PMID- 30626832 OWN - NLM STAT- MEDLINE DCOM- 20190708 LR - 20200225 IS - 1349-7235 (Electronic) IS - 0918-2918 (Print) IS - 0918-2918 (Linking) VI - 58 IP - 9 DP - 2019 May 1 TI - Clinical and Genetic Aspects of Behcet's Disease in Japan. PG - 1199-1207 LID - 10.2169/internalmedicine.2035-18 [doi] AB - Patients with Behcet's disease (BD) suffer from episodic ocular and mucocutaneous attacks, resulting in a reduced quality of life. The phenotype of Japanese BD has been changing over the past 20 years, and the rate of human leukocyte antigen (HLA)-B*51-positive complete type is decreasing while that of intestinal type is increasing. This phenotypical evolution may be related to changes in as-yet-unknown environmental factors, as the immigration influx in Japan is low. Mechanisms discovered by genome-wide association studies include ERAP1-mediated HLA class I antigen bounding pathway, autoinflammation, Th17 cells, natural killer cells, and polarized macrophages, a similar genetic architecture to Crohn's disease, ankylosing spondylitis, and psoriasis. As for treatments, management guidelines have been implemented, and the development of tumor necrosis factor (TNF) inhibitors is markedly improving the outcome of BD, but evidence supporting treatment for special-type BD is limited. The classification of BD into distinct clusters based on clinical manifestations and genetic factors is crucial to the development of optimized medicine. FAU - Kirino, Yohei AU - Kirino Y AD - Department of Stem Cell and Immune Regulation, Yokohama City University, Graduate School of Medicine, Japan. FAU - Nakajima, Hideaki AU - Nakajima H AD - Department of Stem Cell and Immune Regulation, Yokohama City University, Graduate School of Medicine, Japan. LA - eng PT - Journal Article PT - Review DEP - 20190110 PL - Japan TA - Intern Med JT - Internal medicine (Tokyo, Japan) JID - 9204241 RN - 0 (Immunosuppressive Agents) RN - 0 (Minor Histocompatibility Antigens) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 3.4.11.- (Aminopeptidases) RN - EC 3.4.11.- (ERAP1 protein, human) SB - IM MH - Aminopeptidases/metabolism MH - Behcet Syndrome/diagnosis/drug therapy/epidemiology/*genetics MH - Genetic Predisposition to Disease MH - Genome-Wide Association Study MH - Humans MH - Immunosuppressive Agents/therapeutic use MH - Japan/epidemiology MH - Killer Cells, Natural/immunology MH - Minor Histocompatibility Antigens/metabolism MH - Phenotype MH - Quality of Life MH - Risk Factors MH - Tumor Necrosis Factor-alpha/antagonists & inhibitors PMC - PMC6543215 OTO - NOTNLM OT - Behcet's disease OT - ERAP1 OT - GWAS OT - HLA OT - environmental factors OT - genetics COIS- The authors state that they have no Conflict of Interest (COI). EDAT- 2019/01/11 06:00 MHDA- 2019/07/10 06:00 PMCR- 2019/05/01 CRDT- 2019/01/11 06:00 PHST- 2019/01/11 06:00 [pubmed] PHST- 2019/07/10 06:00 [medline] PHST- 2019/01/11 06:00 [entrez] PHST- 2019/05/01 00:00 [pmc-release] AID - 10.2169/internalmedicine.2035-18 [doi] PST - ppublish SO - Intern Med. 2019 May 1;58(9):1199-1207. doi: 10.2169/internalmedicine.2035-18. Epub 2019 Jan 10.