Publications by authors named "Ko Y"

Background: On enhancing the image quality of low-dose computed tomography (LDCT), various denoising methods have achieved meaningful improvements. However, they commonly produce over-smoothed results; the denoised images tend to be more blurred than the normal-dose targets (NDCTs). Furthermore, many recent denoising methods employ deep learning(DL)-based models, which require a vast amount of CT images (or image pairs).

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Kimura, commonly known as pussy willow, is a deciduous shrub and tree belonging to the Salicaceae family. The genus spp. has been known as a healing herb for the treatment of fever, inflammation, and pain relief.

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Sepsis, a leading cause of death worldwide, is a harmful inflammatory condition that is primarily caused by an endotoxin released by Gram-negative bacteria. Effective targeted therapeutic strategies for sepsis are lacking. In this study, using an in vitro and in vivo mouse model, we demonstrated that CM1, a derivative of the natural polyphenol chrysin, exerts an anti-inflammatory effect by inducing the expression of the ubiquitin-editing protein TNFAIP3 and the NAD-dependent deacetylase sirtuin 1 (SIRT1).

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Growing research activity on layered double hydroxide (LDH)-based materials for novel applications has been increasing; however, promoting LDH layer growth and examining its morphologies without resorting to extreme pressure conditions remains a challenge. In the present study, we enhance LDH growth and morphology examination without extreme pressure conditions. By synthesizing Mg-Al LDH directly on plasma electrolytic oxidation (PEO)-treated Mg alloy surfaces and pores at ambient pressure, the direct synthesis was achieved feasibly without autoclave requirements, employing a suitable chelating agent.

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Thermosassemble Ionizable Reverse Pluronic (TIRP) platform stands out for its distinctive combination of thermoassemble and ionizable features, effectively overcoming challenges in previous siRNA delivery systems. This study opens up a formation for long-term stabilization, and high loading of siRNA, specifically crafted for targeting oncogenic pathways. TIRP-Bcl2 self-assembles into a unique micelle structure with a nanodiameter of 75.

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The scaffold is a porous three-dimensional (3D) material that supports cell growth and tissue regeneration. Such 3D structures should be generated with simple techniques and nontoxic ingredients to mimic bio-environment and facilitate tissue regeneration. In this work, simple but powerful techniques are demonstrated for the fabrication of lamellar and honeycomb-mimic scaffolds with poly(L-lactic acid).

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Creating a high-frequency electron system demands a high saturation velocity (υ). Herein, we report the high-field transport properties of multilayer van der Waals (vdW) indium selenide (InSe). The InSe is on a hexagonal boron nitride substrate and encapsulated by a thin, noncontinuous In layer, resulting in an impressive electron mobility reaching 2600 cm/(V s) at room temperature.

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Cysteine-rich angiogenic inducer 61 (CYR61) is a protein from the CCN family of matricellular proteins that play diverse regulatory roles in the extracellular matrix. CYR61 is involved in cell adhesion, migration, proliferation, differentiation, apoptosis, and senescence. Here, we show that CYR61 induces chemoresistance in triple-negative breast cancer (TNBC).

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Objective: The aim of this study was to increase the treatment rate of perimenopausal women by providing evidence-based nonpharmaceutical treatments through developing scientific evidence-based sports therapy and verifying its effectiveness.

Methods: In a cross-over design, a total of 33 women were assigned to two different sequences of intervention: sports therapy and telephone intervention (n = 17) or telephone intervention and sports therapy (n = 16). A self-reported clinical symptom survey was conducted before and after the experimental and control periods using the following measures: the Menopause Rating Scale, Patient Health Questionnaire 9, and Patient Health Questionnaire 15.

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Article Synopsis
  • The Penn Alcohol Craving Scale (PACS) is a questionnaire used to measure alcohol craving, and the study aimed to create a Chinese version (PACS-C) while evaluating its effectiveness.
  • The study involved 160 Taiwanese patients and assessed the PACS-C's internal consistency, validity against other craving scales, and test-retest reliability.
  • Results showed that the PACS-C demonstrated strong reliability and valid correlations with other craving measures, making it a useful tool for assessing alcohol cravings in Taiwan.
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When we make a decision, we also estimate the probability that our choice is correct or accurate. This probability estimate is termed our degree of decision confidence. Recent work has reported event-related potential (ERP) correlates of confidence both during decision formation (the centro-parietal positivity component; CPP) and after a decision has been made (the error positivity component; Pe).

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Microbial biodegradation of commercially available poly(butylene adipate-co-terephthalate)-polylactic acid-thermoplastic starch based bio-plastic has been pursued at high temperatures exceeding 55 °C. Herein, we first reported three newly isolated fungal strains from farmland soil samples of Republic of Korea namely, Pyrenochaetopsis sp. strain K2, Staphylotrichum sp.

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Postoperative pancreatic fistula is a life-threatening complication with an unmet need for accurate prediction. This study was aimed to develop preoperative artificial intelligence-based prediction models. Patients who underwent pancreaticoduodenectomy were enrolled and stratified into model development and validation sets by surgery between 2016 and 2017 or in 2018, respectively.

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Article Synopsis
  • Pancreatic cancer has a very low five-year survival rate (10%) primarily due to late diagnoses and restricted treatment options, with current frontline therapies showing limited effectiveness against cancer stem cells (CSCs).
  • The study investigated the effects of various treatments (radiation, 5-FU, and 3-Bromopyruvate) on pancreatic tumor organoids, revealing that while radiation increased CSC markers (OCT4 and SOX2), 5-FU decreased them, and that a combination of 5-FU and radiation inhibited CSC self-renewal.
  • Findings suggest that the expression levels of CSC markers and the β-catenin pathway could be potential targets for improving treatment efficacy against pancreatic cancer.
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Despite the well-established recognition of the health hazards posed by PM-bound PAHs, a comprehensive understanding of their source-specific impact has been lacking. In this study, the health risks associated with PM-bound polycyclic aromatic hydrocarbons (PAHs) and source-specific contributions were investigated in the urban region of Taipei during both cold and warm seasons. The levels of PM-bound PAHs and their potential health risks across different age groups of humans were also characterized.

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Marginal zone (MZ) B cells, which are splenic innate-like B cells that rapidly secrete antibodies (Abs) against blood-borne pathogens, are composed of heterogeneous subpopulations. Here, we showed that MZ B cells can be divided into two distinct subpopulations according to their CD80 expression levels. CD80 MZ B cells exhibited greater Ab-producing, proliferative, and IL-10-secreting capacities than did CD80 MZ B cells.

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Objective: Endovascular aneurysm repair (EVAR) has been used worldwide to treat abdominal aortic aneurysms (AAAs). Outcomes after EVAR within and outside the instruction for use (IFU) remain controversial. We analyzed long-term outcomes of EVAR within-the-IFU compared with that outside-the-IFU and baseline clinical/anatomical characteristics that influence outcomes of EVAR.

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The World Health Organization/International Society of Urological Pathology (WHO/ISUP) grading of renal cell carcinoma (RCC) is classified from grade 1-4, regardless of subtype. The National Comprehensive Cancer Network (NCCN) guidelines (2022) state that if there is an adverse pathological feature, such as grade 3 or higher RCC in stage 1 patients, more rigorous follow-up imaging is recommended. However, the RCC guidelines do not provide specific treatment or follow-up policies by tumor grade.

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The Cancer Genome Atlas (TCGA) and its patient-derived multi-omics datasets have been the backbone of cancer research, and with novel approaches, it continues to shed new insight into the disease. In this study, we delved into a method of multi-omics integration of patient datasets and the association of biological pathways related to the disease. First, across thirty-three types of cancer present in TCGA, we merged genomic mutations and drug response datasets and filtered for the viable variant-drug response combinations available in TCGA, containing more than three samples for each drug response label with RNA sequencing (RNA-seq) and genomic methylation data available for each patient.

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South Korea has experienced outbreaks of foot-and-mouth disease (FMD) of serotypes O and A, leading to nationwide vaccination with a bivalent vaccine. Since the FMD virus (FMDV) Asia1 group-V genotype occurred in North Korea in 2007, an Asia1/MOG/05 vaccine strain belonging to the Asia1 group-V genotype was developed using a genetic recombination method (Asia1/MOG/05-R). This study aimed to evaluate the antigen productivity and viral inactivation kinetics of Asia1/MOG/05-R to assess its commercial viability.

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Chemical exchange saturation transfer with glutamate (GluCEST) imaging is a novel technique for the non-invasive detection and quantification of cerebral Glu levels in neuromolecular processes. Here we used GluCEST imaging and H magnetic resonance spectroscopy (H MRS) to assess in vivo changes in Glu signals within the hippocampus in a rat model of depression induced by a forced swim test. The forced swimming test (FST) group exhibited markedly reduced GluCEST-weighted levels and Glu concentrations when examined using H MRS in the hippocampal region compared to the control group (GluCEST-weighted levels: 3.

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Purpose: CSMed wound dressing, a dressing with various herb extracts, was tested for its therapeutic effect in radiation dermatitis of breast and head-and-neck cancer patients.

Methods: This study included 20 breast cancer patients and 10 head-and-neck cancer patients. Half of the irradiated area was covered with CSMed and the other half was under routine treatment.

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Betel quid (BQ) is the fourth most popular psychoactive substance in the world, and BQ use disorder (BUD) is prevalent in Asian countries. Although the mechanisms underlying BUD remain unclear, studies have reported influences from monoamine oxidase inhibitor. We enrolled 50 patients with BUD and assessed their BQ consumption habits, emotional conditions, and the clinical severity of addiction-assessed using the [Fifth Edition] () criteria, Substance Use Severity Rating Scale, and Yale-Brown Obsessive Compulsive Disorder Rating Scale for BQ.

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Article Synopsis
  • Psychological distress is a notable risk factor for patients with coronary heart disease (CHD), but its impact on clinical outcomes is not fully understood.
  • A study analyzed data from 891 stable CHD patients to assess the relationship between psychological distress, measured by various factors like anxiety and depression, and adverse health events over an average of 5.9 years.
  • Results showed that higher levels of psychological distress were linked to a greater risk of cardiovascular issues, and incorporating this distress measure into traditional risk assessments helped improve predictive accuracy for adverse outcomes.
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