Publications by authors named "Lee Chan"

Introduction: Annual screening for hydroxychloroquine (HCQ) retinopathy is recommended, and electroretinography (ERG) is considered a gold-standard test, but there are screening shortfalls and standard ERG is burdensome and has limited availability. Newer, portable ERG devices using skin-based electrodes may increase screening capacity but need validation. This study aims to determine initial device accuracies and feasibility of further research.

View Article and Find Full Text PDF

A machine learning (ML) strategy is suggested to optimize dual-layer oxide thin film transistor (TFTs) performance. In this study, Bayesian optimization (BO), an algorithm recognized for its efficiency in optimizing material design, is applied to guide the design of a channel layer composed of IZO and IGZO. The sputtering fabrication process, which has attracted attention as an oxide semiconductor channel layer deposition method, is fine-tuned using ML to enhance multiple electrical characteristics of transistors: field-effect mobility, threshold voltage, and subthreshold swing.

View Article and Find Full Text PDF

Two types of bismuth films (micro-Bi and nano-Bi) were prepared, and their electrocatalytic behavior was studied in terms of reduction current and product selectivity in a potential range of -0.776 to -1.376 V vs RHE.

View Article and Find Full Text PDF

The integration of organometallic compounds with metal nanoparticles can, in principle, generate hybrid nanocatalysts endowed with augmented functionality, presenting substantial promise for catalytic applications. Herein, we synthesize an atomically precise metal cluster (AgCu) catalyst integrated with alkynylferrocene molecules (AgCu-Fc). This hybrid catalyst design facilitates a continuous electron transfer channel via an ethynyl bridge and establishes a distinctive local chemical environment, resulting in remarkably enhanced catalytic activity in CO electroreduction.

View Article and Find Full Text PDF
Article Synopsis
  • - The study explored the link between smoking and alcohol use disorder in 968 male firefighters, focusing on the role of polycyclic aromatic hydrocarbons (PAHs) found in tobacco smoke as potential mediators in this relationship.
  • - Results indicated that specific PAH metabolites, particularly 2-naphthol and 2-hydroxyfluorene, were associated with smoking history and significantly mediated the effects of smoking on the risk of developing alcohol use disorder.
  • - The findings suggest that exposure to PAHs through smoking may increase the likelihood of addiction issues, highlighting a crucial aspect of how smoking can contribute to alcohol use disorder.
View Article and Find Full Text PDF

Objectives: To report our institution's experience with patients who underwent subtotal petrosectomy (STP) for refractory ear disease who are candidates for cochlear implant (CI) and to highlight simultaneous STP with CI its advantages, surgical outcomes, post-operative complications management, and considerations for staging a procedure.

Methods: A retrospective study was performed in a single tertiary referral university hospital. The medical records of seventy patients (70 ears) who underwent STP for refractory ear disease who were candidates for CI were retrospectively evaluated.

View Article and Find Full Text PDF

Background: In patients with metastatic renal cell carcinoma (mRCC), sites of metastatic involvement have been reported to be associated with a difference in survival. However, the frequency and survival according to different sites of metastases in Korean patients with mRCC remain unclear. Therefore, this study aimed to assess the frequency of metastatic site involvement and the association between sites of metastatic involvement and survival in Korean patients with mRCC.

View Article and Find Full Text PDF

Background: Intensive blood pressure (BP) management within 24 hours after successful reperfusion following endovascular thrombectomy (EVT) is associated with worse functional outcomes than conventional BP management in Asian randomized controlled trials. Given the high prevalence of intracranial atherosclerotic stenosis (ICAS) in Asia, ICAS may influence these outcomes.

Aims: We aimed to assess whether ICAS affects the outcomes of intensive BP management after successful EVT.

View Article and Find Full Text PDF
Article Synopsis
  • This study focuses on how E3 ligases interact with substrates through specific C-degron sequences, which are essential for the ubiquitin-proteasome system’s function in protein degradation.* -
  • Researchers compared ubiquitylation activities of various substrates and used techniques like biochemistry and crystallography to uncover how different E3 ligases from the KLHDCX family recognize C-degrons.* -
  • Findings indicate that while a common anchoring motif aids in binding, variations in structure and additional interactions influence which substrates can be recognized and degraded, highlighting the complexity of substrate specificity.*
View Article and Find Full Text PDF

This study aimed to investigate the characteristics of out-of-office blood pressure (BP) measurements in patients with apparent treatment-resistant hypertension (aRH) enrolled from 15 tertiary care centers in South Korea. aRH was defined as having uncontrolled office BP ≥ 130/80 mmHg despite receiving three classes of antihypertensive medication or any level of BP despite receiving ≥4 classes of antihypertensive medication. Patients with complete data for office BP, 24-h ambulatory BP monitoring (ABPM), and home BP measurements at baseline were included.

View Article and Find Full Text PDF
Article Synopsis
  • Limited research exists on resistant hypertension in Asian populations and the effects of poor medication adherence on health outcomes, particularly in those classified as treatment-resistant.
  • A nationwide cohort study in Korea analyzed data from over 935,000 patients from 2013 to 2018, revealing that those with apparent treatment-resistant hypertension faced greater risks of severe cardiovascular events compared to nonresistant patients.
  • Among resistant hypertension patients, adherence to medication varied, with poor adherence linked to a significantly higher risk of adverse outcomes, highlighting the importance of proper treatment compliance.
View Article and Find Full Text PDF

Gouty inflammation, caused by uric acid crystal deposition, primarily affects tissues around the toe joints and triggers potent inflammatory responses. Current treatments focus on alleviating inflammation and pain using pharmaceutical agents, which can lead to side effects and complications. This has generated interest in non-pharmacological interventions, such as non-invasive vagus nerve stimulation (VNS).

View Article and Find Full Text PDF
Article Synopsis
  • Childhood trauma negatively affects emotional regulation, yet there's limited research on its impact in individuals with mood disorders.
  • The study analyzed 779 patients with different mood disorders (MDD, BDI, BDII) using the Childhood Trauma Questionnaire and Emotion Regulation Skills Questionnaire to evaluate associations.
  • Findings indicated that emotional neglect is significantly linked to poor emotional regulation skills, particularly in those with bipolar I disorder, suggesting a need for further research on how childhood trauma shapes emotional regulation in mood disorders.
View Article and Find Full Text PDF

Background: Renal function deterioration during systemic therapy in patients with metastatic renal cell carcinoma (mRCC) is a long-term concern in treatment planning. Although hypertension (HTN) and diabetes mellitus (DM) are the most common factors that affect chronic kidney disease (CKD) development and progression, their impact on renal function during targeted therapy is unclear. This study investigated whether DM and HTN were associated with a decline in renal function during first-line targeted therapy for mRCC.

View Article and Find Full Text PDF

Aims: Whether medication adherence to angiotensin receptor-neprilysin inhibitor (ARNI) in real-world practice is associated with the reduced risk of all-cause mortality or hospitalization relative to that with traditional renin-angiotensin system (RAS) blockade remains unclear. This study investigated the influence of medication adherence of ARNI and traditional RAS blockade in heart failure with reduced ejection fraction (HFrEF).

Method: We conducted a nationwide longitudinal cohort study with patients with HFrEF using data from the Korean National Health Insurance Service data (2017-2021) covering the entire population.

View Article and Find Full Text PDF

PROTAC® (proteolysis-targeting chimera) molecules induce proximity between an E3 ligase and protein-of-interest (POI) to target the POI for ubiquitin-mediated degradation. Cooperative E3-PROTAC-POI complexes have potential to achieve neo-substrate selectivity beyond that established by POI binding to the ligand alone. Here, we extend the collection of ubiquitin ligases employable for cooperative ternary complex formation to include the C-degron E3 KLHDC2.

View Article and Find Full Text PDF

Background: IL-2 regulates T cell differentiation: low-dose IL-2 induces immunoregulatory Treg differentiation, while high-dose IL-2 acts as a potent activator of cytotoxic T cells and NK cells. Therefore, high-dose IL-2 has been studied for use in cancer immunotherapy. We aimed to utilize low-dose IL-2 to treat inflammatory diseases such as obesity and insulin resistance, which involve low-grade chronic inflammation.

View Article and Find Full Text PDF
Article Synopsis
  • * Analyzed data from 207 eyes over two years showed no significant differences in visual acuity, intraocular pressure, or glaucoma medication use between the two groups, though more cataracts were noted in optometrist-treated eyes.
  • * Overall, the study concluded that both optometrists and ophthalmologists have similar SLT treatment outcomes, but ophthalmologist-treated eyes had higher medication use and lower rates of subsequent surgery.
View Article and Find Full Text PDF
Article Synopsis
  • The study highlights that transthyretin amyloidosis cardiomyopathy (ATTR-CM) is often overlooked in patients with heart failure and an LVEF greater than 40%.
  • Out of 97 studied patients, 13.4% were diagnosed with ATTR-CM, primarily affecting older males, indicating a notable prevalence in this demographic.
  • Key features in ATTR-CM patients included higher rates of polyneuropathy and carpal tunnel syndrome, along with specific heart-related metrics like thicker heart walls and prolonged PR interval, suggesting clinicians should consider ATTR when male patients show these symptoms.
View Article and Find Full Text PDF

Bladder cancer (BCa) with variant histology (VH) is associated with an increased risk of recurrence and progression, as well as worse survival. However, the available literature does not provide the prognostic value of VH based on its tumor burden in non-muscle invasive BCa (NMIBC). The purpose of the present study was to investigate the prognosis of VH in NMIBC with low-tumor volume compared with conventional urothelial carcinoma (UC) with a similar tumor burden.

View Article and Find Full Text PDF

Hypothalamic innate immune responses to dietary fats underpin the pathogenesis of obesity, in which microglia play a critical role. Progranulin (PGRN) is an evolutionarily conserved secretory protein containing seven and a half granulin (GRN) motifs. It is cleaved into GRNs by multiple proteases.

View Article and Find Full Text PDF

Background: Because patients infected with respiratory syncytial virus (RSV) have been reported to be older than patients infected with influenza virus, the more frequent incidence of complications in RSV-infected patients may be age-related. This study compared clinical characteristics and outcomes in hospitalized adults infected with RSV with findings in age- and sex-matched adults infected with influenza virus.

Methods: The medical records of hospitalized adult patients infected with RSV or influenza virus at two university hospitals from 2013 to 2022 were retrospectively analyzed.

View Article and Find Full Text PDF

The calcareous materials used in constructing the Phaya Thon Zu temple at the Bagan historical sites in Myanmar are mortars, plasters, and stuccos. Among them, the mortars and plasters are a mixture of original and new materials used for recent conservation treatments. In this study, the making techniques were examined through analysis of calcareous materials by production period.

View Article and Find Full Text PDF
Article Synopsis
  • Clonal hematopoiesis of indeterminate potential (CHIP) is a condition where mutated blood stem cells expand and is linked to immune changes, prompting a study on its possible connection to Parkinson's disease (PD).
  • Researchers analyzed blood DNA from 341 PD patients, 92 with isolated REM sleep behavior disorder (iRBD), and 5003 controls, focusing on specific genetic mutations related to blood disorders.
  • The study found that PD patients, especially those with rapid motor progression, had a higher prevalence of CHIP with TET2 mutations compared to controls, indicating potential immune dysfunction in PD's development.
View Article and Find Full Text PDF