engleski

HLA allele and haplotype polymorphisms among Croatian patients in an unrelated hematopoietic stem cell donor search program

Aim of the present study was to investigate HLA alleles and haplotypes among Croatian patients in unrelated HSCT program, and to analyze HLA matching in patient/donor pairs. Analysis was performed on a group of 105 patients and their donors, as control served 4000 unrelated donors from our Registry (CBMDR). PCR-SSO and PCR-SSP high-resolution methods for HLA-A, -B, -C, - DRB1, and -DQB1 loci were used for typing patient/donor pairs. Donors from CBMDR were tested for HLA-A, -B, -DRB1 by PCR-SSO. No difference was observed in frequency at HLA tested loci among patients and donors from CBMDR. Fully matched donor (10/10) was found for 68 (64.8%) patients, the highest number of mismatches was found for HLA-DRB1 and HLA-C alleles. The presence of HLA-B alleles (B*15:01, B*18:01, and B*51:01) associated with two or more HLA-C alleles as well as the presence of unusual HLA-B/HLA-C (B*35:01- C*07:01 and B*35:01-C*07:02) combinations resulted in mismatches at HLA-C locus. Additionally, mismatches at DRB1 locus were in most cases found for DRB1*11 alleles. The results suggest that the DRB1*11:04 allele might be considered as a limiting factor in finding a 10/10 matched donor. These data may help in the improvement of the searching protocol for unrelated donors for Croatian patients.

Unrelated HSCT ; HLA ; Matching donor ; Searching protocol ; DRB1*11

nije evidentirano