Expandable ELAST for super-resolution imaging of thick tissue slices using a hydrogel containing charged monomers

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Hydrogels have been utilized extensively as a material for retaining position information in tissue imaging procedures, such as tissue clearing and super-resolution imaging. Immunostaining thick biological tissues, however, poses a bottleneck that restricts sample size. The recently developed technique known as entangled link-augmented stretchable tissue-hydrogel (ELAST) accelerates the immunostaining process by embedding specimens in long-chain polymers and stretching them. A more advanced version of ELAST, magnifiable entangled link-augmented stretchable tissue-hydrogel (mELAST), achieves rapid immunostaining and tissue expansion by embedding specimens in long-chain neutral polymers and subsequently hydrolyzing them. Building on these techniques, we introduce a variant of mELAST called ExELAST. This approach uses charged monomers to stretch and expand tissue slices. Using ExELAST, we first tested two hydrogel compositions that could permit uniform expansion of biological specimens. Then, we apply the tailored hydrogel to the 500-& mu;m-thick mouse brain slices and demonstrated that they can be stained within two days and imaged with a resolution below the diffraction limit of light.
Publisher
NATURE PORTFOLIO
Issue Date
2023-07
Language
English
Article Type
Article
Citation

SCIENTIFIC REPORTS, v.13, no.1

ISSN
2045-2322
DOI
10.1038/s41598-023-38891-3
URI
http://hdl.handle.net/10203/311697
Appears in Collection
MS-Journal Papers(저널논문)
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