The activation of EGFR promotes myocardial tumor necrosis factor-a production and cardiac failure in endotoxemia

21Citations
Citations of this article
15Readers
Mendeley users who have this article in their library.

Abstract

To study the effect of EGFR activation on the generation of TNF-a and the occurrence of cardiac dysfuncetion during sepsis, PD168393 and erlotinib (both are EGFR inhibitors) were applied to decreased the production of TNF-a and phosphrylation of ERK1/2 and p38 induced by LPS in cardiomyocytes. These results were further proved by specifically knocked down the expression of EGFR in vitro. Both TAPI-1, a TNF-a converting enzyme (TACE) inhibitor, and TGF-a neutralizing antibody could inhibit the activation of EGFR and the generation of TNF-a mRNA after LPS treatment. The increase of TGF-a in response to LPS could also be suppressed by TAPI-1. On the other hand, exogenous TGF-a increased the expression of TNF-a mRNA and partially reversed the inhibitory effect of TAPI-1 on expression of TNF-a mRNA in response to LPS indicating that the transactivation of EGFR by LPS in cardiomyocytes needs the help of TACE and TGF-a. In endotoxemic mice, inhibition the activation of EGFR not only decreased TNF-a production in the myocardium but also improved left ventricular pump function and ameliorated cardiac dysfunction and ultimately improved survival rate. All these results provided a new insight of how EGFR regulation the production of TNF-a in cardiomyocytes and a potential new target for the treatment of cardiac dysfunction in sepsis.

Cite

CITATION STYLE

APA

Sun, X., Liang, J., Yao, X., Lu, C., Zhong, T., Hong, X., … Tang, J. (2015). The activation of EGFR promotes myocardial tumor necrosis factor-a production and cardiac failure in endotoxemia. Oncotarget, 6(34), 35478–35495. https://doi.org/10.18632/oncotarget.6071

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free