Skip to main content
Advertisement

Main menu

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET

User menu

  • My alerts
  • Log in
  • My Cart

Search

  • Advanced search
Journal of Pharmacology and Experimental Therapeutics
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET
  • My alerts
  • Log in
  • My Cart
Journal of Pharmacology and Experimental Therapeutics

Advanced Search

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Visit jpet on Facebook
  • Follow jpet on Twitter
  • Follow jpet on LinkedIn
Research ArticleCELLULAR AND MOLECULAR

Erythropoietin Stimulates Cancer Cell Migration and Activates RhoA Protein through a Mitogen-Activated Protein Kinase/Extracellular Signal-Regulated Kinase-Dependent Mechanism

Sumaya N. Hamadmad and Raymond J. Hohl
Journal of Pharmacology and Experimental Therapeutics March 2008, 324 (3) 1227-1233; DOI: https://doi.org/10.1124/jpet.107.129643
Sumaya N. Hamadmad
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Raymond J. Hohl
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Figures & Data
  • Info & Metrics
  • eLetters
  • PDF
Loading

Abstract

Erythropoietin (Epo) receptor (EpoR) is expressed in several cancer cell lines, and the functional consequence of this expression is under extensive study. In this study, we used a cervical cancer cell line in which EpoR was first found to be expressed and to correlate with the severity of the disease. We demonstrate that Epo is a chemoattractant for these cancer cells, enhancing their migration under serum-starved conditions. Using a Transwell migration system, we show that Epo enhances cancer cell migration in a dose- and time-dependent manner. The effect of Epo is dependent on the activity of two signaling pathways: the mitogen-activated protein kinase (MAPK) pathway and the RhoA GTPase pathway. We show that Epo activates both pathways in a Janus kinase-dependent manner and that this activation is required for Epo effects on cell migration. Furthermore, we use both pharmacological and genetic inhibitors to demonstrate that the activation of RhoA GTPase is dependent on the activity of the MAPK pathway, providing the first evidence for interaction between these two signaling cascades.

Footnotes

  • This work was supported by the Roy J. Carver Charitable Trust as a Research Program of Excellence and the Roland W. Holden Family Program for Experimental Cancer Therapeutics.

  • Article, publication date, and citation information can be found at http://jpet.aspetjournals.org.

  • doi:10.1124/jpet.107.129643.

  • ABBREVIATIONS: Epo, erythropoietin; Jak, Janus kinase; EpoR, erythropoietin receptor; Erk, extracellular signal-regulated kinase; MAPK, mitogen-activated protein kinase; Stat, signal transducer and activator of transcription; MEK, MAPK kinase; AG490, α-cyano-(3,4-dihydroxy)-N-benzylcinnamide; PD98059, 2′-amino-3′-methoxyflavone; LPA, lysophosphatidic acid; Y-27632, N-(4-pyridyl)-4-(1-aminoethyl)-cyclohexanecarboxamide; FR180204, 5-(2-phenylpyrazolo[1,5-a]pyridin-3-yl)-1H-pyrazolo[3,4-c]pyridazin-3-amine; MEM, minimum essential medium; PAGE, polyacrylamide gel electrophoresis; GST, glutathione S-transferase; RBD, Rho binding domain; MTT, 3-(4-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide; IGF, insulin-like growth factor; DN, dominant-negative form of MEK1; ROCK, Rho kinase; GEF, guanine exchange factor; MLCK, myosin light chain kinase.

  • ↵1 Current affiliation: Department of Pharmacology, Yale University School of Medicine, New Haven, CT.

    • Received August 2, 2007.
    • Accepted December 11, 2007.
  • The American Society for Pharmacology and Experimental Therapeutics
View Full Text

JPET articles become freely available 12 months after publication, and remain freely available for 5 years. 

Non-open access articles that fall outside this five year window are available only to institutional subscribers and current ASPET members, or through the article purchase feature at the bottom of the page. 

 

  • Click here for information on institutional subscriptions.
  • Click here for information on individual ASPET membership.

 

Log in using your username and password

Forgot your user name or password?

Purchase access

You may purchase access to this article. This will require you to create an account if you don't already have one.
Back to top

In this issue

Journal of Pharmacology and Experimental Therapeutics: 384 (2)
Journal of Pharmacology and Experimental Therapeutics
Vol. 384, Issue 2
1 Feb 2023
  • Table of Contents
  • Table of Contents (PDF)
  • About the Cover
  • Index by author
  • Editorial Board (PDF)
  • Front Matter (PDF)
Download PDF
Article Alerts
Sign In to Email Alerts with your Email Address
Email Article

Thank you for sharing this Journal of Pharmacology and Experimental Therapeutics article.

NOTE: We request your email address only to inform the recipient that it was you who recommended this article, and that it is not junk mail. We do not retain these email addresses.

Enter multiple addresses on separate lines or separate them with commas.
Erythropoietin Stimulates Cancer Cell Migration and Activates RhoA Protein through a Mitogen-Activated Protein Kinase/Extracellular Signal-Regulated Kinase-Dependent Mechanism
(Your Name) has forwarded a page to you from Journal of Pharmacology and Experimental Therapeutics
(Your Name) thought you would be interested in this article in Journal of Pharmacology and Experimental Therapeutics.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Research ArticleCELLULAR AND MOLECULAR

Erythropoietin Stimulates Cancer Cell Migration and Activates RhoA Protein through a Mitogen-Activated Protein Kinase/Extracellular Signal-Regulated Kinase-Dependent Mechanism

Sumaya N. Hamadmad and Raymond J. Hohl
Journal of Pharmacology and Experimental Therapeutics March 1, 2008, 324 (3) 1227-1233; DOI: https://doi.org/10.1124/jpet.107.129643

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero

Share
Research ArticleCELLULAR AND MOLECULAR

Erythropoietin Stimulates Cancer Cell Migration and Activates RhoA Protein through a Mitogen-Activated Protein Kinase/Extracellular Signal-Regulated Kinase-Dependent Mechanism

Sumaya N. Hamadmad and Raymond J. Hohl
Journal of Pharmacology and Experimental Therapeutics March 1, 2008, 324 (3) 1227-1233; DOI: https://doi.org/10.1124/jpet.107.129643
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One

Jump to section

  • Article
    • Abstract
    • Materials and Methods
    • Results
    • Discussion
    • Footnotes
    • References
  • Figures & Data
  • Info & Metrics
  • eLetters
  • PDF

Related Articles

Cited By...

More in this TOC Section

  • Chlorogenic Acid Inhibits Breast Cancer Metastasis
  • SNAP25 and mGluRs Control Pathological Tau Release
  • N-Stearoylethanolamine Inhibits Platelet Reactivity
Show more Cellular and Molecular

Similar Articles

Advertisement
  • Home
  • Alerts
Facebook   Twitter   LinkedIn   RSS

Navigate

  • Current Issue
  • Fast Forward by date
  • Fast Forward by section
  • Latest Articles
  • Archive
  • Search for Articles
  • Feedback
  • ASPET

More Information

  • About JPET
  • Editorial Board
  • Instructions to Authors
  • Submit a Manuscript
  • Customized Alerts
  • RSS Feeds
  • Subscriptions
  • Permissions
  • Terms & Conditions of Use

ASPET's Other Journals

  • Drug Metabolism and Disposition
  • Molecular Pharmacology
  • Pharmacological Reviews
  • Pharmacology Research & Perspectives
ISSN 1521-0103 (Online)

Copyright © 2023 by the American Society for Pharmacology and Experimental Therapeutics