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  • Title: [Significance of confirmatory testing of HLA system in unrelated haematopoietic stem cell donors].
    Author: Dobrovolná M, Vraná M, Brdicka R, Loudová M.
    Journal: Cas Lek Cesk; 2006; 145(1):32-5. PubMed ID: 16468239.
    Abstract:
    BACKGROUND: Haematopoietic stem cell transplantation is a standard curative therapy for some acquired haematological diseases and inherited metabolic and immunological disorders. The HLA compatibility in five loci (HLA class I -A, -B and -C and HLA class II -DRB1 and -DQB 1) of the donor/recipient pair is a prerequisite for the success of haematopoietic stem cell transplantation which represents a process of adoption donors immunity. METHODS AND RESULTS: HLA is the most polymorphic system in the human genome and this polymorphism is exactly detected by molecular genetics methods on DNA level only. In period of 2001-2004 we performed confirmatory testing of 366 unrelated haematopoietic stem cells donors from Czech and foreign registers for 256 patients. Only 16% of the donors completely matched the patients in all HLA loci. We detected HLA mismatches in the samples of 81% patient/donor pairs but these results were consonant with previous results from registers. 3% of confirmatory samples were discrepant with previous registry data. CONCLUSIONS: Despite of increasing number of available unrelated haematopoietic stem cell donors and the quality of registry HLA typing the possibility of finding the completely match donor is still limited.
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