0000000001274835

AUTHOR

Altenhein Benjamin

showing 2 related works from this author

Antagonistic feedback loops involving Rau and Sprouty in the Drosophila eye control neuronal and glial differentiation.

2013

During development, differentiation is often initiated by the activation of different receptor tyrosine kinases (RTKs), which results in the tightly regulated activation of cytoplasmic signaling cascades. In the differentiation of neurons and glia in the developing Drosophila eye, we found that the proper intensity of RTK signaling downstream of fibroblast growth factor receptor (FGFR) or epidermal growth factor receptor required two mutually antagonistic feedback loops. We identified a positive feedback loop mediated by the Ras association (RA) domain-containing protein Rau that sustained Ras activity and counteracted the negative feedback loop mediated by Sprouty. Rau has two RA domains t…

Receptors SteroidGTP'Blotting WesternIn situ hybridizationEyeBiochemistryReceptor tyrosine kinaseMicroscopy Electron TransmissionAnimalsDrosophila ProteinsEpidermal growth factor receptorReceptorMolecular BiologyTranscription factorIn Situ HybridizationFeedback PhysiologicalbiologyIntracellular Signaling Peptides and ProteinsMembrane ProteinsReceptor Protein-Tyrosine KinasesCell DifferentiationCell BiologyAnatomyPhenotypeImmunohistochemistryCell biologyProtein Structure TertiaryDNA-Binding ProteinsEnzyme ActivationCOUP Transcription FactorsGene Expression RegulationFibroblast growth factor receptorbiology.proteinDrosophilaNeurogliaProtein BindingSignal TransductionScience signaling
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Tyramine Actions on

2017

The biogenic amines octopamine (OA) and tyramine (TA) modulate insect motor behavior in an antagonistic manner. OA generally enhances locomotor behaviors such as Drosophila larval crawling and flight, whereas TA decreases locomotor activity. However, the mechanisms and cellular targets of TA modulation of locomotor activity are incompletely understood. This study combines immunocytochemistry, genetics and flight behavioral assays in the Drosophila model system to test the role of a candidate enzyme for TA catabolism, named Nazgul (Naz), in flight motor behavioral control. We hypothesize that the dehydrogenase/reductase Naz represents a critical step in TA catabolism. Immunocytochemistry rev…

flightmodulationbiogenic aminegliaDrosophilatyramineNeuroscienceOriginal ResearchFrontiers in systems neuroscience
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