Cited by 37Ubiquitin and proteasome pathwaysHER2/EGFR in Cancer ResearchProtein Degradation and Inhibitors

Degradation of HER2 by Cbl-Based Chimeric Ubiquitin Ligases

Li, Xia, Shen, Liangliang, Zhang, Jing, Su, Jin, Shen, Lan, Liu, Xinping, Han, Hua, Han, Wei +1 more·2007·Cancer Research

Abstract

Targeting disease-causing proteins for ubiquitination and degradation by chimeric molecules represents a promising alternative therapeutic strategy in cancer. Here, several Cbl-based chimeric ubiquitin ligases were recombined to achieve effective down-regulation of HER2. These chimeric molecules consisted of the Cbl NH2-terminal tyrosine kinase binding domain, linker, and RING domain, with the Src homology 2 domain replaced with that from growth factor receptor binding protein 2 (Grb2), Grb7, p85, or Src. The chimeric proteins not only interacted with HER2 but also enhanced the down-regulation of endogenous overexpressed HER2. After the chimeric proteins were introduced into HER2-overexpressing breast cancer SK-BR-3 cells or ovarian cancer SK-OV-3 cells, they effectively promoted HER2 ubiquitination and degradation in a RING finger domain–dependent manner. Consequently, expression of these chimeric molecules led to an inhibition of colony formation, increased the proportion of cells in the G1 cycle, and suppressed tumorigenicity. Collectively, our findings suggest that the Cbl-based chimeric ubiquitin ligases designed in the present study may represent a novel approach for the targeted therapy of HER2-overexpressing cancers. [Cancer Res 2007;67(18):8716–24]

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Crossref · 10.1158/0008-5472.can-06-3731

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  • Other groups have reported fusion bioPROTACs that degraded HER2, MYC and KRAS and demonstrated therapeutically relevant effects in human cancer cell lines and mouse xenograft tumour models overexpressing these POIs.

    “Since then, other groups have reported fusion bioPROTACs that degraded the cancer targets human epidermal growth factor receptor 2 (HER2), MYC and KRAS and demonstrated therapeutically relevant effects in human cancer cell lines and mouse xenograft tumour models overexpressing these POIs16,17,211,212.”

    From PROTAC targeted protein degraders: the past is prologue (2022) · cites this paper as [211]

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Authors
Li, X., Shen, L., Zhang, J., Su, J., Shen, L., Liu, X., Han, H., Han, W., & Yao, L.
Affiliations
  • State Key Laboratory of Cancer Biology (CN)
  • 2Department of Medical Genetics and Developmental Biology; and
  • Air Force Medical University (CN)
Venue
Cancer Research
Published
2007-09-15
Volume
67
Issue
18
Pages
8716-8724
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2135743114
Cited by
37
References
51
Citations by year
2026: 2 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 4 · 2016: 5 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
0.79
Type
journal article
Language
en
Open access
closed
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
Keywords
HER2, CBL, protein degradation, ubiquitination, RING domain, Grb2, Grb7, p85, SH2 domain, breast cancer, ovarian cancer, targeted therapy, G1 cell cycle arrest, tumorigenicity suppression
MeSH terms
Animals, Breast Neoplasms, Cell Cycle, Female, Humans, Mice, Nude, Ovarian Neoplasms, Recombinant Fusion Proteins, Transfection, Down-Regulation, Protein Structure, Tertiary, Erb-b2 Receptor Tyrosine Kinases, src Homology Domains, Xenograft Model Antitumor Assays, Cell Line, Tumor, Cell Growth Processes, Proto-Oncogene Proteins c-cbl, Mice

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