Podocytes in metanephric organ culture express characteristic in vivo phenotypes View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-07

AUTHORS

M. Nagata, Teruo Watanabe

ABSTRACT

Podocytes outgrown from isolated glomeruli in vitro have failed to express fully differentiated in vivo phenotypes. In an attempt to determine whether podocytes in metanephric culture accomplish terminal differentiation, as observed in vivo, we investigated expression of their characteristic phenotypic features in rat metanephric organ cultures using immunohistochemistry and electron microscopy. Rat metanephroi were harvested on embryonic day 12.5 and cultured on transmembrane filters for 9 days. Morphological examination revealed two maturation stages when the podocytes resembled those of the S-shaped body stage and maturational stages of glomeruli in vivo. Electron microscopy revealed that, firstly podocytes lost their intercellular contacts and, simultaneously, the tight junctions shifted into close proximity to cell bases, followed by foot process development. Immunohistochemistry demonstrated that the tight junction protein, ZO-1, and specific podocytic markers, pp44, 5-1–6, podocalyxin and vimentin were expressed in a cell maturity-dependent manner, as observed in newborn rat kidneys. Furthermore, glomerular basement membrane components, collagen type IV and laminin, were expressed in the glomerular center. Our findings that cell maturity-dependent expression of structural and functional phenotypes in podocytes in metanephric culture was the same as that observed in developing kidneys in vivo indicate that podocyte differentiation during glomerulogenesis may be operated by an intrinsic property, such as programmed cell fate. Furthermore, these highly differentiated podocytes in vitro may provide clues that will help to establish a podocyte culture system. More... »

PAGES

17-25

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s004180050142

DOI

http://dx.doi.org/10.1007/s004180050142

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044724525

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/9377221


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