摘要
Inflammatory Bowel Disease （IBD） is a dysregulated response of the im- mune system associated with intestinal tissues to the commensal microbiota in a genetically susceptible host. The understanding of the genetic basis of IBD has been significantly expanded with the advent of genome-wide association studies （GWAS） which has resulted in the identification of more than 30 loci that are associated with Crohn＇s disease （CD） and ulcerative colitis （UC）.
