This study investigated the function of lnc15 (2310015A10Rik), a conserved lncRNA encoded at an IBD risk locus, using lnc15-knockout mice to assess its role in intestinal immune regulation and susceptibility to experimental colitis.
Deletion of lnc15 in mice caused baseline inflammatory gene signatures and increased susceptibility to experimental colitis. Mechanistically, lnc15 suppressed T-BET (encoded by *Tbx21*) by recruiting the CCR4-NOT mRNA degradation complex to *Tbx21* mRNA — simultaneously boosting Treg suppressive function and reducing conventional T cell pathogenicity. IBD risk variants destabilize lnc15 structure, leading to its degradation.
Findings are primarily from mouse knockout models; direct functional validation in human T cells is not described in the abstract. The full-text is not available, so complete mechanistic and clinical details cannot be confirmed. Translational relevance to human IBD patients remains to be established.
While not immediately actionable clinically, lnc15 and the CCR4-NOT/T-BET axis represent potential therapeutic targets for IBD — especially for patients carrying risk variants that destabilize lnc15. Clinicians should watch for future studies validating this pathway in human tissue.
