EVs decreased NF-κB levels and mRNA levels of TNFα, IL-1α, IL-1β and IL-2, and increased mRNA levels of TGFβ and IL-10 in LPS-induced inflammation in human intestinal epithelial cells (HT-29) and reduce inflammation symptoms of dextran sulfate sodium-induced colitis in mice. The gene discussed is IL1B; the disease is colitis.