Antigen dose response and specificity of production of the lymphokine eosinophil stimulation promoter.

The present investigations of the recently discovered lymphokine eosinophil stimulation promoter have (1) shown that the assay system is highly sensitive and reproducible via the establishment of dose-response curves and their statistical analysis, (2) demonstrated that the direct assay is specific with use of eosinophilrich peritoneal exudate cells obtained from mice with either schistosomiasis or trichinosis, (3) demonstrated that the indirect test with splenic lymphocytes is specific with use of both the above method and radioisotope-labeled antigens, and (4) provided information on the roles of eosinophils and mononuclear cells via purification, reconstitution, and the use of antiserum to eosinophils.