CPEB1 modulates lipopolysaccharide-mediated iNOS induction in rat primary astrocytes.

Abstract:

:Upon CNS damage, astrocytes undergo a series of biological changes including increased proliferation, production of inflammatory mediators and morphological changes, in a response collectively called reactive gliosis. This process is an essential part of the brains response to injury, yet much is unknown about the molecular mechanism(s) that induce these changes. In this study, we investigated the role of cytoplasmic polyadenylation element binding protein 1 (CPEB1) in the regulation of inflammatory responses in a model of reactive gliosis, lipopolysaccharide-stimulated astrocytes. CPEB1 is an mRNA-binding protein recently shown to be expressed in astrocytes that may play a role in astrocytes migration. After LPS stimulation, the expression and phosphorylation of CPEB1 was increased in rat primary astrocytes in a JNK-dependent process. siRNA-induced knockdown of CPEB1 expression inhibited the LPS-induced up-regulation of iNOS as well as NO and ROS production, a hallmark of immunological activation of astrocytes. The results from the study suggest that CPEB1 is actively involved in the regulation of inflammatory responses in astrocytes, which might provide new insights into the regulatory mechanism after brain injury.

authors

Kim KC,Hyun Joo S,Shin CY

doi

10.1016/j.bbrc.2011.05.065

subject

Has Abstract

pub_date

2011-06-17 00:00:00

pages

687-92

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(11)00832-1

journal_volume

409

pub_type

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