scholarly journals Interleukin-4 and Interleukin- 13 Act on Glomerular Visceral Epithelial Cells

2000 ◽  
Vol 11 (3) ◽  
pp. 413-422
Author(s):  
JOSÉ G. VAN DEN BERG ◽  
JAN ATEN ◽  
M. ANWAR CHAND ◽  
NIKE CLAESSEN ◽  
LISETTE DIJKINK ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Epithelial Cells ◽  
Electrical Resistance ◽  
Structural Changes ◽  
Cell Structure ◽  
Short Circuit ◽  
Transepithelial Electrical Resistance ◽  
Interleukin 4 ◽  
Direct Effects ◽  
Direct Role

Abstract. In minimal change nephrosis (MCN), proteinuria is associated with structural changes of the glomerular visceral epithelial cells (GVEC). The occurrence of MCN has been associated with T-helper2 lymphocyte-dependent conditions. To examine a direct role for type 2 cytokines in GVEC injury, the expression of interleukin (IL)-4/IL-13 receptors by GVEC and direct effects of IL-4 and IL-13 on GVEC were studied. Reverse transcription-PCR showed that isolated human and rat glomeruli and cultured human and rat GVEC expressed mRNA for IL-4Rα, IL-13Rα1, and IL-13Rα2. Protein expression of IL-4Rα and IL-13Rα2 by GVEC in human kidney biopsies and by cultured human GVEC was detected by immunohistochemistry. Western blotting demonstrated phosphorylation of STAT6 in cultured GVEC upon incubation with IL-4 or IL-13. This indicated signal transduction via the heterodimeric receptor complex IL-4R2, which is composed of the IL-4Rα and the IL-13Rα1. Direct effects on GVEC function were examined in monolayer experiments. IL-4 and IL-13 dose-dependently decreased transepithelial electrical resistance of monolayers of rat GVEC to approximately 30 and 40% of baseline values, respectively. The transepithelial electrical resistance decrease was associated with a significant increase in short-circuit current, whereas no changes were observed in the transmonolayer flux of the macromolecules horseradish peroxidase (molecular weight, 44 kD) and 14C-mannitol (molecular weight, 182 Da). No changes in cell structure were observed with electron microscopy. It is concluded that by binding to specific IL-4/IL-13 receptors, IL-4 and IL-13 can exert specific effects on GVEC function, which could be of pathogenetic relevance for glomerular injury in MCN.

Transport properties of toad kidney epithelia in culture

1981 ◽  
Vol 241 (3) ◽  
pp. C154-C159 ◽  
Author(s):  
F. M. Perkins ◽  
J. S. Handler
Keyword(s):  
Electrical Resistance ◽  
Hormonal Regulation ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Transepithelial Electrical Resistance ◽  
Apical Surface ◽  
Osmotic Water ◽  
Sodium Flux ◽  
Regulation Of Transport ◽  
Osmotic Water Flow

The characteristics of a continuous line of toad kidney epithelial cells (A6) are described. These cells form a monolayer epithelium of high transepithelial electrical resistance (about 5,000 omega . cm2). The cells generate a transepithelial potential difference (apical surface negative) of about 9 mV. The short-circuit current is equivalent to net sodium flux. Net sodium flux is stimulated by aldosterone and by analogues of cAMP. The stimulation is readily reversible. Neither urea permeability nor osmotic water flow is altered by analogues of cAMP. Amiloride eliminates 90% of the short-circuit current. Thus A6 cells form an epithelium with several differentiated properties including hormonal regulation of transport.

scholarly journals NSP4 Enterotoxin of Rotavirus Induces Paracellular Leakage in Polarized Epithelial Cells

2001 ◽  
Vol 75 (3) ◽  
pp. 1540-1546 ◽  
Author(s):  
Farideh Tafazoli ◽  
Carl Q. Zeng ◽  
Mary K. Estes ◽  
Karl-Erik Magnusson ◽  
Lennart Svensson
Keyword(s):  
Epithelial Cells ◽  
Tight Junction ◽  
Electrical Resistance ◽  
Fluorescein Isothiocyanate ◽  
Transepithelial Electrical Resistance ◽  
Permeability Barrier ◽  
Filamentous Actin ◽  
Specific Effects ◽  
Polarized Epithelia ◽  
Polarized Epithelial Cells

ABSTRACT The nonstructural NSP4 protein of rotavirus has been described as the first viral enterotoxin. In this study we have examined the effect of NSP4 on polarized epithelial cells (MDCK-1) grown on permeable filters. Apical but not basolateral administration of NSP4 was found to cause a reduction in the transepithelial electrical resistance, redistribution of filamentous actin, and an increase in paracellular passage of fluorescein isothiocyanate-dextran. Significant effects on transepithelial electrical resistance were noted after a 20- to 30-h incubation with 1 nmol of NSP4. Most surprisingly, the epithelium recovered its original integrity and electrical resistance upon removal of NSP4. Preincubation of nonconfluent MDCK-1 cells with NSP4 prevented not only development of a permeability barrier but also lateral targeting of the tight-junction-associated Zonula Occludens-1 (ZO-1) protein. Taken together, these data indicate new and specific effects of NSP4 on tight-junction biogenesis and show a novel effect of NSP4 on polarized epithelia.

Protamine increases the permeability of cultured epithelial monolayers

1990 ◽  
Vol 68 (1) ◽  
pp. 220-227 ◽  
Author(s):  
M. W. Peterson ◽  
D. Gruenhaupt
Keyword(s):  
Actin Cytoskeleton ◽  
Electrical Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Transepithelial Electrical Resistance ◽  
Apical Surface ◽  
Type Ii ◽  
Epithelial Monolayers ◽  
Organ Specific ◽  
Darby Canine Kidney

Polycations, including protamine, have been reported to decrease the barrier integrity of cultured rat pulmonary type II epithelial monolayers. In contrast, protamine has been reported to increase the transepithelial electrical resistance of gallbladder epithelium. The present study was done using Madin Darby canine kidney epithelial cells (MDCK) to determine whether the effect of protamine on type II epithelial monolayers was species or organ specific or was dependent on the presence of nonepithelial cells and to investigate the effect of protamine on the actin cytoskeleton. Exposure of MDCK monolayers to protamine resulted in decreased transepithelial electrical resistance (Rt), increased short-circuit current (Isc) across the monolayers, and increased mannitol permeability (Pmann) of the monolayers. The decrease in Rt and increase in Isc was seen only after the addition of protamine to the apical surface of the cells. The importance of charge in this action was supported by the fact that exposure of the monolayer to the polycation poly-L-lysine also resulted in increased Pmann, and both the decreased Rt and increased Pmann seen after the addition of protamine were prevented if the monolayers were exposed in the presence of the polyanions heparin or sulfated dextran. The increase in Pmann appeared to be the result of increased permeability in the paracellular pathway, because increased mannitol uptake by the cells represented only a fraction of the increase in Pmann. Subtle changes in the actin cytoskeleton were seen after exposure of the monolayers to protamine.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals A microfluidic bioreactor with integrated transepithelial electrical resistance (TEER) measurement electrodes for evaluation of renal epithelial cells

2010 ◽  
Vol 107 (4) ◽  
pp. 707-716 ◽  
Author(s):  
Nicholas Ferrell ◽  
Ravi R. Desai ◽  
Aaron J. Fleischman ◽  
Shuvo Roy ◽  
H. David Humes ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Electrical Resistance ◽  
Transepithelial Electrical Resistance ◽  
Renal Epithelial Cells

Endothelin stimulates chloride secretion across canine tracheal epithelium

1991 ◽  
Vol 261 (2) ◽  
pp. L188-L194 ◽  
Author(s):  
P. I. Plews ◽  
Z. A. Abdel-Malek ◽  
C. A. Doupnik ◽  
G. D. Leikauf
Keyword(s):  
Epithelial Cells ◽  
Short Circuit ◽  
Second Messengers ◽  
Short Circuit Current ◽  
Chloride Secretion ◽  
Tracheal Epithelium ◽  
Membrane Phospholipids ◽  
Cl Secretion ◽  
Tracheal Epithelial Cells ◽  
Tracheal Epithelial

The endothelins (ET) are a group of isopeptides produced by a number of cells, including canine tracheal epithelial cells. Because these compounds are endogenous peptides that may activate eicosanoid metabolism, we investigated the effects of ET on Cl secretion in canine tracheal epithelium. Endothelin 1 (ET-1) was found to produce a dose-dependent change in short-circuit current (Isc) that increased slowly and reached a maximal value within 10-15 min. When isopeptides of ET were compared, 300 nM ET-1 and ET-2 produced comparable maximal increases in Isc, whereas ET-3 produced smaller changes in Isc (half-maximal concentrations of 2.2, 7.2, and 10.4 nM, respectively). Ionic substitution of Cl with nontransported anions, iodide and gluconate, reduced ET-1-induced changes in Isc. Furthermore, the response was inhibited by the NaCl cotransport inhibitor, furosemide. In paired tissues, ET-1 significantly increased mucosal net 36Cl flux without significant effect on 22Na flux. The increase in Isc induced by ET was diminished by pretreatment with indomethacin. The second messengers mediating the increase in Isc were investigated in cultured canine tracheal epithelial cells. ET-1 stimulated the release of [3H]arachidonate from membrane phospholipids, increased intracellular Ca2+ (occasionally producing oscillations), and increased adenosine 3',5'-cyclic monophosphate accumulation. The latter was diminished by indomethacin. Thus ET is a potent agonist of Cl secretion (with the isopeptides having the following potency: ET-1 greater than or equal to ET-2 greater than ET-3) and acts, in part, through a cyclooxygenase-dependent mechanism.

scholarly journals High throughput transepithelial electrical resistance (TEER) measurements on perfused membrane-free epithelia

Lab on a Chip ◽  
2021 ◽  
Author(s):  
A. Nicolas ◽  
F. Schavemaker ◽  
K. Kosim ◽  
D. Kurek ◽  
M. Haarmans ◽  
...  
Keyword(s):  
High Throughput ◽  
Electrical Resistance ◽  
Drug Exposure ◽  
Transepithelial Electrical Resistance ◽  
Ease Of Use ◽  
Inflammatory Processes

We present an instrument for simultaneously measuring TEER in up to 80 perfused epithelial tubules on an OrganoPlate. The sensitivity, speed and ease of use enables screening of tubules during formation, drug exposure and inflammatory processes.

scholarly journals Interleukin 4 Production by Human Amnion Epithelial Cells and Regulation of its Activity by Glycosaminoglycan Binding1

1995 ◽  
Vol 52 (4) ◽  
pp. 839-847 ◽  
Author(s):  
Catherine A. Jones ◽  
Keryn A. Williams ◽  
John J. Finlay-Jones ◽  
Prue H. Hart
Keyword(s):  
Epithelial Cells ◽  
Interleukin 4 ◽  
Human Amnion ◽  
Amnion Epithelial Cells
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