Nonhematopoietic β-Arrestin-1 inhibits inflammation in a murine model of polymicrobial sepsis.

ABSTRACT: β-Arrestin-1 (βArr1), a scaffolding protein critical in G-protein coupled receptor desensitization has more recently been found to be important in the pathogenesis of various inflammatory diseases. We sought to understand the role of βArr1 in sepsis pathogenesis using a mouse model of polymicrobial sepsis. Although in previous studies we established that βArr1 deficiency protects mice from endotoxemia, here we demonstrate that the absence of βArr1 remarkably renders mice more susceptible to mortality in polymicrobial sepsis. In accordance with the mortality pattern, early production of inflammatory mediators was markedly enhanced in βArr1 knockout mice systemically and locally in various organs. In addition, enhanced inflammation in the heart was associated with increased NFκB activation.

SUBMITTER: Sharma D 

PROVIDER: S-EPMC4116700 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature