Anisoosmotic regulation of the Nopp140 mRNA in H4IIE rat hepatoma cells and primary hepatocytes.
Using the differential display polymerase chain reaction osmosensitive regulation of mRNA levels of the nucleolar phosphoprotein of 140 kDa (Nopp140) was found in H4IIE rat hepatoma cells. These levels were downregulated after hypoosmotic exposure in H4IIE cells and primary rat hepatocytes. Hyperosmotic incubation increased Nopp140 mRNA levels in H4IIE cells but not in hepatocytes. Inhibition of p38MAPK or MAP kinase kinase upstream of Erk-1 and Erk-2 decreased Nopp140 mRNA levels but did not prevent their osmosensitivity. Because Nopp140 is involved in the regulation of transcriptional activity it could play a role in the osmosignalling pathway towards gene expression in H4IIE cells and hepatocytes.
Warskulat
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Medizinische Universitätsklinik der Heinrich-Heine-Universität Düsseldorf, Klinik für Gastroenterologie, Hepatologie und Infektiologie, Germany.
Hammermann
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Häussinger
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D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine / Q000494:pharmacology; D000818:Animals; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D002466:Cell Nucleolus / Q000378:metabolism; D002478:Cells, Cultured; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005419:Flavonoids / Q000494:pharmacology; D005786:Gene Expression Regulation; D015972:Gene Expression Regulation, Neoplastic; D006982:Hypertonic Solutions; D007093:Imidazoles / Q000494:pharmacology; D007700:Kinetics; D008099:Liver / Q000378:metabolism*; D008114:Liver Neoplasms, Experimental / Q000235:genetics / Q000378:metabolism*; D008297:Male; D019950:Mitogen-Activated Protein Kinase 1 / Q000378:metabolism; D048052:Mitogen-Activated Protein Kinase 3; D020929:Mitogen-Activated Protein Kinase Kinases; D020928:Mitogen-Activated Protein Kinases; D009687:Nuclear Proteins / Q000235:genetics*; D010750:Phosphoproteins / Q000235:genetics*; D047428:Protein Kinase Inhibitors; D011725:Pyridines / Q000494:pharmacology; D012333:RNA, Messenger / Q000235:genetics; D051381:Rats; D017208:Rats, Wistar; D015398:Signal Transduction; D014158:Transcription, Genetic / Q000187:drug effects; D014882:Water-Electrolyte Balance; D048051:p38 Mitogen-Activated Protein Kinases
D004791:Enzyme Inhibitors; D005419:Flavonoids; D006982:Hypertonic Solutions; D007093:Imidazoles; C075564:NOLC1 protein, human; C513067:Nolc1 protein, rat; D009687:Nuclear Proteins; D010750:Phosphoproteins; D047428:Protein Kinase Inhibitors; D011725:Pyridines; D012333:RNA, Messenger; D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D020929:Mitogen-Activated Protein Kinase Kinases; C093642:SB 203580; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one