Publications by authors named "Kyu-Sun Lee"

Background: The prognostic significance of changes in left ventricular ejection fraction (LVEF) and wall motion score index (WMSI) in patients with myocardial infarction remains unclear.

Methods: This study evaluated whether changes in LVEF and WMSI can predict clinical outcomes and LV remodeling in post-AMI patients. Using data from the Korea Acute Myocardial Infarction Registry-National Institutes of Health (KAMIR-NIH), 3,510 AMI patients who underwent percutaneous coronary intervention (PCI) were retrospectively analyzed.

View Article and Find Full Text PDF

Background: The relevant time frame for predicting future acute coronary syndrome (ACS) based on coronary lesion characteristics remains uncertain.

Objectives: The aim of this study was to investigate the association of lesion characteristics with test-to-event time and their prognostic impact on ACS.

Methods: The EMERALD II (Exploring the Mechanism of Plaque Rupture in Acute Coronary Syndrome Using Coronary CT Angiography and Computational Fluid Dynamics II) study analyzed 351 patients who underwent coronary computed tomography angiography (CTA) and experienced ACS between 1 month and 3 years of follow-up.

View Article and Find Full Text PDF

The metazoan lifespan is determined in part by a complex signaling network that regulates energy metabolism and stress responses. Key signaling hubs in this network include insulin/IGF-1, AMPK, mTOR, and sirtuins. The Hippo/Mammalian Ste20-like Kinase1 (MST1) pathway has been reported to maintain lifespan in Caenorhabditis elegans, but its role has not been studied in higher metazoans.

View Article and Find Full Text PDF

The trapping of pathogenic ligands can potentially be used to prevent signal transduction mediated by catabolic factor expression in osteoarthritis (OA). Although vaspin is known to function as a pathogenic ligand and represents a novel adipokine, little is known about its function and the impact of its nebulization-based administration in OA. Here we provide a report on the function of vaspin in articular chondrocytes and OA model mice.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the effect of a discharge checklist on the use of guideline-directed medical therapy (GDMT) in patients hospitalized for acute heart failure (HF) from March 2021 to February 2023.
  • Results showed that more patients in the checklist group received two or more components of GDMT (59.6%) compared to the non-checklist group (42.2%), leading to a better overall outcome.
  • The checklist proved particularly beneficial for patients with reduced ejection fraction, reducing the risk of mortality or readmission for HF significantly compared to those who did not use the checklist.
View Article and Find Full Text PDF
Article Synopsis
  • A study was conducted to improve the prediction of which coronary artery lesions could lead to acute coronary syndrome (ACS) by integrating artificial intelligence (AI) with traditional methods.
  • The research focused on patients who had undergone coronary CT angiography (CTA) before experiencing an ACS event, analyzing both culprit (problematic) and nonculprit lesions.
  • The new model incorporating AI features showed significantly better predictability for identifying high-risk lesions compared to standard methods, suggesting that AI can enhance cardiac risk assessment.
View Article and Find Full Text PDF

The effect of changes in immunosuppressive therapy during the acute phase post-heart transplantation (HTx) on clinical outcomes remains unclear. This study aimed to investigate the effects of changes in immunosuppressive therapy by corticosteroid (CS) weaning and everolimus (EVR) initiation during the first year post-HTx on clinical outcomes. We analyzed 622 recipients registered in the Korean Organ Transplant Registry (KOTRY) between January 2014 and December 2021.

View Article and Find Full Text PDF

Background: To make good use of the prognostic value of arterial stiffness, it is important to identify the population with the greatest benefit. In this study, we compared the prognostic value of brachial-ankle pulse wave velocity (baPWV) according to various clinical characteristics.

Methods: A total of 10,597 subjects who underwent baPWV measurement (mean age, 61.

View Article and Find Full Text PDF

Aims: Evidence for the effectiveness of left ventricular (LV) unloading in patients who received venoaterial extracorporeal membrane oxygenation (VA-ECMO) for acute myocardial infarction (AMI) or non-AMI induced cardiogenic shock (CS) is limited. The aim of the present study was to compare the effect of LV unloading in AMI-induced and non-AMI-induced CS.

Methods And Results: This is a single-centre retrospective observational study of patients with CS undergoing VA-ECMO from January 2011 to March 2019.

View Article and Find Full Text PDF

Targeting proximity-labeling enzymes to specific cellular locations is a viable strategy for profiling subcellular proteomes. Here, we generated transgenic mice (MAX-Tg) expressing a mitochondrial matrix-targeted ascorbate peroxidase. Comparative analysis of matrix proteomes from the muscle tissues showed differential enrichment of mitochondrial proteins.

View Article and Find Full Text PDF

Infectious diseases such as Coronavirus disease 2019 (COVID-19) and Middle East respiratory syndrome (MERS) present an increasingly persistent crisis in many parts of the world. COVID-19 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The angiotensin-converting enzyme 2 (ACE2) is a crucial cellular receptor for SARS-CoV-2 infection.

View Article and Find Full Text PDF

Background: Volume overload is associated not only with clinical manifestations but also with poor outcomes of heart failure (HF). However, there is an unmet need for effective methods for serial monitoring of volume status during HF hospitalization. The aim of this study was to evaluate the prognostic implication of serial measurement of bioelectrical impedance analysis (BIA) in patients hospitalized with acute HF.

View Article and Find Full Text PDF

Diabetes mellitus is a major risk factor for the development of heart failure. Furthermore, the prognosis of heart failure is worse in patients with diabetes mellitus than in those without it. Therefore, early diagnosis and proper management of heart failure in patients with diabetes mellitus are important.

View Article and Find Full Text PDF
Article Synopsis
  • The study examined the impact of a discharge checklist on the utilization of guideline-directed medical therapy (GDMT) for heart failure patients during hospitalization.
  • A total of 415 patients were analyzed, with a significant increase in GDMT prescriptions among those who used the checklist (67.6%) compared to those who didn't (50.9%).
  • The results showed that using the checklist was linked to a lower rate of death and rehospitalization in the two months post-discharge, highlighting its effectiveness in improving patient outcomes.
View Article and Find Full Text PDF

Diabetes mellitus is a major risk factor for the development of heart failure. Furthermore, the prognosis of heart failure is worse in patients with diabetes mellitus than in those without it. Therefore, early diagnosis and proper management of heart failure in patients with diabetes mellitus are important.

View Article and Find Full Text PDF

Aims: The aim of this study was to evaluate the efficacy and safety of prasugrel dose de-escalation therapy in patients with diabetes mellitus (DM)-acute coronary syndrome (ACS) who underwent percutaneous coronary intervention (PCI).

Methods And Results: This was a post-hoc analysis of the HOST-REDUCE-POLYTECH-ACS (Harmonizing Optimal Strategy for Treatment of Coronary Artery Diseases-Comparison of Reduction of Prasugrel Dose or Polymer Technology in ACS Patients) randomized trial. The efficacy and safety of prasugrel dose de-escalation therapy (prasugrel 5 mg daily) were compared with conventional therapy (prasugrel 10 mg daily) in patients with DM.

View Article and Find Full Text PDF

A severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) surrogate virus neutralization test (sVNT) was used to determine the degree of inhibition of binding between human angiotensin converting enzyme 2 (hACE2) and the receptor binding domain (RBD) of spike protein by neutralizing antibodies in a biosafety level 2 facility. Here, to improve the sensitivity and specificity of the commercial sVNT, we developed a new biotin based sVNT using biotinylated RBD and HRP conjugated streptavidin instead of HRP conjugated RBD for direct detection in an ELISA assay that strongly correlated to the FDA approved cPass sVNT commercial kit (R = 0.8521) and pseudo virus neutralization test (R = 0.

View Article and Find Full Text PDF

Clustered regularly interspaced short palindromic repeats (CRISPR)-based diagnostics have emerged as next-generation molecular diagnostics. In CRISPR-based diagnostics, Cas12 and Cas13 proteins have been widely employed to detect DNA and RNA, respectively. Herein, we developed a novel hybrid Cas protein capable of detecting universal nucleic acids (DNA and RNA).

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to explore whether high levels of SARS-CoV-2 antibodies worsen COVID-19 symptoms or if severe symptoms lead to higher antibody levels.
  • Researchers analyzed 40 patients with COVID-19, measuring antibody levels and assessing chest X-ray scores to determine disease severity.
  • Results indicated that older patients and those with pneumonia had higher antibody levels, and the severity of the disease appeared to drive antibody production rather than the other way around.
View Article and Find Full Text PDF

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has led to a pandemic of acute respiratory disease, namely coronavirus disease (COVID-19). This disease threatens human health and public safety. Early diagnosis, isolation, and prevention are important to suppress the outbreak of COVID 19 given the lack of specific antiviral drugs to treat this disease and the emergence of various variants of the virus that cause breakthrough infections even after vaccine administration.

View Article and Find Full Text PDF

Objective: Glucagon in mammals and its homolog (adipokinetic hormone [AKH] in ) are peptide hormones which regulate lipid metabolism by breaking down triglycerides. Although regulatory mechanisms of glucagon and AKH expression have been widely studied, post-transcriptional gene expression of glucagon has not been investigated thoroughly. In this study, we aimed to profile proteins binding with messenger RNA (mRNA) in mouse and mRNA in Drosophila.

View Article and Find Full Text PDF
Article Synopsis
  • The rise in drug-facilitated crimes highlights the need for effective prevention strategies, particularly for quick detection of amphetamine-type stimulants (ATSs) before they are ingested.
  • Researchers developed drug screening kits (DSKs) that utilize specialized paper sensors to detect ATSs in drinks through a color change from blue to red, observable without any specialized equipment.
  • The DSKs successfully identified ATSs in both alcoholic and nonalcoholic beverages, showcasing their potential as a tool for preventing drug-facilitated crimes.
View Article and Find Full Text PDF

Background: Dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A) is a significant pathogenic factor in Down syndrome (DS), wherein DYRK1A is overexpressed by 1.5-fold because of trisomy of human chromosome 21. Thus, DYRK1A inhibition is considered a therapeutic strategy to modify the disease.

View Article and Find Full Text PDF

Sarcopenia is a syndrome characterized by progressive loss of muscle mass and function during aging. Although mitochondrial dysfunction and related metabolic defects precede age-related changes in muscle, their contributions to muscle aging are still not well known. In this study, we used a Drosophila model to investigate the role of lipophorin receptors (LpRs), a Drosophila homologue of the mammalian very low-density lipoprotein receptor (VLDLR), in mitochondrial dynamics and muscle aging.

View Article and Find Full Text PDF

In patients with advanced-stage cancer, cancer-associated anorexia affects treatment success and patient survival. However, the underlying mechanism is poorly understood. Here, we show that Dilp8, a Drosophila homologue of mammalian insulin-like 3 peptide (INSL3), is secreted from tumour tissues and induces anorexia through the Lgr3 receptor in the brain.

View Article and Find Full Text PDF