Zbtb44-mediated transcriptional repression critically regulates colonic inflammation.

Genetic deletion of Zbtb44 causes spontaneous colitis and rectal prolapse in mice, with Zbtb44 -/- T cells showing increased IFN-γ expression.

• Why it matters: Understanding the mechanisms that regulate colonic immune homeostasis is crucial for developing treatments for inflammatory bowel disease. The role of Zbtb44 in this process was previously uncharacterized, leaving a gap in knowledge about transcriptional regulation of colonic inflammation.
• What they did: Researchers used genetic deletion of Zbtb44 in mice and examined T cell cytokine expression, revealing increased IFN-γ levels. They also identified that Zbtb44 undergoes SUMOylation, which promotes its interaction with T-bet, allowing it to bind to the IFN-γ promoter and enhancer to suppress cytokine production.
• The result: Findings demonstrate Zbtb44 as a key regulator of colonic inflammation, suggesting that targeting its pathway could offer therapeutic potential for inflammatory bowel disease.