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| http://dx.doi.org/10.1001/jama.2015.4846 | DOI Listing |
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Peripheral contributions to resting state brain dynamics.
Nat Commun
December 2024
Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, US.
The correlational structure of brain activity dynamics in the absence of stimuli or behavior is often taken to reveal intrinsic properties of neural function. To test the limits of this assumption, we analyzed peripheral contributions to resting state activity measured by fMRI in unanesthetized, chemically immobilized male rats that emulate human neuroimaging conditions. We find that perturbation of somatosensory input channels modifies correlation strengths that relate somatosensory areas both to one another and to higher-order brain regions, despite the absence of ostensible stimuli or movements.
View Article and Find Full Text PDF3-N-Butylphthalide alleviate Aβ-induced cellular senescence through the CDK2-pRB1-Caspase3 axis.
Brain Res
December 2024
Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China. Electronic address:
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by the accumulation of amyloid-beta (Aβ) and leading to cellular senescence and cognitive deficits. Cellular senescence contributes significantly to the pathogenesis of AD through the senescence-associated secretory phenotype (SASP), exacerbating Aβ deposition. This study investigates the protective effects of 3-N-Butylphthalide (NBP), a compound derived from Apium graveolens Linn (Chinese celery), on Aβ-induced cellular senescence in U87 cells.
View Article and Find Full Text PDFAntioxidant PRDX3 gene therapy protects brain cells and prevents neurodegeneration in an animal model of Parkinson's disease.
Neuropeptides
December 2024
Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Histología, Monterrey, Nuevo León, Mexico. Electronic address:
Neurodegenerative diseases, including Parkinson's Disease (PD), are a significant global health challenge with no effective therapies to counteract neurodegeneration. Genetic and environmental factors lead to mitochondrial dysfunction and increased reactive oxygen species (ROS), resulting in oxidative stress. This stress reduces levels of Peroxiredoxin 3 (PRDX3), a key protein for maintaining ROS balance at the mitochondrial level, increasing the substantia nigra's susceptibility to damage.
View Article and Find Full Text PDFExcess Ub-K48 Induces Neuronal Apoptosis in Alzheimer's Disease.
J Integr Neurosci
December 2024
Department of Human Anatomy, School of Basic Medical Sciences, Wannan Medical College, 241002 Wuhu, Anhui, China.
Background: K48-linked ubiquitin chain (Ub-K48) is a crucial ubiquitin chain implicated in protein degradation within the ubiquitin-proteasome system. However, the precise function and molecular mechanism underlying the role of Ub-K48 in the pathogenesis of Alzheimer's disease (AD) and neuronal cell abnormalities remain unclear. The objective of this study was to examine the function of K48 ubiquitination in the etiology of AD, and its associated mechanism of neuronal apoptosis.
View Article and Find Full Text PDFCognitive abilities are associated with rapid dynamics of electrophysiological connectome states.
Netw Neurosci
December 2024
Department of Psychology, University of Illinois Urbana-Champaign, Champaign, IL, USA.
Time-varying changes in whole-brain connectivity patterns, or connectome state dynamics, hold significant implications for cognition. However, connectome dynamics at fast (>1 Hz) timescales highly relevant to cognition are poorly understood due to the dominance of inherently slow fMRI in connectome studies. Here, we investigated the behavioral significance of rapid electrophysiological connectome dynamics using source-localized EEG connectomes during resting state ( = 926, 473 females).
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