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A Human Ex Vivo Atherosclerotic Plaque Model to Study Lesion Biology

Published on: May 6, 2014

Distribution of inflammatory mediators in carotid and femoral plaques

Wei Zhou1, Hong Chai, Richard Ding

  • 1Division of Vascular and Endovascular Surgery, Department of Surgery, Stanford University, Stanford, CA 94305, USA. weizhou@stanford.edu

Journal of the American College of Surgeons
|July 9, 2010
PubMed

Insights

Femoral atherosclerotic plaques show distinct inflammatory profiles compared to carotid plaques, with differences in matrix metalloproteinase (MMP) and CD40 expression. These findings highlight unique characteristics of these vascular diseases.

Area of Science:

  • Vascular Biology
  • Immunology
  • Biochemistry

Background:

  • Atherosclerosis is a systemic disease, but carotid and femoral plaques present unique complications and treatment responses.
  • Understanding differences in inflammatory markers between these plaque types is crucial.

Purpose of the Study:

  • To compare inflammatory markers, specifically matrix metalloproteinase (MMP)-2 and MMP-9, in carotid and femoral atherosclerotic plaques.
  • To analyze the distribution of MMP-2, MMP-9, and CD40 within carotid plaques.

Main Methods:

  • Harvested carotid and femoral endarterectomy specimens.
  • Quantified messenger RNA (mRNA) and protein levels of MMP-2, MMP-9, and CD40 using real-time PCR, ELISA, and Western blot.
  • Performed immunohistochemistry on carotid specimens.

Main Results:

  • Femoral specimens showed lower MMP-2 protein and higher MMP-9 mRNA/protein compared to carotid specimens.
  • Within carotid plaques, MMP-2 mRNA/protein was lower in central regions, while MMP-9 and CD40 mRNA/protein were higher.
  • Immunohistochemistry revealed increased macrophages and CD40 in central carotid plaque regions.

Conclusions:

  • Carotid and femoral atherosclerotic plaques are distinct entities.
  • The distribution of inflammatory molecular markers differs significantly within these advanced plaques.
  • Further research is needed to elucidate these differences.
Abstract

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