کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8686426 | 1580609 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Monomeric amyloid-β reduced amyloid-β oligomer-induced synapse damage in neuronal cultures
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کلمات کلیدی
AβVAMPGPicPLA2PLAPAPPcytoplasmic phospholipase A2PrPcCSPmAbSDSenzyme-linked immunoassay - آزمایش ایمنی مرتبط با آنزیمamyloid-β - آمیلوئید βMonoclonal antibody - آنتی بادی مونوکلونالphospholipase A2 - آنزیم فسفولیپاز A2 standard deviation - انحراف معیارOligomers - اولیگومرهاAlzheimer's disease - بیماری آلزایمرELISA - تست الیزاsodium dodecyl sulphate - سدیم دودسیل سولفاتSynapses - سیناپس هاFab - فابfragment antigen-binding - قطعه آنتیژن اتصالMonomers - مونومرهاVesicle-associated membrane protein - پروتئین غشاء مرتبط با Vesicleamyloid precursor protein - پروتئین پیش ماده آمیلوئیcellular prion protein - پروتون پریون سلولیprostaglandin - پروستاگلاندینهاcholesterol - کلسترولglycosylphosphatidylinositol - گلیکوزیل فسفاتیدیلینوزیتول
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
عصب شناسی
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چکیده انگلیسی
Alzheimer's disease is a progressive neurodegenerative disease characterized by the accumulation of amyloid-β (Aβ) in the brain. Aβ oligomers are believed to cause synapse damage resulting in the memory deficits that are characteristic of this disease. Since the loss of synaptic proteins in the brain correlates closely with the degree of dementia in Alzheimer's disease, the process of Aβ-induced synapse damage was investigated in cultured neurons by measuring the loss of synaptic proteins. Soluble Aβ oligomers, derived from Alzheimer's-affected brains, caused the loss of cysteine string protein and synaptophysin from neurons. When applied to synaptosomes Aβ oligomers increased cholesterol concentrations and caused aberrant activation of cytoplasmic phospholipase A2 (cPLA2). In contrast, Aβ monomer preparations did not affect cholesterol concentrations or activate synaptic cPLA2, nor did they damage synapses. The Aβ oligomer-induced aggregation of cellular prion proteins (PrPC) at synapses triggered the activation of cPLA2 that leads to synapse degeneration. Critically, Aβ monomer preparations did not cause the aggregation of PrPC; rather they reduced the Aβ oligomer-induced aggregation of PrPC. The presence of Aβ monomer preparations also inhibited the Aβ oligomer-induced increase in cholesterol concentrations and activation of cPLA2 in synaptosomes and protected neurons against the Aβ oligomer-induced synapse damage. These results support the hypothesis that Aβ monomers are neuroprotective. We hypothesise that synapse damage may result from a pathological Aβ monomer:oligomer ratio rather than the total concentrations of Aβ within the brain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Disease - Volume 111, March 2018, Pages 48-58
Journal: Neurobiology of Disease - Volume 111, March 2018, Pages 48-58
نویسندگان
Clive Bate, Alun Williams,