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| 1 | 免疫层析试纸条标记探针研究进展显示文摘免疫层析试纸条(immunochromatographic test strips,ICTSs)有效结合了层析法卓越的分离能力和常规免疫分析技术的高度特异性,加之其便携性,该技术无疑为灵敏、定量的现场检测提供了一个理想的平台。近年来随着检测方法和技术的不断革新,包括生色、发光及电化学信号产生型等在内的多种探针不断涌现,它们或直接共价结合靶标蛋白或装载于纳米颗粒中用于免疫层析试纸条的标记。本文旨在总结归纳当前ICTSs标记探针的最新进展,详尽解析各类探针性质、发展、优劣势及其在生物分析中的应用,以期为研究者在设计试纸条时适宜探针的选择提供有力的技术支持。 | 谢雪钦 | 2014 | 食品安全质量检测学报2014，5，7： | 6 |
| 2 | Cd Se/Zn S quantum dots induce photodynamic effects and cytotoxicity in pancreatic cancer cells显示文摘AIM: To investigate the photodynamic effect of Cd Se/Zn S quantum dots(QDs) on pancreatic cancer cells and elucidate the probable mechanisms.METHODS: The pancreatic cancer cell line SW1990 was treated with different concentrations of Cd Se/Zn S QDs(0, 0.5, 1.0, 1.5, 2.0, 2.5 μmol/L), with or without illumination. The viability of SW1990 cells was tested using the Cell Counting Kit-8(CCK-8) assay. The ultrastructural changes of SW1990 cells were observed by transmission electron microscopy. Apoptosis was detected by nuclear staining and flow cytometry(FCM). Reactive oxygen species(ROS) were measured by dichlorofluorescein diacetate via fluorescence microscopy. Expression of Bax, Bcl-2 and caspase-3 was measured by real-time polymerase chain reaction(PCR) and protein immunoblotting 24 h after SW1990 cells were treated with Cd Se/Zn S QDs and illuminated.RESULTS: The CCK-8 assay results showed that both Cd Se/Zn S QDs with and without illumination suppressed SW1990 cell proliferation. Cell viability was significantly lower when illuminated or with a longer incubation time and a higher light dose. Cd Se/Zn S QDs with illumination caused ultrastructural changes in SW1990 cells, such as organelle degeneration and chromatin condensation and aggregation at the periphery of the nucleus. Fluorescence microscopy and FCM showed that Cd Se/Zn S QDs(1.5 μmol/L) with illumination increased SW1990 cell apoptosis(53.2%) and ROS generation compared with no illumination. Real-time PCR showed that expression of Bax and caspase-3 was upregulated and Bcl-2 was downregulated. Immunoblotting results were consistent with real-time PCR results. Inhibition of ROS and apoptosis both attenuated QD-photodynamictherapy-induced cell death.CONCLUSION: Cd Se/Zn S QDs can be used as a photosensitizer to inhibit SW1990 cell proliferation through ROS generation and apoptotic protein expression regulation. | Si-Jia He Jia Cao Yong-Sheng Li Jia-Chun Yang Min Zhou Chun-Ying Qu Yi Zhang Feng Shen Ying Chen Ming-Ming Li Lei-Ming Xu | 2016 | World Journal of Gastroenterology2016，22，21： | 3 |
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