Volume 61, Issue 2 e202109068
Research Article

NIR-II Hydrogen-Bonded Organic Frameworks (HOFs) Used for Target-Specific Amyloid-β Photooxygenation in an Alzheimer's Disease Model

Haochen Zhang

Haochen Zhang

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

These authors contributed equally to this work.

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Dongqin Yu

Dongqin Yu

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

These authors contributed equally to this work.

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Shuting Liu

Shuting Liu

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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Chun Liu

Chun Liu

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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Zhenqi Liu

Zhenqi Liu

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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Prof. Jinsong Ren

Prof. Jinsong Ren

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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Prof. Xiaogang Qu

Corresponding Author

Prof. Xiaogang Qu

Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022 P. R. China

University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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First published: 04 November 2021
Citations: 98

Graphical Abstract

NIR-II hydrogen-bonded organic frameworks (HOFs) were devised to oxidize β-amyloid spatiotemporally and noninvasively. The well-designed photocatalyst shows an inhibitory effect of Aβ aggregation and recovery of memory deficits in triple-transgenic AD model mice upon the NIR-II irradiation.

Abstract

Phototherapy has emerged as a powerful approach for interrupting β-amyloid (Aβ) self-assembly. However, deeper tissue penetration and safer photosensitizers are urgent to be exploited for avoiding damaging nearby normal tissues and improving therapeutic effectiveness. A hydrogen-bonded organic framework (HOF)-based NIR-II photooxygenation catalyst is presented here to settle the abovementioned challenges. By encapsulating the pyridinium hemicyanine dye DSM with a large two-photon absorption (TPA) cross-section in NIR-II window into the porphyrin-based HOF, the resultant DSM@n-HOF-6 exhibits significant two-photon NIR-II-excited Fluorescence Resonance Energy Transfer (FRET) to generate singlet oxygen (1O2) for Aβ oxidation. Further, the target peptides of KLVFFAED (KD8) are covalently grafted on DSM@n-HOF-6 to enhance the blood–brain barrier (BBB) permeability and Aβ selectivity. The HOF-based photooxygenation catalyst shows an outstanding inhibitory effect of Aβ aggregation upon the NIR-II irradiation. Further in vivo studies demonstrate the obvious decrease of craniocerebral Aβ plaques and recovery of memory deficits in triple-transgenic AD (3×Tg-AD) model mice.

Conflict of interest

The authors declare no conflict of interest.

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