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Directly observing intracellular nanoparticle formation with nanocomputed tomography.


ABSTRACT: Directly observing intracellular nanostructure formation remains challenging. In this work, using a rationally designed small-molecule 4-nitrobenzyl carbamate-Cys(SEt)-Asp-Asp-Phe(iodine)-2-cyano-benzothiazole (NBC-Iod-CBT), we directly observed intracellular nanoparticle formation with nanocomputed tomography (nano-CT). In vitro, upon glutathione reduction and nitroreductase (NTR) cleavage, NBC-Iod-CBT undergoes a CBT-Cys click condensation reaction to self-assemble nanoparticles Iod-CBT-NPs with an average linear absorption coefficient (LAC) value of 0.182 ± 0.078 ?m-1 to x-ray. Nano-CT imaging of the NBC-Iod-CBT-treated, NTR-overexpressing HeLa cells showed the existence of Iod-CBT-NPs in their cytoplasm with an average LAC value of 0.172 ± 0.032 ?m-1 We anticipate that our strategy could help people to deeply understand the formation mechanism of intracellular nanostructures in the near future.

SUBMITTER: Zhang M 

PROVIDER: S-EPMC7608822 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Directly observing intracellular nanoparticle formation with nanocomputed tomography.

Zhang Miaomiao M   Guan Yong Y   Dang Zheng Z   Zhang Pinggen P   Zheng Zhen Z   Chen Liang L   Kuang Wen W   Wang Chenchen C   Liang Gaolin G  

Science advances 20201023 43


Directly observing intracellular nanostructure formation remains challenging. In this work, using a rationally designed small-molecule 4-nitrobenzyl carbamate-Cys(SEt)-Asp-Asp-Phe(iodine)-2-cyano-benzothiazole (NBC-Iod-CBT), we directly observed intracellular nanoparticle formation with nanocomputed tomography (nano-CT). In vitro, upon glutathione reduction and nitroreductase (NTR) cleavage, NBC-Iod-CBT undergoes a CBT-Cys click condensation reaction to self-assemble nanoparticles Iod-CBT-NPs wi  ...[more]

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