title: [Determination of HLA antigens in serum and thrombocytes using microneutralization and microabsorption tests].
abstract: The microneutralization and microabsorption test is described for identifying HLA-antigens in the serum and on thrombocytes. The incubation time for neutralization and absorption amounts to 3 hours at 20-25 degrees C. Absorption is made by platelet suspension at a concentration of 300 000 to 500,000 thrombocytes per mm3. In the majority of cases satisfactory results can be achieved by a neutralizing ratio (absorption ratio) of 1: 1. Some HLA sera show a deviating ability of neutralization with those HLA-antigens contained in sera and absorption with appropriate platelets; this behaviour is not connected with the titre of HLA-cytotoxins. Depending on the case there will be a varying content of HLA-antigens in sera and on thrombocytes of individuals. Moreover there is no regular conformity concerning the content of HLA-antigens in the serum and on the thrombocytes of a single person.
mesh_terms: D001792:Blood Platelets / Q000276:immunology*; D006680:HLA Antigens / Q000032:analysis*; D006801:Humans; D007158:Immunologic Techniques; D009500:Neutralization Tests / Q000379:methods*
chemical_list: D006680:HLA Antigens
vernacular_title: Nachweis von HLA-Antigenen im Serum und an Thrombozyten mit Hilfe des Mikroneutralisations- und Mikroabsorptionstests.