Histocompatibility in Transplantation
•Complete tissue compatibility:
•UOnly if between identical twins
•UHave same histocompatibility (HLA) antigens
•Graft rejection occurs:
•Ubecause of foreign HLA antigens
•Uthe greater the mismatch of HLA antigens the higher the risk of rejection
•Pre-transplantation testing:
•UTissue typing:
•UCrossmatch:
•UHLA antibody screening/identification:
•eidentification of HLA class I and HLA class II antigens
•edetects the presence of antibodies (anti-HLA) in patient that react with HLA antigens of donor
•edetects the presence of antibodies (anti-HLA) in patient and identifies the type of antibody.