title: Delayed hypersensitivity and migration inhibition in two lines of mice genetically selected for high or low responsiveness to phytohemagglutinin.
abstract: Delayed-type hypersensitivity (DTH) and cell migration inhibition (MI) were studied in two lines of mice genetically selected for the high (Hi/PHA) or low (Lo/PHA) in vitro response of their lymphoid cells to phytochemagglutinin (PHA). A rapid photoelectric procedure for reading cell migrations enabled the study of MI over a wide range (10 log) of antigen concentrations in vitro. Hi/PHA mice required immunization with a 10 times higher dose of ovalbumin (OVA) in Freund's complete adjuvant (FCA) than Lo/PHA mice for a comparable response in DTH (footpad swelling) and MI of their induced peritoneal exudate cells (PEC). Lo/PHA spleen showed marked bizonal MI on Day 5 after immunization with low doses (0.1 and 0.5 micrograms) of OVA in FCA, one peak being obtained in presence of in vitro concentrations of 10(-3) or 10(-2) micrograms/ml OVA and another peak at 1 or 10 micrograms/ml, whereas Hi/PHA spleen showed stimulation of migration. In contrast, MI in Lo/PHA spleen failed to persist beyond Day 19, whereas it appeared progressively in Hi/PHA spleen, being maximal by Day 27. Low-zone inhibition in Hi/PHA spleen and PEC was lacking or poor even after immunization with higher doses of OVA in FCA. The implications of these findings are discussed.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D001202:Ascitic Fluid / Q000166:cytology; D002464:Cell Migration Inhibition; D003520:Cyclophosphamide / Q000494:pharmacology; D004306:Dose-Response Relationship, Immunologic; D006968:Hypersensitivity, Delayed; D007114:Immunization; D007700:Kinetics; D008213:Lymphocyte Activation; D051379:Mice; D010047:Ovalbumin / Q000276:immunology; D010835:Phytohemagglutinins / Q000494:pharmacology*; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000906:Antibodies; D010835:Phytohemagglutinins; D003520:Cyclophosphamide; D010047:Ovalbumin