LeptinReceptors, LeptinDucksHepatitis B Virus, DuckRecombinant ProteinsAdministration, OralHepatitis Virus, DuckHepadnaviridae InfectionsMolecular Sequence DataRecombinant Fusion ProteinsDNA, RecombinantAmino Acid SequenceDose-Response Relationship, DrugBase SequenceTime FactorsCloning, MolecularRats, Sprague-DawleyHepatitis, Viral, AnimalGenetic VectorsDrug Administration ScheduleInjections, IntravenousMice, Inbred C57BLLiverRats, WistarRNA, MessengerBody WeightEatingHypothalamusDisease Models, AnimalCell LineCells, CulturedEscherichia coliUnited States Food and Drug AdministrationDrug Administration RoutesObesityMice, Inbred BALB CVaccines, SyntheticInsulinGene ExpressionPoultry DiseasesAdministration, IntranasalInjections, IntraventricularInjections, SubcutaneousAdipose TissueInjections, IntraperitonealKineticsRecombination, GeneticProteinsChickensReceptors, Cell SurfaceEnzyme-Linked Immunosorbent AssayPlasmidsMice, ObeseGeeseBlotting, WesternMardivirusInfluenza in BirdsBaculoviridaeRabbitsVirus ReplicationSignal TransductionDNA, ViralInjections, IntramuscularDNA PrimersBlood GlucoseGene Expression RegulationSequence Homology, Amino AcidProtein BindingInfusions, IntravenousTransfectionAntibodies, MonoclonalCricetinaeCarrier ProteinsDogsKidneyAdenoviridaeSpecies SpecificityReverse Transcriptase Polymerase Chain ReactionDNA, ComplementaryGhrelinAdministration, RectalAdiponectinArcuate NucleusHalf-LifeTissue DistributionAntibodies, ViralEnergy MetabolismBrainElectrophoresis, Polyacrylamide GelPregnancyDrug InteractionsBiological AvailabilitySTAT3 Transcription FactorSalt GlandCattleArea Under CurveMice, KnockoutGenetic TherapyPeptide FragmentsFasting