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Original Paper

Coupling of α1-Adrenoceptors to ERK1/2 in the Human Prostate

Bauer R.M.a · Strittmatter F.a · Gratzke C.a · Göttinger J.a · Schlenker B.a · Reich O.a · Stief C.G.a · Hedlund P.b · Andersson K.-E.c · Hennenberg M.a

Author affiliations

aDepartment of Urology, University of Munich, Germany; bUniversity of San Raffaele, Milan, Italy; cWake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston-Salem, N.C., USA

Related Articles for ""

Urol Int 2011;86:427–433

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: September 30, 2010
Accepted: November 01, 2010
Published online: February 03, 2011
Issue release date: June 2011

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 0

ISSN: 0042-1138 (Print)
eISSN: 1423-0399 (Online)

For additional information: http://www.karger.com/UIN

Abstract

Introduction: α1-Adrenoceptors are considered critical for the regulation of prostatic smooth muscle tone. However, previous studies suggested further α1-adrenoceptor functions besides contraction. Here, we investigated whether α1-adrenoceptors in the human prostate may activate extracellular signal-regulated kinases (ERK1/2). Methods: Prostate tissues from patients undergoing radical prostatectomy were stimulated in vitro. Activation of ERK1/2 was assessed by Western blot analysis. Expression of ERK1/2 was studied by immunohistochemistry. The effect of ERK1/2 inhibition by U0126 on phenylephrine-induced contraction was studied in organ-bath experiments. Results: Stimulation of human prostate tissue with noradrenaline (30 µM) or phenylephrine (10 µM) resulted in ERK activation. This was reflected by increased levels of phosphorylated ERK1/2. Expression of ERK1/2 in the prostate was observed in smooth muscle cells. Incubation of prostate tissue with U0126 (30 µM) resulted in ERK1/2 inhibition. Dose-dependent phenylephrine-induced contraction of prostate tissue was not modulated by U0126. Conclusions: α1-Adrenoceptors in the human prostate are coupled to ERK1/2. This may partially explain previous observations suggesting a role of α1-adrenoceptors in the regulation of prostate growth.

© 2011 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: September 30, 2010
Accepted: November 01, 2010
Published online: February 03, 2011
Issue release date: June 2011

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 0

ISSN: 0042-1138 (Print)
eISSN: 1423-0399 (Online)

For additional information: http://www.karger.com/UIN


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