| Abstract: | Influence of immunomodulator of bacterial origin - purified staphylococcal toxoid (PST) - on the synthesisof proinlammatory (IL-1beta, IL-6, TNFalpha, IFN-gamma) and anti-inflammatory (IL- 10) cytokines, as well as cytokines directing the immune response to Th1 (IL-12) or Th2 (IL-4) type was studied in mice. Serum cytokines levels as well as levels of cytokines produced by splenocytes spontaneously or after stimulation by phytohemagglutinin were measured 4 and 24 hours after inoculation of PST. It was shown that PST in wide spectrum of doses (15; 1.5; 0.15 BU per mouse) was able to enhance or suppress synthesis of cytokines. Effect was nonlinear and its direction was depended from cytokine, time interval passed before obtaining the sample and dose of PST. For example, 15 BU of PST enhanced whereas 0.15 BU of PST suppressed the IL-6 production 4 hours after inoculation. Decrease of IL-6 level in serum 24 hours after inoculation of PST was detected. Synthesis of several serum interleukins (IL-2, IL-10) did not changed 4 and 24 hours after inoculation irrespective from dose of PST. It was demonstrated that modulation of humoral immune response in vivo induced by PST did not associated with modulation of cytokine profile. For example, increase of number of cells secreting antibodies to sheep erythrocytes was registered both during increased synthesis of cytokines (4 hours, IL-1beta, IL-6, IL-12) and during period of its depression (IL-6, TNF-alpha, IFN-gamma), as well as during stable production of cytokines (IL-1beta, IL-6, IFN-gamma). |
