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Cortical oxygen supply during postural hypotension is further decreased in Alzheimer’s disease, but unrelated to cholinesterase-inhibitor use

Cerebrovascular function and structure of the cortical cerebral microvessels are profoundly altered in patients with Alzheimer’s disease (AD). The functional hemodynamic consequences of such changes, however, remain essentially unknown. Cholinesterase inhibitors (ChEIs) potentially affect brain perfusion through either augmentation or inhibition of cerebral vasodilatation. This study investigated the cerebrovascular regulation during postural changes in AD […]

CSF α-synuclein concentrations do not fluctuate over hours and are not correlated to amyloid β in humans

Reports on the value of cerebrospinal fluid (CSF) α-synuclein as a biomarker for dementia with Lewy bodies and Parkinson disease are contradicting. This may be explained by fluctuating CSF α-synuclein concentrations over time. Such fluctuations have been suggested for CSF amyloid β concentrations. Furthermore, a physiological relationship between α-synuclein and amyloid β has been suggested […]

Effect of 1 night of total sleep deprivation on cerebrospinal fluid β-amyloid 42 in healthy middle-aged men: a randomized clinical trial

Importance: Increasing evidence suggests a relationship between poor sleep and the risk of developing Alzheimer disease. A previous study found an effect of sleep on β-amyloid (Aβ), which is a key protein in Alzheimer disease pathology.; Objective: To determine the effect of 1 night of total sleep deprivation on cerebrospinal fluid Aβ42 protein levels in […]