Cited by 284Hepatocellular Carcinoma Treatment and PrognosisColorectal Cancer Treatments and StudiesMelanoma and MAPK Pathways

In vivo RNAi screening identifies a mechanism of sorafenib resistance in liver cancer

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Rudalska, Ramona, Dauch, Daniel, Longerich, Thomas, McJunkin, Katherine, Wuestefeld, Torsten, Kang, Tae-Won, Hohmeyer, Anja, Pesic, Marina +13 more·2014·Nature Medicine

Abstract

In solid tumors, resistance to therapy inevitably develops upon treatment with cytotoxic drugs or molecularly targeted therapies. Here, we describe a system that enables pooled shRNA screening directly in mouse hepatocellular carcinomas (HCC) in vivo to identify genes likely to be involved in therapy resistance. Using a focused shRNA library targeting genes located within focal genomic amplifications of human HCC, we screened for genes whose inhibition increased the therapeutic efficacy of the multikinase inhibitor sorafenib. Both shRNA-mediated and pharmacological silencing of Mapk14 (p38α) were found to sensitize mouse HCC to sorafenib therapy and prolong survival by abrogating Mapk14-dependent activation of Mek-Erk and Atf2 signaling. Elevated Mapk14-Atf2 signaling predicted poor response to sorafenib therapy in human HCC, and sorafenib resistance of p-Mapk14-expressing HCC cells could be reverted by silencing Mapk14. Our results suggest that a combination of sorafenib and Mapk14 blockade is a promising approach to overcoming therapy resistance of human HCC.

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Authors
Rudalska, R., Dauch, D., Longerich, T., McJunkin, K., Wuestefeld, T., Kang, T.-W., Hohmeyer, A., Pesic, M., Leibold, J., von Thun, A., Schirmacher, P., Zuber, J., Weiss, K.-H., Powers, S., Malek, N. P., Eilers, M., Sipos, B., Lowe, S. W., Geffers, R., Laufer, S., & Zender, L.
Affiliations
  • University of Tübingen (DE)
  • University Hospital Heidelberg (DE)
  • Cold Spring Harbor Laboratory (US)
  • German Cancer Research Center (DE)
  • Research Institute of Molecular Pathology (AT)
  • University of Würzburg (DE)
  • Memorial Sloan Kettering Cancer Center (US)
  • Helmholtz Centre for Infection Research (DE)
Corresponding author
Zender, Lars
Venue
Nature Medicine
Published
2014-09-14
Volume
20
Issue
10
Pages
1138-1146
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W2019218097
Cited by
282
References
39
Citations by year
2026: 2 · 2025: 18 · 2024: 12 · 2023: 14 · 2022: 26 · 2021: 35 · 2020: 17 · 2019: 31 · 2018: 27 · 2017: 30 · 2016: 30 · 2015: 37 · 2014: 3
FWCI
18.60
Type
journal article
Language
en
Open access
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (submittedVersion)
Funders
National Cancer Institute (U01CA168409, P01CA013106, P30CA008748)
Topics
  • Health Sciences › Medicine › Hepatology › Hepatocellular Carcinoma Treatment and Prognosis
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
sorafenib resistance, hepatocellular carcinoma, MAPK14, p38 MAPK, shRNA library, in vivo gene silencing, MEK/ERK signaling, multikinase inhibitor, combination therapy, drug resistance
MeSH terms
Sorafenib, Animals, Antineoplastic Agents, Female, Carcinoma, Hepatocellular, Humans, Liver Neoplasms, Liver Neoplasms, Experimental, Male, Mice, Inbred C57BL, Niacinamide, Phenylurea Compounds, Signal Transduction, Drug Resistance, Neoplasm, MAP Kinase Signaling System, Xenograft Model Antitumor Assays, RNA Interference, RNA, Small Interfering, Protein Kinase Inhibitors, Mitogen-Activated Protein Kinase 14, Mice, Activating Transcription Factor 2

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