Thromb Haemost 2002; 88(05): 827-833
DOI: 10.1055/s-0037-1613310
Review Article
Schattauer GmbH

Physical and Enzymatic Perturbation of the Architecture of the Tunica media Destroys its Inherent Thromboresistance

Erzsebet Komorowicz
1   Visiting Scientist from Department of Medical Biochemistry, Semmelweis University, Budapest, Hungary
,
Robert D. McBane II
2   Division of Cardiovascular Medicine, Mayo Clinic/Foundation, Rochester, MN
,
David N. Fass
3   Section of Hematology Research, Mayo Clinic/Foundation, Rochester, MN, USA
› Author Affiliations
Further Information

Publication History

Received 18 July 2002

Accepted 22 July 2002

Publication Date:
08 December 2017 (online)

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Summary

The media layer of the arterial cryo-cross sections, is defective for vWf-dependent platelet adhesion. Exposure of the same layer by stripping off the most inner portions of the vessel wall results in a highly thrombogenic surface. Stripping or balloon dilation was applied to porcine arteries prior to functional assays. Cryosections of treated or untreated arteries were perfused with porcine blood at 3350 s-1 and platelet deposition was detected by indirect immunofluorescence. Following balloon dilation, vWf-dependent platelet deposition increased; covering 9.08 ± 1.36% of the total media surface area, this value for untreated vessels was 0.88 ± 0.14%. A 10-fold increase was also found in the binding of vWf-coated fluorescent beads to the media. In addition to mechanical procedures, treatment by serine-proteases like trypsin, chymotrypsin and proteinase 3, or by chondroitinase ABC, but not by heparitinase also resulted in a 7-10-fold increase in platelet coverage over the media. Collagen in the media may be complexed with another vessel wall component shielding the vWf-binding sites. Mechanical or biochemical processes unmask these sites, and increase the thrombogenicity of the vessel wall.