| Added by | mollevi |
|---|---|
| Group name | EquipeMY |
| Item Type | Journal Article |
| Title | Ovarian carcinoma patient derived xenografts reproduce their tumor of origin and preserve an oligoclonal structure |
| Creator | Colombo et al. |
| Author | Pierre-Emmanuel Colombo |
| Author | Stanislas du Manoir |
| Author | Béatrice Orsett |
| Author | Rui Bras-Gonçalves |
| Author | Mario B. Lambros |
| Author | Alan MacKay |
| Author | Tien-Tuan Nguyen |
| Author | Florence Boissière |
| Author | Didier Pourquier |
| Author | Frédéric Bibeau |
| Author | Jorge S. Reis-Filho |
| Author | Charles Theillet |
| Abstract | Advanced Epithelial Ovarian Cancer (EOC) patients frequently relapse by 24 months and develop resistant disease. Research on EOC therapies relies on cancer cell lines established decades ago making Patient Derived Xenografts (PDX) attractive models, because they are faithful representations of the original tumor. We established 35 ovarian cancer PDXs resulting from the original graft of 77 EOC samples onto immuno-compromised mice. PDXs covered the diversity of EOC histotypes and graft take was correlated with early patient death. Fourteen PDXs were characterized at the genetic and histological levels. PDXs reproduced phenotypic features of the ovarian tumors of origin and conserved the principal characteristics of the original copy number change (CNC) profiles over several passages. However, CNC fluctuations in specific subregions comparing the original tumor and the PDXs indicated the oligoclonal nature of the original tumors. Detailed analysis by CGH, FISH and exome sequencing of one case, for which several tumor nodules were sampled and grafted, revealed that PDXs globally maintained an oligoclonal structure. No overgrowth of a particular subclone present in the original tumor was observed in the PDXs. This suggested that xenotransplantation of ovarian tumors and growth as PDX preserved at least in part the clonal diversity of the original tumor. We believe our data reinforce the potential of PDX as exquisite tools in pre-clinical assays. |
| Publication | Oncotarget |
| Volume | 6 |
| Issue | 29 |
| Pages | 28327-28340 |
| Date | Sep 29, 2015 |
| Journal Abbr | Oncotarget |
| Language | eng |
| DOI | 10.18632/oncotarget.5069 |
| ISSN | 1949-2553 |
| Library Catalog | PubMed |
| Extra | PMID: 26334103 PMCID: PMC4695063 |
| Tags | Adult, Aged, Aged, 80 and over, Animals, Clone Cells, CNC, Female, Gene Expression Profiling, Gene Expression Regulation, Neoplastic, Heterografts, Humans, Mice, Nude, Middle Aged, mutations, Neoplasm Metastasis, Neoplasm Recurrence, Local, oligoclonality, original, Ovarian Neoplasms, PDX, Prognosis, Survival Analysis, Transplantation, Heterologous |
| Date Added | 2018/11/13 - 17:26:10 |
| Date Modified | 2019/05/21 - 14:52:11 |
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