Plasma Levels of Endothelial Microparticles Bearing Monomeric C-reactive Protein are Increased in Peripheral Artery Disease

Jeffrey R. Crawford, JoAnn Trial, Vijay Nambi, Ron C. Hoogeveen, George Taffet, Mark L. Entman

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

C-reactive protein (CRP) as an indicator of cardiovascular disease (CVD) has shown limited sensitivity. We demonstrate that two isoforms of CRP (pentameric, pCRP and monomeric, mCRP) present in soluble form or on microparticles (MPs) have different biological effects and are not all measured by clinical CRP assays. The high-sensitivity CRP assay (hsCRP) did not measure pCRP or mCRP on MPs, whereas flow cytometry did. MPs derived from endothelial cells, particularly those bearing mCRP, were elevated in peripheral artery disease (PAD) patients compared to controls. The numbers of mCRP+ endothelial MPs did not correlate with hsCRP measurements of soluble pCRP, indicating their independent modulation. In controls, statins lowered mCRP+ endothelial MPs. In a model of vascular inflammation, mCRP induced endothelial shedding of MPs and was proinflammatory, while pCRP was anti-inflammatory. mCRP on endothelial MPs may be both an unmeasured indicator of, and an amplifier of, vascular disease, and its detection might improve risk sensitivity.

Original languageEnglish (US)
Pages (from-to)184-193
Number of pages10
JournalJournal of Cardiovascular Translational Research
Volume9
Issue number3
DOIs
StatePublished - Jun 1 2016

Keywords

  • CRP
  • Inflammation
  • Microparticle
  • Monomeric CRP
  • Pentameric CRP
  • Peripheral artery disease
  • hsCRP

ASJC Scopus subject areas

  • Molecular Medicine
  • Genetics
  • Pharmaceutical Science
  • Cardiology and Cardiovascular Medicine
  • Genetics(clinical)

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