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The genomic program for development operates primarily by the regulated expression of genes encoding transcription factors and components of cell signaling pathways. This program is executed by cis-regulatory DNAs (e.g., enhancers and silencers) that control gene expression. The regulatory inputs and functional outputs of developmental control genes constitute network-like architectures. In this PNAS Special Feature are assembled papers on developmental gene regulatory networks governing the formation of various tissues and organs in nematodes, flies, sea urchins, frogs, and mammals. Here, we survey salient points of these networks, by using as reference those governing specification of the endomesoderm in sea urchin embryos and dorsal-ventral patterning in the Drosophila embryo.
Alberga,
The snail gene required for mesoderm formation in Drosophila is expressed dynamically in derivatives of all three germ layers.
1991, Pubmed
Alberga,
The snail gene required for mesoderm formation in Drosophila is expressed dynamically in derivatives of all three germ layers.
1991,
Pubmed Amiri,
Dorsoventral patterning: a direct route from ovary to embryo.
2002,
Pubmed Belvin,
A conserved signaling pathway: the Drosophila toll-dorsal pathway.
1996,
Pubmed Bolouri,
Modeling transcriptional regulatory networks.
2002,
Pubmed Calestani,
Isolation of pigment cell specific genes in the sea urchin embryo by differential macroarray screening.
2003,
Pubmed
,
Echinobase Chang,
The CNS midline cells control the spitz class and Egfr signaling genes to establish the proper cell fate of the Drosophila ventral neuroectoderm.
2001,
Pubmed Cornell,
Vnd/nkx, ind/gsh, and msh/msx: conserved regulators of dorsoventral neural patterning?
2000,
Pubmed Cowden,
The Snail repressor positions Notch signaling in the Drosophila embryo.
2002,
Pubmed Davidson,
Regulatory gene networks and the properties of the developmental process.
2003,
Pubmed Davidson,
A genomic regulatory network for development.
2002,
Pubmed
,
Echinobase Davidson,
A provisional regulatory gene network for specification of endomesoderm in the sea urchin embryo.
2002,
Pubmed
,
Echinobase Davidson,
Specification of cell fate in the sea urchin embryo: summary and some proposed mechanisms.
1998,
Pubmed
,
Echinobase Emily-Fenouil,
GSK3beta/shaggy mediates patterning along the animal-vegetal axis of the sea urchin embryo.
1998,
Pubmed
,
Echinobase Frank,
A group of genes required for maintenance of the amnioserosa tissue in Drosophila.
1996,
Pubmed Gabay,
EGF receptor signaling induces pointed P1 transcription and inactivates Yan protein in the Drosophila embryonic ventral ectoderm.
1996,
Pubmed Golembo,
The Drosophila embryonic midline is the site of Spitz processing, and induces activation of the EGF receptor in the ventral ectoderm.
1996,
Pubmed Golembo,
Vein expression is induced by the EGF receptor pathway to provide a positive feedback loop in patterning the Drosophila embryonic ventral ectoderm.
1999,
Pubmed Gray,
Short-range repression permits multiple enhancers to function autonomously within a complex promoter.
1994,
Pubmed Halfon,
Computation-based discovery of related transcriptional regulatory modules and motifs using an experimentally validated combinatorial model.
2002,
Pubmed Hinman,
Developmental gene regulatory network architecture across 500 million years of echinoderm evolution.
2003,
Pubmed
,
Echinobase Inoue,
Transcriptional network underlying Caenorhabditis elegans vulval development.
2005,
Pubmed Istrail,
Logic functions of the genomic cis-regulatory code.
2005,
Pubmed
,
Echinobase Jiang,
Binding affinities and cooperative interactions with bHLH activators delimit threshold responses to the dorsal gradient morphogen.
1993,
Pubmed Kasai,
Specification of the Drosophila CNS midline cell lineage: direct control of single-minded transcription by dorsal/ventral patterning genes.
1998,
Pubmed Koide,
Xenopus as a model system to study transcriptional regulatory networks.
2005,
Pubmed
,
Echinobase Kosman,
Establishment of the mesoderm-neuroectoderm boundary in the Drosophila embryo.
1991,
Pubmed Lee,
The CNS midline cells and spitz class genes are required for proper patterning of Drosophila ventral neuroectoderm.
1999,
Pubmed Lee,
Regulated intracellular ligand transport and proteolysis control EGF signal activation in Drosophila.
2001,
Pubmed Leptin,
twist and snail as positive and negative regulators during Drosophila mesoderm development.
1991,
Pubmed Logan,
Nuclear beta-catenin is required to specify vegetal cell fates in the sea urchin embryo.
1999,
Pubmed
,
Echinobase Markstein,
A regulatory code for neurogenic gene expression in the Drosophila embryo.
2004,
Pubmed Minokawa,
cis-Regulatory inputs of the wnt8 gene in the sea urchin endomesoderm network.
2005,
Pubmed
,
Echinobase Morel,
Repression by suppressor of hairless and activation by Notch are required to define a single row of single-minded expressing cells in the Drosophila embryo.
2000,
Pubmed Nambu,
The Drosophila single-minded gene encodes a helix-loop-helix protein that acts as a master regulator of CNS midline development.
1991,
Pubmed Nilson,
EGF receptor signaling in Drosophila oogenesis.
1999,
Pubmed Ochoa-Espinosa,
The role of binding site cluster strength in Bicoid-dependent patterning in Drosophila.
2005,
Pubmed Oliveri,
Gene regulatory network controlling embryonic specification in the sea urchin.
2004,
Pubmed
,
Echinobase Oliveri,
A regulatory gene network that directs micromere specification in the sea urchin embryo.
2002,
Pubmed
,
Echinobase Oliveri,
Activation of pmar1 controls specification of micromeres in the sea urchin embryo.
2003,
Pubmed
,
Echinobase Papatsenko,
Quantitative analysis of binding motifs mediating diverse spatial readouts of the Dorsal gradient in the Drosophila embryo.
2005,
Pubmed Peri,
Mechanisms of Gurken-dependent pipe regulation and the robustness of dorsoventral patterning in Drosophila.
2002,
Pubmed Podos,
Morphogen gradients: new insights from DPP.
1999,
Pubmed Pyrowolakis,
A simple molecular complex mediates widespread BMP-induced repression during Drosophila development.
2004,
Pubmed Raftery,
Gradients and thresholds: BMP response gradients unveiled in Drosophila embryos.
2003,
Pubmed Reim,
The T-box-encoding Dorsocross genes function in amnioserosa development and the patterning of the dorsolateral germ band downstream of Dpp.
2003,
Pubmed Revilla-i-Domingo,
R11: a cis-regulatory node of the sea urchin embryo gene network that controls early expression of SpDelta in micromeres.
2004,
Pubmed
,
Echinobase Roth,
Axis determination. Proteolytic generation of a morphogen.
1994,
Pubmed Rushlow,
Transcriptional regulation of the Drosophila gene zen by competing Smad and Brinker inputs.
2001,
Pubmed Sherwood,
LvNotch signaling mediates secondary mesenchyme specification in the sea urchin embryo.
1999,
Pubmed
,
Echinobase Sherwood,
Identification and localization of a sea urchin Notch homologue: insights into vegetal plate regionalization and Notch receptor regulation.
1997,
Pubmed
,
Echinobase Singh,
Contingent gene regulatory networks and B cell fate specification.
2005,
Pubmed Small,
Regulation of even-skipped stripe 2 in the Drosophila embryo.
1992,
Pubmed Stathopoulos,
Whole-genome analysis of dorsal-ventral patterning in the Drosophila embryo.
2002,
Pubmed Stathopoulos,
Dorsal gradient networks in the Drosophila embryo.
2002,
Pubmed Stathopoulos,
pyramus and thisbe: FGF genes that pattern the mesoderm of Drosophila embryos.
2004,
Pubmed Sweet,
The role of micromere signaling in Notch activation and mesoderm specification during sea urchin embryogenesis.
1999,
Pubmed
,
Echinobase von Ohlen,
Convergence of dorsal, dpp, and egfr signaling pathways subdivides the drosophila neuroectoderm into three dorsal-ventral columns.
2000,
Pubmed Weiss,
Dorsoventral patterning in the Drosophila central nervous system: the intermediate neuroblasts defective homeobox gene specifies intermediate column identity.
1998,
Pubmed Weitzel,
Differential stability of beta-catenin along the animal-vegetal axis of the sea urchin embryo mediated by dishevelled.
2004,
Pubmed
,
Echinobase Wharton,
Smad affinity can direct distinct readouts of the embryonic extracellular Dpp gradient in Drosophila.
2004,
Pubmed Wikramanayake,
beta-Catenin is essential for patterning the maternally specified animal-vegetal axis in the sea urchin embryo.
1998,
Pubmed
,
Echinobase Yuh,
An otx cis-regulatory module: a key node in the sea urchin endomesoderm gene regulatory network.
2004,
Pubmed
,
Echinobase Zaffran,
Early signals in cardiac development.
2002,
Pubmed Zhang,
Brinker is a sequence-specific transcriptional repressor in the Drosophila embryo.
2001,
Pubmed Zinn,
Slit branches out: a secreted protein mediates both attractive and repulsive axon guidance.
1999,
Pubmed