Abstract
In mammals, the cells of the renal medulla are physiologically exposed to interstitial osmolalities several-fold higher that found in any other tissue. Nevertheless, these cells not only have the ability to survive in this harsh environment, but also to function normally, which is critical for maintenance of systemic electrolyte and fluid homeostasis. Over the last two decades, a substantial body of evidence has accumulated, indicating that sequential and well orchestrated genomic responses are required to provide tolerance to osmotic stress. This includes the enhanced expression and action of immediate-early genes, growth arrest and DNA damage inducible genes (GADDs), genes involved in cell cycle control and apoptosis, heat shock proteins, and ultimately that of genes involved in the intracellular accumulation of nonperturbing organic osmolytes. The present review summarizes the sequence of genomic responses conferring resistance against osmotic stress. In addition, the regulatory mechanisms mediating the coordinated genomic response to osmotic stress will be highlighted.
Keywords: Osmotic stress, osmoadaptation, gene expression, renal medullary cells, osmoprotective genes
Current Genomics
Title: Osmoadaptation of Mammalian Cells - An Orchestrated Network of Protective Genes
Volume: 8 Issue: 4
Author(s): Christoph Kuper, Franz-X. Beck and Wolfgang Neuhofer
Affiliation:
Keywords: Osmotic stress, osmoadaptation, gene expression, renal medullary cells, osmoprotective genes
Abstract: In mammals, the cells of the renal medulla are physiologically exposed to interstitial osmolalities several-fold higher that found in any other tissue. Nevertheless, these cells not only have the ability to survive in this harsh environment, but also to function normally, which is critical for maintenance of systemic electrolyte and fluid homeostasis. Over the last two decades, a substantial body of evidence has accumulated, indicating that sequential and well orchestrated genomic responses are required to provide tolerance to osmotic stress. This includes the enhanced expression and action of immediate-early genes, growth arrest and DNA damage inducible genes (GADDs), genes involved in cell cycle control and apoptosis, heat shock proteins, and ultimately that of genes involved in the intracellular accumulation of nonperturbing organic osmolytes. The present review summarizes the sequence of genomic responses conferring resistance against osmotic stress. In addition, the regulatory mechanisms mediating the coordinated genomic response to osmotic stress will be highlighted.
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Cite this article as:
Christoph Kuper , Franz-X. Beck and Wolfgang Neuhofer , Osmoadaptation of Mammalian Cells - An Orchestrated Network of Protective Genes, Current Genomics 2007; 8 (4) . https://dx.doi.org/10.2174/138920207781386979
DOI https://dx.doi.org/10.2174/138920207781386979 |
Print ISSN 1389-2029 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5488 |
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