Abstract
THE precise relationship between thymus-derived (T) helper cells in the antibody response and T effector cells in cellular immunity is not clear. Both cell functions have closely related dose response curves1, kinetics of sensitisation1, susceptibility to antibody suppression1–3 and anatomical distribution4. Bone marrow-derived (B) lymphocytes can be stimulated for antibody synthesis by a stimulus from immunocompetent allogeneic5 or xenogeneic6 lymphoid cells. These observations have led to the hypothesis that T helper cells are identical to cytotoxic T cells and act on B cells by secreting a factor which stimulates them to produce antibody. Liew and Parish7 have reported, however, that T helper cells in humoral immunity recognise different forms of chemically modified flagellin than do T cells in cellular immunity. Furthermore, Dennert8 has shown that T-helper and T-killer cells are mutually exclusive under certain immunisation conditions. The reports of Dennert8 and Liew and Parish7 suggest that T helper cells may not be identical to T effector cells in cellular immunity. We have now used a rosette technique9 which distinguishes different degrees of antigen-binding, in combination with velocity sedimentation at unit gravity10 to distinguish and separate T cells involved in the helper effect from T cells participating in cellular immunity reactions.
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ELLIOTT, B., HASKILL, J. Separation of T effector cells in humoral and cellular immunity. Nature 252, 607–608 (1974). https://doi.org/10.1038/252607a0
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DOI: https://doi.org/10.1038/252607a0
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