Abstract
Laminins, one of the major functional components of basement membranes, are found underlying endothelium, and encasing pericytes and smooth muscle cells in the vessel wall. Depending on the type of blood vessel (capillary, venule, postcapillary venule, vein or artery) and their maturation state, both the endothelial and mural cell phenotype vary, with associated changes in laminin isoform expression. Laminins containing the α4 and α5 chains are the major isoforms found in the vessel wall, with the added contribution of laminin α2 in larger vessels. We here summarize current data on the precise localization of these laminin isoforms and their receptors in the different layers of the vessel wall, and their potential contribution to vascular homeostasis.
Publication types
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Research Support, Non-U.S. Gov't
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Review
MeSH terms
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Animals
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Basement Membrane / cytology
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Basement Membrane / metabolism*
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Cell Differentiation
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Dystroglycans / metabolism
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Endothelium, Vascular / cytology
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Endothelium, Vascular / metabolism*
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Extracellular Matrix / genetics
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Extracellular Matrix / metabolism
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Fluorescent Antibody Technique
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Humans
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Laminin / genetics
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Laminin / metabolism*
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Mechanotransduction, Cellular
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Mice
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Muscle Contraction
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Muscle, Smooth, Vascular / blood supply
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Muscle, Smooth, Vascular / cytology
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Muscle, Smooth, Vascular / metabolism
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Myocytes, Smooth Muscle / cytology
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Myocytes, Smooth Muscle / metabolism
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Phenotype
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Protein Isoforms / metabolism
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Receptors, Laminin / genetics
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Receptors, Laminin / metabolism
Substances
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Lama4 protein, mouse
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Laminin
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Protein Isoforms
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Receptors, Laminin
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laminin alpha5
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Dystroglycans