Abstract
The development over the past 20 years of a variety of cultured renal tubule cell lines derived from different parts of the renal tubule has provided invaluable powerful cell systems for in vitro analyses of the various tubule segment-specific biochemical functions and ion transport processes. Immortalized cell lines have been established using different hybrid gene constructs, most of them carrying the immortalizing simian virus 40 large T antigen (Tag) gene. The development of transgenic mice carrying unregulated Tag, and of others in which the expression of Tag remains controlled, has made it possible to establish permanent cell lines derived from microdissected or immunoselected renal proximal, distal, and collecting duct tubules. This review summarizes the different strategies of cellular immortalization used and the most frequently used human, rabbit, rat, and mouse tubule cell lines. This review provides an overview of the use of immortalized mouse tubule cell lines for in vitro analyses of various tubule cell-specific functions and the regulation of ion transporters and membranous channels. The advantages of using primary cultures of isolated tubules dissected from physiopathological models of transgenic mice are also discussed.
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