Search results for "Nicastrin"

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Vitamin D and Its Analogues Decrease Amyloid-β (Aβ) Formation and Increase Aβ-Degradation

2017

Alzheimer’s disease (AD) is characterized by extracellular plaques in the brain, mainly consisting of amyloid-β (Aβ), as derived from sequential cleavage of the amyloid precursor protein. Epidemiological studies suggest a tight link between hypovitaminosis of the secosteroid vitamin D and AD. Besides decreased vitamin D level in AD patients, an effect of vitamin D on Aβ-homeostasis is discussed. However, the exact underlying mechanisms remain to be elucidated and nothing is known about the potential effect of vitamin D analogues. Here we systematically investigate the effect of vitamin D and therapeutically used analogues (maxacalcitol, calcipotriol, alfacalcidol, paricalcitol, doxercalcife…

0301 basic medicineParicalcitolPlaque Amyloidvitamin Damyloid precursor proteinlcsh:ChemistrySecosteroidMicechemistry.chemical_compound0302 clinical medicinevitamin D analoguesvitamin D; vitamin D analogues; amyloid precursor protein; amyloid-β; secretases; Aβ-degradationAmyloid precursor proteinlcsh:QH301-705.5CalcipotriolSpectroscopybiologysecretasesBrainAlfacalcidolVitaminsGeneral Medicine3. Good healthComputer Science ApplicationsFemalemedicine.drugmedicine.medical_specialtyAβ-degradationNicastrinamyloid-βArticleCatalysisInorganic Chemistry03 medical and health sciencesCell Line TumorInternal medicinemedicineVitamin D and neurologyAnimalsHumansPhysical and Theoretical ChemistryMolecular BiologyAmyloid beta-PeptidesOrganic ChemistryMice Inbred C57BL030104 developmental biologyEndocrinologylcsh:Biology (General)lcsh:QD1-999chemistryProteolysisbiology.proteinAmyloid Precursor Protein SecretasesAmyloid precursor protein secretase030217 neurology & neurosurgeryInternational Journal of Molecular Sciences
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Down-regulation of Endogenous Amyloid Precursor Protein Processing due to Cellular Aging

2005

Processing of amyloid precursor protein (APP) is a well acknowledged central pathogenic mechanism in Alzheimer disease. However, influences of age-associated cellular alterations on the biochemistry of APP processing have not been studied in molecular detail so far. Here, we report that processing of endogenous APP is down-regulated during the aging of normal human fibroblasts (IMR-90). The generation of intracellular APP cleavage products C99, C83, and AICD gradually declines with increasing life span and is accompanied by a reduced secretion of soluble APP (sAPP) and sAPPalpha. Further, the maturation of APP was reduced in senescent cells, which has been shown to be directly mediated by a…

ADAM10NicastrinEndogenyBiochemistryCell LineAmyloid beta-Protein PrecursorMembrane MicrodomainsDownregulation and upregulationEndopeptidasesmental disordersPresenilin-1Amyloid precursor proteinAspartic Acid EndopeptidasesHumansSecretionMolecular BiologyCellular SenescenceMembrane GlycoproteinsbiologyChemistryMembrane ProteinsCell BiologyFibroblastsCholesterolBiochemistrybiology.proteinAmyloid Precursor Protein SecretasesProtein Processing Post-TranslationalAmyloid precursor protein secretaseIntracellularJournal of Biological Chemistry
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