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RAGE signaling contributes to neuroinflammation in infantile neuronal ceroid lipofuscinosis.


ABSTRACT: Palmitoyl-protein thioesterase-1 (PPT1) deficiency causes infantile neuronal ceroid lipofuscinosis (INCL), a devastating childhood neurodegenerative storage disorder. We previously reported that neuronal apoptosis in INCL is mediated by endoplasmic reticulum-stress. ER-stress disrupts Ca(2+)-homeostasis and stimulates the expression of Ca(2+)-binding proteins. We report here that in the PPT1-deficient human and mouse brain the levels of S100B, a Ca(2+)-binding protein, and its receptor, RAGE (receptor for advanced glycation end-products) are elevated. We further demonstrate that activation of RAGE signaling in astroglial cells mediates pro-inflammatory cytokine production, which is inhibited by SiRNA-mediated suppression of RAGE expression. We propose that RAGE signaling contributes to neuroinflammation in INCL.

SUBMITTER: Saha A 

PROVIDER: S-EPMC2597448 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature

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RAGE signaling contributes to neuroinflammation in infantile neuronal ceroid lipofuscinosis.

Saha Arjun A   Kim Sung-Jo SJ   Zhang Zhongjian Z   Lee Yi-Ching YC   Sarkar Chinmoy C   Tsai Pei-Chih PC   Mukherjee Anil B AB  

FEBS letters 20081021 27


Palmitoyl-protein thioesterase-1 (PPT1) deficiency causes infantile neuronal ceroid lipofuscinosis (INCL), a devastating childhood neurodegenerative storage disorder. We previously reported that neuronal apoptosis in INCL is mediated by endoplasmic reticulum-stress. ER-stress disrupts Ca(2+)-homeostasis and stimulates the expression of Ca(2+)-binding proteins. We report here that in the PPT1-deficient human and mouse brain the levels of S100B, a Ca(2+)-binding protein, and its receptor, RAGE (re  ...[more]

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