PMID- 19819281 OWN - NLM STAT- MEDLINE DCOM- 20100121 LR - 20221207 IS - 1879-1166 (Electronic) IS - 0198-8859 (Linking) VI - 71 IP - 1 DP - 2010 Jan TI - Association of human leukocyte antigen class II alleles with response to immunosuppressive therapy in Korean aplastic anemia patients. PG - 88-92 LID - 10.1016/j.humimm.2009.10.002 [doi] AB - HLA-DR15 (DR2) is overrepresented in aplastic anemia (AA) patients, and its presence is associated with a better response to cyclosporine-based immunosuppressive therapy (IST). However, little is known about other human leukocyte antigen (HLA) alleles affecting therapy response. We investigated 37 Korean patients with severe AA for the association of HLA class II alleles with response to IST: cyclosporine A combined with antithymocyte globulin or antilymphocyte globulin. Molecular or serologic typing of HLA-DR and HLA-DQ alleles was performed. In responders (13/37, 35.1%), the frequency of HLA-DR15 was increased (69.2% vs 8.3%, p = 0.0002) and that of DR4 was decreased (7.7% vs 66.7%, p = 0.0007) compared with nonresponders. The response rate was significantly higher in DR15(+) than in DR15(-) (81.8% vs 15.4%, p = 0.0002) and in DR4(-) than in DR4(+) patients (60.0% vs 5.9%, p = 0.0007). The response rates in the best (DR15(+)/DR4(-)), intermediate, and poor response groups (DR15(-)/DR4(+)) were 88.9, 38.5, and 0%, respectively (p = 0.00001). At the allelic level, DRB1*1501 and closely linked DQB1*0602 were associated with a good response and DRB1*0405 and closely linked DQB1*0401 with a poor response to IST. HLA-DR typing may be useful for predicting a response to IST in AA patients. FAU - Song, Eun Young AU - Song EY AD - Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea. FAU - Kang, Hyoung Jin AU - Kang HJ FAU - Shin, Hee Young AU - Shin HY FAU - Ahn, Hyo Seop AU - Ahn HS FAU - Kim, Inho AU - Kim I FAU - Yoon, Sung-Soo AU - Yoon SS FAU - Park, Seonyang AU - Park S FAU - Kim, Byoung Kook AU - Kim BK FAU - Park, Myoung Hee AU - Park MH LA - eng PT - Journal Article PL - United States TA - Hum Immunol JT - Human immunology JID - 8010936 RN - 0 (Antilymphocyte Serum) RN - 0 (HLA-D Antigens) RN - 0 (Immunosuppressive Agents) RN - 83HN0GTJ6D (Cyclosporine) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Alleles MH - Anemia, Aplastic/drug therapy/*genetics/*immunology MH - Antilymphocyte Serum/therapeutic use MH - Asian People/*genetics MH - Child MH - Child, Preschool MH - Cyclosporine/therapeutic use MH - Female MH - HLA-D Antigens/*genetics/immunology MH - Humans MH - Immunosuppressive Agents/*therapeutic use MH - Male MH - Middle Aged MH - Young Adult EDAT- 2009/10/13 06:00 MHDA- 2010/01/22 06:00 CRDT- 2009/10/13 06:00 PHST- 2009/04/21 00:00 [received] PHST- 2009/09/11 00:00 [revised] PHST- 2009/10/02 00:00 [accepted] PHST- 2009/10/13 06:00 [entrez] PHST- 2009/10/13 06:00 [pubmed] PHST- 2010/01/22 06:00 [medline] AID - S0198-8859(09)00609-0 [pii] AID - 10.1016/j.humimm.2009.10.002 [doi] PST - ppublish SO - Hum Immunol. 2010 Jan;71(1):88-92. doi: 10.1016/j.humimm.2009.10.002.