Subpopulations of human T lymphocytes. XVIII. T lymphocytes with receptors for IgE (T epsilon) in patients with primary immunodeficiency and hyperimmunoglobulinaemia E states.

Four of 18 patients with common variable immunodeficiency and one of eight patients with selective IgA deficiency had increased proportions of T epsilon cells. Three patients with common variable immunodeficiency and two with selective IgA deficiency had increased numbers of T epsilon cells. Three patients with common variable immunodeficiency had decreased numbers of T epsilon cells. Five of six patients with hyperimmunoglobulinaemia E had high proportions of T epsilon cells; this increase was not related to the elevated IgE levels.