Continuous treatment with recombinant Mycobacterium tuberculosis CFP-10-ESAT-6 protein activated human monocyte while deactivated LPS-stimulated macrophage.
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.
Feng
Yonghong
Y
Shanghai Key Laboratory of Tuberculosis, Shanghai Pulmonary Hospital, Tongji University, 507 Zhengmin Road, Shanghai 200433, PR China.
Yang
Xin
X
Liu
Zhonghua
Z
Liu
Yaoting
Y
Su
Bo
B
Ding
Yuansheng
Y
Qin
Lianhua
L
Yang
Hua
H
Zheng
Ruijuan
R
Hu
Zhongyi
Z
D000942:Antigens, Bacterial / Q000235:genetics / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics / Q000494:pharmacology*; D002460:Cell Line; D006801:Humans; D008070:Lipopolysaccharides / Q000276:immunology; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology*; D009000:Monocytes / Q000187:drug effects* / Q000276:immunology; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
D000942:Antigens, Bacterial; D001426:Bacterial Proteins; C117940:CFP-10 protein, Mycobacterium tuberculosis; C093276:ESAT-6 protein, Mycobacterium tuberculosis; D008070:Lipopolysaccharides; D011993:Recombinant Fusion Proteins; D014409:Tumor Necrosis Factor-alpha