Two-colour flow cytometry study of lymphocyte subpopulations in patients with primary immunodeficiencies.

Immunofluorescent flow cytometric examination of one hundred and eighty-five children with different primary immunodeficiency syndromes and sixty-nine control patients revealed twenty-six cases with a bimodal distribution of antigens CD5 and CD7. Such abnormalities were most frequently found in patients with total antibody deficiency, namely those with common variable hypogammaglobulinaemia (10/24 patients) and congenital agammaglobulinaemia with lack of B cells (10/40), but were never seen in normal controls. Two-colour flow immunofluorescence demonstrated that antigen CD4 was expressed only on intensely fluorescent CD5+ cells, irrespective of the immunodeficiency state.

[Study of human lymphocyte subpopulations using a panel of monoclonal antibodies].

Characteristics of newly produced monoclonal antibodies (MCA) against differentiation antigens of human T- and B-lymphocytes and monocytes have been presented. The features of new MCA were compared with those of MCA with predefined specificity. According to two-color immunofluorescence and radioimmunoprecipitation data some of the former MCA were assigned to established clusters and the other were considered to recognize previously noncharacterized antigens.

Modelling of type 1 diabetes with monoclonal antibody ICA-1.

In order to investigate the possible role of pancreatic beta-cell p(64-69) antigens in the development of diabetes type 1, a monoclonal antibody (ICA-1) to the 64-69 kDa antigen family was produced and characterized. Short-term (0.25 mg per rat, intraperitoneally, daily for 9 days) and prolonged (0.

[The expression of an antigen interacting with monoclonal antibody IB4 on the surface membranes of normal human leukocytes and in lymphoproliferative diseases].

Monoclonal antibody (MAb) 1B4 of IgG3 isotype reacting with 55 +/- 10% peripheral blood lymphocytes was obtained. MAb 1B4 is bound with 100% of B and NK cells and 50-70% of T cells in blood. The most part of CD8+ cells (60-100%) and approximately 50% of CD4+ cells belong to 1B4+ population.

[An evaluation of the fine structure of a human lymphocyte population based on the data of 2-color flow immunofluorimetry].

A set of 2n basis lymphocyte subpopulation, distinguishing by the presence of at least one antigen, may be composed for a given combination of n surface antigens. The relative amounts of basis subpopulations constitute a thin subpopulation structure of lymphocytes. General methods of lymphocyte phenotyping using one (or two) differentiation antigen give actually the estimation of a sum of basis subpopulations expressing a given antigen (or some combination of two antigens).