Abstract
Label-retention expansion microscopy (LR-ExM) is a sample preparation technique, which embeds the cells or tissues in a swellable hydrogel and expands the sample so that one can achieve a high resolution with any conventional fluorescence microscopes. Fluorescence loss during polymerization and protein denaturation have been a major limitation of standard expansion microscopy. To minimize fluorescence loss, LR-ExM uses trifunctional anchors, which can survive from polymerization and denaturation, and then introduce fluorophores after expansion. By using LR-ExM, one can study the structure of primary cilia at molecular-scale resolution with a much higher signal-to-noise ratio, compared with previously introduced expansion microscopy methods. In this chapter, we describe a detailed procedure showing how LR-ExM is used to study ciliary proteins.
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Acknowledgments
This work was supported by the U.S. National Institutes of Health (R00 GM126136 to X.S.), and partially supported by the U.S. National Science Foundation (DMS1763272 to S.P.), and a grant from the Simons Foundation (594598 to S.P.).
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Park, S., Shi, X. (2024). Expansion Microscopy of Ciliary Proteins. In: Mennella, V. (eds) Cilia. Methods in Molecular Biology, vol 2725. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3507-0_4
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DOI: https://doi.org/10.1007/978-1-0716-3507-0_4
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