul Islam
- Jun Zhang
