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Urothelial plaque formation in post-Golgi compartmentsHudoklin, Samo, biolog ...Urothelial plaques are specialized membrane domains in urothelial superficial (umbrella) cells, composed of highly ordered uroplakin particles. We investigated membrane compartments involved in the ... formation of urothelial plaques in mouse umbrella cells. The Golgi apparatus did not contain uroplakins organized into plaques. In the post-Golgi region, three distinct membrane compartments containing uroplakins were characterized: i) Small rounded vesicles, located close to the Golgi apparatus, were labelled weakly with anti-uroplakin antibodies and they possessed no plaques; we termed them "uroplakin-positive transporting vesicles" (UPTVs). ii) Spherical-to-flattenedvesicles, termed "immature fusiform vesicles" (iFVs), were uroplakin-positive in their central regions and contained small urothelial plaques. iii) Flattened "mature fusiform vesicles" (mFVs) containedlarge plaques, which were densely labelled with anti-uroplakin antibodies. Endoytotic marker horseradish peroxidase was not found in these post-Golgi compartments. We propose a detailed model of de novo urothelial plaque formation in post-Golgi compartments: UPTVs carrying individual 16-nm particles detach from the Golgi apparatus and subsequently fuse into iFV. Concentration of 16-nm particles into plaques and removal of uroplakin-negative membranes takes place in iFVs. With additional fusions and buddings, iFVs mature into mFVs, each carrying two urothelial plaques toward the apical surface of the umbrella cell.Vir: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 6, issue 8, 2011, str. e23636)Vrsta gradiva - e-članekLeto - 2011Jezik - angleškiCOBISS.SI-ID - 28976345
Avtor
Hudoklin, Samo, biolog |
Jezernik, Kristijan |
Neumüller, Josef |
Pavelka, Margit, 1945- |
Romih, Rok
Teme
Bladder |
Ultrastructure |
Urothelium |
Cell Compartmentation |
Cell Membrane |
Golgi Apparatus |
Microscopy, Immunoelectron |
Fluorescent Antibody Technique |
Horseradish Peroxidase |
Freeze Fracturing |
Mice, Inbred C57bl |
Urotelij |
Celična membrana |
Golgijev aparat |
Sečni mehur |
Celični oddelki |
Fluorescentna tehnika za protitelesa |
Hrenova peroksidaza |
Miši seva C57BL |
Mikroskopija imunoelektronska |
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Baze podatkov, v katerih je revija indeksirana
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Hudoklin, Samo, biolog | 25780 |
Jezernik, Kristijan | 05277 |
Neumüller, Josef | ![]() |
Pavelka, Margit, 1945- | ![]() |
Romih, Rok | 11654 |
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