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| 1 | Research progress in quantifying the mechanical properties of single living cells using atomic force microscopy显示文摘The advent of atomic force microscopy(AFM)provides a powerful tool for investigating the behaviors of single living cells under near physiological conditions.Besides acquiring the images of cellular ultra-microstructures with nanometer resolution,the most remarkable advances are achieved on the use of AFM indenting technique to quantify the mechanical properties of single living cells.By indenting single living cells with AFM tip,we can obtain the mechanical properties of cells and monitor their dynamic changes during the biological processes(e.g.,after the stimulation of drugs).AFM indentation-based mechanical analysis of single cells provides a novel approach to characterize the behaviors of cells from the perspective of biomechanics,considerably complementing the traditional biological experimental methods.Now,AFM indentation technique has been widely used in the life sciences,yielding a large amount of novel information that is meaningful to our understanding of the underlying mechanisms that govern the cellular biological functions.Here,based on the authors’own researches on AFM measurement of cellular mechanical properties,the principle and method of AFM indentation technique was presented,the recent progress of measuring the cellular mechanical properties using AFM was summarized,and the challenges of AFM single-cell nanomechanical analysis were discussed. | Mi Li Lianqing Liu Ning Xi Yuechao Wang | 2014 | Chinese Science Bulletin2014,59,31: | 8 |
| 2 | 受激辐射损耗超分辨成像技术研究显示文摘受激辐射损耗显微成像(STED)是一种超分辨荧光显微成像技术,它能够突破传统光学衍射极限的限制,把远场光学分辨率提高到百纳米以内,被广泛应用于生物医学等领域,是目前光学显微成像领域研究的热点之一。采用了一种基于超连续谱皮秒脉冲白激光光源的STED显微系统,实现超分辨成像。并从精密合束、脉冲延迟和损耗光残留光强几个方面探讨系统优化,从而获得最佳的成像效果。对直径约25 nm荧光微球成像实验的数据表明:该系统成像分辨率可达约60 nm,分辨能力远远高于衍射极限。另外,系统成功实现了对核孔复合物、微管和微丝等一系列生物样品的超分辨成像,共聚焦成像中某些模糊不清的结构在STED成像中清晰可辨。 | 魏通达 张运海 杨皓旻 | 2016 | 红外与激光工程2016,45,6: | 6 |
| 3 | Quantitative single-molecule study of TGF-β/ Smad signaling显示文摘TGF-/Smad 发信号小径在不同房间类型和环境条件之中触发多样的细胞的回答。相互作用在 TGF-/Smad 包含了发信号的蛋白质蛋白质的定量分析为理解这条发信号的小径的分子的机制被要求。有高空间与时间的分辨率的实时房间的单个分子的缩微本是一个新工具以一种即时方式监视关键分子的事件。在这评论,我们主要在由单个分子的方法表明蛋白质的 TGF-/Smad 的量的描述上介绍了最近的工作,并且显示出它怎么使我们能关于这个正规发信号过程获得新卓见。 | Rong Zhao Nan Li Jiachao Xu Wenhui Li Xiaohong Fang | 2018 | Acta Biochimica et Biophysica Sinica2018,50,1: | 5 |
| 4 | 超分辨成像方法研究现状与进展显示文摘光电成像系统受到衍射极限和像元分辨率的制约,但研究者们从未停止过脚步来突破这一限制。本文介绍了近年来开展的各种超分辨成像方法和技术,包括应用于荧光显微成像的受激发射损耗技术、结构光照明技术、光激活定位技术与随机光学重构超分辨成像技术;可应用于显微系统、光存储与眼底成像的光瞳滤波技术与径向偏振光超分辨聚焦技术;应用于空间探测的合成孔径技术、光子筛成像技术、超振荡透镜技术、亚像元技术与焦平面编码技术。主要讨论了以上超分辨方法的原理、实现手段与目前发展水平。 | 王超 张雅琳 姜会林 李英超 江伦 付强 韩龙 | 2017 | 激光与红外2017,47,7: | 5 |
| 5 | 超分辨率荧光显微技术——解析2014年诺贝尔化学奖显示文摘2014年诺贝尔化学奖授予Eric Betzig,Stefan W.Hell和William E.Moerner3位科学家,以表彰他们在超分辨率荧光显微成像技术方面的重大贡献。本文从显微镜分辨率的起因入手,对超分辨荧光显微技术进行了深入阐述。此外,对光学显微技术的发展前景进行展望。 | 席鹏 孙育杰 | 2015 | 科技导报2015,33,4: | 4 |
| 6 | Sub-diffraction-limit cell imaging using a super-resolution microscope with simplified pulse synchronization显示文摘Stimulated emission depletion(STED) microscope is one of the most prominent super-resolution bio-imaging instruments, which holds great promise for ultrahigh-resolution imaging of cells. To construct a STED microscope, it is challenging to realize temporal synchronization between the excitation pulses and the depletion pulses. In this study, we present a simple and low-cost method to achieve pulse synchronization by using a condensed fluorescent dye as a depletion indicator. By using this method, almost all the confocal microscopes can be upgraded to a STED system without losing its original functions. After the pulse synchronization,our STED system achieved sub-100-nm resolution for fluorescent nanospheres and single-cell imaging. | Zhaoshuai Gao Suhui Deng Jiang Li Kun Wang Jiajun Li Lihua Wang Chunhai Fan | 2017 | Science China Chemistry2017,60,10: | 2 |
| 7 | 超分辨荧光显微镜-显纳镜显示文摘2014年诺贝尔化学奖授予美国科学家Eric Betzig、德国科学家Stefan W.Hell和美国科学家William E.Moerner,表彰他们在'发展超分辨荧光显微镜'方面的贡献。超分辨荧光显微镜的出现,为深入研究生命过程的分子机制提供了新的工具和新的机遇。本文综述了三位获奖人发明的两种超分辨荧光显微镜的基本原理、方法发展和生物医学应用,并对国内相关研究进展作了简介。 | 袁景和 方晓红 | 2014 | 化学通报2014,77,11: | 1 |
| 8 | 超高时空分辨蛋白质机器动态成像显示文摘蛋白质是生命活动的主要执行者,一切生命活动都有赖于蛋白质功能的正确发挥。蛋白质机器,是指由大量蛋白质和生物分子形成的高维度的、复杂的超级功能复合体,此外也包括蛋白质与蛋白质或其他分子形成的低维度复合物及具有特定生物学功能的蛋白质分子。膜转运和跨膜信号转导是细胞的重要生命活动过程,与细胞命运和功能密切相关。细胞中蛋白质机器是高度动态的,由于组成复杂、功能多样,在分子水平研究蛋白质机器行为机制对成像技术提出了极大的挑战,针对重大生命过程中蛋白质机器动态组装与功能调控的分子机制这一核心科学问题,提出了解决这些难题的工作思路和重点研究内容。从提高成像时空分辨率、实现时空可控和多模态融合入手,发展多种新型成像和关联技术,揭示膜转运和跨膜信号转导等重要生命过程中蛋白质机器的作用机制。提出的主要研究内容包括下一代超高时空分辨结构光照明显微镜、超分辨荧光成像技术和原子力显微镜联用、时间相关的超分辨显微镜与冷冻电镜关联技术。 | 王宏达 李栋 纪伟 张名姝 周正洪 白丽 储开芹 张隆华 孙育杰 | 2018 | 中国基础科学2018,20,1: | 1 |
| 9 | Single-molecule imaging and tracking of molecular dynamics in living cells显示文摘Unlike the ensemble-averaging measurements, the single-molecule imaging and tracking(SMIT) in living cells provides the real-time quantitative information about the locations, kinetics, dynamics and interactions of individual molecules in their native environments with high spatiotemporal resolution and minimal perturbation. The past decade has witnessed a transforming development in the methods of SMIT with living cells, including fluorescent probes, labeling strategies, fluorescence microscopy, and detection and tracking algorithms. In this review, we will discuss these aspects with a particular focus on their recent advancements. We will then describe representative single-molecule studies to illustrate how the single-molecule approaches can be applied to monitor biomolecular interaction/reaction dynamics, and extract the molecular mechanistic information for different cellular systems. | Nan Li Rong Zhao Yahong Sun Zi Ye Kangmin He Xiaohong Fang | 2017 | National Science Review2017,4,5: | 0 |