Inhibition of neutrophil locomotion, natural killer cell cytotoxicity and lymphocyte transformation by 1-methyl-3-phenyl-1,2,4-triazinium-5-olate, a novel triazinium zwitterion

Effect of the novel triazinium zwitterion 1-methyl-3-phenyl-1,2,4-triazinium-5-olate on immunological responses and experimental brucellosis in mice

The immunopharmacology of a novel triazinium zwitterion, designated JR-6, was studied in mice. Experiments show dose-response inhibition of antibody and delayed-type hypersensitivity (DTH) responses to sheep red blood cell antigens. Suppression of DTH was confirmed using trinitrochlorobenzene as a contact-sensitizing antigen. Using a model of experimental brucellosis in mice, it was found that JR-6 caused suppression of specific antibody and DTH reaction, as well as spleen weight, but a statistically significant increase in viable counts of Brucella abortus was not observed. Extensive short-term toxicology studies showed reduction in lymphocyte and neutrophil counts, and slow weight gain of treated mice. However, organ histology, liver function tests and biochemical profiles were normal.