Document Detail


Tamoxifen reverses the multi-drug-resistance of an established human cholangiocarcinoma cell line in combined chemotherapeutics.
MedLine Citation:
PMID:  20835928     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Our previous study established the human multi-drug-resistant cholangiocarcinoma cell line QBC939/ADM. In this study, we investigate further the ability of tamoxifen (TAM) to reverse drug-resistance to chemotherapeutics using QBC939/ADM cells. Cell growth inhibition was determined by the MTT assay, while cell cycle progression, apoptosis and the intra-cellular concentration of adriamycin (ADM) were all determined by flow cytometry. P-glycoprotein (P-gp) protein and mRNA expression was determined by Western blotting and real-time PCR. Growth inhibition and apoptosis induced by ADM, mitomycin (MMC), or vindesine (VDS) were enhanced after pre-treatment with 5 or 10 μM TAM, while only VDS increased cell numbers in the G(2)/M phase. The intra-cellular concentration of ADM rose after pre-treatment with 10 μM TAM, but not 5 μM TAM. Furthermore, real-time PCR and western blot analysis revealed down-regulation of P-gp expression in QBC939/ADM cells after TAM pre-treatment. The enhanced effects of TAM on growth inhibition, apoptosis, and intra-cellular concentration and the down-regulation of P-gp expression were blocked by an anti-P-gp antibody. TAM (10 μM) may reverse the multi-drug-resistance (MDR) of QBC939/ADM and enhance the chemotherapeutic effects on cholangiocarcinoma, by competitively inhibiting over-expressed P-gp.
Authors:
Zhi-Hua Liu; Yan-Lei Ma; Yan-Ping He; Peng Zhang; Yu-Kun Zhou; Huanlong Qin
Related Documents :
15110478 - Oligo-3-hydroxybutyrates as potential carriers for drug delivery.
18958428 - Extensive intracellular accumulation of id-6105, a novel anthracycline, in sk-ov-3 ovar...
1969768 - Novel screening method for agents that overcome classical multidrug resistance in a hum...
18522868 - Multidrug resistance reverting activity and antitumor profile of new phenothiazine deri...
19018518 - Role of single-strand dna 3'-5' exonuclease exoi and nuclease sbccd in stationary-phase...
22509428 - Hla-targeted cell sorting of microchimeric cells opens the way to phenotypical and func...
Publication Detail:
Type:  Journal Article     Date:  2010-09-14
Journal Detail:
Title:  Molecular biology reports     Volume:  38     ISSN:  1573-4978     ISO Abbreviation:  Mol. Biol. Rep.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-02-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0403234     Medline TA:  Mol Biol Rep     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1769-75     Citation Subset:  IM    
Affiliation:
Department of Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Ethics consultation on a gynecologic oncology service: an opportunity for physician education.
Next Document:  Neuro-ophthalmologic complications and manifestations of upper and lower motor neuron facial paresis...