Journal
MOLECULAR ONCOLOGY
Volume 8, Issue 3, Pages 656-668Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.molonc.2014.01.008
Keywords
Serous ovarian cancer; Platinum; Xenograft; DNA repair; BRCA1; BRCA2
Categories
Funding
- National Health and Medical Research Council (NHMRC Australia)
- National Health and Medical Research Council (Fellowship JKF) [441101]
- National Health and Medical Research Council (Fellowship KJH) [494836]
- Cancer Council Victoria (Sir Edward Dunlop Fellowship in Cancer Research)
- Victorian Cancer Agency (Clinical Fellowship)
- Monash University (PhD Scholarship)
- CRC for Cancer Therapeutics (PhD top-up scholarship)
- Ovarian Cancer Australia (PhD Scholarship)
- National Institute of Health [2P50CA083636]
- Wendy Feuer Ovarian Cancer Research Fund
- Clovis Oncology Foundation Medicine analyses
- U.S. Army Medical Research and Materiel Command [DAMD17-01-1-0729]
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Introduction: Improvement in the ability to target underlying drivers and vulnerabilities of high-grade serous ovarian cancer (HG-SOC) requires the development of molecularly annotated pre-clinical models reflective of clinical responses. Methods: We generated patient-derived xenografts (PDXs) from consecutive, chemotherapy-naive, human HG-SOC by transplanting fresh human HG-SOC fragments into subcutaneous and intra-ovarian bursal sites of NOD/SCID IL2R gamma(null) recipient mice, completed molecular annotation and assessed platinum sensitivity. Results: The success rate of xenografting was 83%. Of ten HG-SOC PDXs, all contained mutations in TP53, two were mutated for BRCA1, three for BRCA2, and in two, BRCA1 was methylated. In vivo cisplatin response, determined as platinum sensitive (progression-free interval >= 100 d, n = 4), resistant (progression-free interval <100 d, n = 3) or refractory (n = 3), was largely consistent with patient outcome. Three of four platinum sensitive HG-SOC PDXs contained DNA repair gene mutations, and the fourth was methylated for BRCA1. In contrast, all three platinum refractory PDXs overexpressed dominant oncogenes (CCNE1, LIN28B and/or BCL2). Conclusions: Because PDX platinum response reflected clinical outcome, these annotated PDXs will provide a unique model system for preclinical testing of novel therapies for HG-SOC. (C) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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