06/17/2026
A recent study found that a specific genetic marker, HLA-DRB1*01:03, was linked to more severe Crohn’s disease and ulcerative colitis. More research is needed, but findings like these help advance our understanding of why disease severity can vary from person to person.
HLA-DRB1*01:03 emerges as a genetic determinant of severe disease in both patients with Crohn's disease and patients with ulcerative colitis. Although further validation is needed, assessing HLA-DRB1*01:03 carriage might help identify patients who could benefit from more intensive monitoring or earl...