Low-protein diet enhances antitumor immunity in pancreatic cancer through microbiota-derived UDP-galactose.

Low-protein diet boosts antitumor immunity in pancreatic cancer by increasing microbiota-derived UDP-galactose, reducing tumor progression in mice.

• Why it matters: Pancreatic ductal adenocarcinoma (PDAC) has limited treatment options, and understanding how diet influences immune responses could lead to new therapies.
• What they did: Researchers implemented a low-protein diet in male mice with PDAC, analyzed gut microbiota changes, and identified Blautia coccoides as a key producer of UDP-galactose that activates immune pathways.
• The result: The diet-induced microbiota changes enhanced immune activation and tumor suppression, and combining dietary or microbial interventions with anti-PD1 therapy improved survival, suggesting a new dietary approach to boost immunotherapy efficacy.