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• W2139226540 endingPage "1570" @default.
• W2139226540 startingPage "1556" @default.
• W2139226540 abstract "The pathogenesis of Mycobacterium tuberculosis involves the coordinate action of multiple bacillary components that modulate host immune responses to ensure its survival. One such group of factors is the multigenic PE_PPE protein family, several members of which have been implicated in host immune evasion. Here we investigate the function of the PE-PPE gene pair PE35 (Rv3872)-PPE68 (Rv3873), located in the region of difference 1, encoding a specialized mycobacterial secretion system that is deleted in all vaccine strains of Mycobacterium bovis BCG. We report that this gene pair is co-operonic in M. tuberculosis, and demonstrate that its gene products interact with each other. Stimulation of THP-1 macrophages with recombinant PE35 and PPE68, singly or in combination, led to a dose-dependent increase in levels of the anti-inflammatory cytokine interleukin (IL)-10 and the chemokine monocyte chemoattractant protein-1, and caused a reciprocal decrease in levels of the proinflammatory cytokine IL-12. PE35/PPE68-stimulated production of IL-10 and monocyte chemoattractant protein-1 was observed to be dependent on toll-like receptor 2, as receptor blockade caused a significant reduction in their levels. Pharmacological inhibition indicated that this induction involved activation of the mitogen-activated protein kinase signalling axis. In a transwell migration assay, culture supernatants from PE35/PPE68-treated THP-1 cells were observed to stimulate the migration of monocytes. Our findings suggest that the PE35-PPE68 gene pair plays an important immunomodulatory role in regulating the pathophysiology of M. tuberculosis.TLR2 physically interacts with PPE68 by anti bait coimmunoprecipitation (View interaction) PE35 binds to PPE68 by pull down (View interaction) PE35 physically interacts with PPE68 by anti tag coimmunoprecipitation (View interaction) TLR2 physically interacts with PE35 by anti bait coimmunoprecipitation (View interaction) PPE68 and PE35 physically interact by dihydrofolate reductase reconstruction (View interaction)." @default.
• W2139226540 created "2016-06-24" @default.
• W2139226540 creator A5023154972 @default.
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• W2139226540 date "2014-02-12" @default.
• W2139226540 modified "2023-09-23" @default.
• W2139226540 title "An immunomodulatory role for the<i>Mycobacterium tuberculosis</i>region of difference 1 locus proteins PE35 (Rv3872) and PPE68 (Rv3873)" @default.
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• W2139226540 doi "https://doi.org/10.1111/febs.12723" @default.
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