PMID- 37993896 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231125 IS - 1746-4811 (Print) IS - 1746-4811 (Electronic) IS - 1746-4811 (Linking) VI - 19 IP - 1 DP - 2023 Nov 22 TI - A rapid and sensitive, multiplex, whole mount RNA fluorescence in situ hybridization and immunohistochemistry protocol. PG - 131 LID - 10.1186/s13007-023-01108-9 [doi] LID - 131 AB - BACKGROUND: In the past few years, there has been an explosion in single-cell transcriptomics datasets, yet in vivo confirmation of these datasets is hampered in plants due to lack of robust validation methods. Likewise, modeling of plant development is hampered by paucity of spatial gene expression data. RNA fluorescence in situ hybridization (FISH) enables investigation of gene expression in the context of tissue type. Despite development of FISH methods for plants, easy and reliable whole mount FISH protocols have not yet been reported. RESULTS: We adapt a 3-day whole mount RNA-FISH method for plant species based on a combination of prior protocols that employs hybridization chain reaction (HCR), which amplifies the probe signal in an antibody-free manner. Our whole mount HCR RNA-FISH method shows expected spatial signals with low background for gene transcripts with known spatial expression patterns in Arabidopsis inflorescences and monocot roots. It allows simultaneous detection of three transcripts in 3D. We also show that HCR RNA-FISH can be combined with endogenous fluorescent protein detection and with our improved immunohistochemistry (IHC) protocol. CONCLUSIONS: The whole mount HCR RNA-FISH and IHC methods allow easy investigation of 3D spatial gene expression patterns in entire plant tissues. CI - (c) 2023. The Author(s). FAU - Huang, Tian AU - Huang T AD - Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA. FAU - Guillotin, Bruno AU - Guillotin B AD - Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY, 10003, USA. FAU - Rahni, Ramin AU - Rahni R AD - Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY, 10003, USA. FAU - Birnbaum, Kenneth D AU - Birnbaum KD AD - Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY, 10003, USA. FAU - Wagner, Doris AU - Wagner D AD - Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA. wagnerdo@sas.upenn.edu. LA - eng GR - LT000972/2018-L/Human Frontiers of Science/ GR - 2319036/Division of Integrative Organismal Systems/ PT - Journal Article DEP - 20231122 PL - England TA - Plant Methods JT - Plant methods JID - 101245798 PMC - PMC10666358 OTO - NOTNLM OT - Fluorescent protein OT - Hybridization chain reaction OT - Immunohistochemistry OT - RNA-FISH OT - Whole mount COIS- The authors declare that they have no competing interests. EDAT- 2023/11/23 06:42 MHDA- 2023/11/23 06:43 PMCR- 2023/11/22 CRDT- 2023/11/23 00:05 PHST- 2023/05/29 00:00 [received] PHST- 2023/11/10 00:00 [accepted] PHST- 2023/11/23 06:43 [medline] PHST- 2023/11/23 06:42 [pubmed] PHST- 2023/11/23 00:05 [entrez] PHST- 2023/11/22 00:00 [pmc-release] AID - 10.1186/s13007-023-01108-9 [pii] AID - 1108 [pii] AID - 10.1186/s13007-023-01108-9 [doi] PST - epublish SO - Plant Methods. 2023 Nov 22;19(1):131. doi: 10.1186/s13007-023-01108-9.