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Gamma-secretase limits the inflammatory response through the processing of LRP1.


ABSTRACT: Inflammation is a potentially self-destructive process that needs tight control. We have identified a nuclear signaling mechanism through which the low-density lipoprotein receptor-related protein 1 (LRP1) limits transcription of lipopolysaccharide (LPS)-inducible genes. LPS increases the proteolytic processing of the ectodomain of LRP1, which results in the gamma-secretase-dependent release of the LRP1 intracellular domain (ICD) from the plasma membrane and its translocation to the nucleus, where it binds to and represses the interferon-gamma promoter. Basal transcription of LPS target genes and LPS-induced secretion of proinflammatory cytokines are increased in the absence of LRP1. The interaction between LRP1-ICD and interferon regulatory factor 3 (IRF-3) promotes the nuclear export and proteasomal degradation of IRF-3. Feedback inhibition of the inflammatory response through intramembranous processing of LRP1 thus defines a physiological role for gamma-secretase.

SUBMITTER: Zurhove K 

PROVIDER: S-EPMC2694618 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature

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Gamma-secretase limits the inflammatory response through the processing of LRP1.

Zurhove Kai K   Nakajima Chikako C   Herz Joachim J   Bock Hans H HH   May Petra P  

Science signaling 20081125 47


Inflammation is a potentially self-destructive process that needs tight control. We have identified a nuclear signaling mechanism through which the low-density lipoprotein receptor-related protein 1 (LRP1) limits transcription of lipopolysaccharide (LPS)-inducible genes. LPS increases the proteolytic processing of the ectodomain of LRP1, which results in the gamma-secretase-dependent release of the LRP1 intracellular domain (ICD) from the plasma membrane and its translocation to the nucleus, whe  ...[more]

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