2020
Cellular Expression and Functional Roles of All 26 Neurotransmitter GPCRs in the C. elegans Egg-Laying Circuit
Fernandez RW, Wei K, Wang EY, Mikalauskaite D, Olson A, Pepper J, Christie N, Kim S, Weissenborn S, Sarov M, Koelle MR. Cellular Expression and Functional Roles of All 26 Neurotransmitter GPCRs in the C. elegans Egg-Laying Circuit. Journal Of Neuroscience 2020, 40: 7475-7488. PMID: 32847964, PMCID: PMC7511189, DOI: 10.1523/jneurosci.1357-20.2020.Peer-Reviewed Original ResearchConceptsEgg-laying circuitNeurotransmitter GPCREgg-laying defectsModel organismsNeural circuitsExtrasynaptic signalsStandard laboratory conditionsSuch signalingGPCR expressionCell typesFunctional roleGPCRsNeurotransmitter signalsCellular expressionActivity of neuronsModel systemEpithelial cellsReceptor functionOrganismsNeurotransmitter receptorsLaboratory conditionsDistinct receptorsReceptor knockoutParkinson's diseaseCells
2019
Serotonin and neuropeptides are both released by the HSN command neuron to initiate C. elegans egg laying
Brewer JC, Olson AC, Collins KM, Koelle MR. Serotonin and neuropeptides are both released by the HSN command neuron to initiate C. elegans egg laying. PLOS Genetics 2019, 15: e1007896. PMID: 30677018, PMCID: PMC6363226, DOI: 10.1371/journal.pgen.1007896.Peer-Reviewed Original ResearchConceptsHermaphrodite-specific neuronsEgg-laying defectsNLP-3C. elegansEgg-laying musclesEgg-laying circuitDirect postsynaptic targetsEgg-laying behaviorSerotonergic Hermaphrodite Specific NeuronsMuscle cellsSmall molecule neurotransmittersNull mutantsHSN neuronsDouble mutantSingle mutantsMutant animalsSerotonergic neuronsWild-type animalsSevere defectsMutantsElegansNeuropeptide substance PMammalian brainEggsSpecific neurons
2016
Activity of the C. elegans egg-laying behavior circuit is controlled by competing activation and feedback inhibition
Collins KM, Bode A, Fernandez RW, Tanis JE, Brewer JC, Creamer MS, Koelle MR. Activity of the C. elegans egg-laying behavior circuit is controlled by competing activation and feedback inhibition. ELife 2016, 5: e21126. PMID: 27849154, PMCID: PMC5142809, DOI: 10.7554/elife.21126.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCaenorhabditis elegansCaenorhabditis elegans ProteinsChloride ChannelsCholineFeedback, PhysiologicalFemaleGene Expression RegulationLocomotionMotor NeuronsMuscle ContractionOptogeneticsOvipositionPeriodicityReceptors, Biogenic AmineSerotoninSexual Behavior, AnimalSignal TransductionTyramineConceptsPassage of eggsUnderlying neural circuitsUv1 neuroendocrine cellsCommand neuronsMuscle contractionNeural circuitsNeuroendocrine cellsRhythmic activityBehavior circuitsCircuit activityCentral pattern generatorCircuit functionBody bendsFeedback inhibitionSlow locomotionPattern generatorNeuronsActivityVulva
2013
Postsynaptic ERG Potassium Channels Limit Muscle Excitability to Allow Distinct Egg-Laying Behavior States in Caenorhabditis elegans
Collins KM, Koelle MR. Postsynaptic ERG Potassium Channels Limit Muscle Excitability to Allow Distinct Egg-Laying Behavior States in Caenorhabditis elegans. Journal Of Neuroscience 2013, 33: 761-775. PMID: 23303953, PMCID: PMC3542984, DOI: 10.1523/jneurosci.3896-12.2013.Peer-Reviewed Original ResearchConceptsEgg-laying musclesBody bendsUNC-103Caenorhabditis elegansCalcium transientsTwo-state behaviorERG potassium channelsMutantsERG channelsPotassium channelsInactive phaseEggsDistinct behavioral statesMuscle excitabilityPostsynaptic excitabilityPostsynaptic sitesERG functionCaenorhabditisCalcium imagingElegansFurther adjustmentExcitabilityRhythmic excitationMuscleBehavioral statesLIN-12/Notch signaling instructs postsynaptic muscle arm development by regulating UNC-40/DCC and MADD-2 in Caenorhabditis elegans
Li P, Collins KM, Koelle MR, Shen K. LIN-12/Notch signaling instructs postsynaptic muscle arm development by regulating UNC-40/DCC and MADD-2 in Caenorhabditis elegans. ELife 2013, 2: e00378. PMID: 23539368, PMCID: PMC3601818, DOI: 10.7554/elife.00378.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, Genetically ModifiedCaenorhabditis elegansCaenorhabditis elegans ProteinsCalcium SignalingCell Adhesion MoleculesFemaleGenotypeIntracellular Signaling Peptides and ProteinsMorphogenesisMuscle ContractionMusclesMutationNeurogenesisOvipositionParacrine CommunicationPhenotypeReceptors, NotchSignal TransductionSodium ChannelsSynapsesVulvaConceptsPrecise synaptic connectivityNon-target musclesForm synapsesMADD-2Types of musclePresynaptic neuronsSynaptic targetsSynaptic connectivityCardinal featuresNervous systemGuidance moleculesTarget cellsLIN-12/NotchUNC-40/DCCMuscleCell typesArm extensionCellsMuscle armsEctopic expressionDiverse cell typesDCCArmExpressionNeurons
2008
Regulation of Serotonin Biosynthesis by the G Proteins Gαo and Gαq Controls Serotonin Signaling in Caenorhabditis elegans
Tanis JE, Moresco JJ, Lindquist RA, Koelle MR. Regulation of Serotonin Biosynthesis by the G Proteins Gαo and Gαq Controls Serotonin Signaling in Caenorhabditis elegans. Genetics 2008, 178: 157-169. PMID: 18202365, PMCID: PMC2206068, DOI: 10.1534/genetics.107.079780.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiomarkersCaenorhabditis elegansCaenorhabditis elegans ProteinsGene Expression Regulation, EnzymologicGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11Motor NeuronsMusclesOrgan SpecificityOvipositionPromoter Regions, GeneticSerotoninSignal TransductionSynapsesTryptophan HydroxylaseConceptsEgg-laying behaviorCaenorhabditis elegansG proteinsEgg-laying systemHSN motor neuronsSerotonin biosynthesisG protein GαoLevel of transcriptionEpistasis experimentsTPH-1 expressionRate-limiting enzymeGene dosageSpecific genesGalphaoGalphaqTranscriptionBiosynthesisMotor neuronsElegansTPH-1Neurotransmitter releaseGenesMultiple signalsProteinEggs
2007
A Specific Subset of Transient Receptor Potential Vanilloid-Type Channel Subunits in Caenorhabditis elegans Endocrine Cells Function as Mixed Heteromers to Promote Neurotransmitter Release
Jose AM, Bany IA, Chase DL, Koelle MR. A Specific Subset of Transient Receptor Potential Vanilloid-Type Channel Subunits in Caenorhabditis elegans Endocrine Cells Function as Mixed Heteromers to Promote Neurotransmitter Release. Genetics 2007, 175: 93-105. PMID: 17057248, PMCID: PMC1774992, DOI: 10.1534/genetics.106.065516.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsAnimals, Genetically ModifiedBiological TransportCaenorhabditis elegansCaenorhabditis elegans ProteinsEndocrine GlandsFemaleIon ChannelsMolecular Sequence DataNerve Tissue ProteinsNeurosecretory SystemsOvipositionSequence Homology, Amino AcidTRPV Cation ChannelsConceptsOCR-2Neuroendocrine cellsEgg-laying defectsTRPV channel OSM-9Heteromeric channelsG protein GDominant negative mutantTransient receptor potential channelsEndocrine cell functionOSM-9Heteromeric partnerTRPV channelsSensory neuronsSingle knockoutDetectable functionOCR-1Premature eggsSensory transductionChannel subunitsDetectable roleSubunit compositionCell functionRelease of neurotransmittersNeurotransmitter releaseSubunit combinations
2004
Activation of EGL-47, a Gαo-Coupled Receptor, Inhibits Function of Hermaphrodite-Specific Motor Neurons to Regulate Caenorhabditis elegans Egg-Laying Behavior
Moresco JJ, Koelle MR. Activation of EGL-47, a Gαo-Coupled Receptor, Inhibits Function of Hermaphrodite-Specific Motor Neurons to Regulate Caenorhabditis elegans Egg-Laying Behavior. Journal Of Neuroscience 2004, 24: 8522-8530. PMID: 15456826, PMCID: PMC6729914, DOI: 10.1523/jneurosci.1915-04.2004.Peer-Reviewed Original ResearchConceptsHermaphrodite-specific neuronsEgg-laying behaviorTransmembrane domainEgg-laying defectsEgg-laying musclesDominant mutationsHSN motor neuronsFluorescent protein transgeneSixth transmembrane domainExtracellular N-terminusEgg-laying frequencyMotor neuronsN-terminusG proteinsTransgenic expressionGenesCaenorhabditisMild defectsReceptor isoformsInhibits functionMutationsMultiple receptorsEggsReceptorsNumber of neuronsGenetic Analysis of RGS Protein Function in Caenorhabditis elegans
Chase DL, Koelle MR. Genetic Analysis of RGS Protein Function in Caenorhabditis elegans. Methods In Enzymology 2004, 389: 305-320. PMID: 15313573, DOI: 10.1016/s0076-6879(04)89018-9.Peer-Reviewed Original ResearchConceptsRGS proteinsC. elegansG proteinsRGS protein functionStructure/function studiesG protein geneCaenorhabditis elegansGalpha mutantsClose homologProtein functionGalpha proteinsElegansGenetic analysisDetailed protocolTransgenic expressionProteinMost mammaliansMutantsFunction studiesOrthologsCaenorhabditisHomologMammalianGenesOrganisms
2003
Genetic and Cellular Basis for Acetylcholine Inhibition of Caenorhabditis elegans Egg-Laying Behavior
Bany IA, Dong MQ, Koelle MR. Genetic and Cellular Basis for Acetylcholine Inhibition of Caenorhabditis elegans Egg-Laying Behavior. Journal Of Neuroscience 2003, 23: 8060-8069. PMID: 12954868, PMCID: PMC6740490, DOI: 10.1523/jneurosci.23-22-08060.2003.Peer-Reviewed Original ResearchMeSH KeywordsAcetylcholineAcetylcholinesteraseAnimalsAnimals, Genetically ModifiedBehavior, AnimalCaenorhabditis elegansCaenorhabditis elegans ProteinsCholinesterase InhibitorsDNA, ComplementaryGTP-Binding ProteinsHomeodomain ProteinsInhibition, PsychologicalMutationNeuronsNuclear ProteinsOvipositionPhenotypeReceptors, CholinergicSignal TransductionSynapsesConceptsHermaphrodite-specific neuronsEgg-laying behaviorG proteinsG-protein signaling genesEgg-laying defectsEgg-laying musclesEgg-laying systemAnalysis of mutantsInhibition of eggSerotonergic Hermaphrodite Specific NeuronsUnc-4Caenorhabditis elegansUnc-17Signaling GenesThird cell typeActivation of eggsMorphological defectsCha-1MutantsCell typesCellular basisNeurotransmitter releaseGenesEggsPartial defect
2001
Two RGS proteins that inhibit Gαo and Gαq signaling in C. elegans neurons require a Gβ5-like subunit for function
Chase D, Patikoglou G, Koelle M. Two RGS proteins that inhibit Gαo and Gαq signaling in C. elegans neurons require a Gβ5-like subunit for function. Current Biology 2001, 11: 222-231. PMID: 11250150, DOI: 10.1016/s0960-9822(01)00071-9.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, Genetically ModifiedBehavior, AnimalCaenorhabditis elegansCaenorhabditis elegans ProteinsGene ExpressionGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11GTP-Binding Protein beta SubunitsGTP-Binding Protein RegulatorsGTP-Binding ProteinsHelminth ProteinsHeterotrimeric GTP-Binding ProteinsMiceNeuronsOvipositionRGS ProteinsSignal TransductionTransgenesConceptsRGS proteinsEGL-10EAT-16C. elegansG protein signaling (RGS) proteinsG protein heterotrimersC. elegans neuronsG protein signalingGPB-2Gbeta proteinsGTPase activatorNull mutantsRGS activityDouble mutantSignaling proteinsProtein signalingG proteinsPhysiological roleMutantsProteinKnockout animalsElegansObvious defectsRGSSubunits