Inflammatorybowel disease (IBD) is a hard-to-cure disease that affects many adultsin the US.23 Chronic inflammation of theintestinal tract greatly affects the patient’s quality of life,and unfortunately, there is no drug available to treat the disease.24 Interleukin-22 (IL-22) is an important cytokinethat promotes the proliferation of epithelial cells and maintainsthe homeostasis of epithelial cells. The gene discussed is IL22; the disease is inflammatory bowel disease.