0000000000740564

AUTHOR

Jana Renziehausen

showing 2 related works from this author

The Cleavage Product of Amyloid-β Protein Precursor sAβPPα Modulates BAG3-Dependent Aggresome Formation and Enhances Cellular Proteasomal Activity

2015

Alzheimer's disease (AD) is the major age-associated form of dementia characterized by gradual cognitive decline. Aberrant cleavage of the amyloid-β protein precursor (AβPP) is thought to play an important role in the pathology of this disease. Two principal AβPP processing pathways exist: amyloidogenic cleavage of AβPP resulting in production of the soluble N-terminal fragment sAβPPβ, amyloid-β (Aβ), which accumulates in AD brain, and the AβPP intracellular domain (AICD) sAβPPα, p3 and AICD are generated in the non-amyloidogenic pathway. Prevalence of amyloidogenic versus non-amyloidogenic processing leads to depletion of sAβPPα and an increase in Aβ. Although sAβPPα is a well-accepted neu…

Proteasome Endopeptidase ComplexTime FactorsCell SurvivalLeupeptinsGreen Fluorescent ProteinsCysteine Proteinase InhibitorsProtein degradationProtein aggregationBiologyTransfectionBAG3Rats Sprague-DawleyAmyloid beta-Protein PrecursorAnimalsHumansRNA MessengerRNA Small InterferingProtein precursorCells CulturedAdaptor Proteins Signal TransducingNeuronsAmyloid beta-PeptidesDose-Response Relationship DrugGeneral NeuroscienceHEK 293 cellsBrainGeneral MedicineFibroblastsEmbryo MammalianRatsCell biologyPsychiatry and Mental healthClinical PsychologyHEK293 CellsProteostasisAggresomeGene Expression RegulationBiochemistryProteasomeProteolysisAmyloid Precursor Protein SecretasesGeriatrics and GerontologyApoptosis Regulatory ProteinsJournal of Alzheimer's Disease
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Downregulation of PMCA2 increases the vulnerability of midbrain neurons to mitochondrial complex I inhibition

2013

Parkinson's disease is an age-associated disorder characterized by selective degeneration of dopaminergic neurons. The molecular mechanisms underlying the selective vulnerability of this subset of neurons are, however, not fully understood. Employing SH-SY5Y neuroblastoma cells and primary mesencephalic neurons, we here demonstrate a significant increase in cytosolic calcium after inhibition of mitochondrial complex I by means of MPP(+), which is a well-established environmental toxin-based in vitro model of Parkinson's disease. This increase in calcium is correlated with a downregulation of the neuron-specific plasma membrane Ca(2+)-ATPase isoform 2 (PMCA2). Interestingly, two other import…

Male1-Methyl-4-phenylpyridiniummedicine.medical_specialtySERCADown-Regulationchemistry.chemical_elementCalciumToxicologyCREBRats Sprague-DawleyPlasma Membrane Calcium-Transporting ATPaseschemistry.chemical_compoundDownregulation and upregulationMesencephalonCell Line TumorInternal medicinemedicineAnimalsHumansCyclic AMP Response Element-Binding ProteinNeuronsCalcium metabolismElectron Transport Complex IbiologyGeneral NeuroscienceMPTPNeurodegenerationmedicine.diseaseRatsEndocrinologychemistrybiology.proteinCalciumsense organsIntracellularNeuroToxicology
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