Journal Article


Martin Clynes
Robert O'Connor
Kieran Duffy
Irene Oglesby
Padraig Doolan
Susan McDonnell
Lorraine O'Driscoll
Yizheng Liang



reverse transcriptase polymerase chain reaction invasiveness humans gene expression anticancer drugs carcinoma squamous cell genetics cell movement antineoplastic agents administration dosage gene expression regulation neoplastic pathology drug resistance neoplasm human lung carcinoma cell line carcinoma non small cell lung blotting western pharmacology drug resistance drug administration schedule lung resistance tumor cells cultured gene expression profiling lung neoplasms pulse patterns neoplasm invasiveness

Enhanced in vitro invasiveness and drug resistance with altered gene expression patterns in a human lung carcinoma cell line after pulse selection with anticancer drugs. (2004)

Abstract The human lung carcinoma cell line DLKP was exposed to sequential pulses of 10 commonly used chemotherapeutic drugs (VP-16, vincristine, taxotere, mitoxantrone, 5-fluorouracil, methotrexate, CCNU, BCNU, cisplatin and chlorambucil); resulting cell lines exhibited resistance to the selecting agents (ranging approx. 1.5- to 36-fold) and, in some cases, cross-resistance to methotrexate (approx. 1.4- to 22-fold), vincristine (1.6- to 262-fold), doxorubicin (Adriamycin, approx. 1.1- to 33-fold) and taxotere (approx. 1.1- to 36-fold). Several of the variants displayed collateral sensitivity to cisplatin. A marked increase in in vitro invasiveness and motility was observed with variants pulsed with mitoxantrone, 5-fluorouracil, methotrexate, BCNU, cisplatin and chlorambucil. There was no significant change in invasiveness of cells pulsed with VP-16, vincristine, taxotere or CCNU. All of the pulse-selected variants showed elevated levels of MDR-1/P-gp protein by Western blot analysis, although mdr-1 mRNA levels were not increased (except for DLKP-taxotere). In DLKP-taxotere, MRP1 protein levels were also greatly elevated, but mrp1 mRNA levels remained unchanged. BCRP was upregulated in DLKP-mitoxantrone at both the mRNA and protein levels. Gelatin zymography, Western blot and RT-PCR showed that DLKP and its variants secreted MMPs 2, 9 and 13. MMP inhibition assays suggested that MMP-2 plays a more important role than MMPs 9 and 13 in cell invasion of these DLKP drug-resistant variants in vitro. These results indicate that drug exposure may induce not only resistance but also invasiveness in cancer cells.
Collections Ireland -> Trinity College Dublin -> Pharmacy and Pharmaceutical Sciences (Scholarly Publications)
Ireland -> Trinity College Dublin -> Pharmacy and Pharmaceutical Sciences
Ireland -> Trinity College Dublin -> RSS Feeds
Ireland -> Dublin City University -> PubMed
Ireland -> Trinity College Dublin -> School of Pharmacy and Pharmaceutical Sciences
Ireland -> Trinity College Dublin -> RSS Feeds

Full list of authors on original publication

Martin Clynes, Robert O'Connor, Kieran Duffy, Irene Oglesby, Padraig Doolan, Susan McDonnell, Lorraine O'Driscoll, Yizheng Liang

Experts in our system

Martin Clynes
Dublin City University
Total Publications: 209
Robert O'Connor
Dublin City University
Total Publications: 71
Irene K Oglesby
Royal College of Surgeons in Ireland
Total Publications: 13
Padraig Doolan
Dublin City University
Total Publications: 37
Susan McDonnell
University College Dublin
Total Publications: 25
Lorraine O'Driscoll
Trinity College Dublin
Total Publications: 152