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Highly polymorphic products of both HLA-DR and HLA-DQ genes contribute to the polymorphism of the HLA-DR w13 haplotype

Identifieur interne : 000314 ( France/Analysis ); précédent : 000313; suivant : 000315

Highly polymorphic products of both HLA-DR and HLA-DQ genes contribute to the polymorphism of the HLA-DR w13 haplotype

Auteurs : J. Michon [France] ; Y. Henin [France] ; G. Sterkers [France] ; C. Freide [France] ; L. Gebuhrer [France] ; H. Betuel [France] ; J. Y. Muller [France] ; J. P. Levy [France]

Source :

RBID : ISTEX:370DECCB6626D497464185FF1C5AF117182ECCFA

English descriptors

Abstract

Abstract: We studied the polymorphisms of HLA-DR and HLA-DQ products from HLA-DRw13 haplotypes by analyzing the restriction of influenza A-specific cloned T cells from an HLA-DRw13,DQw1,Dw19 homozygous individual. The results show that (1) some functional epitopes, which can be borne by either HLA-DR or HLA-DQ molecules, are strictly correlated with the HLA-Dw19 subtype of HLA-DRw13. This clearly indicates that both HLA-DR and HLA-DQ products contribute to the HLA-Dw19 subdivision of HLA-DRw13. (2) At least two different restricting epitopes are borne by DR products: one is correlated with the HLA-DRwl3 serologically defined specificity, which includes Dw19 and Dw18 haplotypes; the other is correlated with the only HLA-Dw19 subtype of HLA-DRwl3. (3) Restricting epitopes borne by DQ molecules have been found on Dw19 cells only. (4) DQ-restricted clones were unable to react with DQwl APC of any other haplotypes tested, including DR1, DR2-long, DR2-short, and DRw14, demonstrating a high degree of functional polymorphism among the serologically defined DQw1 specificities.

Url:
DOI: 10.1007/BF00364746


Affiliations:


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ISTEX:370DECCB6626D497464185FF1C5AF117182ECCFA

Le document en format XML

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<div type="abstract" xml:lang="en">Abstract: We studied the polymorphisms of HLA-DR and HLA-DQ products from HLA-DRw13 haplotypes by analyzing the restriction of influenza A-specific cloned T cells from an HLA-DRw13,DQw1,Dw19 homozygous individual. The results show that (1) some functional epitopes, which can be borne by either HLA-DR or HLA-DQ molecules, are strictly correlated with the HLA-Dw19 subtype of HLA-DRw13. This clearly indicates that both HLA-DR and HLA-DQ products contribute to the HLA-Dw19 subdivision of HLA-DRw13. (2) At least two different restricting epitopes are borne by DR products: one is correlated with the HLA-DRwl3 serologically defined specificity, which includes Dw19 and Dw18 haplotypes; the other is correlated with the only HLA-Dw19 subtype of HLA-DRwl3. (3) Restricting epitopes borne by DQ molecules have been found on Dw19 cells only. (4) DQ-restricted clones were unable to react with DQwl APC of any other haplotypes tested, including DR1, DR2-long, DR2-short, and DRw14, demonstrating a high degree of functional polymorphism among the serologically defined DQw1 specificities.</div>
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