No full text
Article (Scientific journals)
Hyperosmotic stress induces immediate-early gene expression in ventricular adult cardiomyocytes.
Wollnik, B.; Kubisch, C.; Maass, A. et al.
1993In Biochemical and biophysical research communications, 194 (2), p. 642-6
Peer reviewed
 

Files


Full Text
No document available.

Send to



Details



Keywords :
Animals; Blotting, Northern; Cells, Cultured; DNA-Binding Proteins/biosynthesis/genetics; Early Growth Response Protein 1; Gene Expression Regulation/drug effects; Genes, fos; Heart Ventricles; Immediate-Early Proteins; Male; Myocardium/cytology/metabolism; Proto-Oncogenes; RNA, Messenger/biosynthesis/isolation & purification/metabolism; Rats; Rats, Inbred WKY; Saline Solution, Hypertonic/pharmacology; Transcription Factors/biosynthesis/genetics; Zinc Fingers/genetics
Abstract :
[en] Mammalian cells possessing osmosensors have long been described in brain and kidney. The genetic basis of the response to hyperosmotic stress has been well characterized in prokaryotes. In contrast, the genetic response of eukaryotic cells is poorly understood. Therefore we investigated the effect of hypertonic NaCl and sucrose solutions on the transcriptional activation of the immediate-early genes (IEGs) egr-1 and c-fos in isolated ventricular adult rat cardiomyocytes. We observed that even small increases in osmolarity to 315 +/- 5 mosmol/l and 370 +/- 8 mosmol/l by hypertonic NaCl solution resulted in dose-dependent induction of egr-1 (4-and 5-fold) and c-fos (3-and 4-fold), respectively. Hypertonic sucrose solution had the same effect on egr-1 and c-fos mRNA levels while increased sucrose concentration under isotonic conditions had no effect. Cardiomyocytes exposed to hypertonic media did not significantly shrink as shown by a cell length measurement. We conclude that isolated adult cardiomyocytes possess an osmoreceptor mechanism which is able to sense even slight changes in osmolarity and to translate these into a transcriptional response of the myocardial IEG program.
Disciplines :
Cardiovascular & respiratory systems
Author, co-author :
Wollnik, B.
Kubisch, C.
Maass, A.
Vetter, H.
Neyses, Ludwig ;  University of Luxembourg > Research Office
External co-authors :
yes
Language :
English
Title :
Hyperosmotic stress induces immediate-early gene expression in ventricular adult cardiomyocytes.
Publication date :
1993
Journal title :
Biochemical and biophysical research communications
ISSN :
0006-291X
Volume :
194
Issue :
2
Pages :
642-6
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 01 June 2016

Statistics


Number of views
71 (0 by Unilu)
Number of downloads
0 (0 by Unilu)

Scopus citations®
 
21
Scopus citations®
without self-citations
20
OpenCitations
 
14
WoS citations
 
26

Bibliography


Similar publications



Contact ORBilu