PMID- 10758418 OWN - NLM STAT- MEDLINE DCOM- 20000606 LR - 20211203 IS - 0835-7900 (Print) IS - 0835-7900 (Linking) VI - 14 IP - 3 DP - 2000 Mar TI - Inflammatory bowel disease: progress toward a gene. PG - 207-18 AB - The pathogenesis of ulcerative colitis (UC) and Crohn's disease (CD) is still unknown, but the importance of genetic susceptibility has been clearly shown by epidemiological data from family and twin studies. Linkage studies have identified two susceptibility loci for inflammatory bowel disease (IBD) on chromosomes 12 and 16. Importantly, these linkages have been replicated by independent investigators, and studies of positional candidates within these regions continue, together with fine mapping strategies. Regions of 'suggestive' linkage on chromosomes 1, 3, 4, 6, 7, 10, 22 and X have also been reported in individual studies. Other important candidate genes investigated include the interleukin-1 receptor antagonist, MUC3 and genes of the human leukocyte antigen (HLA) system. The apparently conflicting data in different studies from around the world may be explained by ethnic differences, case mix and genetic heterogeneity. Replicated class II HLA associations include HLA DRB1*0103 and DR2 (DRB1*1502), involved in UC susceptibility, and HLA DRB1*03 and DR4 as resistance alleles for CD and UC respectively. Animal studies have provided insights from targeted mutations and quantitative trait locus analysis. The goals of continuing research include narrowing the regions of linkages and analysis of candidate genes, and possibly the application of newly developed methods using single nucleotide polymorphisms. Advances in IBD genetics hold the potential to provide knowledge about the disease pathogenesis at the molecular level, with ensuing benefits for clinical practice. FAU - van Heel, D A AU - van Heel DA AD - Wellcome Trust Centre for Human Genetics, University of Oxford, United Kingdom. vanheel@well.ox.ac.uk FAU - Satsangi, J AU - Satsangi J FAU - Carey, A H AU - Carey AH FAU - Jewell, D P AU - Jewell DP LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - Canada TA - Can J Gastroenterol JT - Canadian journal of gastroenterology = Journal canadien de gastroenterologie JID - 8807867 RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Animals MH - Chromosomes, Human, Pair 12 MH - Chromosomes, Human, Pair 16 MH - Cluster Analysis MH - Colitis, Ulcerative/*genetics MH - Crohn Disease/*genetics MH - Ethnicity/genetics MH - Genetic Linkage MH - Genetic Predisposition to Disease MH - HLA Antigens/genetics MH - Histocompatibility Antigens Class II/genetics MH - Humans MH - Polymorphism, Genetic MH - Twin Studies as Topic RF - 144 EDAT- 2000/04/12 09:00 MHDA- 2000/06/10 09:00 CRDT- 2000/04/12 09:00 PHST- 2000/04/12 09:00 [pubmed] PHST- 2000/06/10 09:00 [medline] PHST- 2000/04/12 09:00 [entrez] AID - 10.1155/2000/361309 [doi] PST - ppublish SO - Can J Gastroenterol. 2000 Mar;14(3):207-18. doi: 10.1155/2000/361309.