Mitogen-activated protein kinases (MAPKs) are modulated during Francisella tularensis infection, but inhibition of extracellular-signal-regulated kinases (ERKs) is of limited therapeutic benefit | Perpustakaan Fakultas Kedokteran dan Ilmu Kesehatan

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Mitogen-activated protein kinases (MAPKs) are modulated during Francisella tularensis infection, but inhibition of extracellular-signal-regulated kinases (ERKs) is of limited therapeutic benefit

Saint, R. J. - Nama Orang; D’Elia, R. V. - Nama Orang; Bryant, C. - Nama Orang; Clark, G. C. - Nama Orang; Atkins, H. S. - Nama Orang;

Abstract Francisella tularensis is a Gram-negative intracellular bacterium that causes the disease tularemia. The disease can be fatal if left untreated and there is currently no licenced vaccine available;the identificationofnew therapeutictargets is therefore required. Toll-like receptors represent an interestingtargetfortherapeuticmodulationduetotheiressentialrole in generating immune responses. In this study, we analysed the in vitro expression of the key mitogen-activated protein kinases(MAPKs)p38,JNKandERKinmurinealveolarmacrophages during infection with F. tularensis. The phosphorylation profile of ERK highlighted its potential as a target for therapeutic modulation and subsequently the effect of ERK manipulation was measured in a lethal intranasal F. tularensis in vivo model of infection. The selective ERK1/2 inhibitor PD0325901 was administered orally to mice either pre- or post-challenge with F. tularensis strain LVS. Both treatment regimens selectively reduced ERK expression, but only the pre-exposure treatment produced decreased bacterial burden in the spleen and liver, which correlated with a significant reduction in the pro-inflammatory cytokines IFN-γ, MCP-1, IL-6, and TNF-α. However, no overall improvements in survival were observed for treated animals in this study. ERK may represent a useful therapeutic target where selective dampening of the immune response (to control the damaging pathology seen during infection) is combined with antibiotic treatment required to eradicate bacterial infection. This combination treatment strategy has been shown to be effective in other models of tularemia.

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Informasi Detail

Judul Seri: -
No. Panggil: artikel
Penerbit: USA : Springer., 2016
Deskripsi Fisik: -
Bahasa: English
ISBN/ISSN: DOI 10.1007/s10096-0
Klasifikasi: NONE
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: Eur J Clin Microbiol Infect Dis
Subjek: Medicine
Francisella tularensis
Info Detail Spesifik: -
Pernyataan Tanggungjawab: -

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Mitogen-activated protein kinases (MAPKs) are modulated during Francisella tularensis infection, but inhibition of extracellular-signal-regulated kinases (ERKs) is of limited therapeutic benefit

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