Madin-Darby canine kidney (MDCK) cells have been used in research on crystal adhesion to epithelial cells. Recently, matrix proteins were identified, and studies of the genes and proteins expressed in renal epithelial cells have become active. The present study confirms the usefulness of the NRK-52E cell line, derived from the rat, in the study of attachment with calcium oxalate crystals. The calcium oxalate crystal suspension was distributed on top of the cells. After incubation, the monolayers were rinsed to remove non-associated crystals. After fixation, the association of crystals and NRK-52E cells was visualized using scanning electron microscopy. Calcium oxalate crystals were attached to the surface of NRK-52E cells. Under high magnification, many of the microvilli of the cells had elongated towards the crystals, and microvilli projections appeared to catch the crystals. The NRK-52E cell line is useful in the study of attachment between crystals and urinary epithelial cells in the kidney, especially for the regulation and analysis of genes and proteins.

Keywords:
Rat kidney cell, NRK-52E, Calcium oxalate, Osteopontin
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© 2001 S. Karger AG, Basel
2001
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