Publications by authors named "Sung-W Lee"

We introduce two Korean-named yet transcultural feelings, and , to fill gaps in neuroscientific understanding of mammalian bondedness, loss, and aggression. is a visceral sense of connectedness to a person, place, or thing that may arise after proximity, yet does not require intimacy. The brain opioid theory of social attachment (BOTSA) supports the idea that involves increased activity of enkephalins and beta-endorphins.

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This study uses machine learning and multicenter registry data for analyzing the determinants of a favorable neurological outcome in patients with out-of-hospital cardiac arrest (OHCA) and developing decision support systems for various subgroups. The data came from the Korean Cardiac Arrest Research Consortium registry, with 2679 patients who underwent OHCA aged 18 or above with the return of spontaneous circulation (ROSC). The dependent variable was a favorable neurological outcome (Cerebral Performance Category score 1-2), and 68 independent variables were included, e.

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Background/aims: Hepatocellular carcinoma (HCC) exhibits significant sex disparities in incidence, yet its molecular mechanisms remain unclear. We explored the role of telomerase reverse transcriptase (TERT) genetic alterations and hepatitis B virus (HBV) integration, both known major contributors to HCC, in sex-specific risk for HBV-related HCC.

Methods: We examined 310 HBV-related HCC tissues to investigate sex-specific TERT promoter (TERT-pro) mutations and HBV integration profiles, stratified by sex and age, and validated with single-cell RNA sequencing (scRNA-seq) data.

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Background And Objectives: The outcomes and characteristics of out-of-hospital cardiac arrest (OHCA) vary across geographic regions. The etiologies and prognoses of OHCA in Asian populations remain less established. This study aimed to investigate the etiologies and clinical characteristics of patients successfully resuscitated after OHCA and to identify predictors of survival outcomes.

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Introduction: The safety and efficacy of paroxysmal atrial fibrillation (PAF) ablation with the HELIOSTAR multielectrode radiofrequency (RF) balloon catheter have been demonstrated in European studies; data from elsewhere are lacking. This prospective, multicenter study conducted in the United States, Italy, and China investigated the safety and efficacy of pulmonary vein isolation (PVI) using HELIOSTAR in drug-refractory symptomatic PAF.

Methods: The primary effectiveness endpoint (PEE) was 12-month freedom from documented atrial fibrillation/atrial flutter/atrial tachycardia plus freedom from acute procedural failure, nonstudy catheter failure, repeat ablation failure, direct current cardioversion (DCCV), and Class I/III antiarrhythmic drug (AAD) failure.

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Introduction And Objectives: The short-term mortality of severe alcoholic hepatitis (SAH) is high, but there are no effective treatments to improve short-term mortality other than corticosteroids. This study investigated the effects of adding rifaximin to standard treatment in patients with SAH.

Material And Methods: In this randomized controlled open-label trial, patients with SAH (Maddrey's discriminant function≥32) were randomized to the rifaximin or control group.

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Article Synopsis
  • The study explored how body mass index (BMI) impacts mortality in critically ill patients with severe acute kidney injury (AKI) who required renal replacement therapy, focusing on differences between sexes.
  • The results showed that underweight and normal weight male patients had higher 90-day mortality risks compared to obese males, while no significant difference was found in females.
  • The findings suggest an "obesity paradox," where obese males had better outcomes, emphasizing the need for sex-specific assessments in critically ill patients.
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As delayed treatment of septic shock can lead to an irreversible health state, timely identification of septic shock holds immense value. While numerous approaches have been proposed to build early warning systems, these approaches primarily focus on predicting the future risk of septic shock, irrespective of its precise onset timing. Such early prediction systems without consideration of timeliness fall short in assisting clinicians in taking proactive measures.

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We have previously shown that nano-sized graphene oxide (NGO) displays anti-inflammatory activities against NKT cell-mediated sepsis. To address whether NGO could be applied to treat acute skin inflammation, we developed a conventional skin Cetaphil cream containing NGO (denoted as NGO cream) for topical application to skin lesions and investigated its therapeutic efficacy by employing the tape-stripping-induced acute skin inflammation model. Topical application of NGO cream to the wounded area significantly reduced skin lesions compared with application of the control cream.

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The SWItch3-related gene (SRG3) is a core component of ATP-dependent SWI/SNF complexes, which are crucial for regulating immune cell development and function (e.g., macrophages and CD4 T cells), embryonic development, and non-immune cell differentiation.

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Article Synopsis
  • - The study investigates the risk of hepatocellular carcinoma (HCC) in individuals with metabolic dysfunction-associated steatotic liver disease (MASLD) and a low fibrosis-4 index (FIB-4), which is used to assess liver health.
  • - Out of 613 participants diagnosed with MASLD-related HCC, 13% had a low FIB-4, with 26% among those without cirrhosis, indicating potential missed cases for further evaluation.
  • - The findings suggest that current guidelines may fail to identify over a quarter of MASLD-related HCC patients without cirrhosis who present a low FIB-4, highlighting a need for updated clinical pathways.
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  • Hyperuricemia is a key factor in gout, but the direct link between oral health and hyperuricemia was previously unclear; this study aims to explore that relationship.
  • The research analyzed data from 17,557 participants in the Korea National Health and Nutrition Examination Survey, examining factors like dental caries, tooth brushing habits, and dental check-ups.
  • Results showed that poor oral health and behaviors related to oral care were significantly associated with an increased likelihood of hyperuricemia, particularly in males, indicating a need for further investigation in this area.
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Sequencing of messenger RNA (mRNA) found in extracellular vesicles (EVs) in liquid biopsies can provide clinical information such as somatic mutations, resistance profiles and tumor recurrence. Despite this, EV mRNA remains underused due to its low abundance in liquid biopsies, and large sample volumes or specialized techniques for analysis are required. Here we introduce Self-amplified and CRISPR-aided Operation to Profile EVs (SCOPE), a platform for EV mRNA detection.

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Introduction: α-galactosylceramide (α-GalCer), a prototypical agonist of invariant natural killer T (iNKT) cells, stimulates iNKT cells to produce various cytokines such as IFNγ and IL4. Moreover, repeated α-GalCer treatment can cause protective or pathogenic outcomes in various immune-mediated diseases. However, the precise role of α-GalCer-activated iNKT cells in sepsis development remains unclear.

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Background: Targeting the tumor microenvironment represents an emerging therapeutic strategy for cancer. Macrophages are an essential part of the tumor microenvironment. Macrophage polarization is modulated by mitochondrial metabolism, including oxidative phosphorylation (OXPHOS), the tricarboxylic acid (TCA) cycle, and reactive oxygen species content.

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Article Synopsis
  • Graphene oxide (GO), known for its oxygen-containing functional groups, shows potential in biomedicine for drug delivery and tissue regeneration, with nanoscale graphene oxide (NGO) exhibiting anti-inflammatory properties.
  • In a study using a Th2-mediated skin inflammation model, NGO injection was found to reduce Th2 cell responses and inflammation in BALB/c mice sensitized with ovalbumin and aluminum hydroxide.
  • The research indicates that NGO treatment leads to improved conditions in models of atopic dermatitis (AD), suggesting a potential therapeutic role for NGO in managing allergic diseases like AD.
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Alzheimer's disease (AD) is the most common neurodegenerative disorder, and amyloid beta oligomers (AβO), which are pathological markers of AD, are known to be highly toxic. AβO increase mitochondrial dysfunction, which is accompanied by a decrease in mitochondrial fusion. Although mitofusin (Mfn) 1 and Mfn2 are mitochondrial fusion proteins, Mfn2 is known to regulate endoplasmic reticulum (ER) function, as it is located in the ER.

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Background: Invariant natural killer T (iNKT) cells play protective or pathogenic roles in a variety of immune and inflammatory diseases. However, whether iNKT cells contribute to the progression of acute neuroinflammation remains unclear. Thus, we addressed this question with a mouse model of lipopolysaccharide (LPS)-induced acute neuroinflammation.

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  • A study explored the unclear relationship between diabetes and clinical outcomes in patients with alcoholic liver cirrhosis by analyzing data from 965 patients admitted due to acute decompensation from 2015 to 2019.* -
  • Results showed that 23.6% of participants had diabetes, which correlated with increased risks for complications like hepatic encephalopathy and upper gastrointestinal bleeding. Notably, the incidence of death or liver transplantation was higher among diabetic patients.* -
  • The findings concluded that diabetes significantly increases the risk of death or liver transplantation in these patients, leading to poorer health outcomes over time.*
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Background: Although the burden of alcohol-associated hepatocellular carcinoma (HCC) is increasing with rising alcohol consumption, clinical presentation and outcomes of alcohol-associated HCC have not been systematically assessed. We aimed to determine the prevalence, clinical characteristics, surveillance rates, treatment allocation, and outcomes of alcohol-associated HCC.

Methods: Medline and Embase were searched from inception to January 2023.

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Background: This study investigated the association between serum phosphate level and mortality in acute kidney injury (AKI) patients undergoing continuous kidney replacement therapy (CKRT) and evaluated whether this association differed according to disease severity.

Methods: Data from eight tertiary hospitals in Korea were retrospectively analyzed. The patients were classified into four groups (low, normal, high, and very high) based on their serum phosphate level at baseline.

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  • The study examines how lifestyle habits, specifically diet and exercise, affect the health-related quality of life (HRQOL) in gout patients using the Gout Impact Scale (GIS).
  • Data from 232 Korean patients revealed that those who exercised more and consumed fewer soft drinks and meat reported better overall gout concerns and well-being during attacks.
  • Results indicate that increased vegetable intake and regular exercise are associated with improved HRQOL in gout patients, emphasizing the importance of lifestyle choices in managing the condition.
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This study develops machine learning-based algorithms that facilitate accurate prediction of cerebral oxygen saturation using waveform data in the near-infrared range from a multi-modal oxygen saturation sensor. Data were obtained from 150,000 observations of a popular cerebral oximeter, Masimo O3™ regional oximetry (Co., United States) and a multi-modal cerebral oximeter, Votem (Inc.

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Background: Diabetic kidney disease (DKD) stands as the predominant cause of chronic kidney disease and end-stage kidney disease. Its diverse range of manifestations complicates the treatment approach for patients. Although kidney biopsy is considered the gold standard for diagnosis, it lacks precision in predicting the progression of kidney dysfunction.

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Background And Aim: The Model for End-Stage Liver Disease (MELD) is a reliable prognostic tool for short-term outcome prediction in patients with end-stage liver disease. MELD 3.0 was introduced to enhance the predictive accuracy.

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