Selective delivery of PEGylated compounds to tumor cells by anti-PEG hybrid antibodies

Hsin Yi Tung, Yu Cheng Su, Bing Mae Chen, Pierre Alain Burnouf, Wei Chiao Huang, Kuo Hsiang Chuang, Yu Ting Yan, Tian Lu Cheng, Steve R. Roffler

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Polyethylene glycol (PEG) is attached to many peptides, proteins, liposomes, and nanoparticles to reduce their immunogenicity and improve their pharmacokinetic and therapeutic properties. Here, we describe hybrid antibodies that can selectively deliver PEGylated medicines, imaging agents, or nanomedicines to target cells. Human IgG1 hybrid antibodies αPEG:αHER2 and αPEG:a CD19were shown by ELISA, FACS, and plasmonresonance to bind to both PEG and HER2 receptors on SK-BR-3 breast adenocarcinoma and BT-474 breast ductal carcinoma cells or CD19 receptors on Ramos and Raji Burkitt's lymphoma cells. In addition, αPEG:α HER2 specifically targeted PEGylated proteins, liposomes, and nanoparticles to SK-BR-3 cells that overexpressed HER2, but not toHER2-negativeMCF-7 breast adenocarcinoma cells. Endocytosis of PEGylated nanoparticles into SK-BR-3 cells was induced specifically by the αPEG:αHER2 hybrid antibody, as observed by confocal imaging of the accumulation of Qdots inside SK-BR-3 cells. Treatment of HER2+ SK-BR-3 and BT-474 cancer cells with αPEG:α HER2 and the clinically used chemotherapeutic agent PEGylated liposomal doxorubicin for 3 hours enhanced the in vitro effectiveness of PEGylated liposomal doxorubicin by over two orders of magnitude. Hybrid anti-PEG antibodies offer a versatile and simple method to deliver PEGylated compounds to cellular locations and can potentially enhance the therapeutic efficacy of PEGylated medicines.

Original languageEnglish
Pages (from-to)1317-1326
Number of pages10
JournalMolecular Cancer Therapeutics
Issue number6
Publication statusPublished - Jun 1 2015

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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