The Influence of Metabolic Dysfunction-Associated Steatotic Liver Disease and Body Mass Index on the Incidence of Alzheimer Disease: A Nationwide Cohort Study.

Background/aims: This study aimed to investigate the influence of metabolic dysfunction-associated steatotic liver disease (MASLD) and body mass index (BMI) on the incidence of Alzheimer disease (AD) in the general South Korean population.

Methods: The National Screening Program for Transitional Ages collected data from 66-year-old dementia-free Koreans in 2010 and 2011. MASLD was diagnosed based on the fatty liver index (≥30) and the presence of metabolic components, and overweight/obese status was defined as a BMI ≥23 kg/m.

Body mass index, metabolically abnormal status, and incident Parkinson's disease: Data from the UK Biobank.

BackgroundThe association between body mass index (BMI), metabolic conditions, and incident Parkinson's disease (PD) is quite complex.ObjectiveTo investigate the relationship between these variables, particularly the impact of metabolically healthy overweight/obese on the risk of PD, in the general population.MethodsA total of 402,059 participants from the UK Biobank were categorized into four phenotypes according to the presence of overweight/obesity and/or metabolically abnormal status: overweight/obesity was defined as BMI ≥25 kg/m; metabolically abnormal status was defined as having one or more metabolic risk factors including elevated blood pressure, fasting glucose, or triglyceride level, or reduced high-density lipoprotein cholesterol level.

Association between osteoporosis and risk of dementia: a Korean women nationwide population-based cohort study.

Unlabelled: Brief rationale: dementia and osteoporosis share risk factors and are rising in aging populations.

Main Results: osteoporosis significantly increases the risk of all-cause dementia, Alzheimer's disease dementia, and vascular dementia in Korean older women. Significance of the paper: early detection and treatment of osteoporosis may reduce dementia risk.

Association of Striatal Dopaminergic Depletion and Cerebral Perfusion With Cognition in Brain-First and Body-First Parkinson's Disease.

Purpose: We aimed to investigate whether the patterns of striatal subregional dopamine loss and cerebral perfusion alterations differed between the 2 types of Parkinson's disease (PD) (ie, brain-first and body-first PD) and had an impact on cognitive prognosis in PD.

Patients And Methods: This retrospective study reviewed the data of newly diagnosed patients with PD who underwent dual-phase dopamine transporter (DAT) scans in tertiary medical centers. We classified the patients into 2 groups based on the rapid eye movement sleep behavior disorder (RBD) screening questionnaire: PD with RBD (body-first PD) and PD without RBD (brain-first PD) groups.

Serial Assessment of Gait Changes After Interventions Using Smart Insole in a Patient With iNPH: A Proof-of-Concept Case Report.

Improvement in gait after a cerebrospinal fluid (CSF) tap test is a key indicator for shunt surgery in idiopathic normal pressure hydrocephalus (iNPH) patients. However, quantitative analysis of gait requires sophisticated equipment and specialists that limit practical use. Development of Bluetooth-connected sensors offers affordable way to assess gait.

Effect of the Yon PD App on the Management of Self-Care in People With Parkinson Disease: Randomized Controlled Trial.

Background: As the percentage of the older population increases, it is accompanied by an increase in the prevalence of Parkinson disease (PD). People with PD experience a range of nonmotor symptoms, including pain, constipation, dysphagia, sleep disturbances, and fatigue. Improving self-care is necessary for people with PD because it is a chronic disease that requires lifelong management.

Is motor reserve associated with a rapid progression of Parkinson disease?

BackgroundThe motor reserve estimates (MRes) derived from a residual approach correlate with motor severity in Parkinson's disease (PD), leaving the independent effect of motor reserve on clinical outcomes unclear.ObjectiveInvestigate the independent influence of motor reserve on the long-term outcome.MethodsUsing the Parkinson's Progression Markers Initiative (PPMI) and Pusan National University Hospital (PNUH) datasets, we investigated the association of MRes with progression of motor severity as well as risk of phenoconversion to Hoehn & Yahr (H&Y) stage 3.

Distinguishing Pathologic Gait in Older Adults Using Instrumented Insoles and Deep Neural Networks.

Gait abnormalities are common in the older population owing to aging- and disease-related changes in physical and neurological functions. Differentiating the causes of gait abnormalities is challenging because various abnormal gaits share a similar pattern in older patients. Herein, we propose a deep neural network (DNN) model to classify disease-specific gait patterns in older adults using commercialized instrumented insoles.

Occipital hypoperfusion and motor reserve in Parkinson's disease: an early-phase F-FP-CIT PET study.

Individual variability exists in parkinsonian motor symptoms despite a similar degree of nigrostriatal dopamine depletion in Parkinson's disease (PD), called motor reserve. We enrolled 397 patients newly diagnosed with PD who underwent dual-phase F-FP-CIT PET upon initial assessment. Individual motor reserve was estimated based on initial parkinsonian motor symptoms and striatal dopamine transporter availability using a residual model.

Evidence-Based Review on Symptomatic Management of Huntington's Disease.

Huntington's disease (HD) is a neurodegenerative disorder characterized by motor, behavioral, and cognitive impairments and significant impacts on patient quality of life. This evidence-based review, conducted by the Korean Huntington Disease Society task force, systematically examines current pharmacological and nonpharmacological interventions for symptomatic management of HD. Following PRISMA guidelines, databases were searched for studies up to August 2022 that focused on 23 symptoms across four domains: motor, neuropsychological, cognition, and others.

Association between striatal amyloid deposition and motor prognosis in Parkinson's disease.

Background And Purpose: The co-occurrence of amyloid-β pathology in Parkinson's disease (PD) is common; however, the role of amyloid-β deposition in motor prognosis remains elusive. This study aimed to investigate the association between striatal amyloid deposition, motor complications and motor prognosis in patients with PD.

Methods: Ninety-six patients with PD who underwent F florbetaben (FBB) positron emission tomography were retrospectively assessed.

Regional Burden of Enlarged Perivascular Spaces and Cognition and Neuropsychiatric Symptoms in Drug-Naive Patients With Parkinson Disease.

Background And Objectives: Although the potential role of enlarged perivascular spaces (EPVSs) in Parkinson disease (PD) is increasingly recognized, whether EPVSs located in different anatomical regions exert differential effects on clinical manifestation remains uncertain. We investigated the regional EPVS burden and its association with cognition and neuropsychiatric symptoms (NPSs) in newly diagnosed PD population.

Methods: In this retrospective, cross-sectional study, EPVS in the temporal lobe (T-EPVS), centrum semiovale (CS-EPVS), and basal ganglia (BG-EPVS) were visually rated in drug-naive patients with PD who underwent magnetic resonance imaging, dopamine transporter (DAT) scans, neuropsychological assessments, and Neuropsychiatric Inventory Questionnaire at baseline.

CSF pulsations measured in Parkinson's disease patients using EPI-based fMRI data.

Introduction: Cerebrospinal fluid (CSF) flow is involved in brain waste clearance and may be impaired in neurodegenerative diseases such as Parkinson's disease. This study aims to investigate the relationship between the CSF pulsation and the development of dementia in Parkinson's disease (PD) patients using EPI-based fMRI.

Methods: We measured CSF pulsation in the 4th ventricle of 17 healthy controls and 35 PD patients using a novel CSF pulsation index termed "CSFpulse" based on echo-planar imaging (EPI)-based fMRI.

Hypoperfusion in Alzheimer's Disease-Prone Regions and Dementia Conversion in Parkinson's Disease.

Purpose Of The Report: Although early detection of individuals at risk of dementia conversion is important in patients with Parkinson's disease (PD), there is still no consensus on neuroimaging biomarkers for predicting future cognitive decline. We aimed to investigate whether cerebral perfusion patterns on early-phase 18 F-N-(3-fluoropropyl)-2β-carboxymethoxy-3β-(4-iodophenyl) nortropane ( 18 F-FP-CIT) PET have the potential to serve as a neuroimaging predictor for early dementia conversion in patients with PD.

Materials And Methods: In this retrospective analysis, we enrolled 187 patients with newly diagnosed PD who underwent dual-phase 18 F-FP-CIT PET at initial assessment and serial cognitive assessments during the follow-up period (>5 years).

Patterns of regional cerebral hypoperfusion in early Parkinson's disease: Clinical implications.

Introduction: This study aimed to investigate whether regional cerebral perfusion patterns on early-phase F-FP-CIT PET scans, which is typically coupled to cerebral metabolism, predict the long-term prognosis of Parkinson's disease (PD).

Methods: We enrolled 397 drug-naïve patients with early-stage PD who underwent dual-phase F-FP-CIT PET scans. After quantifying the early-phase F-FP-CIT PET images, cluster analysis was performed to delineate the PD subtypes according to the patterns of regional cerebral perfusion.

Comparing Montreal Cognitive Assessment Performance in Parkinson's Disease Patients: Age- and Education-Adjusted Cutoffs vs. Machine Learning.

Objective: The Montreal Cognitive Assessment (MoCA) is recommended for general cognitive evaluation in Parkinson's disease (PD) patients. However, age- and education-adjusted cutoffs specifically for PD have not been developed or systematically validated across PD cohorts with diverse education levels.

Methods: In this retrospective analysis, we utilized data from 1,293 Korean patients with PD whose cognitive diagnoses were determined through comprehensive neuropsychological assessments.

Choroid Plexus Volume, Amyloid Burden, and Cognition in the Alzheimer's Disease Continuum.

As a part of the glymphatic system, the choroid plexus (CP) is involved in the clearance of harmful metabolites from the brain. We investigated the association between CP volume (CPV), amyloid-β (Aβ) burden, and cognition in patients on the Alzheimer's disease (AD) continuum. We retrospectively reviewed the records of 203 patients on the AD continuum and 82 healthy controls who underwent brain magnetic resonance imaging and F-florbetaben positron emission tomography.

Differential effects of cholesterol levels on cognition according to body mass index in Parkinson's disease.

Background: Cholesterol is an essential component of the neuronal cell membrane and is crucial for neuronal function; however, the role of cholesterol levels in Parkinson's disease (PD) is debatable. This study investigated the complex relationship between total cholesterol (TC) levels, body mass index (BMI), and cognition in patients with PD.

Methods: This study included 321 drug-naïve patients with PD who underwent dopamine transporter (DAT) imaging and baseline neuropsychological tests.

Different effect of hypo- and hypermetabolism on cognition in dementia with Lewy bodies: are they coupled or independent?

Patients with dementia with Lewy bodies (DLB) show widespread brain metabolic changes. This study investigated whether brain hypo- and hypermetabolism in DLB have differential effects on cognition. We enrolled 55 patients with DLB (15 prodromal DLB [MCI-LB] and 40 probable DLB) and 13 healthy controls who underwent F-fluorodeoxyglucose positron emission tomography and detailed neuropsychological tests.

Functional Brain Networks of Minor and Well-Structured Major Hallucinations in Parkinson's Disease.

Background: Minor hallucinations (mHs) and well-structured major hallucinations (MHs) are common symptoms of Parkinson's disease (PD) psychosis.

Objectives: To investigate the resting-state networks (RSNs) in patients with PD without hallucinations (PD-nH), with mH (PD-mH), and with MH (PD-MH).

Methods: A total of 73 patients with PD were enrolled (27 PD-nH, 23 PD-mH, and 23 PD-MH).

Hippocampal Perfusion Affects Motor and Cognitive Functions in Parkinson Disease: An Early Phase F-FP-CIT Positron Emission Tomography Study.

Objective: We investigated whether hippocampal perfusion changes are associated with cognitive decline, motor deficits, and the risk of dementia conversion in patients with Parkinson disease (PD).

Methods: We recruited patients with newly diagnosed and nonmedicated PD and healthy participants who underwent dual phase F-N-(3-fluoropropyl)-2β-carboxymethoxy-3β-(4-iodophenyl) nortropane positron emission tomography scans. Patients were classified into 3 groups according to hippocampal perfusion measured by standard uptake value ratios (SUVRs): (1) PD hippocampal hypoperfusion group (1 standard deviation [SD] below the mean hippocampal SUVR of healthy controls; PD-hippo-hypo), (2) PD hippocampal hyperperfusion group (1 SD above the mean; PD-hippo-hyper), and (3) the remaining patients (PD-hippo-normal).

A selective ER-phagy exerts neuroprotective effects via modulation of α-synuclein clearance in parkinsonian models.

The endoplasmic reticulum (ER) is selectively degraded by ER-phagy to maintain cell homeostasis. α-synuclein accumulates in the ER, causing ER stress that contributes to neurodegeneration in Parkinson's disease (PD), but the role of ER-phagy in α-synuclein modulation is largely unknown. Here, we investigated the mechanisms by which ER-phagy selectively recognizes α-synuclein for degradation in the ER.