Cited by 136Ovarian cancer diagnosis and treatmentCancer Immunotherapy and BiomarkersBRCA gene mutations in cancer

Genetically Defined Syngeneic Mouse Models of Ovarian Cancer as Tools for the Discovery of Combination Immunotherapy

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Iyer, Sonia, Zhang, Shuang, Yucel, Simge, Horn, Heiko, Smith, Sean G., Reinhardt, Ferenc, Hoefsmit, Esmee, Assatova, Bimarzhan +15 more·2021·Cancer Discovery

Published version of a preprint

Abstract

Abstract Despite advances in immuno-oncology, the relationship between tumor genotypes and response to immunotherapy remains poorly understood, particularly in high-grade serous tubo-ovarian carcinomas (HGSC). We developed a series of mouse models that carry genotypes of human HGSCs and grow in syngeneic immunocompetent hosts to address this gap. We transformed murine-fallopian tube epithelial cells to phenocopy homologous recombination–deficient tumors through a combined loss of Trp53, Brca1, Pten, and Nf1 and overexpression of Myc and Trp53R172H, which was contrasted with an identical model carrying wild-type Brca1. For homologous recombination–proficient tumors, we constructed genotypes combining loss of Trp53 and overexpression of Ccne1, Akt2, and Trp53R172H, and driven by KRASG12V or Brd4 or Smarca4 overexpression. These lines form tumors recapitulating human disease, including genotype-driven responses to treatment, and enabled us to identify follistatin as a driver of resistance to checkpoint inhibitors. These data provide proof of concept that our models can identify new immunotherapy targets in HGSC. Significance: We engineered a panel of murine fallopian tube epithelial cells bearing mutations typical of HGSC and capable of forming tumors in syngeneic immunocompetent hosts. These models recapitulate tumor microenvironments and drug responses characteristic of human disease. In a Ccne1-overexpressing model, immune-checkpoint resistance was driven by follistatin. This article is highlighted in the In This Issue feature, p. 211

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  • Generation of multiple fallopian tube epithelial cell lines with combinations of common mutations in high-grade serous ovarian cancer using CRISPR/Cas9 recapitulated histopathological and clinical features observed in HGSOC patients, such as ascites and peritoneal metastases.

    “Generation of multiple fallopian tube epithelial cell lines with combinations of common mutations in HGSOC (Tp53, Brca1, Brca2, Ccne1, Akt2, Brd4, Smarca4, Kras, Myc, Nf1, and Pten) using CRISPR/Cas9 recapitulated histopathological and clinical features observed in HGSOC patients, such as ascites and peritoneal metastases (Iyer et al., 2021).”

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  1. [55]Kaneko H. Subchapter 33C - Follistatin. In: Takei Y, Ando H, Tsutsui K, editors. Handbook of Hormones. San Diego: Academic Press; 2016. p 298-e33C-2.

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Authors
Iyer, S., Zhang, S., Yucel, S., Horn, H., Smith, S. G., Reinhardt, F., Hoefsmit, E., Assatova, B., Casado, J., Meinsohn, M.-C., Barrasa, M. I., Bell, G. W., Pérez-Villatoro, F., Huhtinen, K., Hynninen, J., Oikkonen, J., Galhenage, P. M., Pathania, S., Hammond, P. T., Neel, B. G., Farkkila, A., Pépin, D., & Weinberg, R. A.
Affiliations
  • Whitehead Institute for Biomedical Research (US)
  • NYU Langone Health (US)
  • Broad Institute (US)
  • Massachusetts Institute of Technology (US)
  • 1Whitehead Institute for Biomedical Research, Cambridge, Massachusetts.
  • University of Helsinki (FI)
  • Harvard University (US)
  • 6Research Program in Systems Oncology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
  • University of Turku (FI)
  • University of Massachusetts Boston (US)
Corresponding author
  • Pépin, David
  • Weinberg, Robert A.
Venue
Cancer Discovery
Published
2021-02-01
Volume
11
Issue
2
Pages
384-407
ISSN
  • 2159-8274 (ISSN-L)
  • 2159-8290
OpenAlex
W3097756289
Cited by
136
References
83
Citations by year
2026: 20 · 2025: 33 · 2024: 24 · 2023: 21 · 2022: 22 · 2021: 13 · 2020: 3
FWCI
12.99
Type
journal article
Language
en
Open access
Locations
  • Cancer Discovery (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UTUPub (University of Turku) (submittedVersion)
Funders
  • NIH (R01 CA0784561, P01 CA080111)
  • Ovarian Cancer Research Program (W81XWH-17-1-0212)
  • US Army Medical Research (21702-5014)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian cancer diagnosis and treatment
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
Keywords
high-grade serous ovarian cancer, syngeneic mouse model, genetically engineered mouse models, combination immunotherapy, immunotherapy resistance, immune checkpoint inhibitors, follistatin, homologous recombination deficiency, BRCA1, PTEN, neurofibromatosis type 1, c-Myc, cyclin E1, KRAS G12V, BRD4, SMARCA4, tumor microenvironment, immunotherapy response prediction
MeSH terms
Immune Checkpoint Inhibitors, Animals, Disease Models, Animal, Drug Therapy, Combination, Fallopian Tube Neoplasms, Female, Mice, Transgenic, Ovarian Neoplasms, Cystadenocarcinoma, Serous

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