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Molecular correlates of platinum response in human high-grade serous ovarian cancer patient-derived xenografts. | LitMetric

Molecular correlates of platinum response in human high-grade serous ovarian cancer patient-derived xenografts.

Mol Oncol

The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; Royal Women's Hospital, Parkville, Victoria 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia. Electronic address:

Published: May 2014

AI Article Synopsis

Article Abstract

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-naïve, human HG-SOC by transplanting fresh human HG-SOC fragments into subcutaneous and intra-ovarian bursal sites of NOD/SCID IL2Rγ(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.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4400120PMC
http://dx.doi.org/10.1016/j.molonc.2014.01.008DOI Listing

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