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Temperature is a critical parameter that influences various biological events and reactions in homeotherms (including mammals), poikilotherms, and plants. However, the spatiotemporal patterns of temperature at the single-cell level remain largely unknown. Various kinds of thermometers have been developed for monitoring temperature at the single-cell level. We introduce some cellular thermometers based...
Photoluminescent quantum dots (QDs) promise many biomedical applications as a new class of optical probes showing unique optical properties such as high brightness, stability, and multiplexing ability. In this review, we focus on recent research interest of medically-translatable QDs for in vitro biomedical sensing and in vivo imaging. QD-based biomedical sensing shows higher selectivity and sensitivity...
Chemistry-based bioimaging techniques have contributed to the elucidation of intracellular physiological events. During the last few decades, many fluorescent sensors have been developed and used in live cell experiments. Owing to immense efforts by numerous research groups, several strategies have been developed to design fluorescent sensors based on various components such as small molecules and...
Oxygen imaging of biological cells and tissues is becoming increasingly important in cell biology and in the pathophysiology of various hypoxia-related diseases. The optical oxygen-sensing method using luminescent probes provides very useful, high spatial resolution information regarding oxygen distribution in living cells and tissues. This review focuses on recent advances in biological oxygen measurements...
Sequence-specific DNA-binding proteins can maintain and regulate cellular functions by accurately and quickly binding to target sequences among large amounts of nontarget DNA. The facilitated diffusion mechanism of DNA-binding proteins—a combination of three-dimensional (3D) diffusion and one-dimensional (1D) sliding along DNA—has been proposed to explain the target binding accuracy and rapidity and...
It has become clear that biological processes are highly dynamic and heterogeneous within and among cells. Conventional analytical tools and chemical or genetic manipulations are unsuitable for dissecting the role of their spatiotemporally dynamic nature. Recently, optical control of biomolecular signaling, a technology called “optogenetics,” has gained much attention. The technique has enabled spatial...
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