Deoxysphingolipids activate cGAS-STING and enhance antitumor immunity.

Deoxysphingolipids activate cGAS-STING pathway, boosting antitumor immunity and reducing colon tumor growth in mice.

• Why it matters: Understanding how metabolic changes influence immune responses can reveal new strategies for cancer therapy, especially by targeting tumor metabolism to enhance immune activation.
• What they did: Researchers increased deoxySL levels in colon cancer cells through serine depletion, genetic mutation, and diet, then examined immune infiltration and tumor growth, alongside in vitro studies of cGAS-STING activation.
• The result: Elevated deoxySLs triggered mitochondrial DNA release, activating cGAS-STING and promoting immune-mediated tumor suppression, suggesting deoxySLs as a novel metabolic approach for cancer treatment.