title: High-resolution, three-dimensional mapping of gene expression using GeneExpressMap (GEM).
abstract: The analysis of temporal and spatial patterns of gene expression is critically important for many kinds of developmental studies, including the construction of gene regulatory networks. Recently, multiplex, fluorescent, whole mount in situ hybridization (multiplex F-WMISH), applied in combination with confocal microscopy, has emerged as the method of choice for high-resolution, three-dimensional (3D) mapping of gene expression patterns in developing tissues. We have developed an image analysis tool, GeneExpressMap (GEM), that facilitates the rapid, 3D analysis of multiplex F-WMISH data at single-cell resolution. GEM assigns F-WMISH signal to individual cells based upon the proximity of cytoplasmic hybridization signal to cell nuclei. Here, we describe the features of GEM and, as a test of its utility, we use GEM to analyze patterns of regulatory gene expression in the non-skeletogenic mesoderm of the early sea urchin embryo. GEM greatly extends the power of multiplex F-WMISH for analyzing patterns of gene expression and is a valuable tool for gene network analysis and many other kinds of developmental studies.
authors: Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
authors: C J
authors: CJ
authors: Flynn
authors: T
authors: T
authors: Sharma
authors: S W
authors: SW
authors: Ruffins
authors: S L
authors: SL
authors: Guerra
authors: J C
authors: JC
authors: Crowley
authors: C A
authors: CA
authors: Ettensohn
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D002467:Cell Nucleus / Q000235:genetics; D030541:Databases, Genetic; D004625:Embryo, Nonmammalian / Q000166:cytology / Q000378:metabolism; D020869:Gene Expression Profiling / Q000379:methods*; D018507:Gene Expression Regulation, Developmental; D021621:Imaging, Three-Dimensional / Q000379:methods*; D017403:In Situ Hybridization; D015203:Reproducibility of Results; D012617:Sea Urchins / Q000166:cytology / Q000235:genetics*
chemical_list: D015415:Biomarkers