HLA-DPB1 allele mismatches between unrelated HLA-A,B,C,DR (generic) DQA1-identical unrelated individuals with unreactive MLC.
We have used a PCR-RFLP method with one generic amplification of HLA-DPB1 second exon and 6 endonucleases to differentiate the 19 HLA-DPB1 alleles and 171 heterozygous combinations. The set of primers used in our studies produced fragment sizes different from those published before (1). The HLA-DPB1 alleles in Caucasians showed a higher frequency of DPB1*0401 and DPB1*0402, when compared to a small group of Colombians who showed a higher frequency of DPB1*0402 and DPB1*0201. We found three HLA-DPB1 alleles associated with two HLA haplotypes that result from non-random association of alleles: DPB1*0401 with HLA-A26, B38, DR4, DQA1*0301 and DPB1*0101 and DPB1*0401 with HLA-A1, B8, DR3, DQA1*0501. We also report that 70% of combinations between HLA (generic A,B,C,DR) and DQA1-identical MLC-unreactive cell mixtures showed HLA-DPB1 mismatches, suggesting that HLA-DPB1 differences are not important in MLC reactivity.
Salazar
M
M
Dana Farber Cancer Institute, Boston, Mass.
Yunis
I
I
Alosco
S M
SM
Chopek
M
M
Yunis
E J
EJ
D000483:Alleles; D005802:Genes, MHC Class II; D006682:HLA-DP Antigens / Q000235:genetics*; D059868:HLA-DP beta-Chains; D006239:Haplotypes; D006801:Humans; D007199:Indians, South American / Q000235:genetics; D007959:Lymphocyte Culture Test, Mixed; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D044465:White People / Q000235:genetics
D006682:HLA-DP Antigens; D059868:HLA-DP beta-Chains; C071170:HLA-DPB1 antigen