| 1. |
- Johansson, B, et al.
(författare)
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Intermediate filament proteins in adult human arteries.
- 1997
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Ingår i: Anatomical Record. - 0003-276X .- 1097-0185. ; 247:4, s. 439-48
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The cytoskeleton of cells in blood vessel walls contains desmin, vimentin, and cytokeratins. The distribution of these proteins in human vessels is not fully known. We have mapped the distribution of intermediate filament proteins in human arterial walls.METHODS: Monoclonal antibodies targeted at the intermediate filament proteins desmin, vimentin, and cytokeratins were used, and the distribution of these proteins was studied by immunohistochemistry.RESULTS: In the muscular arteries, most smooth muscle cells in the media expressed both desmin and vimentin; in the elastic arteries, the proportion of desmin-labelled cells was lower and preferentially located to the periphery of the media. In general, the desmin immunoreactivity within the intima was weak, but some smooth muscle cells and smooth muscle cells in the musculoelastic layer showed strong immunoreactivity. The vasa vasorum exhibited a heterogeneous desmin-labelling pattern. The vimentin antibodies labelled the endothelium and showed a heterogeneous staining pattern in the other layers of the arterial wall. Cytokeratin was detected in occasional cells in the media of muscular arteries, in many adluminal cells and cell clusters in the coronary intima, and in smooth muscle cells in the media of the elastic arteries.CONCLUSIONS: Vimentin is widely distributed in vascular smooth muscle cells, whereas the distribution of desmin and cytokeratin varies. Each artery studied had an intermediate filament pattern typical for the anatomical location. There were no interindividual variations in the distribution of intermediate filament proteins.
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| 2. |
- Johansson, B, et al.
(författare)
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Intermediate filament proteins in developing human arteries.
- 1999
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Ingår i: Anatomy and Embryology. - 0340-2061 .- 1432-0568. ; 199:3, s. 225-31
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Tidskriftsartikel (refereegranskat)abstract
- The distribution of intermediate filament proteins in adult human blood vessels and in human fetal elastic arteries is relatively well-known. However, the distribution of these proteins in the course from neonate to adult has not been established. In this investigation, human postnatal arteries were studied with immunohistochemistry, using antibodies targeted on the intermediate filament proteins desmin, vimentin and cytokeratins 8, 18 and 19. Vimentin was present in most smooth muscle cells in all vessels and at all ages. The proportions of desmin-expressing cells increased in the elastic arteries during the first year of life and was higher in the pulmonary trunk than in the aorta. In the muscular arteries, the proportion of desmin-labelled cells increased in the coronary and the deep femoral arteries, but remained constant in the renal and the cerebral arteries. Cytokeratins were detected in the pulmonary trunk earlier than in the aorta. Cytokeratins were present throughout the wall of the ductus arteriosus, but desmin was present only in some cells. Thus, there are postnatal changes in the distribution of intermediate filament proteins in the elastic arteries and in some muscular arteries, whereas the intermediate filament pattern remains unchanged in other muscular arteries.
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| 3. |
- Johansson, B, et al.
(författare)
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Smoothelin and intermediate filament proteins in human aortocoronary saphenous vein by-pass grafts.
- 1999
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Ingår i: The Histochemical Journal. - 0018-2214 .- 1573-6865. ; 31:11, s. 723-7
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this immunohistochemical investigation was to study the distribution of the novel cytoskeletal protein smoothelin and the intermediate filament proteins vimentin and desmin in normal human great saphenous vein and in human aortocoronary by-pass vein grafts. Smoothelin was present in most smooth muscle cells in the media of the native vein. In the neointima of the vein grafts that had been in situ for three months or more, smoothelin was, in general, present only in few smooth muscle cells. Desmin was distributed in the same pattern as smoothelin in the native great saphenous vein. When desmin and smoothelin were present in the neointima, smoothelin was detected in more cells than desmin. Vimentin was present in most cells in all wall layers of both the native saphenous vein and the vein grafts. Vascular smooth muscle cells containing vimentin but not desmin or smoothelin are the principal cells in the neointima of human aortocoronary vein grafts. In some grafts, however, all three cytoskeletal proteins were detected in the neointima. The distribution of smoothelin and desmin in aortocoronary vein grafts support the postulate that these proteins are expressed mainly in the contractile smooth muscle cell phenotype.
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| 4. |
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| 5. |
- Thornell, L E, et al.
(författare)
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Intermediate filament and associated proteins in the human heart : an immunofluorescence study of normal and pathological hearts.
- 1984
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Ingår i: European Heart Journal. - 0195-668X .- 1522-9645. ; 5 Suppl F, s. 231-41
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Tidskriftsartikel (refereegranskat)abstract
- The cytoskeleton of human ventricular myocardium in normal and pathological hearts has been analysed with immunocytochemical techniques. Specific antibodies against the intermediate filament proteins desmin (Mr 55 000) and vimentin (Mr 58 000) and antibodies against two cytoskeleton-associated proteins, a spectrin-like protein (Mr 230 000) and vinculin (Mr 130 000), have been used. We show that desmin is localized in the myocytes as an intermyofibrillar lattice at the Z disk level of the myofibrils, and at the intercalated disks. The spectrin-like protein is localized as a transverse striated pattern interlinked with fine longitudinal strands in the subplasmalemmal region of the myocytes. Vinculin is abundant in the intercalated disks and in myotendinous junctions but occurs also at the peripheral sarcolemma in the form of a regular repeat of dots and of fine bar-like extensions into the cytoplasm from the dots. These patterns were observed both in normal and in abnormal hearts, but a number of altered patterns in pathological myocytes were also seen. It is concluded that the intermediate filament system has important implications in the structural function of normal and abnormal hearts but that further studies are needed to elucidate how the different components are related to each other and how they are influenced by different disease processes.
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