Volume 137, Issue 4, Pages (October 2009)

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Volume 137, Issue 4, Pages 1321-1332 (October 2009) FACS-Assisted Microarray Profiling Implicates Novel Genes and Pathways in Zebrafish Gastrointestinal Tract Development  Carsten Stuckenholz, Lili Lu, Prakash Thakur, Naftali Kaminski, Nathan Bahary  Gastroenterology  Volume 137, Issue 4, Pages 1321-1332 (October 2009) DOI: 10.1053/j.gastro.2009.06.050 Copyright © 2009 AGA Institute Terms and Conditions

Figure 1 Microarray profiles and in situ hybridization of selected genes. Shown in the first column is the microarray expression profile. Dark green lines with squares show expression in GFP+ cells, encompassing the intestine, liver, and pancreas; light green lines with triangles show expression in GFP− cells. Confocal images (A) and in situ hybridization of gutGFP embryos fixed at different time points (B–F). For probe sets and primers, see Supplementary Table 3. Arrowhead indicates liver; arrow, gut; asterisk, pancreas; h, hatching gland. Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions

Figure 2 Phosphatidylinositol signaling is required for normal GI development. In situ hybridization for expression of zebrafish akt2l (A) at 4 (top) and 6 (bottom) dpf. Arrows indicate liver; arrowhead, intestine. Embryos treated with LY294002 show GI defects (B–F). Bright-field images of treated (bottom) and untreated 6 dpf zebrafish (top; B). Liver outlined in green, intestine in red. 4 μm thick sections (4-μmol/L thick) of untreated (C and E) and treated (D and F) 6 dpf embryos. Liver, l; intestine, i; gas bladder, gb; y, yolk; arrowheads, sinusoids. Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions

Figure 3 Nucleolar genes are preferentially expressed in the developing GI tract. Same format as Figure 1. Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions

Figure 4 Metabolic pathways associated with GI function are up-regulated in GFP+ cells. IPA showing enrichment for metabolic pathways in GFP+ cells within differentially expressed genes at different time points (A) and increases in transcriptional activity of genes in GI pathways comparing GFP+ cells between different time points (B). Bars with an asterisk are statistically significant (P < .05). Heatmap of probe sets involved in the electron transport chain (Complex I – Complex IV), the mitochondrial ATP Synthase, and vacuolar ATP Synthase (C). Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions

Figure 5 GSEA enrichment plots for GGAANCGGAANY-containing genes and miR122 and miR217. Each panel shows the running enrichment score (ES) in the top and the signal-to-noise ratio (S2N) used for gene ranking in the bottom. Vertical lines in the middle of the panel indicate the position of gene set members within the sorted microarray data. Normalized ES (NES) and nominal P value are listed below each graph.22,23 Enrichment for genes containing GGAANCGGAANY within 2 kb of the start codon at 2, 3, 4, and 6 dpf (A–D). Enrichment for genes regulated by miR122 (E) and miR217(F) within genes that are active in GFP+ cells at 3 dpf but not at 4 dpf. Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions

Figure 6 GSEA plots show enrichment of human orthologs on 8q among genes active in zebrafish GI development. GSEA enrichment plots for genes with orthologs on human chr8q among genes active in zebrafish GI tissue ranked by expression level (A–D). Graphs are similar to Figure 3, except the ranking statistic is based on expression level not signal-to-noise ratio. Gastroenterology 2009 137, 1321-1332DOI: (10.1053/j.gastro.2009.06.050) Copyright © 2009 AGA Institute Terms and Conditions