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Issue 20, 2018
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Zwitterionic diketopyrrolopyrrole for fluorescence/photoacoustic imaging guided photodynamic/photothermal therapy

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Abstract

Dual-modal imaging and dual-modal therapy provide multiple complementary theranostic features. The theranostic agent has favorable renal excretion and low cytotoxicity, making it of great interest in the nanomedical field. Herein, a water-soluble conjugated zwitterionic polymer (DPP-SPMA) with low-fouling and low cytotoxicity was prepared and used for fluorescence/PA imaging guided PTT/PDT therapy. The in vivo imaging results showed that the DPP-SPMA had excellent enhanced permeability and retention effects. The fluorescence imaging demonstrated that the DPP-SPMA was excreted by renal metabolism because the controlled molecular mass was less than the renal filtration threshold. The DPP-SPMA shows a photothermal effect under 730 nm irradiation and an excellent singlet oxygen generation capacity for the PDT therapy under 635 nm irradiation. The high accumulation of DPP-SPMA by passive targeting around the tumor stimulated excellent synergistic photodynamic therapy and photothermal therapy. As a result, the water-soluble zwitterion DPP-SPMA was well suited for fluorescence/PA dual-modal imaging and had significant antitumor activity in vivo via synergistic photodynamic therapy and photothermal therapy.

Graphical abstract: Zwitterionic diketopyrrolopyrrole for fluorescence/photoacoustic imaging guided photodynamic/photothermal therapy

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Publication details

The article was received on 11 Feb 2018, accepted on 12 Apr 2018 and first published on 13 Apr 2018


Article type: Paper
DOI: 10.1039/C8PY00244D
Citation: Polym. Chem., 2018,9, 2805-2812
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    Zwitterionic diketopyrrolopyrrole for fluorescence/photoacoustic imaging guided photodynamic/photothermal therapy

    W. Deng, Q. Wu, P. Sun, P. Yuan, X. Lu, Q. Fan and W. Huang, Polym. Chem., 2018, 9, 2805
    DOI: 10.1039/C8PY00244D

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