Two GPSes in a Ball: Deciphering the Endosomal Tug-of-War Using Plasmonic Dark-Field STORM
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Live video recording of intracellular material transport is a promising means of deciphering the fascinating underlying mechanisms driving life at the molecular level. Such technology holds the key to realizing real-time observation at appropriate resolutions in three-dimensional (3D) space within living cells. Here, we report an optical microscopic method for probing endosomal dynamics with proper spatiotemporal resolution within 3D space in live cells: plasmonic dark-field STORM (pdf-STORM). We first confirmed that pdf-STORM has a spatial resolution comparable to that of scanning electron microscopy. Additionally, by observing two optical probes within a single organelle, we were able to track rotational movements and demonstrate the feasibility of using pdf-STORM to observe the angular displacements of an endosome during a "tug-of-war" over an extended period. Finally, we show various biophysical parameters of the hitherto unelucidated dynamics of endosomes-angular displacement is discontinuous and -axis movement predominates and follows a long-tail distribution.
Jin S, Ahn Y, Park J, Park M, Lee S, Lee W Adv Sci (Weinh). 2024; 11(29):e2306849.
PMID: 38828676 PMC: 11304332. DOI: 10.1002/advs.202306849.
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