Dietary restriction (DR) delays aging, but the mechanism remains unclear. We identified polymorphisms in mtd, the fly homolog of OXR1, which influenced lifespan and mtd expression in response to DR. Knockdown in adulthood inhibited DR-mediated lifespan extension in female flies. We found that mtd/OXR1 expression declines with age and it interacts with the retromer, which regulates trafficking of proteins and lipids.… Continue reading OXR1 maintains the retromer to delay brain #aging under #dietary restriction
Category: Neurology
#Statins and cognitive decline in patients with #Alzheimer’s and mixed dementia: a longitudinal registry-based cohort study
BackgroundDisturbances in brain cholesterol homeostasis may be involved in the pathogenesis of Alzheimer’s disease (AD). Lipid-lowering medications could interfere with neurodegenerative processes in AD through cholesterol metabolism or other mechanisms.ObjectiveTo explore the association between the use of lipid-lowering medications and cognitive decline over time in a cohort of patients with AD or mixed dementia with… Continue reading #Statins and cognitive decline in patients with #Alzheimer’s and mixed dementia: a longitudinal registry-based cohort study
Effects of calibrated blue–yellow changes in light on the human #circadian clock
Evening exposure to short-wavelength light can affect the circadian clock, sleep and alertness. Intrinsically photosensitive retinal ganglion cells expressing melanopsin are thought to be the primary drivers of these effects. Whether colour-sensitive cones also contribute is unclear. Here, using calibrated silent-substitution changes in light colour along the blue–yellow axis, we investigated whether mechanisms of colour… Continue reading Effects of calibrated blue–yellow changes in light on the human #circadian clock
Clinically apparent #Helicobacter pylori infection and the risk of incident #Alzheimer’s disease: A population-based nested case-control study
INTRODUCTIONOur population-based study assessed whether clinically apparent Helicobacter pylori infection (CAHPI) is associated with the risk of Alzheimer's disease (AD).METHODSWe assembled a population-based cohort of all dementia-free subjects in the United Kingdom's Clinical Practice Research Datalink (UK CPRD), aged ≥50 years (1988–2017). Using a nested case-control approach, we matched each newly developed case of AD with 40… Continue reading Clinically apparent #Helicobacter pylori infection and the risk of incident #Alzheimer’s disease: A population-based nested case-control study
Neurophysiological and behavioral synchronization in group-living and #sleeping mice
Social interactions profoundly influence animal development, physiology, and behavior. Yet, how sleep—a central behavioral and neurophysiological process—is modulated by social interactions is poorly understood. Here, we characterized sleep behavior and neurophysiology in freely moving and co-living mice under different social conditions. We utilized wireless neurophysiological devices to simultaneously record multiple individuals within a group for 24 h, alongside video acquisition. We… Continue reading Neurophysiological and behavioral synchronization in group-living and #sleeping mice
Cortical reactivations predict future sensory responses
Many theories of offline memory consolidation posit that the pattern of neurons activated during a salient sensory experience will be faithfully reactivated, thereby stabilizing the pattern1,2. However, sensory-evoked patterns are not stable but, instead, drift across repeated experiences3,4,5,6. Here, to investigate the relationship between reactivations and the drift of sensory representations, we imaged the calcium… Continue reading Cortical reactivations predict future sensory responses
NR-SAFE: a randomized, double-blind safety trial of high dose #nicotinamide riboside in #Parkinson’s disease
Nicotinamide adenine dinucleotide (NAD) replenishment therapy using nicotinamide riboside (NR) shows promise for Parkinson’s disease (PD) and other neurodegenerative disorders. However, the optimal dose of NR remains unknown, and doses exceeding 2000 mg daily have not been tested in humans. To evaluate the safety of high-dose NR therapy, we conducted a single-center, randomized, placebo-controlled, double-blind,… Continue reading NR-SAFE: a randomized, double-blind safety trial of high dose #nicotinamide riboside in #Parkinson’s disease
Simultaneous Comparisons of 25 Acute #Migraine Medications Based on 10 Million Users’ Self-Reported Records From a Smartphone Application
Many acute treatment options exist for migraine. However, large-scale, head-to-head comparisons of treatment effectiveness from real-world patient experience reports are lacking.MethodsThis is a retrospective analysis of 10,842,795 migraine attack records extracted from an e-diary smartphone application between June 30, 2014, and July 2, 2020. We analyzed 25 acute medications among seven classes- acetaminophen, NSAIDs, triptans,… Continue reading Simultaneous Comparisons of 25 Acute #Migraine Medications Based on 10 Million Users’ Self-Reported Records From a Smartphone Application
Inhibition of ALDH2 by quercetin glucuronide suggests a new hypothesis to explain red #wine #headaches
The consumption of red wine induces headaches in some subjects who can drink other alcoholic beverages without suffering. The cause for this effect has been attributed to a number of components, often the high level of phenolics in red wine, but a mechanism has been elusive. Some alcohol consumers exhibit flushing and experience headaches, and… Continue reading Inhibition of ALDH2 by quercetin glucuronide suggests a new hypothesis to explain red #wine #headaches
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