9,274 results match your criteria: "Section of Neurobiology; The University of Texas at Austin; Austin[Affiliation]"

X-chromosome-wide association study for Alzheimer's disease.

Mol Psychiatry

December 2024

Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, LabEx DISTALZ - U1167-RID-AGE Facteurs de Risque et Déterminants Moléculaires des Maladies Liées au Vieillissement, Lille, France.

Article Synopsis
  • A study was conducted to investigate the X-chromosome's role in Alzheimer's Disease (AD), which had been overlooked in previous genome-wide association studies.
  • The research included 115,841 AD cases and 613,671 controls, considering different X-chromosome inactivation (XCI) states in females.
  • While no strong genetic risk factors for AD were found on the X-chromosome, seven significant loci were identified, suggesting areas for future research.
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Background: Using [F]altanserin, a serotonin 2A receptor (5-HTR) antagonist Positron Emission Tomography (PET) tracer, a positive association between cortical 5-HTR binding and the inward-directed facets of neuroticism has been demonstrated in healthy individuals. Psilocybin, a 5-HTR agonist, shows promise for the treatment of depression, reducing neuroticism and mood symptoms potentially via hypothalamic-pituitary-adrenal (HPA) modulation. 5-HTR and neuroticism are both modulated by HPA axis function.

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Article Synopsis
  • ARFID is a newly recognized eating disorder characterized by a lack of interest in food, with limited research on its neurobiological aspects.
  • A study involving 1,977 ten-year-olds used the ARFID Index to compare children with ARFID symptoms to those without, analyzing their brain structures through MRI scans.
  • Results showed that children with ARFID symptoms had significantly thicker frontal cortical areas, indicating that executive function may play a role in the disorder's development.
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Beta-catenin is essential for diverse biological processes, such as body axis determination and cell differentiation, during metazoan embryonic development. Beta-catenin is thought to exert such functions through complexes formed with various proteins. Although β-catenin complex proteins have been identified in several bilaterians, little is known about the structural and functional properties of β-catenin complexes in early metazoan evolution.

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Introduction: The aim of this prospective cohort study was to investigate the associations between changes in cardiorespiratory fitness (CRF) and the risk of colorectal and prostate cancer in men.

Methods: Data from men who completed a health assessment both in military conscription in youth and an occupational health profile assessment (HPA) later in life were used. CRF was assessed as estimated V̇O, using a cycle ergometer fitness test at both time points.

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Changes in hippocampal volume, 5-HT receptor binding, and verbal memory over the course of antidepressant treatment in major depressive disorder.

J Psychiatr Res

January 2025

Neurobiology Research Unit and BrainDrugs, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Mental Health Center Copenhagen, Copenhagen University Hospital - Mental Health Services CPH, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.

Article Synopsis
  • - Serotonin reuptake inhibitors may help boost memory and increase hippocampal volume in patients with Major Depressive Disorder (MDD), particularly through the involvement of the 5-HT4 receptor. - In a study with 91 patients, significant reductions in hippocampal volume were observed after 8 weeks of treatment, especially in those responding well to the antidepressant escitalopram. - The research indicated a negative relationship between 5-HT4 receptor binding and hippocampal volume in females, suggesting a complex interaction that needs further exploration to understand its impact on memory and brain plasticity in MDD.
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Comorbidity patterns and the risk of injurious falls in older people with atrial fibrillation: Findings from a Swedish nation-wide population-based study.

Eur J Intern Med

November 2024

Aging Research Center, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet-Stockholm University, Solna, Sweden; Stockholm Gerontology Research Center, Stockholm, Sweden.

Background: Atrial fibrillation (AF) is associated with an increased fall risk, partly due to AF-related comorbidities. We investigated the impact of different comorbidity patterns on fall risk in older adults with AF.

Methods: Using the Swedish National Patient Register, we identified 203,042 adults (45 % females) with AF and at least one comorbidity, aged 65 years or older, on 01/01/2017.

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Different types of deposits comprised of amyloid-β (Aβ) peptides are one of the pathological hallmarks of Alzheimer's disease (AD) and novel methods that enable identification of a diversity of Aβ deposits during the AD continuum are essential for understanding the role of these aggregates during the pathogenesis. Herein, different combinations of five fluorescent thiophene-based ligands were used for detection of Aβ deposits in brain tissue sections from transgenic mouse models with aggregated Aβ pathology, as well as brain tissue sections from patients affected by sporadic or dominantly inherited AD. When analyzing the sections with fluorescence microscopy, distinct ligand staining patterns related to the transgenic mouse model or to the age of the mice were observed.

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Predictors of outcome in patients with cerebral palsy following selective dorsal rhizotomy.

Early Hum Dev

January 2025

Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center for Chronically Sick Children, Augustenburger Platz 1, 13353 Berlin, Germany.

Background: To identify outcome predictors of selective dorsal rhizotomy (SDR) in children with spastic cerebral palsy (CP) using logistic regression models.

Methods: A retrospective single-center study was conducted on children with spastic CP who had undergone SDR. Two outcomes were defined, one representing children not improving in motor function and spasticity and one representing children improving in motor function two years after surgery.

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Glucokinase (GK) catalyses the key regulatory step in glucose-stimulated insulin secretion. Correspondingly, hetero- and homozygous mutations in human cause maturity-onset diabetes of the young (GCK-MODY) and permanent neonatal diabetes (PNDM), respectively. To explore the possible utility of glucokinase activators (GKA) and of glucagon-like receptor-1 (GLP-1) agonists in these diseases, we have developed a novel hypomorphic allele in mice encoding an aberrantly spliced mRNA deleted for exons 2 and 3.

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Aquaporin-1 (AQP1) is a highly conserved water-channel protein, found to be expressed by astrocytes in adult humans and non-human primates (NHPs). Upregulation of cortical AQP1 expression occurs with cancer, injury, and neurodegenerative disease, but minimal information is available about the effects of normative aging on AQP1 expression. This study leverages tissues from the oldest-old rhesus macaques, some greater than 40 years of age, from the National Institute on Aging longitudinal study of caloric restriction (CR).

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Pigeon pea ( (L.) Millsp.) is a traditional Chinese medicinal plant widely utilized in folk medicine due to its significant pharmacological and nutritional properties.

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Article Synopsis
  • * A study on mice with reduced mitochondrial superoxide dismutase (SOD2) showed that a lack of this enzyme led to increased muscle glycogen and motor dysfunction, indicating a link between mitochondrial health and muscle performance.
  • * The research found that the enzyme responsible for breaking down glycogen (GP-M) was less active in these mice and could be restored by antioxidants, suggesting that maintaining mitochondrial redox balance is crucial for proper glycogen metabolism and muscle function.
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The gustatory system allows animals to assess the nutritive value and safety of foods prior to ingestion. The first step in gustation is the interaction of taste stimuli with one or more specific sensory receptors, that are generally believed to be present on the apical surface of the taste receptor cells. However, this assertion is rarely tested.

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The External Globus Pallidus as the Hub of the Auditory Cortico-Basal Ganglia Loop.

eNeuro

November 2024

Department of Sensory and Cognitive Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 860-8556, Japan.

Article Synopsis
  • The cortico-basal ganglia loop has been traditionally seen as three separate networks: motor, limbic, and associative, but this view doesn’t fully capture its complexity, especially in sensory processing like hearing.
  • Recent research demonstrates an auditory-specific loop within this system using transgenic mice, identifying the caudal external globus pallidus (GPe) as a key output node.
  • GABAergic neurons in the caudal GPe are crucial as they connect to various brain regions, suggesting these circuits could be important for triggering defensive responses to sounds.
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Rigidified nucleoside derivatives with (N)-methanocarba replacement of ribose have been repurposed as peripheral subtype-selective 5-HT serotonin receptor antagonists for heart and lung fibrosis and intestinal/vascular conditions. 4'-Cyano derivative (MRS8209; , 4.27 nM) was 47-fold (human binding, but not rat and mouse) and 724-fold (functionally) selective at 5-HTR, compared to antitarget 5-HTR, and predicted to form a stable receptor complex using docking and molecular dynamics.

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Computerized decision support to optimally funnel patients through the diagnostic pathway for dementia.

Alzheimers Res Ther

November 2024

Alzheimer Center Amsterdam and Department of Neurology, VU University Medical Center, Amsterdam UMC, De Boelelaan 1118, Amsterdam, 1081 HZ, The Netherlands.

Background: The increasing prevalence of dementia and the introduction of disease-modifying therapies (DMTs) highlight the need for efficient diagnostic pathways in memory clinics. We present a data-driven approach to efficiently guide stepwise diagnostic testing for three clinical scenarios: 1) syndrome diagnosis, 2) etiological diagnosis, and 3) eligibility for DMT.

Methods: We used data from two memory clinic cohorts (ADC, PredictND), including 504 patients with dementia (302 Alzheimer's disease, 107 frontotemporal dementia, 35 vascular dementia, 60 dementia with Lewy bodies), 191 patients with mild cognitive impairment, and 188 cognitively normal controls (CN).

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Spatial mapping of Alzheimer's disease across genetic subtypes.

Nat Genet

December 2024

Department of Biomedical Sciences, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.

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Introduction: Both micro- and macrostructural white matter (WM) abnormalities, particularly those related to axonal degeneration, are associated with cognitive decline in adults with Down syndrome (DS) prior to a diagnosis of Alzheimer disease. Neurofilament light chain (NfL) is a support protein within myelinated axons released into blood following axonal damage. In this study we investigated cross-sectional relationships between WM microstructural changes as measured by diffusion tensor imaging (DTI) and plasma NfL concentration in adults with DS without dementia.

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Brain organoid models for studying the function of iPSC-derived microglia in neurodegeneration and brain tumours.

Neurobiol Dis

December 2024

Faculty of Science and Engineering, Department of Molecular Pharmacology, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, 9713 AV Groningen, The Netherlands; Department Pathology and Medical biology, Faculty of Medical Sciences, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands. Electronic address:

Article Synopsis
  • Microglia are the brain's key immune cells, interacting with neurons and other glial cells, crucial for maintaining brain function, and their disruption can lead to neurodegenerative diseases like Alzheimer's and Parkinson's.
  • Access to actual human brain tissue is limited, making it challenging to study microglia's role in disease; however, advancements in pluripotent stem cell technology have allowed researchers to create complex models for this purpose.
  • Recent developments in brain organoids, which simulate the brain's 3D environment and cellular interactions, are providing new insights into microglial functioning and their potential to investigate various brain pathologies.
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Background: The effectiveness of using a balloon guide catheter during endovascular thrombectomy in patients with acute ischaemic stroke due to large vessel occlusion of the anterior circulation remains uncertain. We aimed to assess the effectiveness and safety of using a balloon guide catheter during endovascular thrombectomy, compared with using a conventional guide catheter, in this patient population.

Methods: We conducted a multicentre, open-label, blinded-endpoint, randomised controlled trial at 28 hospitals in China.

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Background: The Finnish Geriatric Intervention Study to Prevent Cognitive Impairment and Disability (FINGER) multimodal lifestyle intervention yielded cognitive and other health benefits in older adults at risk of cognitive decline. The two-year multinational randomized controlled LETHE trial evaluates the feasibility of a digitally supported, adapted FINGER intervention among at-risk older adults. Technology is used to complement in-person activities, streamline the intervention delivery, personalize recommendations, and collect digital biomarkers.

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