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  • Title: Repair in arterial tissue. An ultrastructural demonstration of proteoglycans in low temperature embedded normal and healing arterial tissue.
    Author: Chemnitz J, Christensen BC.
    Journal: Acta Pathol Microbiol Immunol Scand A; 1983 Nov; 91(6):477-82. PubMed ID: 6666584.
    Abstract:
    Low temperature embedded normal and healing arterial tissues were studied by transmission electron microscopy. The most conspicuous observation was the ultrastructurally well-preserved extracellular matrix of the arterial tissue. The proteoglycans were visible as rod-like structures (20-50 nm in width and about 200 nm in length) and radiating filaments connecting the granules to each other. The rod-like structures were removed after testicular hyaluronidase digestion. Chondroitinase ABC digestion removed most of the rod-like structures. Re-endothelialized neointima revealed a high content of rod-like structures forming a three-dimensional muralium joining together basal membrane microfibrils, collagen microfibrils and the microfibrillar component of elastin, whereas non-re-endothelialized neointima showed a reduced content of proteoglycans. The cylindrical granules may represent the proteoglycan monomer with condensed glycosaminoglycan chains.
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