PMID- 34424689 OWN - NLM STAT- MEDLINE DCOM- 20220202 LR - 20220202 IS - 1520-5126 (Electronic) IS - 0002-7863 (Linking) VI - 143 IP - 34 DP - 2021 Sep 1 TI - A Universal Labeling Strategy for Nucleic Acids in Expansion Microscopy. PG - 13782-13789 LID - 10.1021/jacs.1c05931 [doi] AB - Expansion microscopy (ExM) enables the nanoscale imaging of ribonucleic acids (RNAs) on a conventional fluorescence microscope, providing information on the intricate patterns of gene expression at (sub)cellular resolution and within spatial context. To extend the use of such strategies, we examined a series of multivalent reagents that allow the labeling and grafting of deoxyribonucleic acid (DNA) oligonucleotide probes in a unified approach. We show that the reagents are directly compatible with third-generation in situ hybridization chain reaction RNA FISH (fluorescence in situ hybridization) techniques while displaying complete retention of the targeted transcripts. Furthermore, we validate and demonstrate that our labeling method is compatible with multicolor staining. Through oligonucleotide-conjugated antibodies, we demonstrate excellent performance in x4 ExM and x10 ExM, achieving a resolution of approximately 50 nm in x10 ExM for both pre- and postexpansion labeling strategies. Our results indicate that our multivalent molecules enable the rapid functionalization of DNA oligonucleotides for ExM. FAU - Wen, Gang AU - Wen G AD - Department of Chemistry, KU Leuven, Leuven 3001, Belgium. FAU - Vanheusden, Marisa AU - Vanheusden M AD - Department of Chemistry, KU Leuven, Leuven 3001, Belgium. FAU - Leen, Volker AU - Leen V AD - Chrometra, Kortenaken, 3470 Belgium. FAU - Rohand, Taoufik AU - Rohand T AD - Faculty Polydisciplinaire of Safi, Department of Chemistry, Laboratory of Analytical & Molecular Chemistry, University Cadi Ayyad, 46000 Safi, Morocco. FAU - Vandereyken, Katy AU - Vandereyken K AD - Department of Human Genetics, KU Leuven, Leuven 3000, Belgium. AD - LISCO, KU Leuven Institute for Single-Cell Omics, Leuven 3000, Belgium. FAU - Voet, Thierry AU - Voet T AD - Department of Human Genetics, KU Leuven, Leuven 3000, Belgium. AD - LISCO, KU Leuven Institute for Single-Cell Omics, Leuven 3000, Belgium. FAU - Hofkens, Johan AU - Hofkens J AUID- ORCID: 0000-0002-9101-0567 AD - Department of Chemistry, KU Leuven, Leuven 3001, Belgium. AD - LISCO, KU Leuven Institute for Single-Cell Omics, Leuven 3000, Belgium. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210823 PL - United States TA - J Am Chem Soc JT - Journal of the American Chemical Society JID - 7503056 RN - 0 (Antibodies) RN - 0 (Fluorescent Dyes) RN - 0 (Nucleic Acids) RN - 0 (Oligonucleotides) RN - EC 2.7.2.3 (PGK1 protein, human) RN - EC 2.7.2.3 (Phosphoglycerate Kinase) SB - IM MH - Antibodies/chemistry MH - Fluorescent Dyes/chemistry MH - Gene Expression MH - HeLa Cells MH - Humans MH - In Situ Hybridization, Fluorescence MH - Microscopy, Fluorescence MH - Nucleic Acids/*chemistry MH - Oligonucleotides/chemistry MH - Phosphoglycerate Kinase/genetics/metabolism MH - Staining and Labeling/*methods EDAT- 2021/08/24 06:00 MHDA- 2022/02/03 06:00 CRDT- 2021/08/23 17:26 PHST- 2021/08/24 06:00 [pubmed] PHST- 2022/02/03 06:00 [medline] PHST- 2021/08/23 17:26 [entrez] AID - 10.1021/jacs.1c05931 [doi] PST - ppublish SO - J Am Chem Soc. 2021 Sep 1;143(34):13782-13789. doi: 10.1021/jacs.1c05931. Epub 2021 Aug 23.