Cited by 73Genetic factors in colorectal cancerColorectal Cancer Treatments and StudiesHER2/EGFR in Cancer Research

Activating ERBB2/HER2 mutations indicate susceptibility to pan-HER inhibitors in Lynch and Lynch-like colorectal cancer

Kloth, Michael, Ruesseler, Vanessa, Engel, Christoph, Koenig, Katharina, Peifer, Martin, Mariotti, Erika, Kuenstlinger, Helen, Florin, Alexandra +14 more·2016·Gut

Abstract

Objective: Microsatellite instability (MSI) is detected in approximately 15% of all colorectal cancers (CRC) and virtually in all cases with Lynch syndrome. The MSI phenotype is caused by dysfunctional mismatch repair (MMR) and leads to accumulation of DNA replication errors. Sporadic MSI CRC often harbours BRAF V600E ; however, no consistent data exist regarding targeted treatment approaches in BRAF wt MSI CRC. Design: Mutations and quantitative MSI were analysed by deep sequencing in 196 formalin fixed paraffin embedded (FFPE) specimens comprising Lynch and Lynch-like CRCs from the German Hereditary Nonpolyposis Colorectal Cancer registry. Functional relevance of recurrent ERBB2/HER2 mutations was investigated in CRC cell lines using reversible and irreversible HER-targeting inhibitors, EGFR-directed antibody cetuximab, HER2-directed antibody trastuzumab and siRNA-mediated ERBB2/HER2 knockdown. Results: Quantification of nucleotide loss in non-coding mononucleotide repeats distinguished microsatellite status with very high accuracy (area under curve=0.9998) and demonstrated progressive losses with deeper invasion of MMR-deficient colorectal neoplasms (p=0.008). Characterisation of BRAF wt MSI CRC revealed hot-spot mutations in well-known oncogenic drivers, including KRAS (38.7%), PIK3CA (36.5%), and ERBB2 (15.0%). L755S and V842I substitutions in ERBB2 were highly recurrent. Functional analyses in ERBB2-mutated MSI CRC cell lines revealed a differential response to HER-targeting compounds and superiority of irreversible pan-HER inhibitors. Conclusions: We developed a high-throughput deep sequencing approach for concomitant MSI and mutational analyses in FFPE specimens. We provided novel insights into clinically relevant alterations in MSI CRC and a rationale for targeting ERBB2/HER2 mutations in Lynch and Lynch-like CRC.

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Crossref · 10.1136/gutjnl-2014-309026

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Authors
Kloth, M., Ruesseler, V., Engel, C., Koenig, K., Peifer, M., Mariotti, E., Kuenstlinger, H., Florin, A., Rommerscheidt-Fuss, U., Koitzsch, U., Wodtke, C., Ueckeroth, F., Holzapfel, S., Aretz, S., Propping, P., Loeffler, M., Merkelbach-Bruse, S., Odenthal, M., Friedrichs, N., Heukamp, L. C., Zander, T., & Buettner, R.
Affiliations
  • University Hospital Cologne (DE)
  • Institute of Pathology, Centre for Integrated Oncology, University Hospital Cologne, Cologne, Germany
  • Leipzig University (DE)
  • University of Cologne (DE)
  • University Hospital Bonn (DE)
Corresponding author
Zander, Thomas
Venue
Gut
Publisher
BMJ
Published
2015-04-28
Volume
65
Issue
8
Pages
1296-1305
ISSN
  • 0017-5749 (ISSN-L)
  • 1468-3288
OpenAlex
W2116599261
Cited by
73
References
46
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 6 · 2022: 9 · 2021: 16 · 2020: 4 · 2019: 6 · 2018: 9 · 2017: 4 · 2016: 6 · 2015: 6
FWCI
6.61
Type
journal article
Language
en
Open access
closed
Locations
  • Gut (publishedVersion)
  • PubMed (publishedVersion)
  • Kölner Universitäts PublikationsServer (Universität zu Köln) (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
Universitätsklinikum Köln
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
Keywords
Lynch syndrome, microsatellite instability, pan-HER inhibitor, mismatch repair deficiency, KRAS mutation, PIK3CA mutation, cetuximab, trastuzumab, colorectal cancer cell lines
MeSH terms
Cetuximab, Trastuzumab, Pharmacogenomic Testing, Antineoplastic Agents, Colorectal Neoplasms, Hereditary Nonpolyposis, Female, Humans, Male, Middle Aged, Colorectal Neoplasms, Erb-b2 Receptor Tyrosine Kinases, Cell Culture Techniques, Microsatellite Instability, DNA Mismatch Repair, ErbB Receptors

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