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.
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Abbreviations
- APC:
-
antigen-presenting cells
- cpm:
-
count per minute
- HAU:
-
hemagglutinin units
- IL-2:
-
interleukin 2
- MHC:
-
major histocompatibility complex
- mAb:
-
monoclonal antibody
- PBM:
-
peripheral blood mononuclear cells
- PHA:
-
phytohemagglutinin
- pl:
-
isoelectric point
- PMA:
-
phorbol myristic acetate
- SD:
-
standard deviation
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Michon, J., Henin, Y., Sterkers, G. et al. Highly polymorphic products of both HLA-DR and HLA-DQ genes contribute to the polymorphism of the HLA-DR w13 haplotype. Immunogenetics 24, 177–183 (1986). https://doi.org/10.1007/BF00364746
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DOI: https://doi.org/10.1007/BF00364746