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HLA-DPB1 gene polymorphism and multiple sclerosis: a large case-control study in the southwest of France
Authors:Marie-Paule Roth  Hlne Coppin  Patrick Descoins  Jean-Bernard Ruidavets  Anne Cambon-Thomsen  Michel Clanet
Institution:Centre de Recherche sur le Polymorphisme Génétique des Populations Humaines, CNRS UPR 8291, CHU Purpan, Toulouse, France.
Abstract:The polymorphism at the HLA-DPB1 locus has been characterized in a large number of patients with multiple sclerosis (n = 112) and in healthy controls (n = 115). Both patients and controls lived in the southwest of France (in the Pyrénées Atlantiques) and had similar ethnic background. The typing procedure involved the selective amplification of the second exon of the DPB1 locus by polymerase chain reaction, followed by hybridization of the amplified DNA with 14 sequence-specific oligonucleotide probes. Individual alleles were identified by the pattern of hybridization of the different probes. The distribution of the DPB1 alleles was not significantly different in multiple sclerosis patients and controls (p = 0.11). This does not corroborate the reported association of multiple sclerosis with the primed lymphocyte typing (PLT)-defined DPw4 specificity and is not in favour of a role played by polymorphic residues of the DP molecule in susceptibility to multiple sclerosis.
Keywords:Multiple sclerosis  HLA-DP  Gene polymorphism  Oligonucleotide typing
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