Selenium-doped two-photon fluorescent carbon nanodots for in-situ free radical scavenging in mitochondria.


College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China. Electronic address: [Email]


Mitochondrial oxidative stress is associated with the occurrence and development of a wide range of human diseases. The development of methodologies to alleviate oxidative stress-mediated injury may have therapeutic potential. Herein, we report the design and preparation of triphenylphosphonium-functionalized selenium-doped carbon nanodots (TPP-Se-CDs) that can efficiently scavenging hydroxyl radicals (OH) and superoxide anions (O2-) in mitochondria region. Se-CDs with two-photon blue fluorescence were initially prepared by facile hydrothermal treatment of selenomethionine, followed by the covalent conjugation with TPP. The as-obtained TPP-Se-CDs showed high colloidal stability, strong scavenging abilities towards OH and O2-. Moreover, TPP-Se-CDs exhibited low cytotoxicity and mitochondria targeting ability. Taking advantages of these prominent features, TPP-Se-CDs have been successfully applied to combat H2O2 and phorbol 12-myristate 13-acetate (PMA) induced oxidative stress in mitochondria.


Carbon nanodots,Free radical scavenging,In situ,Mitochondria targeted,Se-doped,Two-photon fluorescence,

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