Voyage inside the cell: Microsystems and nanoengineering for intracellular measurement and manipulation

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<jats:title>Abstract</jats:title><jats:p>Properties of organelles and intracellular structures play important roles in regulating cellular functions, such as gene expression, cell motility and metabolism. The ability to directly interrogate intracellular structures inside a single cell for measurement and manipulation has significant implications in the understanding of subcellular and suborganelle activities, diagnosing diseases, and potentially developing new therapeutic approaches. In the past few decades, a number of technologies have been developed to study single-cell properties. However, methods of measuring intracellular properties and manipulating subcellular structures have been largely underexplored. Due to the even smaller size of intracellular targets and lower signal-to-noise ratio than that in whole-cell studies, the development of tools for intracellular measurement and manipulation is challenging. This paper reviews emerging microsystems and nanoengineered technologies for sensing and quantitative measurement of intracellular properties and for manipulating structures inside a single cell. Recent progress and limitations of these new technologies as well as new discoveries and prospects are discussed.</jats:p>

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