Genetically Encoded Immunophotosensitizer

被引:3
作者
Serebrovskaya, E. O. [1 ]
Stremovsky, O. A. [1 ]
Chudakov, D. M. [1 ]
Lukyanov, K. A. [1 ]
Deyev, S. M. [1 ]
机构
[1] Russian Acad Sci, Shemyakin Ovchinnikov Inst Bioorgan Chem, Moscow 117997, Russia
基金
俄罗斯基础研究基金会;
关键词
photoimmunotherapy; photosensitizer; fluorescent protein; miniantibody; HER2/neu; MONOCLONAL-ANTIBODIES; PHOTODYNAMIC THERAPY; FLUORESCENT PROTEIN; CANCER-CELLS; PHOTOSENSITIZER; CHROMOPHORE; STABILITY; CATALYSIS; OXIDATION;
D O I
10.1134/S1068162011010134
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Conjugates of antibodies with photosensitizers are successfully used for the targeted killing of cancer cells bearing particular surface markers by the method known as photoimmunotherapy. However, the chemical conjugation of photosensitizers with antibodies poses a number of problems. Among these are a low reproducibility, aggregation, and the presence of impurities of the unconjugated photosensitizer. Here we describe a method of designing a fully genetically encoded immunophotosensitizer, which consists of the anti-HER2/neu miniantibody 4D5scFv as a targeting molecule and the phototoxic fluorescent protein KillerRed as a photosensitizing molecule. Both domains in the recombinant protein retained their functional properties: a high affinity for the HER2/neu antigen and phototoxicity. The recombinant protein 4D5scFv-KillerRed showed a high specificity for HER2/neu-overexpressing cancer cells and effectively lowered their viability upon irradiation.
引用
收藏
页码:123 / 129
页数:7
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