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EN
Fasciola hepatica is a liver fluke that infects 2.4 million of people and causes great economical loss in animal production. To date a 100% effective vaccine has not been developed and the disease is controlled by drug therapy. Great efforts are put into development of effective vaccine against parasite what is difficult since Fasciola spp. (like other helmints) during evolutionary process has developed sophisticated and efficient methods to evade immune response. During preliminary experiments it is convenient to use cell lines which are relatively cheap and allow for reproducible comparison of results between laboratories. We stimulated BOMA (bovine monocyte/macrophage cell line) and BOMAC (bovine macrophage cell line) with native or recombinant antigens of Fasciola hepatica and assessed IFN-γ, IL-4 and TNF-α level upon stimulation. We observed diminished secretion of proinflammatory TNF-α in LPS activated BOMA cells stimulated with Excretory/Secretory products of adult fluke (Fh-ES). We also observed greater changes in gene expression in LPS activated BOMA cells than in non activated BOMA cells upon stimulation using Fh-ES. The results show possibility of using cell lines for in vitro research of bovine immune response against liver fluke, although this model still requires validation and further characterization.
EN
The objective of this study was to examine the clinical significance of selected indicators of immune response (IL-lß, 1L-4, IL-6. SAA, and Hp) in short-term combined intoxication exposure of pigs to low doses of deoxynivalenol, T-2 toxin, and zearalenone present in naturally contaminated feedstuffs during grain growth. Statistically significant differences were not noted after 14 d of feeding diets contaminated with the above mycotoxins. The mycotoxins did not induce inflammatory processes. The subclinical form of combined mycotoxicosis could be due to incorrect immunological response. The identification of the underlying cause would support the development of new methods for the prevention of combined mycotoxicosis.
EN
The aim of the study was the production of chicken polyclonal antibodies recognising hamster IL-4, IL-12p35, and IFN-γ, which were further used to estimate cytokine concentrations in splenocyte culture supernatants, obtained from three age groups of Ancylostoma ceylanicum infected hamsters. Worm burdens differed significantly among age groups; the younger animals were the more heavily infected. Th1 and Th2 type cytokines were detected only in cultures containing spleen cells from the oldest hamsters, which were the most resistant to hookworm infection. In cultures of cells from young more susceptible hamsters, the presence of IL-4 and IL-12 but not IFN-γ were observed.
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