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A proteomic analysis of C-reactive protein stimulated THP-1 monocytes.

ABSTRACT: BACKGROUND:C-reactive protein (CRP) is a predictor of cardiovascular risk. It circulates as a pentameric protein in plasma. Recently, a potential dissociation mechanism from the disc-shaped pentameric CRP (pCRP) into single monomers (monomeric or mCRP) has been described. It has been shown that mCRP has strong pro-inflammatory effects on monocytes. To further define the role of mCRP in determining monocyte phenotype, the effects of CRP isoforms on THP-1 protein expression profiles were determined. The hypothesis to be tested was that mCRP induces specific changes in the protein expression profile of THP-1 cells that differ from that of pCRP. METHODS:Protein cell lysates from control and mCRP, pCRP or LPS-treated THP-1 cells were displayed using 2-dimensional SDS PAGE and compared. Differentially expressed proteins were identified by MALDI-TOF MS and confirmed by Western blotting. RESULTS:mCRP significantly up-regulates ubiquitin-activating enzyme E1, a member of the ubiquitin-proteasome system in THP-1 monocytes. Furthermore, HSP 70, alpha-actinin-4 (ACTN4) and alpha-enolase/enolase 1 were upregulated. The proteomic profile of LPS and pCRP treated monocytes differ significantly from that of mCRP. CONCLUSION:The data obtained in this study support the hypothesis that isoform-specific effects of CRP may differentially regulate the phenotype of monocytes.

SUBMITTER: Eisenhardt SU

PROVIDER: S-EPMC3023727 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature

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A proteomic analysis of C-reactive protein stimulated THP-1 monocytes.

Eisenhardt Steffen U SU Habersberger Jonathon J Oliva Karen K Lancaster Graeme I GI Ayhan Mustafa M Woollard Kevin J KJ Bannasch Holger H Rice Greg E GE Peter Karlheinz K

Proteome science 20110110 1

<h4>Background</h4>C-reactive protein (CRP) is a predictor of cardiovascular risk. It circulates as a pentameric protein in plasma. Recently, a potential dissociation mechanism from the disc-shaped pentameric CRP (pCRP) into single monomers (monomeric or mCRP) has been described. It has been shown that mCRP has strong pro-inflammatory effects on monocytes. To further define the role of mCRP in determining monocyte phenotype, the effects of CRP isoforms on THP-1 protein expression profiles were d ...[more]

PMID: 21219634

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Dataset Information

A proteomic analysis of C-reactive protein stimulated THP-1 monocytes.

Publications

A proteomic analysis of C-reactive protein stimulated THP-1 monocytes.

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