[Studies on double-labelling method for determination of T lymphocyte subpopulations].

In order to determine the concurrent expression of DR and CD antigen of T lymphocyte surface markers, the fluorescence-rosette double-labelling technique was developed by employing monoclonal antibody against HLA-DR and sensitized sheep erythrocytes with OKT series of monoclonal antibodies against cell surface antigen. Its reliability was evaluated by comparison with two-step isolating technique for determining DR antigen of activated T lymphocyte subsets in 30 healthy volunteers. The result showed there was no statistic difference between results determined with two methods. The double-labelling technique was characterized by its samplity, no injury for cellular activity and ability for analysing the expression of the single antigen and double antigens on cell surface concurrently.