Journal of the American Chemical Society · 2019
Quantum Dot Nanobeacons for Single RNA Labeling and Imaging.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Ma Yingxin, Mao Guobin, Huang Weiren, Wu Guoqiang, Yin Wen, Ji Xinghu, Deng Zishi, Cai Zhiming, Zhang Xian-En, He Zhike, Cui Zongqiang
Аннотация
Detection and imaging RNAs in live cells is in high demand. Methodology for such a purpose is still a challenge, particularly for single RNA detection and imaging in live cells. In this study, a type of quantum dot (QD) nanobeacon with controllable valencies was constructed by precisely conjugating the black hole quencher (BHQ1) and phosphorothioate comodified DNA onto CdTe:Zn2+ QDs via a one-pot hydrothermal method. The nanobeacon with only one conjugated DNA was used to label and detect low-abundance nucleic acids in live cells, and single HIV-1 RNAs were detected and imaged in live HIV-1 integrated cells. Additionally, QD nanobeacon-labeled HIV-1 genomic RNAs were encapsulated in progeny viral particles, which can be used to track the uncoating process of single viruses. The current study provides a platform for nucleic acid labeling and imaging with high sensitivity, being especially meaningful for tracking of individual RNAs in live cells.