Phototoxicity of flavoprotein miniSOG induced by bioluminescence resonance energy transfer in genetically encoded system NanoLuc-miniSOG is comparable with its LED-excited phototoxicity

G. M. Proshkina, E. I. Shramova, O. N. Shilova, A. V. Ryabova, S. M. Deyev

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Photodynamic therapy (PDT) is a clinical, minimally invasive method for destroying cancer cells in the presence of a photosensitizer, oxygen, and a light source. The main obstacle for the PDT treatment of deep tumors is a strong reduction of the excitation light intensity as a result of its refraction, reflection, and absorption by biological tissues. Internal light sources based on bioluminescence resonance energy transfer can be a solution of this problem. Here we show that luciferase NanoLuc being expressed as a fusion protein with phototoxic flavoprotein miniSOG in cancer cells in the presence of furimazine (highly specific NanoLuc substrate) induces a photodynamic effect of miniSOG comparable with its LED-excited (Light Emitting Diode) phototoxicity. Luminescence systems based on furimazine and hybrid protein NanoLuc-miniSOG targeted to mitochondria or cellular membranes possess the similar energy transfer efficiencies and similar BRET-induced cytotoxic effects on cancer cells, though the mechanisms of BRET-induced cell death are different. As the main components of the proposed system for BRET-mediated PDT are genetically encoded (luciferase and phototoxic protein), this system can potentially be delivered to any site in the organism and thus may be considered as a promising approach for simultaneous delivery of light source and photosensitizer in deep-lying tumors and metastasis anywhere in the body.

Original languageEnglish
Pages (from-to)107-115
Number of pages9
JournalJournal of Photochemistry and Photobiology B: Biology
Volume188
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • Bioluminescence resonance energy transfer (BRET)
  • BRET efficiency
  • BRET-mediated phototoxicity
  • miniSOG
  • NanoLuc

ASJC Scopus subject areas

  • Biophysics
  • Radiation
  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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