Reduction of nuclear factor kappa b activity post myocardial infarction improves ventricular remodeling by attenuating the inflammatory response

2004 ◽  
Vol 52 (S 1) ◽  
Author(s):  
BK Podesser ◽  
K Trescher ◽  
O Bernecker ◽  
B Fellner ◽  
S Semsroth ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Inflammatory Response ◽  
Nuclear Factor Kappa B ◽  
Ventricular Remodeling ◽  
Post Myocardial Infarction ◽  
Nuclear Factor ◽  
Nuclear Factor Kappa

BaeR protein acts as an activator of nuclear factor-kappa B and Janus kinase 2 to induce inflammation in murine cell lines

2016 ◽  
Vol 62 (9) ◽  
pp. 753-761
Author(s):  
Seung-Jin Lee ◽  
Biruk Tesfaye Birhanu ◽  
Elias Gebru Awji ◽  
Myung Hee Kim ◽  
Ji-Yong Park ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Nuclear Factor Kappa B ◽  
Inflammatory Responses ◽  
Janus Kinase ◽  
Cytokine Gene Expression ◽  
Raw 264.7 Cells ◽  
Nuclear Factor ◽  
Janus Kinase 2 ◽  
Nuclear Factor Kappa ◽  
Cox 2

BaeR, a response regulator protein, takes part in multidrug efflux, bacterial virulence activity, and other biological functions. Recently, BaeR was shown to induce inflammatory responses by activating the mitogen-activated protein kinases (MAPKs). In this study, we investigated additional pathways used by BaeR to induce an inflammatory response. BaeR protein was purified from Salmonella enterica Paratyphi A and subcloned into a pPosKJ expression vector. RAW 264.7 cells were treated with BaeR, and RNA was extracted by TRIzol reagent for RT-PCR. Cytokine gene expression was analyzed by using the comparative cycle threshold method, while western blotting and ELISA were used to assess protein expression. We confirmed that BaeR activates nuclear factor-kappa B (NF-κB), thereby inducing an inflammatory response and increases the production of interleukins (IL-)1β and IL-6. During this process, the Janus kinase 2 (JAK2)–STAT1 signaling pathway was activated, resulting in an increase in the release of interferons I and II. Additionally, COX-2 was activated and its expression increased with time. In conclusion, BaeR induced an inflammatory response through activation of NF-κB in addition to the MAPKs. Furthermore, activation of the JAK2–STAT1 pathway and COX-2 facilitated the cytokine binding activity, suggesting an additional role for BaeR in the modulation of the immune system of the host and the virulence activity of the pathogen.

Sign in / Sign up

Export Citation Format

Share Document