Abstract
Zeolitic imidazolate framework (ZIF-8) base-aptamer “gate-lock” biomaterial probes have been synthesized for monitoring intracellular deoxynivalenol (DON) and cytochrome c (cyt c) levels. The aptamer and organic fluorescent dye were regarded as a recognition element and a sensing element, respectively. In the presence of DON, the aptamers of DON and cyt c were specifically bound with the DON and induced cyt c, leading to the dissociation of aptamers from the porous surface of the probes. The gate was subsequently opened to release methylene blue (MB) and Rhodamine 6G (Rh6G), and their fluorescence (emission of MB at 700 nm and Rh6G at 550 nm) significantly recovered within 6 h. Cell imaging successfully monitored the exposure of DON and the biological process of cyt c discharge triggered by the activation of the DON-induced apoptosis pathway. In addition, the response between DON and cyt c was observed during the apoptosis process, which is of high significance for the comprehensive and systematic development of mycotoxins cytotoxicity.
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Funding
This work was partially supported by the National Key Research and Development Program of China (2022YFF1103000), National Natural Science Foundation of China (32072310), Laboratory of Lingnan Modern Agriculture Project (NZ2021037), Jiangsu Agriculture Science and Technology Innovation Fund (CX (22)3006), Postdoctoral Science Foundation of Jiangsu Province (1701097B), Guangzhou Science and Technology Project (202206010096), and Collaborative innovation center of food safety and quality control in Jiangsu Province.
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Duan, N., He, C., Lin, X. et al. ZIF-8 base-aptamer “gate-lock” probes enable the visualization of a cascade response between deoxynivalenol and cytochrome c inside living cells. Microchim Acta 190, 39 (2023). https://doi.org/10.1007/s00604-022-05619-5
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DOI: https://doi.org/10.1007/s00604-022-05619-5