Abstract
ABCB1 (adenosine triphosphate-binding cassette transporter B1) mediates cellular elimination of many chemotherapeutic agents including paclitaxel, which is commonly used to treat ovarian cancer. A significant association between common single nucleotide polymorphisms (SNPs) in ABCB1 and progression-free survival has been reported in patients with ovarian cancer. Variable paclitaxel clearance due to genotype specific differences in ABCB1 activity in cancer cells and/or normal tissues may underlie the association. Using cell-based models, we evaluated the correlations between ABCB1 expression, polymorphisms, transporter activity and paclitaxel sensitivity in ovarian cancer (n = 10) and lymphoblastoid (n = 19) cell lines. Close associations between ABCB1 expression, transporter function and paclitaxel sensitivity were found in lymphoblastoid cell lines, although we could not demonstrate an association with common SNPs. In ovarian cancer cell lines, ABCB1 expression was low and the association between expression and function was lost. These results suggest that ABCB1 related survival difference in ovarian cancer patients is more likely to be due to differential whole body paclitaxel clearance mediated by normal cells rather than a direct effect on cancer cells.
Original language | English |
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Article number | 4669 |
Journal | Scientific Reports |
Volume | 4 |
DOIs | |
State | Published - 9 May 2014 |
Externally published | Yes |
Bibliographical note
Funding Information:This project was supported by the National Health and Medical Research Council (NHMRC) of Australia (scholarship to B.G.), Cancer Institute New South Wales and Cancer Australia (552481). AdeF is funded by the University of Sydney Cancer Research Fund and the Cancer Institute NSW through the Sydney-West Translational Cancer Research Centre. We gratefully acknowledge the cooperation of the institutions that supported the study. We also acknowledge the contribution of Australian Ovarian Cancer Study Group (full list can be found at http://www.aocstudy.org), all study nurses and research assistants and would like to thank all of the women who participated in AOCS. AOCS was supported by U.S. Army Medical Research and Materiel Command DAMD17-01-1-0729, NHMRC Enabling Grant 400413 and Project Grant 400281, the Cancer Council Tasmania and the Cancer Foundation of Western Australia.
Funding
This project was supported by the National Health and Medical Research Council (NHMRC) of Australia (scholarship to B.G.), Cancer Institute New South Wales and Cancer Australia (552481). AdeF is funded by the University of Sydney Cancer Research Fund and the Cancer Institute NSW through the Sydney-West Translational Cancer Research Centre. We gratefully acknowledge the cooperation of the institutions that supported the study. We also acknowledge the contribution of Australian Ovarian Cancer Study Group (full list can be found at http://www.aocstudy.org), all study nurses and research assistants and would like to thank all of the women who participated in AOCS. AOCS was supported by U.S. Army Medical Research and Materiel Command DAMD17-01-1-0729, NHMRC Enabling Grant 400413 and Project Grant 400281, the Cancer Council Tasmania and the Cancer Foundation of Western Australia.
Funders | Funder number |
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Cancer Foundation of Western Australia | |
Cancer Institute New South Wales and Cancer Australia | 552481 |
Sydney-West Translational Cancer Research Centre | |
Medical Research and Materiel Command | DAMD17-01-1-0729 |
National Health and Medical Research Council | 400281, 400413 |
Cancer Council Tasmania | |
Cancer Institute NSW | |
University of Sydney |