Search results for "Agouti-Related Protein"

showing 3 items of 3 documents

Evidence for hypothalamic ketone bodies sensing: impact on food intake and peripheral metabolic responses in mice

2016

Monocarboxylates have been implicated in the control of energy homeostasis. Among them, the putative role of ketone bodies produced notably during high-fat diet (HFD) has not been thoroughly explored. In this study, we aimed to determine the impact of a specific rise in cerebral ketone bodies on food intake and energy homeostasis regulation. A carotid infusion of ketone bodies was performed on mice to stimulate sensitive brain areas for 6 or 12 h. At each time point, food intake and different markers of energy homeostasis were analyzed to reveal the consequences of cerebral increase in ketone body level detection. First, an increase in food intake appeared over a 12-h period of brain keton…

Blood GlucoseMale0301 basic medicineobesitynervous-systemPhysiology[ SDV.AEN ] Life Sciences [q-bio]/Food and NutritionEndocrinology Diabetes and MetabolismKetone BodiesEnergy homeostasisEatingMicebodiesHomeostasisGlucose homeostasisoxidative stressAgouti-Related ProteinNeuropeptide YPhosphorylationmonocarboxylate transporters2. Zero hunger[ SDV.MHEP.PHY ] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]fat massHypothalamusKetone bodiesStarvation responseketogenic mediterranean dietweight-lossmedicine.medical_specialtybeta-hydroxybutyrateHypothalamusBiologyDiet High-Fat03 medical and health sciencesInsulin resistancerat-brainPhysiology (medical)Internal medicinemedicine[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]Animalsglucose homeostasisAdenylate Kinase/metabolism; Agouti-Related Protein/metabolism; Animals; Blood Glucose; Diet High-Fat; Eating/drug effects; Eating/physiology; Energy Metabolism/drug effects; Energy Metabolism/physiology; Gluconeogenesis/drug effects; Gluconeogenesis/physiology; Homeostasis; Hypothalamus/drug effects; Hypothalamus/metabolism; Insulin Resistance/physiology; Ketone Bodies/pharmacology; Male; Mice; Mice Inbred C57BL; Neuropeptide Y/metabolism; Phosphorylation/drug effectsenergy homeostasisAdenylate KinaseGluconeogenesismedicine.diseaseMice Inbred C57BL030104 developmental biologyEndocrinologyGluconeogenesislow-carbohydrateInsulin ResistanceEnergy Metabolism[SDV.AEN]Life Sciences [q-bio]/Food and NutritionHomeostasis
researchProduct

Agouti-Related Proteins (AGRPs) and Agouti-Signaling Peptide (ASIP) in Fish and Chicken

2005

We performed an intensive search on sequence databases to identify orthologues of ASIP and AGRP peptides in a number of different species, revealing a number of genomic fragments coding for the C-terminal part of agouti-related motifs, different from annotated peptide sequences, including one fragment from chicken, two from zebrafish, two from Fugu (Takifugu rubripes), and three from Tetraodon (Tetraodon nigroviridis). We have thus shown for the first time that both AGRP and ASIP genes exist in many species in "lower vertebrates" and were most probably present in early stages of vertebrate evolution.

Takifugu rubripesMolecular Sequence DataTetraodon nigroviridisGeneral Biochemistry Genetics and Molecular BiologySpecies SpecificityHistory and Philosophy of Sciencebiology.animalDatabases GeneticAnimalsAgouti-Related ProteinAmino Acid SequenceTetraodonGeneZebrafishPeptide sequencePhylogenyGeneticsbiologyFuguGeneral Neurosciencedigestive oral and skin physiologyFishesProteinsVertebratebiology.organism_classificationAgouti Signaling ProteinIntercellular Signaling Peptides and ProteinsChickensAnnals of the New York Academy of Sciences
researchProduct

Agouti-related peptide-expressing neurons are mandatory for feeding.

2005

Multiple hormones controlling energy homeostasis regulate the expression of neuropeptide Y (NPY) and agouti-related peptide (AgRP) in the arcuate nucleus of the hypothalamus. Nevertheless, inactivation of the genes encoding NPY and/or AgRP has no impact on food intake in mice. Here we demonstrate that induced selective ablation of AgRP-expressing neurons in adult mice results in acute reduction of feeding, demonstrating direct evidence for a critical role of these neurons in the regulation of energy homeostasis.

medicine.medical_specialtyPro-OpiomelanocortinTime FactorsPeptideCell CountBiologyEnergy homeostasisEatingMiceArcuate nucleusInternal medicinemedicineAnimalsAgouti-Related ProteinDiphtheria ToxinNeuropeptide YRegulation of gene expressionchemistry.chemical_classificationMice KnockoutNeuronsGeneral Neurosciencedigestive oral and skin physiologyBody WeightArcuate Nucleus of HypothalamusProteinsFeeding BehaviorNeuropeptide Y receptorbeta-GalactosidaseAnorexiaEndocrinologynervous systemchemistryGene Expression RegulationHypothalamusIntercellular Signaling Peptides and ProteinsAgouti-related peptidehormones hormone substitutes and hormone antagonistsHormoneNature neuroscience
researchProduct