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. 1980 Mar;77(3):1607–1611. doi: 10.1073/pnas.77.3.1607

Functional characteristics of human T-cell subpopulations distinguished by a monoclonal antibody*

Edgar G Engleman †, Claudia Benike †, Barbara Osborne ‡, Richard Goldsby §
PMCID: PMC348546  PMID: 6445560

Abstract

In animals and in man, diverse immunologic functions are mediated by specialized T-cell (thymus-derived lymphocyte) subsets that are distinguishable from one another on the basis of differences in cell surface determinants. Unfortunately, in humans, subset-specific antibodies have been difficult to generate. In this study, production of a murine monoclonal antibody specific for a subset of human T cells was achieved by fusing a sensitized B cell (bone marrow-derived cell) with a myeloma cell and isolating the antibody secreted by the resultant hybrid clone. This antibody binds 30-35% of peripheral T lymphocytes (Ta+ cells) but fails to bind remaining T lymphocytes (Ta- cells), B lymphocytes, or monocytes. Ta+ and Ta- subpopulations were separated with a fluorescence-activated cell sorter and their in vitro responses to various stimuli were assessed. Ta+ and Ta- cells respond equally well to soluble antigens, allogeneic B cells, and autologous B cells, but only Ta+ cells respond to concanavalin A. Ta+ cells cultured in the presence of concanavalin A gradually lose the Ta marker, an effect not observed after stimulation with phytohemagglutinin, soluble antigens, or alloantigens. These results suggest that the functional subpopulation of T cells defined by Ta does not correspond to any previously described human T cell subset. Furthermore, somatic cell hybridization has been shown to be a feasible method for production of monoclonal antibodies specific for subpopulations of human lymphocytes.

Keywords: hybrids, concanavalin A

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Selected References

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