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Sökning: WFRF:(Duyckaerts C.)

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  • Lauwers, E., et al. (författare)
  • Potential human transmission of amyloid beta pathology: surveillance and risks
  • 2020
  • Ingår i: Lancet Neurology. - 1474-4422 .- 1474-4465. ; 19:10, s. 872-878
  • Tidskriftsartikel (refereegranskat)abstract
    • Studies in experimental animals show transmissibility of amyloidogenic proteins associated with prion diseases, Alzheimer's disease, Parkinson's disease, and other neurodegenerative diseases. Although these data raise potential concerns for public health, convincing evidence for human iatrogenic transmission only exists for prions and amyloid beta after systemic injections of contaminated growth hormone extracts or dura mater grafts derived from cadavers. Even though these procedures are now obsolete, some reports raise the possibility of iatrogenic transmission of amyloid beta through putatively contaminated neurosurgical equipment. Iatrogenic transmission of amyloid beta might lead to amyloid deposition in the brain parenchyma and blood vessel walls, potentially resulting in cerebral amyloid angiopathy after several decades. Cerebral amyloid angiopathy can cause life-threatening brain haemorrhages; yet, there is no proof that the transmission of amyloid can also lead to Alzheimer's dementia. Large, long-term epidemiological studies and sensitive, cost-efficient tools to detect amyloid are needed to better understand any potential routes of amyloid beta transmission and to clarify whether other similar proteopathic seeds, such as tau or alpha-synuclein, can also be transferred iatrogenically.
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  • Nelson, Peter T., et al. (författare)
  • Correlation of Alzheimer Disease Neuropathologic Changes With Cognitive Status : A Review of the Literature
  • 2012
  • Ingår i: Journal of Neuropathology and Experimental Neurology. - 0022-3069 .- 1554-6578. ; 71:5, s. 362-381
  • Forskningsöversikt (refereegranskat)abstract
    • Clinicopathologic correlation studies are critically important for the field of Alzheimer disease (AD) research. Studies on human subjects with autopsy confirmation entail numerous potential biases that affect both their general applicability and the validity of the correlations. Many sources of data variability can weaken the apparent correlation between cognitive status and AD neuropathologic changes. Indeed, most persons in advanced old age have significant non-AD brain lesions that may alter cognition independently of AD. Worldwide research efforts have evaluated thousands of human subjects to assess the causes of cognitive impairment in the elderly, and these studies have been interpreted in different ways. We review the literature focusing on the correlation of AD neuropathologic changes (i.e. beta-amyloid plaques and neurofibrillary tangles) with cognitive impairment. We discuss the various patterns of brain changes that have been observed in elderly individuals to provide a perspective for understanding AD clinicopathologic correlation and conclude that evidence from many independent research centers strongly supports the existence of a specific disease, as defined by the presence of AA plaques and neurofibrillary tangles. Although AA plaques may play a key role in AD pathogenesis, the severity of cognitive impairment correlates best with the burden of neocortical neurofibrillary tangles.
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