title: Susceptibility to multiple sclerosis associated with an immunoglobulin gamma 3 restriction fragment length polymorphism.
abstract: Susceptibility to multiple sclerosis (MS) has been linked to the immunoglobulin G (Gm) markers as well as HLA-DR genes. We have used a genomic Ig gamma 1 probe which detects polymorphisms in the gamma 1, gamma 2, gamma 3 and pseudogamma genes to identify restriction fragment length polymorphisms associated with MS. A negative association was found between a 5.9-kilobase (kb) Bst EII gamma 3 fragment and MS. Southern blot analysis of genomic DNA revealed the presence of this fragment in 84 of 140 (60.0%) controls, but in only 17 of 59 (28.8%) MS patients. The frequency of the fragment in 47 myasthenia gravis and 16 Graves' disease patients was similar to that in controls, 60.0 and 62.5%, respectively.
mesh_terms: D005787:Gene Frequency; D008040:Genetic Linkage; D006801:Humans; D007126:Immunoglobulin Allotypes / Q000235:genetics; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007142:Immunoglobulin gamma-Chains / Q000235:genetics*; D009103:Multiple Sclerosis / Q000235:genetics* / Q000276:immunology; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D007126:Immunoglobulin Allotypes; D007143:Immunoglobulin Heavy Chains; D007142:Immunoglobulin gamma-Chains