Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105237
Title: Development of a protein nanoparticle platform for targeting EGFR expressing cancer cells
Authors: Buecheler, Jakob W.
Howard, Christopher B.
de Bakker, Christopher J.
Goodall, Stephen
Jones, Martina L.
Win, Thinzar
Peng, Tao
Tan, Cher Heng
Chopra, Akhil
Mahler, Stephen M.
Lim, Sierin
Keywords: DRNTU::Engineering::Chemical engineering::Biotechnology
Issue Date: 2015
Source: Buecheler, J. W., Howard, C. B., de Bakker, C. J., Goodall, S., Jones, M. L., Win, T., et al. (2015). Development of a protein nanoparticle platform for targeting EGFR expressing cancer cells. Journal of chemical technology and biotechnology, 90(7), 1230-1236.
Series/Report no.: Journal of chemical technology and biotechnology
Abstract: BACKGROUND: A range of protein-based nanoparticles has been developed for cancer drug delivery and diagnostics. This includes the E2 protein derived from the pyruvate dehydrogenase complex in Geobacillus stearothermophilus which assembles into a 60-subunit protein cage structure that is capable of encapsulating cancer therapeutics. In this study antibody fragments targeting the epidermal growth factor receptor (EGFR) were tethered to the surface of E2 protein nanoparticles to determine whether the protein nanoparticles could be specifically targeted to EGFR overexpressing cancer cells. RESULTS: Variants of the anti-EGFR antibody fragment and the E2 protein containing specific cysteine residues (E2ΔN17A186C) were conjugated using a maleimide-specific crosslinker. Electron microscopy and dynamic light scattering analysis indicated that the cysteine modified E2 protein correctly assembled into a 25–30 nm particle. The conjugation of the anti-EGFR antibody fragment (26 kDa) with a subunit of the E2 protein (26 kDa) was confirmed by mass spectrometry with an estimated molecular weight of 52 kDa. The binding of the conjugated E2 particle to native EGFR on MDA MB 231 cells and recombinant EGFR was confirmed using flow cytometry and biolayer interferometry, respectively. CONCLUSIONS: In this study, proof-of-principle that an EGFR-targeting scFv can be stably conjugated to the cysteine variant E2ΔN17A186C protein nanoparticle without loss of targeting capability has been demonstrated. Conceptually scFv antibody fragments reactive with other important cancer targets could be utilized and presents the opportunity for generation of multi-targeted protein nanoparticles by conjugating various scFvs with different specificities on the same particle.
URI: https://hdl.handle.net/10356/105237
http://hdl.handle.net/10220/25969
ISSN: 0268-2575
DOI: 10.1002/jctb.4545
Rights: © 2014 Society of Chemical Industry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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