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Published January 1, 2016 | Version v1
Journal article Open

Genetic heterogeneity within the HLA region in three distinct clinical subgroups of myasthenia gravis

Creators

  • 1. Istanbul Univ, Istanbul Fac Med, Dept Physiol, Istanbul, Turkey
  • 2. Istanbul Univ, Istanbul Fac Med, Dept Neurol, Istanbul, Turkey
  • 3. Oklahoma Med Res Fdn, Arthrit & Clin Immunol, 825 NE 13th St, Oklahoma City, OK 73104 USA
  • 4. Bakirkoy Res & Training Hosp Psychiat & Neurol Di, Dept Neurol, Istanbul, Turkey
  • 5. Istanbul Univ, Cerrahpasa Med Fac, Dept Neurol, Istanbul, Turkey
  • 6. Istanbul Univ, Istanbul Fac Med, Dept Pathol, Istanbul, Turkey
  • 7. Heidelberg Univ, Univ Med Ctr Mannheim, Inst Pathol, Mannheim, Germany
  • 8. Univ Michigan, Dept Internal Med, Div Rheumatol, Ann Arbor, MI 48109 USA

Description

This study aims to investigate genetic susceptibility to early-onset and late-onset anti-acetylcholine receptor antibody positive myasthenia gravis (EOMG and LOMG) and anti-muscle specific kinase antibody positive MG (MuSK-MG) at genome-wide level in a single population. Using a custom-designed array and imputing additional variants and the classical HLA alleles in 398 patients, we detected distinct associations. In EOMG, rs113519545 in the HLA class I region (OR = 5.71 [3.77-8.66], P = 2.24 x 10(-16)), HLA-B*08:01 (OR = 7.04 [3.95-12.52], P = 3.34 x 10(-11)) and HLA-C*07:01 (OR = 2.74 [1.97-3.81], P = 2.07(-9)), in LOMG, rs111256513 in the HLA class II region (OR = 2.22 [1.59-3.09], P = 2.48 x 10(-6)) and in MuSK-MG, an intronic variant within HLA-DQB1 (rs68081734, OR = 5.86, P = 2.25 x 10(-14)) and HIA-DQB1*05:02 (OR = 8.56, P = 6.88 x 10(-13)) revealed the most significant associations for genome-wide significance. Differential genetic susceptibility within the HLA to EOMG, LOMG and MuSK-MG has been established in a population from Turkey. (C) 2016 Elsevier Inc. All rights reserved.

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