Publications by authors named "S-W Kim"

Introduction: Neck pain affects 203 million people globally and is prevalent in various settings due to factors like poor posture, lack of exercise, and occupational hazards. Therefore, addressing ergonomic issues with solutions like a wearable robotic device is crucial. This research presents a novel assistive exosuit, characterized by its slim and lightweight structure and intuitive control without the use of hands, designed to mitigate muscle fatigue in the neck and shoulders during prolonged flexed neck posture.

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Background: Dixon-based magnetic resonance imaging (MRI) intramuscular proton density fat fraction (PDFF) is a potentially useful imaging biomarker of muscle quality. However, multi-vendor, multi-site reproducibility of intramuscular PDFF quantification, required for large clinical studies, can be strongly dependent on acquisition and processing. The purpose of this study was (I) to develop a 6-point Dixon MRI-based acquisition and processing technique for reproducible multi-vendor, multi-site quantification of thigh intramuscular PDFF; and (II) to evaluate the ability of the technique to detect differences in thigh muscle status between operated .

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Background: Pulmonary vein isolation (PVI) alone is less effective in patients with persistent atrial fibrillation (AF) compared with those with paroxysmal AF. We investigate whether additional linear ablation from the superior vena cava to the right atrial septum and cavotricuspid isthmus ablation improves the rhythm outcome of patients with persistent AF undergoing cryoballoon PVI (Cryo-PVI).

Methods: In this investigator-initiated, multicenter, randomized clinical trial, 289 patients with persistent AF refractory to antiarrhythmic drug therapy were randomized 1:1 to either Cryo-PVI with additional right atrium (RA) linear ablation or Cryo-PVI alone.

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Here, we present a bioengineering approach to emulate the human bone marrow in vitro. Our developmentally inspired method uses self-organization of human hematopoietic stem and progenitor cells and vascular endothelial cells cultured in a three-dimensional microphysiological system to create vascularized, perfusable tissue constructs that resemble the hematopoietic vascular niche of the human marrow. The microengineered niche is capable of multilineage hematopoiesis and can generate functionally mature human myeloid cells that can intravasate into perfused blood vessels, providing a means to model the mobilization of innate immune cells from the marrow.

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Introduction: In the absence of a vaccination programme, the coronavirus disease 2019 (COVID-19) pandemic had substantial impacts on population health and wellbeing and health care services. We explored the association between COVID-19 status, sociodemographic, socioeconomic and clinical factors and economic costs during the second wave of the COVID-19 pandemic.

Data: The study used patient-reported digital survey and symptom surveillance data collected between July and December 2020, in collaboration with a primary care computerised medical record system supplier, EMIS Health, in the UK.

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  • Hemorrhagic transformation is a serious complication of intravenous thrombolysis (IVT) in acute ischemic stroke, and this study aimed to understand its impact on clinical outcomes by evaluating different hemorrhage patterns.
  • The research analyzed data from the Enhanced Control of Hypertension and Thrombolysis Stroke Study and defined symptomatic intracerebral hemorrhage (sICH) and asymptomatic intracerebral hemorrhage (aICH) based on established criteria, examining their associations with patient outcomes.
  • Results showed that 17.8% of participants experienced intracranial hemorrhage, with sICH significantly linked to worse outcomes, including death and major disability, while aICH also posed risks, though to a lesser extent.
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  • - The immune system relies on both innate and adaptive responses to fight pathogens, and individuals with weakened immune systems require effective methods to enhance their immune function.
  • - This study investigates the effects of the probiotic OTG1204 on macrophages, crucial for immune defense, specifically examining its potential to stimulate the immune response in conditions of immunosuppression induced by cyclophosphamide (CTX).
  • - Results showed that OTG1204 activated macrophages, increasing important signaling molecules and cytokines through specific pathways, and helped restore immune function in immunosuppressed mice by improving immune cell populations and overall health indicators.
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Background: Electrohydraulic shockwave devices have been Food and Drug Administration-cleared for improved blood flow and connective tissue activation and have been used to treat erectile dysfunction (ED). In this study, the main focus was to evaluate improvement in erectile tissue quality after low intensity shockwave therapy (LiSWT).

Methods: A single-blind, sham-controlled, randomized, prospective study, was performed in men with ED naïve to shockwave or radial ballistic pressure wave therapy.

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Background: Hypertrophic cardiomyopathy (HCM) is a heterogeneous condition that can lead to atrial fibrillation, heart failure, and sudden cardiac death in many individuals but mild clinical impact in others. The mechanisms underlying this phenotypic heterogeneity are not well defined. The aim of this study was to use plasma proteomic profiling to help illuminate biomarkers that reflect or inform the heterogeneity observed in HCM.

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  • Leucine-rich repeat kinase 2 (LRRK2) and α-synuclein play significant roles in the development of Parkinson's disease, particularly through their impact on neuroinflammation and oxidative stress.
  • In this study, a marine algal extract was found to inhibit LRRK2 activity, reduce inflammatory responses in microglial cells, and prevent α-synuclein fibril formation related to Parkinson's pathology.
  • The extract also enhanced lysosomal function in human dopaminergic neurons and slightly improved cell survival in a model of oxidative stress induced by rotenone.
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Muscle atrophy detrimentally impacts health and exacerbates physical disability, leading to increased mortality. In particular, sarcopenia, aging-related degenerative muscle loss, necessitates urgent remedies. Current approaches for treating muscle atrophy include exercise and nutrition, while drug exploration remains in its early stages.

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Background: Current guidelines recommend intervention for asymptomatic rheumatic mitral stenosis (MS) with mitral valve area ≤1.5 cm based on indicators including pulmonary arterial systolic pressure (PASP) >50 mm Hg and new-onset atrial fibrillation; however, evidence supporting this is lacking.

Methods: This single-center retrospective study included patients with rheumatic MS between 2006 and 2022.

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(1) Background: Female sexual dysfunction (FSD) and overactive bladder (OAB) are prevalent disorders that significantly impair women's quality of life. While pelvic floor muscle training (PFMT) is a well-established treatment for OAB, its effectiveness for FSD remains uncertain. Recent studies suggest that intravaginal electrical stimulation (IVES) may enhance the effects of PFMT.

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Background: Sacubitril/valsartan, an angiotensin receptor-neprilysin inhibitor (ARNI), is an established treatment for heart failure (HF) with reduced left ventricular ejection fraction. It has not been rigorously compared with angiotensin-converting enzyme inhibitors in children. PANORAMA-HF (Prospective Trial to Assess the Angiotensin Receptor Blocker Neprilysin Inhibitor LCZ696 Versus Angiotensin-Converting Enzyme Inhibitor for the Medical Treatment of Pediatric HF) is a randomized, double-blind trial that evaluated the pharmacokinetics and pharmacodynamics (PK/PD), safety, and efficacy of sacubitril/valsartan versus enalapril in children 1 month to <18 years of age with HF attributable to systemic left ventricular systolic dysfunction (LVSD).

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Inflammasome activation is implicated in diseases of aberrant angiogenesis such as age-related macular degeneration (AMD), though its precise role in choroidal neovascularization (CNV), a characteristic pathology of advanced AMD, is ill-defined. Reports on inhibition of inflammasome constituents on CNV are variable and the precise role of inflammasome in mediating pathological angiogenesis is unclear. Historically, subretinal injection of inflammasome agonists alone has been used to investigate retinal pigmented epithelium (RPE) degeneration, while the laser photocoagulation model has been used to study pathological angiogenesis in a model of CNV.

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The article "Influence of 12 weeks of basketball training on college students' heart function" by Z.-T. Yang, S.

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  • - The study aimed to create and validate a prognostic model for assessing the risk of hepatocellular carcinoma (HCC) in noncirrhotic adults with chronic hepatitis B, focusing on those without significant alanine aminotransferase (ALT) elevation.
  • - Researchers analyzed data from over 13,000 patients across several cohorts in Taiwan, Korea, and Hong Kong, finding that baseline HBV DNA levels were key predictors of HCC risk, especially at moderate viral loads.
  • - The new model, called Revised REACH-B, showed strong predictive accuracy and was more beneficial compared to other strategies in predicting HCC risk, though its applicability to other racial groups remains a limitation.
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Background: Commercial genome-wide genotyping arrays have historically neglected coverage of genetic variation across populations.

Objective: We aimed to create a multi-ancestry genome-wide array that would include a wide range of neuro-specific genetic content to facilitate genetic research in neurological disorders across multiple ancestral groups, fostering diversity and inclusivity in research studies.

Methods: We developed the Illumina NeuroBooster Array (NBA), a custom high-throughput and cost-effective platform on a backbone of 1,914,934 variants from the Infinium Global Diversity Array and added custom content comprising 95,273 variants associated with more than 70 neurological conditions or traits, and we further tested its performance on more than 2000 patient samples.

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Functional variations in coding and noncoding RNAs are crucial in tumorigenesis, with cancer-specific alterations often resulting from chemical modifications and posttranscriptional processes mediated by enzymes. These RNA variations have been linked to tumor cell proliferation, growth, metastasis, and drug resistance and are valuable for identifying diagnostic or prognostic cancer biomarkers. The diversity of posttranscriptional RNA modifications, such as splicing, polyadenylation, methylation, and editing, is particularly significant due to their prevalence and impact on cancer progression.

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The kidney tubules constitute two-thirds of the cells of the kidney and account for the majority of the organ's metabolic energy expenditure. Acute tubular injury (ATI) is observed across various types of kidney diseases and may significantly contribute to progression to kidney failure. Non-invasive biomarkers of ATI may allow for early detection and drug development.

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Purpose: This study aimed to assess the risk of ocular adverse events, including retinal artery occlusion (RAO), retinal vein occlusion (RVO), noninfectious uveitis (NIU), noninfectious scleritis (NIS), optic neuritis (ON), ischemic optic neuropathy (ION), and ocular motor cranial nerve palsy (OMCNP), following Coronavirus Disease 2019 (COVID-19) vaccination.

Design: Population-based self-controlled case series METHODS: This study utilized nationwide claims and vaccination data provided by the Korea National Health Insurance Service and Korea Disease Control and Prevention Agency. From the entire South Korean population of 52 million individuals, patients with incident RAO, RVO, anterior NIU, nonanterior NIU, NIS, ON, ION, or OMCNP between January 2021 and March 2022 were included.

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  • FGFR genomic alterations are found in 5-10% of human cancers, and erdafitinib has shown promise in treating various advanced solid tumors but its effectiveness in Asian patients was unclear.
  • A phase IIa study was conducted to assess the efficacy of erdafitinib in Asian patients with FGFR-altered advanced cholangiocarcinoma, non-small cell lung cancer (NSCLC), and esophageal cancer by evaluating various response rates and survival metrics.
  • Results indicated a 40.9% objective response rate in cholangiocarcinoma patients, while NSCLC did not show any objective responses; however, all patients experienced adverse effects, highlighting the need for further safety assessment.
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  • A study examined the safety and effectiveness of one-month dual antiplatelet therapy (DAPT) in high bleeding risk patients undergoing PCI with Resolute Onyx stents, focusing on differences between Asian and non-Asian patients.
  • The results showed no significant differences in serious ischemic outcomes (like cardiac death or heart attacks) between matched groups from both regions, each with 12% incidence.
  • However, Asian patients experienced significantly fewer major bleeding events (4%) compared to non-Asian patients (9%), despite similar initial bleeding risk profiles after matching.
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Purpose: Homozygous hypomorphic variants of the RP1 gene, including c.5797C>T, p.Arg1933Ter, have traditionally been considered non-pathogenic.

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Aims: Recently, deep learning artificial intelligence (AI) models have been trained to detect cardiovascular conditions, including hypertrophic cardiomyopathy (HCM), from the 12-lead electrocardiogram (ECG). In this external validation study, we sought to assess the performance of an AI-ECG algorithm for detecting HCM in diverse international cohorts.

Methods And Results: A convolutional neural network-based AI-ECG algorithm was developed previously in a single-centre North American HCM cohort (Mayo Clinic).

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