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  • 1
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    Bicoid-independent formation of thoracic segments in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: The maternal determinant Bicoid (Bcd) represents the paradigm of a morphogen that provides positional information for pattern formation. However, as bicoid seems to be a recently acquired gene in flies, the question was raised as to how embryonic patterning is achieved in organisms with more ancestral modes of development. Because the phylogenetically conserved Hunchback (Hb) protein had previously been shown to act as a morphogen in abdominal patterning, we asked which functions of Bcd could be performed by Hb. By reestablishing a proposed ancient regulatory circuitry in which maternal Hb controls zygotic hunchback expression, we show that Hb is able to form thoracic segments in the absence of Bcd.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wimmer, E A -- Carleton, A -- Harjes, P -- Turner, T -- Desplan, C -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2476-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lehrstuhl Genetik, Universitat Bayreuth, 95447 Bayreuth, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741965" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Patterning ; DNA-Binding Proteins/genetics/*physiology ; Drosophila/*embryology/genetics ; *Drosophila Proteins ; Embryonic Development ; Female ; Gene Expression Regulation, Developmental ; Genes, Insect ; Homeodomain Proteins/genetics/*physiology ; Insect Proteins/genetics/*physiology ; Male ; Mutation ; Phenotype ; Promoter Regions, Genetic ; Thorax/embryology ; Trans-Activators/genetics/*physiology ; Transcription Factors/genetics/*physiology ; Transgenes ; Zinc Fingers ; Zygote/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Switch of rhodopsin expression in terminally differentiated Drosophila sensory neurons (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-07-03
    Description: Specificity of sensory neurons requires restricted expression of one sensory receptor gene and the exclusion of all others within a given cell. In the Drosophila retina, functional identity of photoreceptors depends on light-sensitive Rhodopsins (Rhs). The much simpler larval eye (Bolwig organ) is composed of about 12 photoreceptors, eight of which are green-sensitive (Rh6) and four blue-sensitive (Rh5). The larval eye becomes the adult extraretinal 'eyelet' composed of four green-sensitive (Rh6) photoreceptors. Here we show that, during metamorphosis, all Rh6 photoreceptors die, whereas the Rh5 photoreceptors switch fate by turning off Rh5 and then turning on Rh6 expression. This switch occurs without apparent changes in the programme of transcription factors that specify larval photoreceptor subtypes. We also show that the transcription factor Senseless (Sens) mediates the very different cellular behaviours of Rh5 and Rh6 photoreceptors. Sens is restricted to Rh5 photoreceptors and must be excluded from Rh6 photoreceptors to allow them to die at metamorphosis. Finally, we show that Ecdysone receptor (EcR) functions autonomously both for the death of larval Rh6 photoreceptors and for the sensory switch of Rh5 photoreceptors to express Rh6. This fate switch of functioning, terminally differentiated neurons provides a novel, unexpected example of hard-wired sensory plasticity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2750042/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2750042/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sprecher, Simon G -- Desplan, Claude -- C06 RR-15518-01/RR/NCRR NIH HHS/ -- EY013010/EY/NEI NIH HHS/ -- R01 EY013010/EY/NEI NIH HHS/ -- R01 EY013010-01/EY/NEI NIH HHS/ -- England -- Nature. 2008 Jul 24;454(7203):533-7. doi: 10.1038/nature07062. Epub 2008 Jun 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Developmental Genetics, Department of Biology, New York University, 1090 Silver Center, 100 Washington Square East, New York, New York 10003-6688, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18594514" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Apoptosis ; *Cell Differentiation ; Drosophila/*cytology/*growth & development ; Drosophila Proteins/genetics/metabolism ; Eye/growth & development ; *Gene Expression Regulation, Developmental ; Larva/anatomy & histology/growth & development ; Metamorphosis, Biological ; Nuclear Proteins/metabolism ; Photoreceptor Cells, Invertebrate/*cytology/*metabolism ; Receptors, Steroid/metabolism ; Rhodopsin/genetics/*metabolism ; Transcription Factors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Stochasticity and cell fate (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-04-05
    Description: Fundamental to living cells is the capacity to differentiate into subtypes with specialized attributes. Understanding the way cells acquire their fates is a major challenge in developmental biology. How cells adopt a particular fate is usually thought of as being deterministic, and in the large majority of cases it is. That is, cells acquire their fate by virtue of their lineage or their proximity to an inductive signal from another cell. In some cases, however, and in organisms ranging from bacteria to humans, cells choose one or another pathway of differentiation stochastically, without apparent regard to environment or history. Stochasticity has important mechanistic requirements. We speculate on why stochasticity is advantageous-and even critical in some circumstances-to the individual, the colony, or the species.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2605794/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2605794/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Losick, Richard -- Desplan, Claude -- EY13010/EY/NEI NIH HHS/ -- GM18568/GM/NIGMS NIH HHS/ -- R01 EY013010/EY/NEI NIH HHS/ -- R01 EY013010-11/EY/NEI NIH HHS/ -- R01 GM018568/GM/NIGMS NIH HHS/ -- R01 GM018568-36/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2008 Apr 4;320(5872):65-8. doi: 10.1126/science.1147888.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18388284" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteria/*cytology ; *Bacterial Physiological Phenomena ; *Cell Differentiation ; Cell Lineage ; *Cell Physiological Phenomena ; Gene Expression Regulation ; Humans ; Stochastic Processes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Molecular biology. Hiding in plain sight (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-22
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033778/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033778/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenberg, Miriam I -- Desplan, Claude -- R01 GM064864/GM/NIGMS NIH HHS/ -- R01 GM064864-07/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 16;329(5989):284-5. doi: 10.1126/science.1192769.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Developmental Genetics, Department of Biology, New York University, New York, NY 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20647453" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Conserved Sequence ; DNA-Binding Proteins/genetics/*metabolism ; Drosophila Proteins/*genetics/metabolism ; Drosophila melanogaster/embryology/*genetics ; Embryo, Nonmammalian/*metabolism ; Epidermis/cytology ; Evolution, Molecular ; *Gene Expression Regulation, Developmental ; Genes, Insect ; Mutation ; Peptides/*genetics/metabolism ; Protein Processing, Post-Translational ; RNA, Untranslated/*genetics ; Transcription Factors/genetics/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Functional and evolutionary insights from the genomes of three parasitoid Nasonia species (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: We report here genome sequences and comparative analyses of three closely related parasitoid wasps: Nasonia vitripennis, N. giraulti, and N. longicornis. Parasitoids are important regulators of arthropod populations, including major agricultural pests and disease vectors, and Nasonia is an emerging genetic model, particularly for evolutionary and developmental genetics. Key findings include the identification of a functional DNA methylation tool kit; hymenopteran-specific genes including diverse venoms; lateral gene transfers among Pox viruses, Wolbachia, and Nasonia; and the rapid evolution of genes involved in nuclear-mitochondrial interactions that are implicated in speciation. Newly developed genome resources advance Nasonia for genetic research, accelerate mapping and cloning of quantitative trait loci, and will ultimately provide tools and knowledge for further increasing the utility of parasitoids as pest insect-control agents.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849982/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849982/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Werren, John H -- Richards, Stephen -- Desjardins, Christopher A -- Niehuis, Oliver -- Gadau, Jurgen -- Colbourne, John K -- Nasonia Genome Working Group -- Beukeboom, Leo W -- Desplan, Claude -- Elsik, Christine G -- Grimmelikhuijzen, Cornelis J P -- Kitts, Paul -- Lynch, Jeremy A -- Murphy, Terence -- Oliveira, Deodoro C S G -- Smith, Christopher D -- van de Zande, Louis -- Worley, Kim C -- Zdobnov, Evgeny M -- Aerts, Maarten -- Albert, Stefan -- Anaya, Victor H -- Anzola, Juan M -- Barchuk, Angel R -- Behura, Susanta K -- Bera, Agata N -- Berenbaum, May R -- Bertossa, Rinaldo C -- Bitondi, Marcia M G -- Bordenstein, Seth R -- Bork, Peer -- Bornberg-Bauer, Erich -- Brunain, Marleen -- Cazzamali, Giuseppe -- Chaboub, Lesley -- Chacko, Joseph -- Chavez, Dean -- Childers, Christopher P -- Choi, Jeong-Hyeon -- Clark, Michael E -- Claudianos, Charles -- Clinton, Rochelle A -- Cree, Andrew G -- Cristino, Alexandre S -- Dang, Phat M -- Darby, Alistair C -- de Graaf, Dirk C -- Devreese, Bart -- Dinh, Huyen H -- Edwards, Rachel -- Elango, Navin -- Elhaik, Eran -- Ermolaeva, Olga -- Evans, Jay D -- Foret, Sylvain -- Fowler, Gerald R -- Gerlach, Daniel -- Gibson, Joshua D -- Gilbert, Donald G -- Graur, Dan -- Grunder, Stefan -- Hagen, Darren E -- Han, Yi -- Hauser, Frank -- Hultmark, Da -- Hunter, Henry C 4th -- Hurst, Gregory D D -- Jhangian, Shalini N -- Jiang, Huaiyang -- Johnson, Reed M -- Jones, Andrew K -- Junier, Thomas -- Kadowaki, Tatsuhiko -- Kamping, Albert -- Kapustin, Yuri -- Kechavarzi, Bobak -- Kim, Jaebum -- Kim, Jay -- Kiryutin, Boris -- Koevoets, Tosca -- Kovar, Christie L -- Kriventseva, Evgenia V -- Kucharski, Robert -- Lee, Heewook -- Lee, Sandra L -- Lees, Kristin -- Lewis, Lora R -- Loehlin, David W -- Logsdon, John M Jr -- Lopez, Jacqueline A -- Lozado, Ryan J -- Maglott, Donna -- Maleszka, Ryszard -- Mayampurath, Anoop -- Mazur, Danielle J -- McClure, Marcella A -- Moore, Andrew D -- Morgan, Margaret B -- Muller, Jean -- Munoz-Torres, Monica C -- Muzny, Donna M -- Nazareth, Lynne V -- Neupert, Susanne -- Nguyen, Ngoc B -- Nunes, Francis M F -- Oakeshott, John G -- Okwuonu, Geoffrey O -- Pannebakker, Bart A -- Pejaver, Vikas R -- Peng, Zuogang -- Pratt, Stephen C -- Predel, Reinhard -- Pu, Ling-Ling -- Ranson, Hilary -- Raychoudhury, Rhitoban -- Rechtsteiner, Andreas -- Reese, Justin T -- Reid, Jeffrey G -- Riddle, Megan -- Robertson, Hugh M -- Romero-Severson, Jeanne -- Rosenberg, Miriam -- Sackton, Timothy B -- Sattelle, David B -- Schluns, Helge -- Schmitt, Thomas -- Schneider, Martina -- Schuler, Andreas -- Schurko, Andrew M -- Shuker, David M -- Simoes, Zila L P -- Sinha, Saurabh -- Smith, Zachary -- Solovyev, Victor -- Souvorov, Alexandre -- Springauf, Andreas -- Stafflinger, Elisabeth -- Stage, Deborah E -- Stanke, Mario -- Tanaka, Yoshiaki -- Telschow, Arndt -- Trent, Carol -- Vattathil, Selina -- Verhulst, Eveline C -- Viljakainen, Lumi -- Wanner, Kevin W -- Waterhouse, Robert M -- Whitfield, James B -- Wilkes, Timothy E -- Williamson, Michael -- Willis, Judith H -- Wolschin, Florian -- Wyder, Stefan -- Yamada, Takuji -- Yi, Soojin V -- Zecher, Courtney N -- Zhang, Lan -- Gibbs, Richard A -- 5R01GM070026-04/GM/NIGMS NIH HHS/ -- 5R01HG000747-14/HG/NHGRI NIH HHS/ -- 5R24GM084917-02/GM/NIGMS NIH HHS/ -- AI028309-13A2/AI/NIAID NIH HHS/ -- R01 AI055624/AI/NIAID NIH HHS/ -- R01 GM064864/GM/NIGMS NIH HHS/ -- R01 GM064864-04/GM/NIGMS NIH HHS/ -- R01 GM064864-05A2/GM/NIGMS NIH HHS/ -- R01 GM070026/GM/NIGMS NIH HHS/ -- R01 GM070026-04S1/GM/NIGMS NIH HHS/ -- R01 GM079484/GM/NIGMS NIH HHS/ -- R01 GM085163/GM/NIGMS NIH HHS/ -- R01 GM085163-01/GM/NIGMS NIH HHS/ -- R01 GM085233/GM/NIGMS NIH HHS/ -- R01 HG000747/HG/NHGRI NIH HHS/ -- R01 HG000747-14/HG/NHGRI NIH HHS/ -- R01GM064864/GM/NIGMS NIH HHS/ -- R24 GM084917/GM/NIGMS NIH HHS/ -- R24 GM084917-01/GM/NIGMS NIH HHS/ -- R24 GM084917-02/GM/NIGMS NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- U54 HG003273-03/HG/NHGRI NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):343-8. doi: 10.1126/science.1178028.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075255" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthropods/parasitology ; *Biological Evolution ; DNA Methylation ; DNA Transposable Elements ; Female ; Gene Transfer, Horizontal ; Genes, Insect ; Genetic Speciation ; Genetic Variation ; *Genome, Insect ; Host-Parasite Interactions ; Insect Proteins/genetics/metabolism ; Insect Viruses/genetics ; Insects/genetics ; Male ; Molecular Sequence Data ; Quantitative Trait Loci ; Recombination, Genetic ; Sequence Analysis, DNA ; Wasp Venoms/chemistry/toxicity ; Wasps/*genetics/physiology ; Wolbachia/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Feedback from rhodopsin controls rhodopsin exclusion in Drosophila photoreceptors (2011)
    Nature Publishing Group (NPG)
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    Publication Date: 2011-10-11
    Description: Sensory systems with high discriminatory power use neurons that express only one of several alternative sensory receptor proteins. This exclusive receptor gene expression restricts the sensitivity spectrum of neurons and is coordinated with the choice of their synaptic targets. However, little is known about how it is maintained throughout the life of a neuron. Here we show that the green-light sensing receptor rhodopsin 6 (Rh6) acts to exclude an alternative blue-sensitive rhodopsin 5 (Rh5) from a subset of Drosophila R8 photoreceptor neurons. Loss of Rh6 leads to a gradual expansion of Rh5 expression into all R8 photoreceptors of the ageing adult retina. The Rh6 feedback signal results in repression of the rh5 promoter and can be mimicked by other Drosophila rhodopsins; it is partly dependent on activation of rhodopsin by light, and relies on G(alphaq) activity, but not on the subsequent steps of the phototransduction cascade. Our observations reveal a thus far unappreciated spectral plasticity of R8 photoreceptors, and identify rhodopsin feedback as an exclusion mechanism.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3208777/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3208777/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vasiliauskas, Daniel -- Mazzoni, Esteban O -- Sprecher, Simon G -- Brodetskiy, Konstantin -- Johnston, Robert J Jr -- Lidder, Preetmoninder -- Vogt, Nina -- Celik, Arzu -- Desplan, Claude -- F32EY016309/EY/NEI NIH HHS/ -- R01 EY013012/EY/NEI NIH HHS/ -- R01 EY013012-13/EY/NEI NIH HHS/ -- R01EY13012/EY/NEI NIH HHS/ -- England -- Nature. 2011 Oct 9;479(7371):108-12. doi: 10.1038/nature10451.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Developmental Genetics, Department of Biology, New York University, New York, New York 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21983964" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Down-Regulation ; Drosophila Proteins/deficiency/genetics/metabolism ; Drosophila melanogaster/*cytology/genetics/*metabolism ; *Feedback, Sensory ; Photoreceptor Cells, Invertebrate/*metabolism ; Promoter Regions, Genetic/genetics ; Retina/cytology ; Rhodopsin/deficiency/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    Temporal patterning of Drosophila medulla neuroblasts controls neural fates (2013)
    Nature Publishing Group (NPG)
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    Publication Date: 2013-06-21
    Description: In the Drosophila optic lobes, the medulla processes visual information coming from inner photoreceptors R7 and R8 and from lamina neurons. It contains approximately 40,000 neurons belonging to more than 70 different types. Here we describe how precise temporal patterning of neural progenitors generates these different neural types. Five transcription factors-Homothorax, Eyeless, Sloppy paired, Dichaete and Tailless-are sequentially expressed in a temporal cascade in each of the medulla neuroblasts as they age. Loss of Eyeless, Sloppy paired or Dichaete blocks further progression of the temporal sequence. We provide evidence that this temporal sequence in neuroblasts, together with Notch-dependent binary fate choice, controls the diversification of the neuronal progeny. Although a temporal sequence of transcription factors had been identified in Drosophila embryonic neuroblasts, our work illustrates the generality of this strategy, with different sequences of transcription factors being used in different contexts.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3701960/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3701960/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Xin -- Erclik, Ted -- Bertet, Claire -- Chen, Zhenqing -- Voutev, Roumen -- Venkatesh, Srinidhi -- Morante, Javier -- Celik, Arzu -- Desplan, Claude -- GM058575/GM/NIGMS NIH HHS/ -- R01 EY017916/EY/NEI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jun 27;498(7455):456-62. doi: 10.1038/nature12319. Epub 2013 Jun 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, New York University, 100 Washington Square East, New York, New York 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23783517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*cytology/growth & development ; *Cell Differentiation ; *Cell Lineage ; Drosophila Proteins/metabolism ; Drosophila melanogaster/anatomy & histology/*cytology/metabolism ; Female ; Gene Expression Regulation ; Male ; Neural Stem Cells/*cytology/metabolism ; Neurons/*cytology/*metabolism ; Time Factors ; Transcription Factors/metabolism ; Visual Pathways/cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    Processing properties of ON and OFF pathways for Drosophila motion detection (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-07-22
    Description: The algorithms and neural circuits that process spatio-temporal changes in luminance to extract visual motion cues have been the focus of intense research. An influential model, the Hassenstein-Reichardt correlator, relies on differential temporal filtering of two spatially separated input channels, delaying one input signal with respect to the other. Motion in a particular direction causes these delayed and non-delayed luminance signals to arrive simultaneously at a subsequent processing step in the brain; these signals are then nonlinearly amplified to produce a direction-selective response. Recent work in Drosophila has identified two parallel pathways that selectively respond to either moving light or dark edges. Each of these pathways requires two critical processing steps to be applied to incoming signals: differential delay between the spatial input channels, and distinct processing of brightness increment and decrement signals. Here we demonstrate, using in vivo patch-clamp recordings, that four medulla neurons implement these two processing steps. The neurons Mi1 and Tm3 respond selectively to brightness increments, with the response of Mi1 delayed relative to Tm3. Conversely, Tm1 and Tm2 respond selectively to brightness decrements, with the response of Tm1 delayed compared with Tm2. Remarkably, constraining Hassenstein-Reichardt correlator models using these measurements produces outputs consistent with previously measured properties of motion detectors, including temporal frequency tuning and specificity for light versus dark edges. We propose that Mi1 and Tm3 perform critical processing of the delayed and non-delayed input channels of the correlator responsible for the detection of light edges, while Tm1 and Tm2 play analogous roles in the detection of moving dark edges. Our data show that specific medulla neurons possess response properties that allow them to implement the algorithmic steps that precede the correlative operation in the Hassenstein-Reichardt correlator, revealing elements of the long-sought neural substrates of motion detection in the fly.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4243710/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4243710/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Behnia, Rudy -- Clark, Damon A -- Carter, Adam G -- Clandinin, Thomas R -- Desplan, Claude -- OD003530/OD/NIH HHS/ -- R01 EY017916/EY/NEI NIH HHS/ -- R01EY017916/EY/NEI NIH HHS/ -- R01EY022638/EY/NEI NIH HHS/ -- England -- Nature. 2014 Aug 28;512(7515):427-30. doi: 10.1038/nature13427. Epub 2014 Jul 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Developmental Genetics, Department of Biology, New York University, New York, New York 10003-6688, USA. ; 1] Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06511, USA [2] Department of Neurobiology, Stanford University, Stanford, California 94305, USA. ; Center for Neural Science, New York University, New York, New York 10003, USA. ; Department of Neurobiology, Stanford University, Stanford, California 94305, USA. ; 1] Center for Developmental Genetics, Department of Biology, New York University, New York, New York 10003-6688, USA [2] Center for Genomics &Systems Biology, New York University Abu Dhabi Institute, Abu Dhabi, United Arab Emirates.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25043016" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Darkness ; Drosophila melanogaster/cytology/*physiology ; Lighting ; Models, Neurological ; Motion Perception/*physiology ; Neurons/cytology/physiology ; Patch-Clamp Techniques ; Photic Stimulation ; Retina/cytology/physiology ; Visual Pathways/cytology/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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    Neurobiology: Inversion in the worm (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fernandes, Vilaiwan M -- Desplan, Claude -- R01 EY013012/EY/NEI NIH HHS/ -- England -- Nature. 2015 Jul 2;523(7558):44-5. doi: 10.1038/523044a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, New York University, New York, New York 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26135446" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*physiology ; Caenorhabditis elegans Proteins/*metabolism ; Motor Neurons/*physiology ; Nerve Tissue Proteins/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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    Permissive and instructive anterior patterning rely on mRNA localization in the wasp embryo (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-03-31
    Description: The long-germ mode of embryogenesis, in which segments arise simultaneously along the anteriorposterior axis, has evolved several times in different lineages of the holometabolous, or fully metamorphosing, insects. Drosophila's long-germ fate map is established largely by the activity of the dipteran-specific Bicoid (Bcd) morphogen gradient, which operates both instructively and permissively to accomplish anterior patterning. By contrast, all nondipteran long-germ insects must achieve anterior patterning independently of bcd. We show that bcd's permissive function is mimicked in the wasp by a maternal repression system in which anterior localization of the wasp ortholog of giant represses anterior expression of the trunk gap genes so that head and thorax can properly form.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brent, Ava E -- Yucel, Gozde -- Small, Stephen -- Desplan, Claude -- GM51946/GM/NIGMS NIH HHS/ -- GM64864/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Mar 30;315(5820):1841-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉New York University, Department of Biology, Center for Developmental Genetics, 100 Washington Square East, New York, NY 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17395827" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Patterning/*genetics ; DNA-Binding Proteins/genetics/metabolism ; Embryo, Nonmammalian/*metabolism ; Embryonic Development ; *Gene Expression Regulation, Developmental ; Genes, Insect ; Head/embryology ; Insect Proteins/*genetics/metabolism ; Kruppel-Like Transcription Factors/genetics/metabolism ; Morphogenesis ; RNA Interference ; RNA, Messenger, Stored/genetics/*metabolism ; Repressor Proteins/*genetics/metabolism ; Thorax ; Wasps/*embryology/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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