scholarly journals Similar uptake but different trafficking and escape routes of reovirus virions and infectious subvirion particles imaged in polarized Madin–Darby canine kidney cells

2013 ◽  
Vol 24 (8) ◽  
pp. 1196-1207 ◽  
Author(s):  
Steeve Boulant ◽  
Megan Stanifer ◽  
Comert Kural ◽  
David K. Cureton ◽  
Ramiro Massol ◽  
...  
Keyword(s):  
Live Cell Imaging ◽  
Cell Imaging ◽  
Live Cell ◽  
Endocytic Pathway ◽  
Cell Entry ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Darby Canine Kidney ◽  
Canine Kidney

Polarized epithelial cells that line the digestive, respiratory, and genitourinary tracts form a barrier that many viruses must breach to infect their hosts. Current understanding of cell entry by mammalian reovirus (MRV) virions and infectious subvirion particles (ISVPs), generated from MRV virions by extracellular proteolysis in the digestive tract, are mostly derived from in vitro studies with nonpolarized cells. Recent live-cell imaging advances allow us for the first time to visualize events at the apical surface of polarized cells. In this study, we used spinning-disk confocal fluorescence microscopy with high temporal and spatial resolution to follow the uptake and trafficking dynamics of single MRV virions and ISVPs at the apical surface of live polarized Madin–Darby canine kidney cells. Both types of particles were internalized by clathrin-mediated endocytosis, but virions and ISVPs exhibited strikingly different trafficking after uptake. While virions reached early and late endosomes, ISVPs did not and instead escaped the endocytic pathway from an earlier location. This study highlights the broad advantages of using live-cell imaging combined with single-particle tracking for identifying key steps in cell entry by viruses.

scholarly journals Cdc42-dependent Modulation of Tight Junctions and Membrane Protein Traffic in Polarized Madin-Darby Canine Kidney Cells

2001 ◽  
Vol 12 (8) ◽  
pp. 2257-2274 ◽  
Author(s):  
Raul Rojas ◽  
Wily G. Ruiz ◽  
Som-Ming Leung ◽  
Tzuu-Shuh Jou ◽  
Gerard Apodaca
Keyword(s):  
Tight Junction ◽  
Basolateral Membrane ◽  
Dominant Negative ◽  
Endocytic Pathway ◽  
Kidney Cells ◽  
Cellular Polarity ◽  
Membrane Domain ◽  
Madin Darby Canine Kidney ◽  
Darby Canine Kidney ◽  
Canine Kidney

Polarized epithelial cells maintain the asymmetric composition of their apical and basolateral membrane domains by at least two different processes. These include the regulated trafficking of macromolecules from the biosynthetic and endocytic pathway to the appropriate membrane domain and the ability of the tight junction to prevent free mixing of membrane domain-specific proteins and lipids. Cdc42, a Rho family GTPase, is known to govern cellular polarity and membrane traffic in several cell types. We examined whether this protein regulated tight junction function in Madin-Darby canine kidney cells and pathways that direct proteins to the apical and basolateral surface of these cells. We used Madin-Darby canine kidney cells that expressed dominant-active or dominant-negative mutants of Cdc42 under the control of a tetracycline-repressible system. Here we report that expression of dominant-active Cdc42V12 or dominant-negative Cdc42N17 altered tight junction function. Expression of Cdc42V12 slowed endocytic and biosynthetic traffic, and expression of Cdc42N17 slowed apical endocytosis and basolateral to apical transcytosis but stimulated biosynthetic traffic. These results indicate that Cdc42 may modulate multiple cellular pathways required for the maintenance of epithelial cell polarity.

scholarly journals Transepithelial transport of a viral membrane glycoprotein implanted into the apical plasma membrane of Madin-Darby canine kidney cells. II. Immunological quantitation.

1983 ◽  
Vol 97 (3) ◽  
pp. 638-643 ◽  
Author(s):  
M Pesonen ◽  
K Simons
Keyword(s):  
Plasma Membrane ◽  
G Protein ◽  
Binding Assay ◽  
Protein A ◽  
Apical Plasma Membrane ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Darby Canine Kidney ◽  
Canine Kidney

The envelope of vesicular stomatitis virus was fused with the apical plasma membrane of Madin-Darby canine kidney cells by low pH treatment. The fate of the implanted G protein was then followed using a protein A-binding assay, which was designed to quantitate the amount of G protein in the apical and the basolateral membranes. The implanted G protein was rapidly internalized at 31 degrees C, whereas at 10 degrees C no uptake was observed. Already after 15 min at 31 degrees C, a fraction of the G protein could be detected at the basolateral membrane. After 60 min 25-48% of the G protein was basolateral as measured by the protein A-binding assay. At the same time, 25-33% of the implanted G protein was detected at the apical membrane. Internalization of G protein was not affected by 20 mM ammonium chloride or by 10 microM monensin. However, the endocytosed G protein accumulated in intracellular vacuoles and redistribution back to the plasma membrane was inhibited. We conclude that the implanted G protein was rapidly internalized from the apical surface of Madin-Darby canine kidney cells and a major fraction was routed to the basolateral domain.

Polarity of endogenous and exogenous glycosyl-phosphatidylinositol-anchored membrane proteins in Madin-Darby canine kidney cells

1990 ◽  
Vol 96 (1) ◽  
pp. 143-149
Author(s):  
J.M. Wilson ◽  
N. Fasel ◽  
J.P. Kraehenbuhl
Keyword(s):  
Plasma Membrane ◽  
Common Mechanism ◽  
Apical Plasma Membrane ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Transfected Cells ◽  
Glycosyl Phosphatidylinositol ◽  
Darby Canine Kidney ◽  
Canine Kidney

Madin-Darby canine kidney cells (MDCK) were transfected with a cDNA encoding the glycosyl-phosphatidylinositol (GPI)-anchored protein mouse Thy-1 in order to study the steady-state surface distribution of exogenous and endogenous GPI-linked proteins. Immunofluorescence of transfected cells grown on collagen-coated coverslips showed that expression of Thy-1 was variable throughout the epithelium, with some cells expressing large amounts of Thy-1 adjacent to very faintly staining cells. Selective surface iodination of cells grown on collagen-coated or uncoated transwell filters followed by immunoprecipitation of Thy-1 demonstrated that all the Thy-1 was present exclusively in the apical plasma membrane. Although cells grown on uncoated filters had much smaller amounts of Thy-1, it was consistently localized on the apical surfaces. Immunofluorescent localization of Thy-1 on 1 micron frozen sections of filter-grown cells demonstrated that all the Thy-1 was on the apical surface and there was no detectable intracellular pool. Phosphatidylinositol-specific phospholipase C digestion of intact iodinated monolayers released Thy-1 only into the apical medium, indicating that Thy-1 was processed normally in transfected cells and was anchored by a GPI-tail. In agreement with previous findings, endogenous GPI-linked proteins were found only on the apical plasma membrane. These results suggest that there is a common mechanism for sorting and targeting of GPI-linked proteins in polarized epithelial cells.

scholarly journals Intracellular transport of influenza virus hemagglutinin to the apical surface of Madin-Darby canine kidney cells.

1984 ◽  
Vol 98 (1) ◽  
pp. 308-319 ◽  
Author(s):  
E Rodriguez-Boulan ◽  
K T Paskiet ◽  
P J Salas ◽  
E Bard
Keyword(s):  
Influenza Virus ◽  
Golgi Apparatus ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Surface Appearance ◽  
Influenza Virus Hemagglutinin ◽  
Intracellular Pathway ◽  
Darby Canine Kidney ◽  
Canine Kidney

The intracellular pathway followed by the influenza virus hemagglutinin (HA) to the apical surface of Madin-Darby canine kidney cells was studied by radioimmunoassay, immunofluorescence, and immunoelectron microscopy. To synchronize the migration, we used a temperature-sensitive mutant of influenza WSN, ts61, which, at the nonpermissive temperature, 39.5 degrees C, exhibits a defect in the HA that prevents its exit from the endoplasmic reticulum. Upon transfer to permissive temperature, 32 degrees C, the HA appeared in the Golgi apparatus after 10 min, and on the apical surface after 30-40 min. In the presence of cycloheximide, the expression was not inhibited, indicating that the ts defect is reversible; a wave of HA migrated to the cell surface, where it accumulated with a half time of 60 min. After passage through the Golgi apparatus the HA was detected in a population of smooth vesicles, about twice the size of coated vesicles, located in the apical half of the cytoplasm. These HA-containing vesicles did not react with anti-clathrin antibodies. Monensin (10 microM) delayed the surface appearance of HA by 2 h, but not the transport to the Golgi apparatus. Incubation at 20 degrees C retarded the migration to the Golgi apparatus by approximately 30 min and blocked the surface appearance by acting at a late stage in the intracellular pathway, presumably at the level of the post-Golgi vesicles. The initial appearance of HA on the apical surface was in the center; no preference was observed for the tight-junctional regions.

scholarly journals Polarized delivery of viral glycoproteins to the apical and basolateral plasma membranes of Madin-Darby canine kidney cells infected with temperature-sensitive viruses.

1985 ◽  
Vol 100 (1) ◽  
pp. 136-151 ◽  
Author(s):  
M J Rindler ◽  
I E Ivanov ◽  
H Plesken ◽  
D D Sabatini
Keyword(s):  
Plasma Membrane ◽  
G Protein ◽  
Plasma Membranes ◽  
Temperature Sensitive ◽  
Kidney Cells ◽  
Apical Surface ◽  
Nonpermissive Temperature ◽  
Madin Darby Canine Kidney ◽  
Darby Canine Kidney ◽  
Canine Kidney

The intracellular route followed by viral envelope glycoproteins in polarized Madin-Darby canine kidney cells was studied by using temperature-sensitive mutants of vesicular stomatitis virus (VSV) and influenza, in which, at the nonpermissive temperature (39.5 degrees C), the newly synthesized glycoproteins (G proteins) and hemagglutinin (HA), respectively, are not transported out of the endoplasmic reticulum. After infection with VSV and incubation at 39.5 degrees C for 4-5 h, synchronous transfer of G protein to the plasma membrane was initiated by shifting to the permissive temperature (32.5 degrees C). Immunoelectron microscopy showed that under these conditions the protein moved to the Golgi apparatus and from there directly to a region of the lateral plasma membrane near this organelle. G protein then seemed to diffuse progressively to basal regions of the cell surface and, only after it had accumulated in the basolateral domain, it began to appear on the apical surface near the intercellular junctions. The results of these experiments indicate that the VSV G protein must be sorted before its arrival at the cell surface, and suggest that passage to the apical domain occurs only late in infection when tight junctions are no longer an effective barrier. In complementary experiments, using the temperature-sensitive mutant of influenza, cultures were first shifted from the nonpermissive temperature (39.5 degrees C) to 18.5 degrees C, to allow entrance of the glycoprotein into the Golgi apparatus (see Matlin, K.S., and K. Simons, 1983, Cell, 34:233-243). Under these conditions HA accumulated in Golgi stacks and vesicles but did not reach the plasma membrane. When the temperature was subsequently shifted to 32.5 degrees C, HA rapidly appeared in discrete regions of the apical surface near, and often directly above, the Golgi elements, and later diffused throughout this surface. To ensure that the anti-HA antibodies had access to lateral domains, monolayers were treated with a hypertonic medium to dilate the intercellular spaces. Some labeling was then observed in the lateral plasma membranes soon after the shift, but this never increased beyond 1.0 gold particle/micron, whereas characteristic densities of labeling in apical surfaces soon became much higher (approximately 10 particles/micron). Our results suggest that the bulk of HA follows a direct pathway leading from the Golgi to regions of the apical surface close to trans-Golgi cisternae.

scholarly journals Characterization of a 36,000-dalton protein from the surface of Madin-Darby canine kidney cells involved in cell attachment and spreading.

1985 ◽  
Vol 100 (6) ◽  
pp. 2001-2007 ◽  
Author(s):  
M Sabanero ◽  
A Gonzalez-Robles ◽  
I Meza
Keyword(s):  
Tight Junctions ◽  
Cell Attachment ◽  
External Surface ◽  
Polyclonal Antibodies ◽  
Inhibitory Effect ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Darby Canine Kidney ◽  
Canine Kidney

We have identified and immunochemically characterized a 36,000-dalton membrane glycoprotein from Madin-Darby canine kidney cells. This protein is surface-labeled by lactoperoxidase-mediated iodination and metabolically labeled by [35S]methionine. It binds to Concanavalin A and incorporates 2-D-3H-mannose residues, thus indicating it is a glycoprotein. Rabbit polyclonal antibodies against this protein evenly decorate the external surface of trypsinized, unpolarized cells. The external apical surface of confluent monolayers, grown under culture conditions in which the tight junctions are closed and the cells have acquired polarity, is also evenly stained. The basolateral aspects of the external surface are stained only when the tight junctions are opened by removal of Ca++ or when the antibody has access to the monolayer from the basal side, which indicates an even distribution of this antigen on the surface of polarized cells. The antibody has no inhibitory effect on the opening and resealing of tight junctions in dense cultures, but does inhibit the attachment and spreading of cells on a substrate, which then blocks the establishment of a confluent functional monolayer.

N-glycans as apical targeting signals in polarized epithelial cells.

2005 ◽  
Vol 72 ◽  
pp. 39-45 ◽  
Author(s):  
Paula Urquhart ◽  
Susan Pang ◽  
Nigel M. Hooper
Keyword(s):  
Epithelial Cells ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Targeting Signals ◽  
Polarized Epithelial Cells ◽  
Apical Sorting ◽  
Darby Canine Kidney ◽  
Canine Kidney

MDCK (Madin-Darby canine kidney) cells represent a good model of polarized epithelium to investigate the signals involved in the apical targeting of proteins. As reported previously, GPI (glycosylphosphatidylinositol) anchors mediate the apical sorting of proteins in polarized epithelial cells through their interaction with lipid rafts. However, using a naturally N-glycosylated and GPI-anchored protein, we found that the GPI anchor does not influence the targeting of the protein. It is, in fact, the N-glycans that signal the protein to the apical surface. In the present review, the role of N-glycans and GPI anchors as apical signals is discussed along with the putative mechanisms involved.

scholarly journals MAL regulates clathrin-mediated endocytosis at the apical surface of Madin–Darby canine kidney cells

2003 ◽  
Vol 163 (1) ◽  
pp. 155-164 ◽  
Author(s):  
Fernando Martín-Belmonte ◽  
José A. Martínez-Menárguez ◽  
Juan F. Aranda ◽  
José Ballesta ◽  
María C. de Marco ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Mdck Cells ◽  
Microscopic Analysis ◽  
Time Lapse ◽  
Kidney Cells ◽  
Apical Surface ◽  
Madin Darby Canine Kidney ◽  
Apical Vesicles ◽  
Darby Canine Kidney ◽  
Canine Kidney

MAL is an integral protein component of the machinery for apical transport in epithelial Madin–Darby canine kidney (MDCK) cells. To maintain its distribution, MAL cycles continuously between the plasma membrane and the Golgi complex. The clathrin-mediated route for apical internalization is known to differ from that at the basolateral surface. Herein, we report that MAL depends on the clathrin pathway for apical internalization. Apically internalized polymeric Ig receptor (pIgR), which uses clathrin for endocytosis, colocalized with internalized MAL in the same apical vesicles. Time-lapse confocal microscopic analysis revealed cotransport of pIgR and MAL in the same endocytic structures. Immunoelectron microscopic analysis evidenced colabeling of MAL with apically labeled pIgR in pits and clathrin-coated vesicles. Apical internalization of pIgR was abrogated in cells with reduced levels of MAL, whereas this did not occur either with its basolateral entry or the apical internalization of glycosylphosphatidylinositol-anchored proteins, which does not involve clathrin. Therefore, MAL is critical for efficient clathrin-mediated endocytosis at the apical surface in MDCK cells.

scholarly journals SpecificN-Glycans Direct Apical Delivery of Transmembrane, but Not Soluble or Glycosylphosphatidylinositol-anchored Forms of Endolyn in Madin-Darby Canine Kidney Cells

2004 ◽  
Vol 15 (3) ◽  
pp. 1407-1416 ◽  
Author(s):  
Beth A. Potter ◽  
Gudrun Ihrke ◽  
Jennifer R. Bruns ◽  
Kelly M. Weixel ◽  
Ora A. Weisz
Keyword(s):  
Transmembrane Protein ◽  
Site Directed Mutagenesis ◽  
Kidney Cells ◽  
Apical Surface ◽  
Glycosidase Inhibitors ◽  
Madin Darby Canine Kidney ◽  
Reporter Protein ◽  
Apical Sorting ◽  
Darby Canine Kidney ◽  
Canine Kidney

The sialomucin endolyn is a transmembrane protein with a unique trafficking pattern in polarized Madin-Darby canine kidney cells. Despite the presence of a cytoplasmic tyrosine motif that, in isolation, is sufficient to mediate basolateral sorting of a reporter protein, endolyn predominantly traverses the apical surface en route to lysosomes. Apical delivery of endolyn is disrupted in tunicamycin-treated cells, implicating a role for N-glycosylation in apical sorting. Site-directed mutagenesis of endolyn's eight N-glycosylation sites was used to identify two N-glycans that seem to be the major determinants for efficient apical sorting of the protein. In addition, apical delivery of endolyn was disrupted when terminal processing of N-glycans was blocked using glycosidase inhibitors. Missorting of endolyn occurred independently of the presence or absence of the basolateral sorting signal, because apical delivery was also inhibited by tunicamycin when the cytoplasmic tyrosine motif was mutated. However, we found that apical secretion of a soluble mutant of endolyn was N-glycan independent, as was delivery of glycosylphosphatidylinositol-anchored endolyn. Thus, specific N-glycans are only essential for the apical sorting of transmembrane endolyn, suggesting fundamental differences in the mechanisms by which soluble, glycosylphosphatidylinositol-anchored, and transmembrane proteins are sorted.

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