Aggregator

A relatively unknown species is producing a notorious neurotoxin, devastating sea life

Advance underscores the importance of materials science for quantum computing

Alzheimer's disease (AD), a prevalent neurodegenerative disorder, is primarily characterized by β-amyloid (Aβ) deposition. Current therapies alleviate symptoms but lack agents capable of modifying disease progression. Meanwhile, cross-regional studies indicate that AD patients exhibit disrupted gut microbiota composition, which is closely associated with cerebral molecular dysregulation. Building on this gut-brain connection, this study aimed to attenuate AD progression by targeting gut...

Diagnosing Alzheimer's disease (AD) in adults with Down syndrome (DS), a population with a high genetically determined risk of AD, remains challenging. In this large observational study including n = 2329 samples from the Down Alzheimer Barcelona Neuroimaging Initiative (DABNI) and euploid controls from the Sant Pau Initiative on Neurodegeneration (SPIN) with and without symptomatic AD, we investigate if the strong diagnostic performance of plasma p-tau217 observed in sporadic AD extends to the...

Dopamine (DA) is essential for the production of vigorous actions, but how DA modifies the gain of motor commands remains unclear. Here we show that subsecond DA transients in the striatum of mice are neither required nor sufficient for specifying the vigor of ongoing forelimb movements. Our findings have important implications for our understanding of how DA contributes to motor control under physiological conditions and in Parkinson's disease.

Alzheimer's disease (AD), a prevalent neurodegenerative disorder, is primarily characterized by β-amyloid (Aβ) deposition. Current therapies alleviate symptoms but lack agents capable of modifying disease progression. Meanwhile, cross-regional studies indicate that AD patients exhibit disrupted gut microbiota composition, which is closely associated with cerebral molecular dysregulation. Building on this gut-brain connection, this study aimed to attenuate AD progression by targeting gut...

Skeletal muscles, which constitute 40-50% of body mass, regulate whole-body energy expenditure and glucose and lipid metabolism. Peroxisomes are dynamic organelles that play a crucial role in lipid metabolism and clearance of reactive oxygen species, however their role in skeletal muscle remains poorly understood. To clarify this issue, we generated a muscle-specific transgenic mouse line with peroxisome import deficiency through the deletion of peroxisomal biogenesis factor 5 (Pex5). Here, we...

Transcription factors DAF-16/FOXO and HLH-30/TFEB have been linked to aging regulation, but how they synergize to promote longevity is not fully understood. Here, we reveal a functional interaction between these two transcription factors that supports healthier aging in Caenorhabditis elegans. Namely, DAF-16 and HLH-30 cooperate to trigger robust lysosomal tubulation under various contexts, which contributes to systemic health benefits in late age. Remarkably, lysosome tubulation can be...

Optimizing the activity and longevity of oxygen evolution reaction (OER) electrocatalysts requires an atomic-scale understanding of multiple reconstruction and transformation processes occurring in the surface and sub-surface regions of the electrocatalyst. Herein, a multimodal method combining X-ray absorption fine structure and photoemission spectroscopy, in situ Raman spectroscopy, transmission electron microscopy and atom probe tomography with electrochemical measurements is employed to...

No abstract

Aging trajectories are influenced by modifiable risk factors, and prior evidence has hinted that multilingualism may have protective potential. However, reliance on suboptimal health markers, small samples, inadequate confounder control and a focus on clinical cohorts led to mixed findings and limited applicability to healthy populations. Here, we developed biobehavioral age gaps, quantifying delayed or accelerated aging in 86,149 participants across 27 European countries. National surveys...

Gut microbes play a crucial role in modulating host lifespan. However, the microbial factors that influence host longevity and their mechanisms of action remain poorly understood. Using the expression of Caenorhabditis elegans FAT-7, a stearoyl-CoA 9-desaturase, as a proxy for lifespan modulation, we conduct a genome-wide bacterial mutant screen and identify 26 Escherichia coli mutants that enhance host lifespan. Transcriptomic and biochemical analyses reveal that these mutant diets induce...

No abstract

Metabolic rewiring helps to construct efficient microbial cell factories; however, these cells suffer from metabolic stress during long-term fed-batch fermentation. Thus, the construction of robust cells is vital for industrial application of microbial cell factories at the laboratory scale. Here, we systematically characterized longevity factors and pathways for biosynthesis of the diterpenoid sclareol and found that weakening nutrient-sensing pathways and enhancing mitophagy synergistically...

People tend to form impressions of others' trustworthiness based on their facial appearance and make trust-related decisions accordingly. In such face-based trustworthiness judgments (FBTJs), older adults are generally more likely than younger adults to attribute higher trustworthiness. This pattern is sometimes referred to as positivity bias and has been proposed as a potential risk factor for fraud victimization in later life. However, previous studies lack objective ground-truth measures of...

Culling proceeds after Canada’s Supreme Court ends heated 11-month battle over the fate of more than 300 birds