An inflammatory bowel disease-linked lncRNA suppresses transcription factor T-BET expression in T cells to limit intestinal inflammation.

A conserved lncRNA, lnc15, linked to inflammatory bowel disease, suppresses T-BET in T cells and reduces intestinal inflammation, with deletion increasing colitis susceptibility.

• Why it matters: Understanding how noncoding genetic variants influence immune regulation is crucial for developing targeted therapies for IBD, yet few functional roles of lncRNAs are known.
• What they did: Researchers identified lnc15 within an IBD risk locus, showed its structure was destabilized by risk variants, and demonstrated its role in T cells through deletion and mechanistic studies involving T-BET suppression.
• The result: Loss of lnc15 led to increased inflammation and colitis in mice, highlighting its importance in immune regulation and suggesting it as a potential target for mucosal inflammation treatment.