Rationally designed anti-HER2/neu peptide mimetic disables p185(HER2/neu) tyrosine kinases in vitro and in vivo

Byeong Woo Park, Hong Tao Zhang, Chuanjin Wu, Alan Berezov, Xin Zhang, Raj Dua, Qiang Wang, Gary Kao, Donald M. O'Rourke, Mark I. Greene, Ramachandran Murali

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Abstract

Monoclonal antibodies specific for the p185(HER2/neu) growth factor receptor represent a significant advance in receptor-based therapy for p185(HER2/neu)-expressing human cancers. We have used a structure-based approach to develop a small (1.5 kDa) exocyclic anti-HER2/neu peptide mimic (AHNP) functionally similar to an anti-p185(HER2/neu) monoclonal antibody, 4D5 (Herceptin). The AHNP mimetic specifically binds to p185(HER2/neu) with high affinity (K(D) = 300 nM). This results in inhibition of proliferation of p185(HER2/neu)-overexpressing tumor cells, and inhibition of colony formation in vitro and growth of p185(HER2/neu)-expressing tumors in athymic mice. In addition, the mimetic sensitizes the tumor cells to apoptosis when used in conjunction with ionizing radiation or chemotherapeutic agents. A comparison of the molar quantities of the Herceptin antibody and the AHNP mimetic required for inhibiting cell growth and anchorage-independent growth showed generally similar activities. The structure-based derivation of the AHNP represents a novel strategy for the design of receptor-specific tumor therapies.

Original languageEnglish
Pages (from-to)194-198
Number of pages5
JournalNature Biotechnology
Volume18
Issue number2
DOIs
Publication statusPublished - 2000 Feb

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology
  • Molecular Medicine
  • Biomedical Engineering

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    Park, B. W., Zhang, H. T., Wu, C., Berezov, A., Zhang, X., Dua, R., Wang, Q., Kao, G., O'Rourke, D. M., Greene, M. I., & Murali, R. (2000). Rationally designed anti-HER2/neu peptide mimetic disables p185(HER2/neu) tyrosine kinases in vitro and in vivo. Nature Biotechnology, 18(2), 194-198. https://doi.org/10.1038/72651