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Fibulin-1 and fibrinogen in human atherosclerotic lesions

W Scott Argraves1, Asashi Tanaka, Elizabeth P Smith

  • 1Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC 29425-2204, USA. argraves@musc.edu

Histochemistry and Cell Biology
|August 21, 2009
PubMed

Insights

Fibulin-1 protein deposits overlap with fibrinogen in atherosclerotic lesions and fresh thrombi. This suggests fibulin-1 may contribute to cardiovascular disease progression, especially its thrombotic aspects.

Area of Science:

  • Cardiovascular Biology
  • Extracellular Matrix Research
  • Atherosclerosis Pathogenesis

Background:

  • Fibulin-1 is a blood protein and extracellular matrix (ECM) component in blood vessels.
  • Atherosclerosis involves complex changes in the arterial wall ECM.
  • Understanding protein deposition in lesions is crucial for disease insight.

Purpose of the Study:

  • To investigate the deposition patterns of fibulin-1 and fibrinogen in human coronary artery atherosclerotic lesions.
  • To correlate fibulin-1 localization with cellular and acellular components within these lesions.
  • To explore the potential role of fibulin-1 in the development and progression of cardiovascular disease.

Main Methods:

  • Analysis of human coronary artery atherosclerotic lesions obtained via atherectomy from 20 patients.
  • Immunohistochemical examination to detect and map fibulin-1 and fibrinogen deposition.
  • Correlation of fibulin-1 staining with the presence of macrophages, foam cells, and ECM characteristics.

Main Results:

  • Fibulin-1 deposition closely overlapped with fibrinogen within atherosclerotic lesions and fresh thrombi.
  • Intracellular fibulin-1 was observed in macrophages and foam cells, though these cells did not express fibulin-1.
  • Strong ECM fibulin-1 deposition occurred in acellular atheromatous and myxomatous regions, with lower levels near smooth muscle cells.

Conclusions:

  • Fibulin-1 deposition patterns in atherosclerotic lesions suggest a role in cardiovascular disease.
  • Fibulin-1, potentially from blood and interacting with fibrinogen, may influence thrombotic aspects of atherosclerosis.
  • Further research into fibulin-1's function in cardiovascular disease etiology and progression is warranted.

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