Cited by 344Prostate Cancer Treatment and ResearchHER2/EGFR in Cancer ResearchEstrogen and related hormone effects

HER2/neu kinase-dependent modulation of androgen receptor function through effects on DNA binding and stability.

Open access
Mellinghoff, Ingo K., Vivanco, Igor, Kwon, Andrew, Tran, Chris, Wongvipat, John, Sawyers, Charles L.·2004·Cancer Cell

Abstract

Given the role of the EGFR/HER2 family of tyrosine kinases in breast cancer, we dissected the molecular basis of EGFR/HER2 kinase signaling in prostate cancer. Using the small molecule dual EGFR/HER2 inhibitor PKI-166, we show that the biologic effects of EGFR/HER-2 pathway inhibition are caused by reduced AR transcriptional activity. Additional genetic and pharmacologic experiments show that this modulation of AR function is mediated by the HER2/ERBB3 pathway, not by EGFR. This HER2/ERBB3 signal stabilizes AR protein levels and optimizes binding of AR to promoter/enhancer regions of androgen-regulated genes. Surprisingly, the downstream signaling pathway responsible for these effects appears to involve kinases other than Akt. These data suggest that the HER2/ERBB3 pathway is a critical target in hormone-refractory prostate cancer.

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Registry

Crossref · 10.1016/j.ccr.2004.09.031

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  • Akt has both agonistic and antagonistic influence on AR activity, either through direct phosphorylation of the receptor or through the action of downstream effectors, in both the presence and absence of androgen.

    “Akt has been shown to have both agonistic and antagonistic influence on AR activity, either through direct phosphorylation of the receptor or through the action of downstream effectors, in both the presence and absence of androgen (49 -51).”

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Authors
Mellinghoff, I. K., Vivanco, I., Kwon, A., Tran, C., Wongvipat, J., & Sawyers, C. L.
Affiliations
  • University of California, Los Angeles (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Sawyers, Charles L.
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2004-11
Volume
6
Issue
5
Pages
517-527
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2077863736
Cited by
344
References
80
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 15 · 2022: 6 · 2021: 10 · 2020: 10 · 2019: 6 · 2018: 10 · 2017: 15 · 2016: 16 · 2015: 17 · 2014: 17 · 2013: 20 · 2012: 23
FWCI
19.11
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
Keywords
HER2/neu, androgen receptor, HER3, prostate cancer, castration-resistant prostate cancer, protein stability, DNA binding, transcriptional activity, Akt-independent signaling, tyrosine kinase inhibitors
MeSH terms
Animals, Chlorocebus aethiops, DNA, Neoplasm, Humans, Male, Prostatic Neoplasms, Proto-Oncogene Proteins, Pyrimidines, Pyrroles, Receptors, Androgen, Transfection, Tumor Cells, Cultured, Signal Transduction, Protein Serine-Threonine Kinases, Receptor, ErbB-2, Erb-b2 Receptor Tyrosine Kinases, COS Cells, RNA, Small Interfering, Proto-Oncogene Proteins c-akt, ErbB Receptors

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