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Metal–Organic‐Framework‐Assisted In Vivo Bacterial Metabolic Labeling and Precise Antibacterial Therapy
Author(s) -
Mao Duo,
Hu Fang,
Ji Shenglu,
Wu Wenbo,
Ding Dan,
Kong Deling,
Liu Bin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201706831
Subject(s) - photosensitizer , in vivo , bacteria , nanocarriers , photodynamic therapy , fluorescence , materials science , nanotechnology , click chemistry , bacterial cell structure , biophysics , nanoparticle , combinatorial chemistry , chemistry , photochemistry , biology , organic chemistry , microbiology and biotechnology , genetics , physics , quantum mechanics
Bacterial infection is one of the most serious physiological conditions threatening human health. There is an increasing demand for more effective bacterial diagnosis and treatment through noninvasive theranostic approaches. Herein, a new strategy is reported to achieve in vivo metabolic labeling of bacteria through the use of MIL‐100 (Fe) nanoparticles (NPs) as the nanocarrier for precise delivery of 3‐azido‐ d ‐alanine ( d ‐AzAla). After intravenous injection, MIL‐100 (Fe) NPs can accumulate preferentially and degrade rapidly within the high H 2 O 2 inflammatory environment, releasing d ‐AzAla in the process. d ‐AzAla is selectively integrated into the cell walls of bacteria, which is confirmed by fluorescence signals from clickable DBCO‐Cy5. Ultrasmall photosensitizer NPs with aggregation‐induced emission characteristics are subsequently designed to react with the modified bacteria through in vivo click chemistry. Through photodynamic therapy, the amount of bacteria on the infected tissue can be significantly reduced. Overall, this study demonstrates the advantages of metal–organic‐framework‐assisted bacteria metabolic labeling strategy for precise bacterial detection and therapy guided by fluorescence imaging.