[Lymphotoxin production by human lymphocytes. I. Study of the supernatants of phytohemagglutinin stimulated human lymphocyte cultures].

Lymphotoxin was found to be present in supernatants from 22 human lymphocytes cultures stimulated with phytohemagglutinin in a dose of 5 and 10 microgram/ml. The lymphocytes were obtained from the peripheral blood of 6 apparently healthy persons. Lymphotoxin activity was determined by simple and objective method, i.