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Title 

GADD45β plays a protective role in acute lung injury by regulating apoptosis in experimental sepsis in vivo

Authors 

Sung-Je MoonHyun-Yong KimYong-Hoon KimKyoung Shim KimJung-Ran NohHyun-Jong KimJi-Hyun ChoiJung Hwan HwangChul Ho Lee

Publisher 

Wiley

Issue Date 

2018

Citation 

Journal of Cellular Physiology

Keywords 

GADD45βacute lung injuryapoptosislipopolysaccharidesepsis

Abstract 

Sepsis is a systemic inflammatory response syndrome due to microbial infection. Growth arrest and DNA-damage-inducible 45?beta (GADD45β) are induced by genotoxic stress and inflammatory cytokines. However, the role of GADD45β during bacterial infection remains unclear. This study was aimed at investigating the role of GADD45β in sepsis. We used GADD45β-knockout (KO) mice and C57BL/6J wild-type (WT) mice. Experimental sepsis was induced by lipopolysaccharide (LPS) administration or cecal ligation and puncture (CLP). Sepsis-induced mortality was higher in GADD45β-KO mice than in WT mice. Histopathological data demonstrated LPS treatment markedly increased lung injury in GADD45β-KO mice as compared to that in WT mice; however, no significant difference was observed in the liver and kidney. Further, mRNA levels of inflammatory cytokines, such as Il-1β, Il-6, Il-10, and Tnf-α, were higher in the lungs of LPS-treated GADD45β-KO mice than in WT mice. Interestingly, plasma levels of these inflammatory cytokines were decreased in LPS-administered GADD45β-KO mice. A significant increase in lung cell apoptosis was observed at early time points in GADD45β-KO mice after administration of LPS as compared to that in WT mice. In line with LPS-induced apoptosis, JNK, and p38 activity was higher in the lung of GADD45β-KO mice at 3?hr after LPS treatment than that in WT mice. In summary, this study is the first to demonstrate the protective role of GADD45β in sepsis and the results suggest that GADD45β could be used as a novel therapeutic target to cure sepsis.

ISSN 

0021-9541

Link 

http://dx.doi.org/10.1002/jcp.26635

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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