Aldosterone modulates PNA binding cell isoforms within renal collecting duct epithelium

• Published in: Kidney international Vol. 44; no. 3; pp. 537 - 544
• Main Authors: Minuth, Will W., Fietzek, Wolfgang, Kloth, Sabine, Aigner, Joachim, Herter, Peter, Röckl, Wolfgang, Kubitza, Marion, Stöckl, Günther, Dermietzel, Rolf
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01-09-1993; Nature Publishing
• Subjects: Aldosterone - pharmacology; Animals; Arachis; Biological and medical sciences; Cell Differentiation - drug effects; Cells, Cultured; Cytological Techniques; Epithelial Cells; Epithelium - drug effects; Epithelium - metabolism; Fluorescent Antibody Technique; Fundamental and applied biological sciences. Psychology; Kidney Tubules, Collecting - cytology; Kidney Tubules, Collecting - drug effects; Kidney Tubules, Collecting - metabolism; Lectins - metabolism; Microscopy, Electron, Scanning; Peanut Agglutinin; Plant Lectins; Rabbits; Vertebrates: urinary system; Cell culture; Rabbit; Lagomorpha; Aldosterone; Epithelium; Kidney; Organogenesis; Vertebrata; Mammalia; Animal; Agglutinin; Collecting duct; Renal cortex
• ISSN: 0085-2538; 1523-1755
• DOI: 10.1038/ki.1993.278

Aldosterone modulates PNA binding cell isoforms within renal collecting duct epithelium. To investigate the differentiation of the ampullary collecting duct cells into adult principal and intercalated cells, the embryonic cortex of newborn New Zealand rabbit kidney was isolated and brought in culture. With this culture technique the ampullary cells formed a polarized collecting duct epithelium which was kept under permanent exchange of medium and in the presence of aldosterone, argine vasopressin and/or insulin. After 14 days of perfusion culture the epithelia showed light and dark cells resembling the principal and intercalated cells of the adult collecting duct. The differentiation from embryonic into adult collecting duct cells was controlled by applying the monoclonal antibody CD 7. Independent of the hormonal treatment all of the epithelial cells matured in culture and expressed the CD 7 antigen. This corresponded with the situation found within the adult kidney, where the CD 7 antigen was localized in all principal and intercalated (IC) cells, whereas the embryonic ampullary epithelium in the neonatal kidney remained negative. A differentiation feature of the β-type intercalated cell was investigated by labeling the cultured epithelia with peanut agglutinin (PNA). In contrast to the CD 7 antigen the development of PNA binding was highly dependent of time and individual hormone administration. While in control epithelia only 8% of PNA positive cells were found, aldosterone induced epithelia revealed 72% PNA labeled cells. The combination of aldosterone and insulin increased the number of PNA-positive cells to 90%. By scanning electron microscopy it could further be shown that several isoforms of cells were reactive with PNA. Thus, in culture the PNA label is not restricted to the typical β-type IC cells.