Novel patient-derived xenograft and cell line models for therapeutic testing of pediatric liver cancer.

TitleNovel patient-derived xenograft and cell line models for therapeutic testing of pediatric liver cancer.
Publication TypeJournal Article
Year of Publication2016
AuthorsBissig-Choisat, B, Kettlun-Leyton, C, Legras, XD, Zorman, B, Barzi, M, Chen, LL, Amin, MD, Huang, Y-H, Pautler, RG, Hampton, OA, Prakash, MM, Yang, D, Borowiak, M, Muzny, DM, Doddapaneni, H, Hu, J, Shi, Y, M Gaber, W, M Hicks, J, Thompson, PA, Lu, Y, Mills, GB, Finegold, M, Goss, JA, D Parsons, W, Vasudevan, SA, Sumazin, P, López-Terrada, D, Bissig, K-D
JournalJ Hepatol
Volume65
Issue2
Pagination325-33
Date Published2016 Aug
ISSN1600-0641
KeywordsAnimals, Carcinoma, Hepatocellular, Cell Line, Tumor, Child, Disease Models, Animal, Heterografts, Humans, Liver Neoplasms, Mice, Neoplasm Transplantation, Xenograft Model Antitumor Assays
Abstract

BACKGROUND & AIMS: Pediatric liver cancer is a rare but serious disease whose incidence is rising, and for which the therapeutic options are limited. Development of more targeted, less toxic therapies is hindered by the lack of an experimental animal model that captures the heterogeneity and metastatic capability of these tumors.METHODS: Here we established an orthotopic engraftment technique to model a series of patient-derived tumor xenograft (PDTX) from pediatric liver cancers of all major histologic subtypes: hepatoblastoma, hepatocellular cancer and hepatocellular malignant neoplasm. We utilized standard (immuno) staining methods for histological characterization, RNA sequencing for gene expression profiling and genome sequencing for identification of druggable targets. We also adapted stem cell culturing techniques to derive two new pediatric cancer cell lines from the xenografted mice.RESULTS: The patient-derived tumor xenografts recapitulated the histologic, genetic, and biological characteristics-including the metastatic behavior-of the corresponding primary tumors. Furthermore, the gene expression profiles of the two new liver cancer cell lines closely resemble those of the primary tumors. Targeted therapy of PDTX from an aggressive hepatocellular malignant neoplasm with the MEK1 inhibitor trametinib and pan-class I PI3 kinase inhibitor NVP-BKM120 resulted in significant growth inhibition, thus confirming this PDTX model as a valuable tool to study tumor biology and patient-specific therapeutic responses.CONCLUSIONS: The novel metastatic xenograft model and the isogenic xenograft-derived cell lines described in this study provide reliable tools for developing mutation- and patient-specific therapies for pediatric liver cancer.LAY SUMMARY: Pediatric liver cancer is a rare but serious disease and no experimental animal model currently captures the complexity and metastatic capability of these tumors. We have established a novel animal model using human tumor tissue that recapitulates the genetic and biological characteristics of this cancer. We demonstrate that our patient-derived animal model, as well as two new cell lines, are useful tools for experimental therapies.

DOI10.1016/j.jhep.2016.04.009
Alternate JournalJ Hepatol
PubMed ID27117591
PubMed Central IDPMC5668139
Grant ListP30 CA016672 / CA / NCI NIH HHS / United States
T32 HL092332 / HL / NHLBI NIH HHS / United States
U01 HG006485 / HG / NHGRI NIH HHS / United States
P30 CA125123 / CA / NCI NIH HHS / United States
P30 DK056338 / DK / NIDDK NIH HHS / United States
T32 DK007664 / DK / NIDDK NIH HHS / United States

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