Glutamine metabolism keeps pathogenic hepatic CD4(+) T cells in check.

Glutamine metabolism via glutaminolysis suppresses inflammatory cytokine production in hepatic CD4(+) T cells during MASLD, reducing liver injury.

• Why it matters: Understanding how immune cell metabolism influences inflammation is crucial for developing targeted therapies for steatohepatitis, yet the specific metabolic checkpoints remain unclear.
• What they did: The study examined hepatic CD4(+) T cells in MASLD, demonstrating that glutamine metabolism limits O-GlcNAcylation and cytokine production, with glutamine supplementation restoring tissue glutamine levels.
• The result: Findings reveal a tissue-specific metabolic checkpoint that controls T cell-driven inflammation, suggesting glutamine supplementation as a potential strategy to mitigate liver damage in steatohepatitis.