Neuregulin receptor-mediated gene transfer by human epidermal growth factor receptor 2-targeted antibodies and neuregulin-1.

Abstract:

:The human epidermal growth factor receptors 2, 3, and 4 (HER2, HER3, and HER4, respectively) are frequently overexpressed in many human cancers, and therefore may be potential targets for receptor-mediated gene transfer. To evaluate this possibility, we constructed a series of HER-targeted gene transfer vehicles by covalently linking poly-L-lysine polymers (pLYS) to the epidermal growth factor-like domain of the HER ligand neuregulin-1 (NRG1(177-244)), a HER2 antibody (Ab), and the Fab fragment of the HER2 Ab. In vitro, pLYS modification of NRG1(177-244) decreased the affinity of the ligand for HER3 or HER4 homodimer receptors by 6- to 7-fold. DNA loading of the pLYS-modified NRG1(177-244) had a minimal additional affect on the affinity of the complex for its receptor. In cell lines engineered to solely express HER2, HER3, or HER4, each vehicle correctly targeted the receptors; the NRG1(177-244) construct transferred a luciferase gene only into cells expressing HER4, whereas the HER2 Ab and Fab constructs transferred the reporter gene only into cells expressing HER2. The most efficient gene transfer occurred using the intact HER2 Ab as a gene transfer vehicle, whereas the Fab fragment of the HER2 Ab was the least efficient, and NRG1(177-244) was intermediate. These studies suggest that the NRG receptor or HER2, a component of the receptor, can be pursued as targets for gene transfer.

journal_name

Cancer Gene Ther

journal_title

Cancer gene therapy

authors

Kern JA,Wakita R,Sliwkowski MX

doi

10.1038/sj.cgt.7700069

subject

Has Abstract

pub_date

1999-11-01 00:00:00

pages

537-45

issue

6

eissn

0929-1903

issn

1476-5500

journal_volume

6

pub_type

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