Visualizing Intracellular Organelle and Cytoskeletal Interactions at Nanoscale Resolution on Millisecond Timescales.

Published

Journal Article

In eukaryotic cells, organelles and the cytoskeleton undergo highly dynamic yet organized interactions capable of orchestrating complex cellular functions. Visualizing these interactions requires noninvasive, long-duration imaging of the intracellular environment at high spatiotemporal resolution and low background. To achieve these normally opposing goals, we developed grazing incidence structured illumination microscopy (GI-SIM) that is capable of imaging dynamic events near the basal cell cortex at 97-nm resolution and 266 frames/s over thousands of time points. We employed multi-color GI-SIM to characterize the fast dynamic interactions of diverse organelles and the cytoskeleton, shedding new light on the complex behaviors of these structures. Precise measurements of microtubule growth or shrinkage events helped distinguish among models of microtubule dynamic instability. Analysis of endoplasmic reticulum (ER) interactions with other organelles or microtubules uncovered new ER remodeling mechanisms, such as hitchhiking of the ER on motile organelles. Finally, ER-mitochondria contact sites were found to promote both mitochondrial fission and fusion.

Full Text

Duke Authors

Cited Authors

  • Guo, Y; Li, D; Zhang, S; Yang, Y; Liu, J-J; Wang, X; Liu, C; Milkie, DE; Moore, RP; Tulu, US; Kiehart, DP; Hu, J; Lippincott-Schwartz, J; Betzig, E; Li, D

Published Date

  • November 2018

Published In

Volume / Issue

  • 175 / 5

Start / End Page

  • 1430 - 1442.e17

PubMed ID

  • 30454650

Pubmed Central ID

  • 30454650

Electronic International Standard Serial Number (EISSN)

  • 1097-4172

International Standard Serial Number (ISSN)

  • 0092-8674

Digital Object Identifier (DOI)

  • 10.1016/j.cell.2018.09.057

Language

  • eng