Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/12487
Title: Glaucarubinone inhibits colorectal cancer growth by suppression of hypoxia-inducible factor 1α and β-catenin via a p-21 activated kinase 1-dependent pathway.
Authors: Huynh, Nhi;Beutler, John A;Shulkes, Arthur;Baldwin, Graham S;He, Hong
Affiliation: Department of Surgery, University of Melbourne, Austin Health, Heidelberg, Victoria, Australia 3084, Australia
Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
Electronic address: hong.he@unimelb.edu.au.
Issue Date: 22-Oct-2014
Citation: Biochimica Et Biophysica Acta 2014; 1853(1): 157-65
Abstract: p-21-Activated kinase 1 (PAK1) enhances colorectal cancer (CRC) progression by stimulating Wnt/β-catenin, ERK and AKT pathways. PAK1 also promotes CRC survival via up-regulation of hypoxia-inducible factor 1α (HIF-1α), a key player in cancer survival. Glaucarubinone, a quassinoid natural product, inhibits pancreatic cancer growth by down-regulation of PAK1. The aim of this study was to investigate the effect of glaucarubinone on CRC growth and metastasis, and the mechanism involved. Cell proliferation was measured in vitro by [(3)H]-thymidine incorporation and in vivo by volume of tumor xenografts. Protein concentrations were measured by Western blotting of cell extracts. We report here that glaucarubinone inhibited CRC growth both in vitro and in vivo. The potency of glaucarubinone as an inhibitor of cell proliferation was negatively correlated to PAK1 expression in CRC cells. Glaucarubinone suppressed the expression of HIF-1α and β-catenin. Knockdown of PAK1 by shRNA enhanced inhibition by glaucarubinone while constitutively active PAK1 blocked the inhibitory effect. Our findings indicate that glaucarubinone inhibited CRC growth by down-regulation of HIF-1α and β-catenin via a PAK1-dependent pathway.
Internal ID Number: 25409929
URI: http://ahro.austin.org.au/austinjspui/handle/1/12487
DOI: 10.1016/j.bbamcr.2014.10.013
URL: http://www.ncbi.nlm.nih.gov/pubmed/25409929
Type: Journal Article
Subjects: CRC
Glaucarubinone
HIF-1α
PAK1
β-Catenin
Cell Line, Tumor
Cell Proliferation.drug effects
Colorectal Neoplasms.drug therapy.pathology
Glaucarubin.analogs & derivatives.pharmacology
Humans
Hypoxia-Inducible Factor 1, alpha Subunit.antagonists & inhibitors
beta Catenin.antagonists & inhibitors
p21-Activated Kinases.physiology
Appears in Collections:Journal articles

Files in This Item:
There are no files associated with this item.


Items in AHRO are protected by copyright, with all rights reserved, unless otherwise indicated.