Deoxysphingolipids activate cGAS-STING and enhance antitumor immunity.

Deoxysphingolipids activate cGAS-STING and suppress tumor growth in colon cancer models.

• Why it matters: Understanding how metabolic changes influence immune responses can reveal new cancer therapy strategies, especially through immune activation pathways like cGAS-STING.
• What they did: Researchers increased deoxySL levels in colon cancer cells by depleting serine and through genetic and dietary interventions in mice, then examined immune infiltration and tumor growth, supported by in vitro studies showing deoxySLs trigger cGAS-STING via mitochondrial DNA release.
• The result: Elevated deoxySLs promote immune cell infiltration and tumor suppression, suggesting a novel metabolic approach to enhance antitumor immunity through cGAS-STING activation.