• Biochem. Biophys. Res. Commun. · Jul 2011

    Liberation of desmosine and isodesmosine as amino acids from insoluble elastin by elastolytic proteases.

    • Hideyuki Umeda, Masanori Aikawa, and Peter Libby.
    • Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
    • Biochem. Biophys. Res. Commun. 2011 Jul 29; 411 (2): 281-6.

    AbstractThe development of atherosclerotic lesions and abdominal aortic aneurysms involves degradation and loss of extracellular matrix components, such as collagen and elastin. Releases of the elastin cross-links desmosine (DES) and isodesmosine (IDE) may reflect elastin degradation in cardiovascular diseases. This study investigated the production of soluble elastin cross-linking structures by proteinases implicated in arterial diseases. Recombinant MMP-12 and neutrophil elastase liberated DES and IDE as amino acids from insoluble elastin. DES and IDE were also released from insoluble elastin exposed to monocyte/macrophage cell lines or human primary macrophages derived from peripheral blood monocytes. Elastin oxidized by reactive oxygen species (ROS) liberated more unconjugated DES and IDE than did non-oxidized elastin when incubated with MMP-12 or neutrophil elastase. These results support the exploration of free DES and IDE as biomarkers of elastin degradation.Copyright © 2011 Elsevier Inc. All rights reserved.

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