Palmitate puts ACLY in shape to reprogram macrophages.

Palmitate-induced ACLY palmitoylation stabilizes nuclear tetramers, boosting acetyl CoA and driving pro-inflammatory macrophage activity, impacting tumor environments.

• Why it matters: Understanding how metabolic modifications influence macrophage behavior is crucial for developing therapies against cancer and inflammatory diseases, yet the specific mechanisms remain unclear.
• What they did: The study examined the effect of palmitate on ATP citrate lyase (ACLY) in macrophages, demonstrating that palmitate promotes ACLY palmitoylation, stabilizes its tetramers, and enhances acetyl CoA production.
• The result: This pathway reprograms macrophages toward a pro-inflammatory state and can be exploited via SCD1 targeting and palmitate supplementation to remodel tumor microenvironments and suppress hepatocellular carcinoma growth.