Super-Resolution Imaging of the Extracellular Space in Living Brain Tissue.

Abstract:

:The extracellular space (ECS) of the brain has an extremely complex spatial organization, which has defied conventional light microscopy. Consequently, despite a marked interest in the physiological roles of brain ECS, its structure and dynamics remain largely inaccessible for experimenters. We combined 3D-STED microscopy and fluorescent labeling of the extracellular fluid to develop super-resolution shadow imaging (SUSHI) of brain ECS in living organotypic brain slices. SUSHI enables quantitative analysis of ECS structure and reveals dynamics on multiple scales in response to a variety of physiological stimuli. Because SUSHI produces sharp negative images of all cellular structures, it also enables unbiased imaging of unlabeled brain cells with respect to their anatomical context. Moreover, the extracellular labeling strategy greatly alleviates problems of photobleaching and phototoxicity associated with traditional imaging approaches. As a straightforward variant of STED microscopy, SUSHI provides unprecedented access to the structure and dynamics of live brain ECS and neuropil.

journal_name

Cell

journal_title

Cell

authors

Tønnesen J,Inavalli VVGK,Nägerl UV

doi

10.1016/j.cell.2018.02.007

subject

Has Abstract

pub_date

2018-02-22 00:00:00

pages

1108-1121.e15

issue

5

eissn

0092-8674

issn

1097-4172

pii

S0092-8674(18)30151-X

journal_volume

172

pub_type

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