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Article Abstract
Influence of the recombinant culture filtered protein 10 (CFP-10) and early-secreted antigenic target 6kDa protein (ESAT-6) (r-CFP-10-ESAT-6, rCE) of Mycobacterium tuberculosis (Mtb) on human monocyte and macrophage activation was investigated using human monocyte, monocyte like THP-1 cell line and monocyte derived macrophage (MDM). rCE solely enhanced TNF-alpha release from human monocytes and THP-1 cells in a dose- and time-dependent manner. rCE enhanced expression of CD80 and CD40, it also synergized with IFN-gamma in induction of TNF-alpha production and HLA-DR expression. Pharmacological agents that selectively inhibit mitogen activated protein kinase activation markedly suppressed rCE-induced TNF- alpha release. However, continuous presence of rCE (>72h) during monocyte to macrophage differentiation inhibited macrophage response to LPS stimulation. Collectively, these data suggest that rCE might have differential influence on monocyte and macrophage activation, which might be correlated with Mtb immune evasion.
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| http://dx.doi.org/10.1016/j.bbrc.2007.11.022 | DOI Listing |
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