Abstract：
:This study describes the diversity of DRw6 and DR5 haplotypes in the American black population using serology, cellular typing, and restriction fragment length polymorphism (RFLP) analysis. DRw6 (DRw13 and DRw14) and DR5 (DRw11 and DRw12) haplotypes are observed at a high frequency in this population (DRw6: 32%, DR5: 30%). Many of these haplotypes express undefined HLA-D specificities and unusual DQ and DRw52 associations which previously have not been well characterized or reported (e.g., DRw13, DQw5, DRw52c, D-; DRw13, DQw2, DRw52a, D-; DRw11, DQw5, DRw52c, D-). Serologic analysis of class II alleles in American blacks suggests the presence of DRw13, DRw11 and DQw6 allelic variants and demonstrates the difficulty in defining DRw6 and DR5 in this population. The class II genes from four American black families expressing many of the novel DRw13, DRw14, DRw11, and DRw12 haplotypes defined by serology and mixed leukocyte culture were further characterized by RFLP analysis. The data presented here along with other published data identify at least eight DRw13 haplotypes (DRw13A-DRw13H) in the human population. Five of these haplotypes exhibit an undefined HLA-D specificity. Three DRw14 haplotypes (DRw14A-DRw14C) and eight DR5 haplotypes (DRw11A-DRw11E and DRw12A-DRw12C) were also identified. The novel DRw6 and DR5 haplotypes observed in American blacks may arise from differences in DRB1, DQA1, and DQB1 genes as well as from differences in the combinations of alleles of these genes encoded by a haplotype. The serologic and RFLP analyses suggest that some DRw13 and DRw11 haplotypes represent transitional steps between DRw13 and DRw11 in the evolutionary pathway which generated the DRw52 family.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Lee KW,Hurley CK,Hartzman R,Johnson AHdoi
10.1016/0198-8859(90)90115-6subject
Has Abstractpub_date
1990-11-01 00:00:00pages
202-19issue
3eissn
0198-8859issn
1879-1166pii
0198-8859(90)90115-6journal_volume
29pub_type
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