Publications by authors named "Seung Hwan Lee"

Carbon dot-based nanozymes have gained significant attention, but their application in dye degradation remains limited due to low activity and challenges in recovery and reuse. To overcome these limitations, high peroxidase-active Co-doped carbon dots (CoCDs) with surface amines were synthesized via hydrothermal method and immobilized onto TEMPO-oxidized cellulose nanofibrils (TOCNF) aerogels using EDC/NHS coupling. For the first time, this study investigates the dye degradation efficiency of CDs nanozyme.

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Background: Hearing level reference values based on the results of recent audiometry have not been established for the general population of South Korea. This study aimed to evaluate the mean hearing levels of each age group and to measure the annual progression of hearing loss.

Methods: We used the database of the eighth and ninth Korea National Health and Nutrition Examination Survey from 2020 to 2022, and included participants with normal tympanic membranes and without occupational noise exposure.

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Backgrounds And Objectives: The distal radial access (DRA), a potential alternative to the trans-radial approach (TRA), may offer advantages in terms of access site complications due to its smaller vessel diameter, especially for high bleeding risk (HBR) patients. This study aims to investigate the feasibility of DRA in HBR patients.

Methods: Based on data from the KODRA registry, a prospective, multicenter cohort, this study analyzed 1,586 patients who underwent successful percutaneous coronary intervention (PCI) via DRA.

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Background: Tracheostomy is performed in patients with trauma who need prolonged ventilation for respiratory failure or airway management. Although it has benefits, such as reduced sedation and easier care, it also has risks. This study explored the unclear timing, technique, and patient selection criteria for tracheostomy in patients with trauma.

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RNA-based agents (siRNA, miRNA, and mRNA) can selectively manipulate gene expression/proteins and are set to revolutionize a variety of disease treatments. Nanoparticle (NP) platforms have been developed to deliver functional mRNA or siRNA inside cells to overcome their inherent limitations. Recent studies have focused on siRNA to knock down proteins causing drug resistance or mRNA technology to introduce tumor suppressors.

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Background: Chimeric antigen receptor (CAR) engineered NK cells (CAR-NK) are a novel approach to the immunotherapy of hematologic malignancies which seeks to overcome some of the challenges faced by CAR-T cells (CAR-T). With few published clinical studies, preclinical studies can identify strategies to accelerate clinical translation. We conducted a systematic review on the preclinical in vivo use of CAR-NK for the treatment of hematologic malignancies to assess these therapies in a holistic and unbiased manner.

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Article Synopsis
  • Proguanil is metabolized into its active form, cycloguanil, through the OCT1 transporter and CYP2C19 enzyme, with genetic variations affecting this process.
  • The study investigated the impact of specific genetic differences (SLC22A1 polymorphisms) on how the drug is processed in the body, focusing on a Korean population.
  • The results indicate that individuals with the CT genotype of the SLC22A1 polymorphism experience higher levels of proguanil but lower levels of cycloguanil, due to reduced hepatic uptake of proguanil.
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  • Anti-CD19 CAR-engineered T and NK cell therapies have improved treatment for B cell malignancies, but issues like CD19 antigen loss limit effectiveness.
  • Co-administering an anti-CD19 monoclonal antibody boosts the antitumor activity of CAR-T and CAR-NK cells, despite the antibody interfering with CAR binding to the CD19 antigen.
  • This combination therapy alters T cell activation over time, enhancing the effectiveness of CAR cells in killing tumor cells and improving overall treatment outcomes in vivo.
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Cache Valley virus (CVV), a mosquito-borne orthobunyavirus, causes epizootics in ruminants characterized by congenital malformations and fetal death in North America. Only seven human infections have been identified; limited information exists on its potential as a human teratogen. Diagnosis of CVV infections relies on the plaque reduction neutralization test (PRNT), which requires live virus, is time-consuming, and cannot differentiate between recent and past infections.

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The olive flounder, Paralichthys olivaceus, also known as the Korean halibut, is an economically important flatfish in East Asian countries. Here, we provided four fully phased genome assemblies of two different olive flounder individuals using high-fidelity long-read sequencing and their parental short-read sequencing data. We obtained 42-44 Gb of ~15-kb and ~Q30 high-fidelity long reads, and their assembly quality values were ~53.

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Introduction: Recent resting-state electroencephalogram (EEG) studies have consistently reported an association between aberrant functional brain networks (FBNs) and treatment-resistant traits in patients with major depressive disorder (MDD). However, little is known about the changes in FBNs in response to external stimuli in these patients. This study investigates whether changes in the salience network (SN) could predict responsiveness to pharmacological treatment in resting-state and external stimuli conditions.

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Methylsuccinate is a branched-chain, 5-carbon (C5) dicarboxylate that can be generated from the O-independent activation of methane via fumarate addition. However, no established metabolic pathway enables growth and product synthesis from methylsuccinate. Here, we report a synthetic pathway that converts methylsuccinate into two precursor metabolites: pyruvate and acetyl-CoA.

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Article Synopsis
  • Uremia affects drug metabolism, particularly impacting evogliptin, a DPP-4 inhibitor metabolized by CYP3A4, in patients with different levels of kidney disease.
  • A study involving 46 subjects identified the pharmacokinetics (PK) of evogliptin using a two-compartment model, highlighting factors like blood amylase and triglyceride levels.
  • The developed pharmacodynamic (PD) model showed evogliptin's significant DPP-4 inhibition and its high potency, suggesting that renal impairment alters the drug's bioavailability.
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Interethnic differences in the pharmacokinetics of drugs result from a complex interplay of environmental, genetic, and demographic factors. Identifying ethnic differences in pharmacokinetics is challenging due to the multifaceted contributions of the underlying factors. To address these challenges, this paper reviews 9 pharmacokinetic studies meeting the following criteria: (A) Conducted at Seoul National University Hospital from 2013 to 2022 as a single-center study.

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  • Mammalian ATG8 proteins (mATG8s) are crucial for selective autophagy as they recruit proteins to autophagic membranes through LC3-interacting region (LIR) motifs.
  • The study investigates the RavZ protein from Legionella pneumophila and mammalian ATG4B, both of which have functional LIR motifs that impact lipidated mATG8 deconjugation on these membranes.
  • Findings reveal that the position of LIR motifs affects their roles: those at the N-terminus of RavZ are important for targeting and substrate recognition, while the C-terminal LIR motif in ATG4B is key for delipidating LC3B-PE but has a limited
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Aims: The rise in one-person households is a global trend. We aimed to investigate mortality risk in individuals with diabetes living alone (IDLA) using a large-scale population-based database.

Methods: A total of 2,447,557 adults with type 2 diabetes were identified from the Korean National Health Information Database.

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Oligometastatic prostate cancer (OMPC) represents an early stage of metastatic disease characterized by a limited number of lesions. Recent advancements in imaging and treatment have revived interest in personalized therapies, including metastasis-directed radiotherapy (OMDRT) and primary prostate radiotherapy (PPR). This study evaluates the impact of OMDRT timing and the role of PPR on survival outcomes in OMPC patients; In this retrospective cohort study, 82 patients with OMPC who underwent OMDRT between 2010 and 2019 were analyzed.

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Transcranial photobiomodulation (tPBM) has been widely studied for its potential to enhance cognitive functions of the elderly. However, its efficacy varies, with some individuals exhibiting no significant response to the treatment. Considering these inconsistencies, we introduce a machine learning approach aimed at distinguishing between individuals that respond and do not respond to tPBM treatment based on functional near-infrared spectroscopy (fNIRS) acquired before the treatment.

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This study reports dicarboxylate cellulose nanofibrils (DCNF) as a novel reducing and supporting agent for producing silver nanoparticles (AgNPs) with high efficiency (63.82 % reduction) and loading (6.88 %) using UV light.

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Purpose: A fixed-dose combination (FDC) of proton pump inhibitors (PPIs) and antacid salts enables rapid acid suppression through the neutralizing effect of the antacid salt and the rapid absorption of PPIs. This study aimed to compare the pharmacokinetics (PKs) and pharmacodynamics (PDs) of a recently formulated FDC of esomeprazole and magnesium hydroxide to the enteric-coated esomeprazole in healthy subjects.

Methods: A randomized, open-label, multiple-dose, two-treatment, two-way crossover design was conducted in healthy subjects.

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The widespread use of single-use face masks during the recent epidemic has led to significant environmental challenges due to waste pollution. This study explores an innovative approach to address this issue by repurposing discarded face masks for hydrovoltaic energy harvesting. By coating the face masks with carbon black (CB) to enhance their hydrophilic properties, we developed mask-based hydrovoltaic power generators (MHPGs).

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