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Navigation strategies predict spatial memory and hippocampal recruitment

14 hours 58 minutes ago
Navigation in the real world may rely on a multitude of strategies with distinct advantages and disadvantages; however, the characterization of spontaneous strategy use is scarce. We explore data across three groups engaged in virtual navigation: patients with epilepsy undergoing invasive electrophysiological recordings, two groups undergoing fMRI scanning: young adults at genetic risk for Alzheimer's disease (APOE-ε4 carriers), and healthy controls. We establish metrics to quantitatively...
E Zita Patai

DDX39A unwinds viral RNA G-quadruplexes to limit α-Synuclein amyloidogenesis

14 hours 58 minutes ago
Amyloid aggregates of α-Synuclein are hallmarks of Parkinson's disease (PD) and related neurodegenerative disorders. Literature suggests that mRNA G-quadruplexes (rG4s) bind to α-Synuclein, facilitating its amyloidogenesis. In parallel, α-Synuclein interacts with RNA-binding proteins (RBPs) within cytosolic RNA-protein granules to modulate mRNA stability. However, mechanisms by which α-Synuclein-interacting RBPs regulate its amyloidogenesis remain unexplored. Here, we report that rG4-dependent...
Aanchal Jain

Turnera diffusa polysaccharides promote healthy aging through conserved stress response regulation and metabolic remodeling across multiple aging models

14 hours 58 minutes ago
Aging is a progressive decline in physiological functions and the capacity to maintain homeostasis, representing a major risk factor for numerous chronic diseases. Geroprotectors, defined as natural or synthetic compounds capable of improving healthspan and delaying age-associated functional decline, have attracted increasing attention in aging research. However, clinically validated interventions for promoting healthy aging remain unavailable. Plant-derived polysaccharides, owing to their...
Hailing Wang

Erigeron breviscapus alleviates senescence via AMPK-SIRT1 signaling by modulating FOXO3a-mediated antioxidant defense and p53-dependent apoptosis

14 hours 58 minutes ago
Erigeron breviscapus Hand-Mazz. (EBHM) is a well-documented herbal medicine with recognized antioxidant, anti-apoptotic, and anti-inflammatory bioactivities. However, its anti-senescence effects and the underlying mechanisms remain poorly understood. Here, we investigated the anti-senescence potential of EBHM employing Caenorhabditis elegans and SAMP8 mice. In C. elegans, EBHM treatment prolonged the average lifespan of C. elegans to a maximum of 18.68%, while also significantly enhancing stress...
Yuanzhu Pu

Gait characteristics in older adults using the ProtoKinetics Zeno walkway: the atherosclerosis risk in communities (ARIC) study

14 hours 58 minutes ago
CONCLUSION: Gait mat and stopwatch measurements showed acceptable agreement, supporting clinical use. However, greater disagreement at faster speeds suggests gait mats may be more appropriate for faster walking speeds. These findings support future investigations of ST and DT gait performance within ARIC and other aging cohorts, including relationships with cognitive decline, mobility limitations, and adverse health outcomes.
Katherine J Hunzinger

A Crosswalk of the IQCODE and AD8 Proxy Dementia Screening Tools

14 hours 58 minutes ago
INTRODUCTION: Since many hospitalized older adults have delirium, assessment of baseline cognitive function often requires proxy-based measures. While the 16-item Informant Questionnaire on Cognitive Decline in Elderly (IQCODE) specifies cutoff scores for mild cognitive impairment (MCI) and dementia, the 8-item Informant Interview to Differentiate Aging and Dementia (AD8) provides only a single cutoff for "cognitive impairment," limiting its usefulness and precision. Our aim was to develop a...
Priyanka Shrestha