Involvement of c-Jun N-terminal kinase in rF1 mediated activation of murine peritoneal macrophages in vitro.
Fraction 1 (F1) protein forms a capsule on the surface of Yersinia pestis. Recently, we reported rF1-induced activation of macrophages. In current investigation, we studied the role of JNK MAPK signal transduction pathway in rF1-induced activation of macrophages in vitro. SP600125, a specific inhibitor of JNK, inhibited JNK MAPK phosphorylation, indicating the specificity of the above response. Though, the rF1-induced phosphorylation of JNK MAPK was also inhibited by upstream protein kinase C inhibitor H7, tyrosine kinase inhibitor genestein and PI3-K inhibitor wotmannin. Activation of the transcription factor NF-kB (phosphorylation of IkB) and c-Jun was observed in response to rF1 treatment. The rF1-induced JNK MAPK activity was correlated to the functional activation of macrophages by demonstrating the inhibition of NO, TNF-alpha production and microtubule polymerization caused by SP600125. Taken together, the data suggests the involvement of JNK MAPK/NF-kB pathway in rF1-induced activation of macrophages.
School of Biotechnology, Banaras Hindu University, Varanasi, 221005, India.
Rajesh Kumar
RK
Sharma
Ajit
A
Sodhi
Harsh Vardhan
HV
Batra
D000818:Animals; D001426:Bacterial Proteins / Q000276:immunology*; D048031:JNK Mitogen-Activated Protein Kinases / Q000502:physiology*; D020935:MAP Kinase Signaling System / Q000276:immunology; D008262:Macrophage Activation; D017737:Macrophages, Peritoneal / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology; D051379:Mice; D008807:Mice, Inbred BALB C; D008870:Microtubules / Q000378:metabolism; D016328:NF-kappa B / Q000276:immunology / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D010766:Phosphorylation; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
D001426:Bacterial Proteins; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; C086725:caf1 protein, Yersinia pestis; D009569:Nitric Oxide; D048031:JNK Mitogen-Activated Protein Kinases