Studies of the HLA--D determinants in the Hungarian population.

A Hungarian random population sample was tested for six well-known and two new HLA--D specificities. HLA--D antigen and gene frequencies in the studied population agree with the frequencies observed in pooled random Caucasians, only HLA--Dw3 being significantly elevated. The incidences of Dw1 and Dw4 are, however, lower while the incidences of the Dw5 and Dw6 alleles seem to be higher in our population sample without reaching statistical significance. As for the two new specificities, the IVAD-1 specificity has a low frequency, while IVAD-3 occurs quite frequently. HLA--B and HLA--D associations seem to be different in our population sample as compared to others. In spite of the high incidence of the HLA--Bw35 antigen, no HLA--D association was found. The two new HLA--D specificities did not show association with any of the established HLA--B antigens.