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Forster resonance energy transfer properties of a new type of near-infrared excitation PDT photosensitizer: CuInS2/ZnS quantum dots-5-aminolevulinic acid conjugates

机译:福尔斯特共振能量转移性能新型近红外激发PDT光敏剂:Cuins2 / ZnS量子点-5-氨基纤维酸缀合物

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摘要

Recently, near-infrared (NIR) excitation has been suggested for PDT improvement and therapy of cancer. In this study, 5-aminolevulinic acid (ALA), a photosensitizer used for photodynamic therapy (PDT) of cancer, was coordinated to CuInS2/ZnS (CIS/ZnS) QDs to form CIS/ZnS-ALA conjugates, by chemical bonding. An efficient transfer of energy from the donor (QDs) to the acceptor (ALA) was demonstrated through Forster resonance energy transfer (FRET), and the FRET efficiency of QDs-ALA system can reach as high as 58.49% under near-infrared excitation. The optical properties (fluorescence spectra, Fourier transform-infrared spectra and fluorescence lifetimes) were also determined for the conjugates. In addition, the PDT killing in vitro was further achieved under the 800 nm and 1300 nm femtosecond laser pulses. These results demonstrate that the CIS/ZnS-ALA conjugates are promising for PDT and needed to be investigated further.
机译:最近,已经提出了近红外(NIR)激发用于PDT改善和癌症治疗。 在该研究中,5-氨基乙酰丙烯酸(ALA),用于光动力治疗(PDT)的癌症的光敏剂,与CIS2 / ZNS(CIS / ZnS)QDS进行协调,通过化学键合形成顺式/ ZnS-Ala缀合物。 通过Forster Arsonance能量转移(FRET)证明了从供体(QDS)到受体(ALA)的能量的有效转移,并且QDS-ALA系统的FRET效率在近红外激发下可以高达58.49%。 还测定缀合物的光学性质(荧光光谱,傅里叶变换 - 红外光谱和荧光寿命)。 此外,在800nm和1300nm femtosecond激光脉冲下进一步实现了体外PDT杀伤。 这些结果表明,CIS / ZnS-Ala缀合物对PDT进行了前途,并且需要进一步研究。

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  • 来源
    《RSC Advances》 |2016年第60期|共9页
  • 作者单位

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

    Changchun Univ Sci &

    Technol Int Joint Res Ctr Nanophoton &

    Biophoton Sch Sci Changchun 130000 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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