Cited by 149Nanoparticle-Based Drug DeliveryBacteriophages and microbial interactionsNanoplatforms for cancer theranostics

Killing cancer cells by targeted drug-carrying phage nanomedicines

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Bar, Hagit, Yacoby, Iftach, Benhar, Itai·2008·BMC Biotechnology

Abstract

Background: Systemic administration of chemotherapeutic agents, in addition to its anti-tumor benefits, results in indiscriminate drug distribution and severe toxicity. This shortcoming may be overcome by targeted drug-carrying platforms that ferry the drug to the tumor site while limiting exposure to non-target tissues and organs. Results: We present a new form of targeted anti-cancer therapy in the form of targeted drug-carrying phage nanoparticles. Our approach is based on genetically-modified and chemically manipulated filamentous bacteriophages. The genetic manipulation endows the phages with the ability to display a host-specificity-conferring ligand. The phages are loaded with a large payload of a cytotoxic drug by chemical conjugation. In the presented examples we used anti ErbB2 and anti ERGR antibodies as targeting moieties, the drug hygromycin conjugated to the phages by a covalent amide bond, or the drug doxorubicin conjugated to genetically-engineered cathepsin-B sites on the phage coat. We show that targeting of phage nanomedicines via specific antibodies to receptors on cancer cell membranes results in endocytosis, intracellular degradation, and drug release, resulting in growth inhibition of the target cells in vitro with a potentiation factor of >1000 over the corresponding free drugs. Conclusion: The results of the proof-of concept study presented here reveal important features regarding the potential of filamentous phages to serve as drug-delivery platform, on the affect of drug solubility or hydrophobicity on the target specificity of the platform and on the effect of drug release mechanism on the potency of the platform. These results define targeted drug-carrying filamentous phage nanoparticles as a unique type of antibody-drug conjugates.

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  • Two-dimensional monolayer cultures of human or murine cancer cell lines serve as preliminary models to evaluate phage targeting, transduction efficiency, and cytotoxic effects.

    “Two-dimensional (2D) monolayer cultures of human or murine cancer cell lines serve as preliminary models to evaluate phage targeting, transduction efficiency, and cytotoxic effects [93,95,104,105]”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [93]

    The Methods (Cell lines and Cell viability assay; page not provided) describe human cancer cell lines grown in culture and tested for phage-mediated cell killing. The Results (Binding analysis; page not provided) assess phage targeting. The paper does not report murine cancer cell cultures or measure transduction efficiency; its confocal microscopy method examines phage internalization, which is not the same measure. (LLM, conf=0.88)

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Authors
Bar, H., Yacoby, I., & Benhar, I.
Affiliations
Tel Aviv University (IL)
Corresponding author
Benhar, Itai
Venue
BMC Biotechnology
Published
2008-04-03
Volume
8
Issue
1
Pages
37-37
ISSN
1472-6750 (ISSN-L)
OpenAlex
W2083473010
Cited by
149
References
59
Citations by year
2026: 6 · 2025: 2 · 2024: 10 · 2023: 11 · 2022: 6 · 2021: 9 · 2020: 7 · 2019: 6 · 2018: 5 · 2017: 4 · 2016: 17 · 2015: 6 · 2014: 10 · 2013: 5 · 2012: 13
FWCI
4.59
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Biotechnology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Israel Cancer Association
Topics
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Physical Sciences › Environmental Science › Ecology › Bacteriophages and microbial interactions
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
Keywords
filamentous bacteriophage, targeted drug delivery, antibody-drug conjugates, ERBB2, hygromycin, doxorubicin, cathepsin B, phage display, endocytosis, intracellular drug release, tumor targeting, drug potency
MeSH terms
Bacteriophages, Carcinoma, Cell Survival, Humans, Viral Proteins, Drug Delivery Systems, Cell Line, Tumor, Nanostructures, Nanomedicine

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