Publications by authors named "K-J Song"

Article Synopsis
  • - 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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  • * The researchers developed high-performance fluorescent biosensors called sensitive to arginine (STAR) that allow for real-time monitoring of arginine levels in cells, mice, and clinical samples.
  • * Using STAR, they discovered the influence of different amino acids on arginine levels and found that serum arginine levels tend to rise with age, which could help in assessing the progression of conditions like vitiligo.
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Purpose: To describe a new retinal phenotype characterized by bilateral, multifocal, subretinal vitelliform lesions along the vascular arcades that we refer to as multifocal vitelliform paravascular retinopathy (MVPR).

Design: Observational case series.

Methods: Multimodal retinal imaging including color fundus photography, fundus autofluorescence and cross sectional and en-face optical coherence tomography was performed to evaluate and characterize the lesions of MVPR.

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  • The androgen receptor (AR) is a key target for prostate cancer treatments due to its involvement in cancer progression, but current therapies have limitations, prompting the search for new strategies.
  • Researchers introduced a new AR degrader called UBX-390, which outperforms existing treatments like ARV-110 and ARCC-4 in lab studies on prostate cancer cells.
  • UBX-390 effectively reduces AR activity and gene expression, showing great promise for treating patients with advanced, treatment-resistant prostate cancer.
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Rearrangements that place the oncogenes MYC, BCL2, or BCL6 adjacent to superenhancers are common in mature B-cell lymphomas. Lymphomas with diffuse large B-cell lymphoma (DLBCL) or high-grade morphology with both MYC and BCL2 rearrangements are classified as high-grade B-cell lymphoma with MYC and BCL2 rearrangements ("double hit"; HGBCL-DH-BCL2) and are associated with aggressive disease and poor outcomes. Although it is established that MYC rearrangements involving immunoglobulin (IG) loci are associated with inferior outcomes relative to those involving other non-IG superenhancers, the frequency of and mechanisms driving IG vs non-IG MYC rearrangements have not been elucidated.

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The current noninvasive diagnostic approaches for detecting bladder cancer (BC) often exhibit limited clinical performance, especially for the initial diagnosis. This study aims to evaluate the validity of a streamlined urine-based PENK methylation test called EarlyTect BCD in detecting BC in patients with hematuria scheduled for cystoscopy in Korean and American populations. The test seamlessly integrates two steps, linear target enrichment and quantitative methylation-specific PCR within a single closed tube.

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Background And Objectives: Exome sequencing (ES) demonstrates a 20-50 percent diagnostic yield for patients with a suspected monogenic neurologic disease. Despite the proven efficacy in achieving a diagnosis for such patients, multiple barriers for obtaining exome sequencing remain. This study set out to assess the efficacy of ES in patients with primary neurologic phenotypes who were appropriate candidates for testing but had been unable to pursue clinical testing.

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The randomized, multicenter, double-blind, placebo-controlled, phase III PEONY trial (NCT02586025) demonstrated significantly improved total pathologic complete response (primary endpoint) with dual HER2 blockade in HER2-positive early/locally advanced breast cancer, as previously reported. Here, we present the final, long-term efficacy (secondary endpoints: event-free survival, disease-free survival, overall survival) and safety analysis (62.9 months' median follow-up).

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Obesity is one of the major risk factors for metabolic diseases worldwide. This study examined the effects of YC-1102, an extract derived from the roots of , on 3T3-L1 preadipocytes and high-fat diet (HFD)-induced obese mice. In vivo experiments involved the oral administration of YC-1102 (100, 150, and 200 mg/kg body weight) daily to mice for eight weeks.

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Purpose: To develop a more tailored immunomodulatory treatment (IMT) strategy based on a novel 2-arm risk stratification system in Vogt-Koyanagi-Harada (VKH) patients.

Design: A retrospective clinical cohort study.

Methods: Seventy-nine VKH patients in the acute stage were stratified into low- (n = 58) and high-risk (n = 21) groups based on their exposure to risk factors.

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  • Visible perivascular spaces (BGPVS) are linked to cerebral small vessel disease and may signal higher future stroke risk based on a large analysis of patient data.
  • The study analyzed 7,778 participants with recent ischemic stroke or transient ischemic attack (TIA), examining the relationship between BGPVS, CSOPVS, and various health factors.
  • Results indicated that a greater burden of BGPVS correlates with higher risks of ischemic stroke but not intracranial hemorrhage, while CSOPVS showed weaker associations overall.
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Background: The RENOVATE-COMPLEX-PCI (Randomized Controlled Trial of Intravascular Imaging Guidance Versus Angiography-Guidance on Clinical Outcomes After Complex Percutaneous Coronary Intervention) demonstrated that intravascular imaging-guided percutaneous coronary intervention (PCI) improved clinical outcome compared with angiography-guided PCI for patients with complex coronary artery lesions. This study aims to assess whether the prognostic benefit of intravascular imaging-guided procedural optimization persists in patients undergoing PCI for left main coronary artery disease.

Methods: Of 1639 patients enrolled in the RENOVATE-COMPLEX-PCI, 192 patients with left main coronary artery disease were selected for the current prespecified substudy.

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  • * The study analyzed 532 adult patients who underwent preoperative MRI and surgery for early- to intermediate-stage HCC between 2011 and 2021, with three radiologists assessing various MRI features.
  • * The final model demonstrated greater accuracy in predicting advanced-stage recurrence compared to existing staging systems, achieving a 2-year concordance index of 0.82 versus 0.63-0.68 for the other systems, indicating improved prediction for high-risk patients.
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Purpose: To determine the association of myocardial fibrosis and left ventricular (LV) dyssynchrony measured using cardiac MRI with late gadolinium enhancement (LGE) and feature tracking (FT), respectively, with response to cardiac resynchronization therapy (CRT) for nonischemic dilated cardiomyopathy (DCM).

Materials And Methods: This retrospective study included 98 patients (mean age, 59 years ± 10 [SD]; 54 men) who had nonischemic DCM, as assessed with LGE cardiac MRI before CRT. Cardiac MRI FT-derived dyssynchrony was defined as the SD of the time-to-peak strain (TTP-SD) of the LV segments in three directions (longitudinal, radial, and circumferential).

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Background: Multiple challenges impede interprofessional teamwork and the provision of high-quality care to hospitalized patients.

Objective: To evaluate the effect of interventions to redesign hospital care delivery on teamwork and patient outcomes.

Design: Pragmatic controlled trial.

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Introduction: The incidence of postendoscopic retrograde cholangiopancreatography (ERCP) infections is reported to be up to 18% in patients with biliary obstruction. Antibiotic prophylaxis may reduce the risk of infectious complications after ERCP; however, the clinical value of prophylactic antibiotics in ERCP remains controversial.

Methods: We conducted a double-blind, placebo-controlled, randomized trial to investigate whether the use of prophylactic antibiotics would reduce infectious complications after ERCP in patients with biliary obstruction.

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Circular RNA (circRNA) has various advantages over linear mRNA that is gaining success as a new vaccine and therapeutic agent. Thus, circRNA and its engineering methods have attracted attention recently. In this study, we developed a new circRNA engineering method by end-to-end self-targeting and splicing (STS) reaction using group I intron ribozyme.

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Branched chain amino acid (BCAA) catabolic impairments have been implicated in several diseases. Branched chain ketoacid dehydrogenase (BCKDH) controls the rate limiting step in BCAA degradation, the activity of which is inhibited by BCKDH kinase (BDK)-mediated phosphorylation. Screening efforts to discover BDK inhibitors led to identification of thiophene PF-07208254, which improved cardiometabolic endpoints in mice.

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The Born cross sections of the process e^{+}e^{-}→D^{*0}D^{*-}π^{+} at center-of-mass energies from 4.189 to 4.951 GeV are measured for the first time.

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Background: Data regarding clinical outcomes after intravascular imaging-guided percutaneous coronary intervention (PCI) for complex coronary-artery lesions, as compared with outcomes after angiography-guided PCI, are limited.

Methods: In this prospective, multicenter, open-label trial in South Korea, we randomly assigned patients with complex coronary-artery lesions in a 2:1 ratio to undergo either intravascular imaging-guided PCI or angiography-guided PCI. In the intravascular imaging group, the choice between intravascular ultrasonography and optical coherence tomography was at the operators' discretion.

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  • * A virtual 3-day hackathon brought together 49 early-career scientists from 12 countries, focusing on building tools and pipelines specifically for PD research, with each team working on one of nine distinct projects.
  • * The hackathon not only generated resources to enhance research but also provided training and networking opportunities, ultimately fostering creative problem-solving and collaboration essential for emerging researchers in data science.
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Background: This aim of this study was to develop an objective tool for rating submental fat applied to Koreans.

Methods: The study was conducted between April 2019 and October 2019. A total of 92 subjects were enrolled in the study.

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