BACKGROUND: Francisella tularensis, a causative agent of human tularemia, displaying the ability to proliferate inside the human cells. AIMS: To evaluate the growth potential of F. tularensis LVS strain in macrophage-like cell line J774 modulated by recombinant interferon gamma and E. coli derived lipopolysaccharide. RESULTS: Stimulation of J774 cells either by interferon-gamma or lipopolysaccharide alone, or especially in combination before infection F. tularensis, revealed protective effects. Higher concentrations of stimulating agents were needed to inhibit ongoing F. tularensis infection. CONCLUSIONS: Stimulation of J774 cell line by combination of interferon-gamma with lipopolysaccharide inhibits the intracellular growth of F. tularensis.
BACKGROUND:Francisella tularensis, a causative agent of humantularemia, displaying the ability to proliferate inside the human cells. AIMS: To evaluate the growth potential of F. tularensis LVS strain in macrophage-like cell line J774 modulated by recombinant interferon gamma and E. coli derived lipopolysaccharide. RESULTS: Stimulation of J774 cells either by interferon-gamma or lipopolysaccharide alone, or especially in combination before infection F. tularensis, revealed protective effects. Higher concentrations of stimulating agents were needed to inhibit ongoing F. tularensis infection. CONCLUSIONS: Stimulation of J774 cell line by combination of interferon-gamma with lipopolysaccharide inhibits the intracellular growth of F. tularensis.
Authors: David E Place; David R Williamson; Yevgeniy Yuzefpolskiy; Bhuvana Katkere; Surojit Sarkar; Vandana Kalia; Girish S Kirimanjeswara Journal: PLoS One Date: 2017-12-28 Impact factor: 3.240