Document Detail


Tanshinone IIA inhibits constitutive STAT3 activation, suppresses proliferation, and induces apoptosis in rat C6 glioma cells.
MedLine Citation:
PMID:  20045721     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Signal transducer and activator of transcription 3 (STAT3) is usually constitutively activated in a variety of malignancies. Thus, STAT3 may be a promising target for treatment of tumor cells. Recently, Tanshinone IIA (Tan IIA), a major active constituent from the root of Salvia miltiorrhiza Bunge, was reported to have apoptosis inducing effects on a large variety of cancer cells. In this study, we evaluate the anti-proliferation and apoptosis inducing effects of Tan IIA on C6 glioma cells. Cell growth and proliferation were measured by MTT assay, cell apoptosis was observed by flow cytometry and DNA-fragmentation analysis. Further more, we investigated inhibitory effects of Tan IIA on STAT3 activity and its downstream targets: Bcl-XL, cyclin D1. Alteration of STAT3 activity was examined by measuring their DNA binding activity and tyrosine phosphorylation. Changes in the expression levels of Bcl-XL and cyclin D1 were examined by Western blot analysis. We found that the cellular growth were inhibited and cell apoptosis were observed after the treatment with Tan IIA. The STAT3 activity was significantly reduced by Tan IIA parallel with a significant attenuation of expression of Bcl-XL and cyclin D1. These results suggest that Tan IIA may serve as an effective adjunctive reagent in the treatment of glioma for its targeting of constitutive STAT3 signaling.
Authors:
Chao Tang; Hong-li Xue; Hai-bo Huang; Xiao-gang Wang
Publication Detail:
Type:  Journal Article     Date:  2010-01-05
Journal Detail:
Title:  Neuroscience letters     Volume:  470     ISSN:  1872-7972     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-01     Completed Date:  2010-04-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  126-9     Citation Subset:  IM    
Copyright Information:
(c) 2009 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Department of Neurosurgery, The General Hospital of Shenyang Military Region, Shen Yang 110016, Liaoning Province, PR China.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antineoplastic Agents, Phytogenic / administration & dosage,  pharmacology*
Apoptosis / drug effects*
Cell Line, Tumor
Cell Proliferation / drug effects*
Cell Survival / drug effects
Cyclin D1 / metabolism
DNA Fragmentation / drug effects
Dose-Response Relationship, Drug
Glioma / drug therapy*,  physiopathology
Phenanthrenes / administration & dosage,  pharmacology*
Rats
STAT3 Transcription Factor / metabolism*
Time Factors
bcl-X Protein / metabolism
Chemical
Reg. No./Substance:
0/Antineoplastic Agents, Phytogenic; 0/Bcl2l1 protein, rat; 0/Ccnd1 protein, rat; 0/Phenanthrenes; 0/STAT3 Transcription Factor; 0/Stat3 protein, rat; 0/bcl-X Protein; 136601-57-5/Cyclin D1; 568-73-0/tanshinone

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