mRNA levels of AhR were previously reported to decrease in CD patients, but not in UC patients.[51] Therefore, the levels of AhR in IBD patients need to be further studied while taking into account several factors such as cell specificity, active/inactive disease in tissue evaluated, types of treatments given to patients that might impact AhR expression, and other important demographic information (e.g., sex, age). The gene discussed is AHR; the disease is inflammatory bowel disease.