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Originally published In Press as doi:10.1074/jbc.M205616200 on November 21, 2002
J. Biol. Chem., Vol. 278, Issue 6, 3969-3975, February 7, 2003
Endothelin-1-specific Activation of B-type Natriuretic Peptide
Gene via p38 Mitogen-activated Protein Kinase and Nuclear ETS
Factors*
Sampsa
Pikkarainen ,
Heikki
Tokola ,
Risto
Kerkelä ,
Theresa
Majalahti-Palviainen§,
Olli
Vuolteenaho§, and
Heikki
Ruskoaho ¶
From the Department of Pharmacology and Toxicology
and § Department of Physiology, Biocenter Oulu,
University of Oulu, P. O. Box 5000, Oulu FIN-90014, Finland
Terminally differentiated cardiac myocytes adapt
to mechanical and neurohumoral stress via morphological changes of
individual cells accompanied by reactivation of fetal pattern of gene
expression. Endothelin-1, a powerful paracrine mediator of myocyte
growth, induces similar changes in cultured cardiac myocytes as those seen in hypertrophied heart in vivo. By using rat B-type
natriuretic peptide promoter, we identified a novel ETS binding
sequence, on which nuclear protein binding is activated in
endothelin-1-treated cultured cardiac myocytes. This sequence binds
ETS-like gene-1 transcription factor and mediates endothelin-1-specific
activation of transcription, but not responses to increased calcium
signaling via L-type calcium channels, angiotensin II
treatment, or mechanical stretch of myocytes. Interestingly,
endothelin-1 activated signaling converges via p38 mitogen-activated
protein kinase-dependent mechanism on ETS binding site,
whereas this element inhibits extracellular signal-regulated kinase
activated transcription. In conclusion, given the fundamental role of
the interaction of mitogen-activated protein kinases and ETS factors in
regulation of eukaryotic cell differentiation, growth, and oncogenesis,
these results provide the unique evidence of a endothelin-1- and
mitogen-activated protein kinase-regulated ETS factor pathway for
cardiac myocytes.
*
This work was supported by grants from the Academy of
Finland (to H. R.), the AstraZeneca Research Foundation (to S. P.), the Sigrid Juselius Foundation (to H. R.), the Aarne Koskelo
Foundation (to R. K., T. M.-P., and S. P.), the Ida Montin
Foundation (to R. K. and S. P.), the Finnish Foundation for
Cardiovascular Research (to H. R., S. P., and R. K.), the Research
Foundation of Orion Co. (to R. K.), and the Finnish Cultural
Foundation (to S. P.).The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
¶
To whom correspondence should be addressed. Tel.:
358-8-537-5236; Fax: 358-8-537-5247; E-mail:
heikki.ruskoaho@oulu.fi.
Copyright © 2003 by The American Society for Biochemistry and Molecular Biology, Inc.

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