Karoglu, Elif TugceHalim, Dilara OzgeErkaya, BahriyeAltaytas, FerdaArslan-Ergul, AycaKonu, OzlenAdams, Michelle M.2018-04-122018-04-122017-060197-4580http://hdl.handle.net/11693/37350The zebrafish has become a popular model for studying normal brain aging due to its large fecundity, conserved genome, and available genetic tools; but little data exists about neurobiological age-related alterations. The current study tested the hypothesis of an association between brain aging and synaptic protein loss across males and females. Western blot analysis of synaptophysin (SYP), a presynaptic vesicle protein, and postsynaptic density-95 (PSD-95) and gephyrin (GEP), excitatory and inhibitory postsynaptic receptor-clustering proteins, respectively, was performed in young, middle-aged, and old male and female zebrafish (Danio rerio) brains. Univariate and multivariate analyses demonstrated that PSD-95 significantly increased in aged females and SYP significantly decreased in males, but GEP was stable. Thus, these key synaptic proteins vary across age in a sexually dimorphic manner, which has been observed in other species, and these consequences may represent selective vulnerabilities for aged males and females. These data expand our knowledge of normal aging in zebrafish, as well as further establish this model as an appropriate one for examining human brain aging.EnglishAgingExcitatory synapsesGenderInhibitory synapsesSynaptic proteinsZebrafishBeta tubulinGephyrinPostsynaptic density protein 95SynaptophysinCarrier proteinGephyrinMembrane proteinSAP90/PSD95 associated proteinsynaptophysinAdultAgedAnimal tissueBrain levelControlled studyJuvenile animalNonhumanProtein analysisProtein depletionProtein expressionProtein functionProtein localizationSequence homologySex differenceSynaptic transmissionWestern blottingZebra fishAnalysis of varianceAnimalAnimal modelBrainGeneticsHumanMetabolismPhysiologySexual characteristicsSynapseBrainCarrier ProteinsSAP90-PSD95 Associated ProteinsSex CharacteristicsSynapsesSynaptophysinArticle10.1016/j.neurobiolaging.2017.02.007