Genetically encoded immunophotosensitizer 4D5scFv-miniSOG is a highly selective agent for targeted photokilling of tumor cells in vitro

Kristina E. Mironova, Galina M. Proshkina, Anastasiya V. Ryabova, Oleg A. Stremovskiy, Sergey A. Lukyanov, Rem V. Petrov, Sergey M. Deyev

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Tumor-targeted delivery of cytotoxins presents considerable advantages over their passive transport. Chemical conjugation of cytotoxic module to antibody is limited due to insufficient reproducibility of synthesis, and recombinant immunotoxins are aimed to overcome this disadvantage. We obtained genetically encoded immunophotosensitizer 4D5scFv-miniSOG and evaluated its photocytotoxic effect in vitro. A single-chain variable fragment (scFv) of humanized 4D5 antibody was used as a targeting vehicle for selective recognition of the extracellular domain of human epidermal growth factor receptor 2 (HER2/neu) overexpressed in many human carcinomas. As a phototoxic module we used a recently described photoactivated fluorescent flavoprotein miniSOG. We found that recombinant protein 4D5scFv-miniSOG exerts a highly specific photo-induced cytotoxic effect on HER2/neu-positive human breast adenocarcinoma SK-BR-3 cells (IC50= 160 nM). We demonstrated that the 4D5scFv-miniSOG specifically binds to HER2-positive cells and internalizes via receptor-mediated endocytosis. Co-treatment of breast cancer cells with 4D5scFv-miniSOG and Taxol or junction opener protein JO-1 produced remarkable additive effects.

Original languageEnglish
Pages (from-to)831-840
Number of pages10
JournalTheranostics
Volume3
Issue number11
DOIs
Publication statusPublished - 2013
Externally publishedYes

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Antibodies, Monoclonal, Humanized
Immunotoxins
Flavoproteins
Single-Chain Antibodies
Neoplasms
Cytotoxins
Endocytosis
Paclitaxel
Recombinant Proteins
Inhibitory Concentration 50
Adenocarcinoma
Breast
Breast Neoplasms
Carcinoma
Antibodies
In Vitro Techniques
Proteins
human ERBB2 protein

Keywords

  • HER2/neu
  • Immunophototoxin
  • Phototoxicity
  • Single-chain variable fragment.
  • Tumor-targeted delivery

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Pharmacology, Toxicology and Pharmaceutics (miscellaneous)

Cite this

Genetically encoded immunophotosensitizer 4D5scFv-miniSOG is a highly selective agent for targeted photokilling of tumor cells in vitro. / Mironova, Kristina E.; Proshkina, Galina M.; Ryabova, Anastasiya V.; Stremovskiy, Oleg A.; Lukyanov, Sergey A.; Petrov, Rem V.; Deyev, Sergey M.

In: Theranostics, Vol. 3, No. 11, 2013, p. 831-840.

Research output: Contribution to journalArticle

Mironova, Kristina E. ; Proshkina, Galina M. ; Ryabova, Anastasiya V. ; Stremovskiy, Oleg A. ; Lukyanov, Sergey A. ; Petrov, Rem V. ; Deyev, Sergey M. / Genetically encoded immunophotosensitizer 4D5scFv-miniSOG is a highly selective agent for targeted photokilling of tumor cells in vitro. In: Theranostics. 2013 ; Vol. 3, No. 11. pp. 831-840.
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