Growth of human renal cortical tissue on collagen gel |
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Authors: | Sung-Goo Chang Károly Tóth Jennifer D Black Harry K Slocum Scott D Perrapato Robert P Huben Youcef M Rustum |
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Institution: | (1) Present address: Department of Urology, Kyung Hee University Medical Center, I Hoegi-dong Dongdaemum-Ku, 130-702 Seoul, Korea;(2) Grace Cancer Drug Center and Experimental Therapeutics, Roswell Park Cancer Institute, Elm and Carlton Streets, 14263 Buffalo, New York;(3) Department of Urologic Oncology, Roswell Park Cancer Institute, Elm and Carlton Streets, 14263 Buffalo, New York |
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Abstract: | Summary A model system for 3-dimensional “native-state” culture of tissues on collagen gels (Proc. Natl. Acad. Sci. USA 86:2013–2017;
1989) has been applied in this study to histologically normal human renal cortical tissue from 11 patients undergoing nephrectomy
for renal cell carcinoma elsewhere in the kidney. Microbial contamination occurred in 12/90 cultures, the rest (78) were studied
by visual inspection, histology, immunohistochemical analysis for pankeratin (epithelial cell origin), vimentin (mesenchymal
cell origin), andp-glycoprotein (associated with proximal tubules), transmission electron microscopy (EM), incorporation of tritiated thymidine
(3HTdR). In the first 10 days, explants showed3HTdR-labeled cells in tubule structures. The surrounding gel was invaded by cells forming tubule structures, sometimes with
basement membrane. Some of these cells showed labeling by3HTdR and immunostaining positive for pankeratin andp-glycoprotein. EM showed well-polarized epithelial cells in tubule structures with tight junctions, interdigitating lateral
processes, and microvilli characteristic of proximal and distal convoluted tubules.3HTdR-labeled cells in tubule structures were observed even 2 mo. after Passage 1, 6 mo. after the initial explantation. Tubule
growth was most active and fibroblast proliferation was negligible from 2 to 4 wk postexplantation. The proliferation of tubulelike
cells and formation of tubulelike structures in this system represents an opportunity to study human renal cortical tissue
in vitro, under conditions more closely resembling in vivo circumstances than are present in other in vitro systems suitable
for long-term study. This model has potential use for in vitro toxicology studies and studies of renal physiology. |
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Keywords: | three-dimensional collagen gel culture human kidney tubule growth histology immunohistochemistry electron microscopy (3H)thymidine p-glycoprotein |
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