Abstract
Receptors for prostaglandin E2 or histamine were measured on subpopulations of human lymphocytes, using the cyclic AMP increase after exposure to prostaglandin or histamine as an indicator for the presence of receptors. The cyclic AMP response to prostaglandin E2 was similar in unfractionated lymphocytes and the T-enriched and T-depleted fractions. Within the T-enriched population, T cells bearing a receptor for the Fc portion of IgG (T gamma-cells) had a 27.4-fold rise in cyclic AMP after exposure to prostaglandin E2, whereas the remaining T cells (non-T gamma cells) had a fourfold increase. It would appear that prostaglandin receptors are concentrated on a small subfraction of T gamma cells, comprising approximately 15% of the T-cell population. The cyclic AMP response to histamine was less than twofold in all lymphocyte fractions.
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Selected References
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