Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells

<p>Abstract</p> <p>Background</p> <p>Recent studies suggest that the chemotactic G-protein-coupled-receptor (GPCR) formyl-peptide-receptor-like-1 (FPRL1) and the receptor-for-advanced-glycation-end-products (RAGE) play an important role in the inflammatory response invo...

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Main Authors: Slowik Alexander, Merres Julika, Elfgen Anne, Jansen Sandra, Mohr Fabian, Wruck Christoph J, Pufe Thomas, Brandenburg Lars-Ove
Format: Article
Language:English
Published: BMC 2012-11-01
Series:Molecular Neurodegeneration
Subjects:
Online Access:http://www.molecularneurodegeneration.com/content/7/1/55
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spelling doaj-245cdfa612d94a0d82d3c3d5cdca70a72020-11-24T23:34:04ZengBMCMolecular Neurodegeneration1750-13262012-11-01715510.1186/1750-1326-7-55Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cellsSlowik AlexanderMerres JulikaElfgen AnneJansen SandraMohr FabianWruck Christoph JPufe ThomasBrandenburg Lars-Ove<p>Abstract</p> <p>Background</p> <p>Recent studies suggest that the chemotactic G-protein-coupled-receptor (GPCR) formyl-peptide-receptor-like-1 (FPRL1) and the receptor-for-advanced-glycation-end-products (RAGE) play an important role in the inflammatory response involved in neurodegenerative disorders such as Alzheimer’s disease (AD).</p> <p>Therefore, the expression and co-localisation of mouse formyl peptide receptor (mFPR) 1 and 2 as well as RAGE in an APP/PS1 transgenic mouse model using immunofluorescence and real-time RT-PCR were analysed. The involvement of rat or human FPR1/FPRL1 (corresponds to mFPR1/2) and RAGE in amyloid-β 1–42 (Aβ1-42)-induced signalling were investigated by extracellular signal regulated kinase 1/2 (ERK1/2) phosphorylation. Furthermore, the cAMP level in primary rat glial cells (microglia and astrocytes) and transfected HEK 293 cells was measured. Formyl peptide receptors and RAGE were inhibited by a small synthetic antagonist WRW4 and an inactive receptor variant delta-RAGE, lacking the intracytoplasmatic domains.</p> <p>Results</p> <p>We demonstrated a strong increase of mFPR1/2 and RAGE expression in the cortex and hippocampus of APP/PS1 transgenic mice co-localised to the glial cells. In addition, the Aβ1-42-induced signal transduction is dependant on FPRL1, but also on FPR1. For the first time, we have shown a functional interaction between FPRL1/FPR1 and RAGE in RAGE ligands S100B- or AGE-mediated signalling by ERK1/2 phosphorylation and cAMP level measurement. In addition a possible physical interaction between FPRL1 as well as FPR1 and RAGE was shown with co-immunoprecipitation and fluorescence microscopy.</p> <p>Conclusions</p> <p>The results suggest that both formyl peptide receptors play an essential role in Aβ1-42-induced signal transduction in glial cells. The interaction with RAGE could explain the broad ligand spectrum of formyl peptide receptors and their important role for inflammation and the host defence against infections.</p> http://www.molecularneurodegeneration.com/content/7/1/55Alzheimer diseaseAmyloid beta 1–42S100BFormyl peptide receptorGlial cellAstrocytesMicrogliaRAGESignal transduction
collection DOAJ
language English
format Article
sources DOAJ
author Slowik Alexander
Merres Julika
Elfgen Anne
Jansen Sandra
Mohr Fabian
Wruck Christoph J
Pufe Thomas
Brandenburg Lars-Ove
spellingShingle Slowik Alexander
Merres Julika
Elfgen Anne
Jansen Sandra
Mohr Fabian
Wruck Christoph J
Pufe Thomas
Brandenburg Lars-Ove
Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
Molecular Neurodegeneration
Alzheimer disease
Amyloid beta 1–42
S100B
Formyl peptide receptor
Glial cell
Astrocytes
Microglia
RAGE
Signal transduction
author_facet Slowik Alexander
Merres Julika
Elfgen Anne
Jansen Sandra
Mohr Fabian
Wruck Christoph J
Pufe Thomas
Brandenburg Lars-Ove
author_sort Slowik Alexander
title Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
title_short Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
title_full Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
title_fullStr Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
title_full_unstemmed Involvement of formyl peptide receptors in receptor for advanced glycation end products (RAGE) - and amyloid beta 1-42-induced signal transduction in glial cells
title_sort involvement of formyl peptide receptors in receptor for advanced glycation end products (rage) - and amyloid beta 1-42-induced signal transduction in glial cells
publisher BMC
series Molecular Neurodegeneration
issn 1750-1326
publishDate 2012-11-01
description <p>Abstract</p> <p>Background</p> <p>Recent studies suggest that the chemotactic G-protein-coupled-receptor (GPCR) formyl-peptide-receptor-like-1 (FPRL1) and the receptor-for-advanced-glycation-end-products (RAGE) play an important role in the inflammatory response involved in neurodegenerative disorders such as Alzheimer’s disease (AD).</p> <p>Therefore, the expression and co-localisation of mouse formyl peptide receptor (mFPR) 1 and 2 as well as RAGE in an APP/PS1 transgenic mouse model using immunofluorescence and real-time RT-PCR were analysed. The involvement of rat or human FPR1/FPRL1 (corresponds to mFPR1/2) and RAGE in amyloid-β 1–42 (Aβ1-42)-induced signalling were investigated by extracellular signal regulated kinase 1/2 (ERK1/2) phosphorylation. Furthermore, the cAMP level in primary rat glial cells (microglia and astrocytes) and transfected HEK 293 cells was measured. Formyl peptide receptors and RAGE were inhibited by a small synthetic antagonist WRW4 and an inactive receptor variant delta-RAGE, lacking the intracytoplasmatic domains.</p> <p>Results</p> <p>We demonstrated a strong increase of mFPR1/2 and RAGE expression in the cortex and hippocampus of APP/PS1 transgenic mice co-localised to the glial cells. In addition, the Aβ1-42-induced signal transduction is dependant on FPRL1, but also on FPR1. For the first time, we have shown a functional interaction between FPRL1/FPR1 and RAGE in RAGE ligands S100B- or AGE-mediated signalling by ERK1/2 phosphorylation and cAMP level measurement. In addition a possible physical interaction between FPRL1 as well as FPR1 and RAGE was shown with co-immunoprecipitation and fluorescence microscopy.</p> <p>Conclusions</p> <p>The results suggest that both formyl peptide receptors play an essential role in Aβ1-42-induced signal transduction in glial cells. The interaction with RAGE could explain the broad ligand spectrum of formyl peptide receptors and their important role for inflammation and the host defence against infections.</p>
topic Alzheimer disease
Amyloid beta 1–42
S100B
Formyl peptide receptor
Glial cell
Astrocytes
Microglia
RAGE
Signal transduction
url http://www.molecularneurodegeneration.com/content/7/1/55
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