scholarly journals Histochemical detection of carbonic anhydrase with diemthylaminonaphthalene-5-sulfonamide.

1979 ◽  
Vol 27 (7) ◽  
pp. 1103-1107 ◽  
Author(s):  
C Pochhammer ◽  
P Dietsch ◽  
P R Siegmund
Keyword(s):  
Carbonic Anhydrase ◽  
Proximal Tubule ◽  
Specific Method ◽  
Proximal Tubule Cells ◽  
Histochemical Detection ◽  
Tubule Cells ◽  
The Difference

A new specific method for the detection of carbonic anhydrase, EC 4.2.1.1, in tissues is described. The reaction of carbonic anhydrase with dimethylaminonaphthalene-5-sulfonamide (DNSA) forms a highly fluorescent complex. The specificity of the method is proved by the quenching of this fluorescence with ethoxzolamide (6-ethoxybenzothiazole-5-sulfonamide). The difference in the wavelength makes it possible to absorb the fluorescence of the unbound dimethylaminonaphthalene-5-sulfonamide by filters. Kidney, proventriculus, and bone from chicken have been examined. Carbonic anhydrase has been detected in the cytoplasm of the columnar lining cells, proximal tubule cells, and osteoclasts.

scholarly journals Porcine myosin-VI: characterization of a new mammalian unconventional myosin.

1994 ◽  
Vol 127 (2) ◽  
pp. 425-440 ◽  
Author(s):  
T Hasson ◽  
M S Mooseker
Keyword(s):  
Proximal Tubule ◽  
Cell Line ◽  
Actin Binding ◽  
Proximal Tubule Cell ◽  
Myosin Vi ◽  
Proximal Tubule Cells ◽  
Unconventional Myosin ◽  
Tubule Cells ◽  
The Difference

We have cloned a new mammalian unconventional myosin, porcine myosin-VI from the proximal tubule cell line, LLC-PK1 (CL4). Porcine myosin-VI is highly homologous to Drosophila 95F myosin heavy chain, and together these two myosins comprise a sixth class of myosin motors. Myosin-VI exhibits ATP-sensitive actin-binding activities characteristic of myosins, and it is associated with a calmodulin light chain. Within LLC-PK1 cells, myosin-VI is soluble and does not associate with the major actin-containing domains. Within the kidney, however, myosin-VI is associated with sedimentable structures and specifically locates to the actin- and membrane-rich apical brush border domain of the proximal tubule cells. This motor was not enriched within the glomerulus, capillaries, or distal tubules. Myosin-VI associates with the proximal tubule cytoskeleton in an ATP-sensitive fashion, suggesting that this motor is associated with the actin cytoskeleton within the proximal tubule cells. Given the difference in association of myosin-VI with the apical cytoskeleton between LLC-PK1 cells and adult kidney, it is likely that this cell line does not fully differentiate to form functional proximal tubule cells. Myosin-VI may require the presence of additional elements, only found in vivo in proximal tubule cells, to properly locate to the apical domain.

scholarly journals Molecular mechanism of kNBC1-carbonic anhydrase II interaction in proximal tubule cells

2004 ◽  
Vol 559 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Alexander Pushkin ◽  
Natalia Abuladze ◽  
Eitan Gross ◽  
Debra Newman ◽  
Sergei Tatishchev ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Proximal Tubule ◽  
Molecular Mechanism ◽  
Carbonic Anhydrase Ii ◽  
Proximal Tubule Cells ◽  
Tubule Cells

Nephrotoxicity Testing In Vitro: The Current Situation

1997 ◽  
Vol 25 (5) ◽  
pp. 497-503
Author(s):  
Jean-Paul Morin ◽  
Marc E. De Broe ◽  
Walter Pfaller ◽  
Gabriele Schmuck
Keyword(s):  
Proximal Tubule ◽  
Culture Media ◽  
Task Force ◽  
Primary Cultures ◽  
Phenotypic Expression ◽  
Transepithelial Transport ◽  
Specific Cell ◽  
Proximal Tubule Cells ◽  
Tubule Cells

An ECVAM task force on nephrotoxicity has been established to advise, in particular, on the follow-up to recommendations made in the ECVAM workshop report on nephrotoxicity testing in vitro. Since this workshop was held, in 1994, there have been several improvements in the techniques used. For example, the duration of renal slice viability, and the maintenance of functional activities in slices, have been improved by using dynamic incubation systems with higher oxygen tensions and more-appropriate cell culture media. Highly differentiated primary cultures of pig, human and rabbit proximal tubule cells have been established by using specific cell isolation procedures and/or selective culture media. To date, the most comparable phenotypic expression and transepithelial transport capacities to proximal tubules in vivo have been obtained with primary cultures of rabbit proximal tubule cells which are grown on bicompartmental supports; in this system, transepithelial substrate gradients are generated and the transepithelial transport of both organic anions and cations is highly active. This in vitro system has been selected by ECVAM for further evaluation and prevalidation. Industrial needs in the area of nephrotoxicity testing have been identified, and recommendations are made at the end of this report concerning possible future initiatives.

Effects of TCDD and estradiol-17β on the proliferation and Na+/glucose cotransporter in renal proximal tubule cells

2005 ◽  
Vol 19 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Ho Jae Han ◽  
Min Jin Lim ◽  
Yun Jung Lee ◽  
Eun Jung Kim ◽  
Young Jin Jeon ◽  
...  
Keyword(s):  
Proximal Tubule ◽  
Renal Proximal Tubule ◽  
Proximal Tubule Cells ◽  
Tubule Cells ◽  
Renal Proximal Tubule Cells ◽  
Estradiol 17Β

scholarly journals Electrophysiology and ultrastructure of cultured human proximal tubule cells

1988 ◽  
Vol 33 (2) ◽  
pp. 508-516 ◽  
Author(s):  
John G. Blackburn ◽  
Debra J. Hazen-Martin ◽  
Carol J. Detrisac ◽  
Donald A. Sens
Keyword(s):  
Proximal Tubule ◽  
Proximal Tubule Cells ◽  
Tubule Cells ◽  
Human Proximal Tubule
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