PMID- 25070808 OWN - NLM STAT- MEDLINE DCOM- 20150611 LR - 20151113 IS - 1468-1331 (Electronic) IS - 1351-5101 (Linking) VI - 22 IP - 1 DP - 2015 Jan TI - High frequency of DQB1*05 and absolute absence of DRB1*13 in muscle-specific tyrosine kinase positive myasthenia gravis. PG - 59-63 LID - 10.1111/ene.12525 [doi] AB - BACKGROUND AND PURPOSE: Myasthenia gravis (MG) is an autoimmune disease but certain genetic factors predispose its development. Since susceptibility to different forms of MG is linked to a number of allelic variants, the aim of this study was to explore the human leukocyte antigen (HLA) profile of our patients with muscle-specific tyrosine kinase (MuSK) MG. METHODS: Human leukocyte antigen (HLA) typing was performed in our cohort of 31 MuSK MG patients available for the study. The allele groups of DRB1* and DQB1* loci were typed with sequence-specific oligonucleotide probes and high resolution typing for DQB1* was performed using sequence-specific primers. HLA frequencies were compared with unrelated healthy bone marrow donors. RESULTS: Significant association of MuSK MG with alleles DRB1*14 [odds ratio (OR) 3.8], DRB1*16 (OR 3.3) (P < 0.01) and DQB1*05 (OR 2.2) (P < 0.05) was found. In our patients the most frequent DQB1* allele was DQB1*05:02. An absolute absence of DRB1*13 in our cohort of MuSK MG patients was also found, whilst this allele was present in 25% (495/1992) of control subjects (OR 0) (P < 0.01). The HLA DRB1*16-DQB1*05 (OR 2.9) haplotype was found to be associated with MuSK MG (P < 0.05). CONCLUSIONS: The strong association of MuSK MG with DQB1*05 alleles observed in patient series from other countries was confirmed. The novel finding in our cohort of MuSK MG patients was the absolute absence of DRB1*13 allele, which might have a protective role in the development of MuSK MG, at least in our population. CI - (c) 2014 EAN. FAU - Nikolic, A V AU - Nikolic AV AD - Neurology Clinic, Department for Neuromuscular Disorders, Clinical Center of Serbia, Belgrade, Serbia; Medical Faculty, University of Belgrade, Belgrade, Serbia. FAU - Andric, Z P AU - Andric ZP FAU - Simonovic, R B AU - Simonovic RB FAU - Rakocevic Stojanovic, V M AU - Rakocevic Stojanovic VM FAU - Basta, I Z AU - Basta IZ FAU - Bojic, S D AU - Bojic SD FAU - Lavrnic, D V AU - Lavrnic DV LA - eng PT - Journal Article DEP - 20140729 PL - England TA - Eur J Neurol JT - European journal of neurology JID - 9506311 RN - 0 (HLA-DQ beta-Chains) RN - 0 (HLA-DQB1 antigen) RN - 0 (HLA-DRB1 Chains) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Receptors, Cholinergic) RN - EC 2.7.10.1 (MUSK protein, human) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) SB - IM MH - Adult MH - Aged MH - Cohort Studies MH - Female MH - Gene Frequency MH - HLA-DQ beta-Chains/*genetics MH - HLA-DRB1 Chains/*genetics MH - Histocompatibility Antigens Class I/genetics MH - Humans MH - Male MH - Middle Aged MH - Myasthenia Gravis/*genetics/immunology MH - Receptor Protein-Tyrosine Kinases/*immunology MH - Receptors, Cholinergic/*immunology MH - Serbia MH - Young Adult OTO - NOTNLM OT - human leukocyte antigens OT - muscle-specific tyrosine kinase OT - myasthenia gravis EDAT- 2014/07/30 06:00 MHDA- 2015/06/13 06:00 CRDT- 2014/07/30 06:00 PHST- 2013/09/12 00:00 [received] PHST- 2014/06/09 00:00 [accepted] PHST- 2014/07/30 06:00 [entrez] PHST- 2014/07/30 06:00 [pubmed] PHST- 2015/06/13 06:00 [medline] AID - 10.1111/ene.12525 [doi] PST - ppublish SO - Eur J Neurol. 2015 Jan;22(1):59-63. doi: 10.1111/ene.12525. Epub 2014 Jul 29.