Publications by authors named "Sae-Kyoung Choi"

A Gram-stain-negative, non-motile, aerobic, pale-yellow coloured and oval-shaped bacterium designated GRR-S6-38 was isolated from a tidal flat sediment that collected from Garorim Bay of the Yellow Sea, Republic of Korea. Strain GRR-S6-38 grew at 15-40 °C (optimum, 30 °C) at pH 6-9 (optimum, pH 7) and at 2-6% (w/v) NaCl (optimum, 2% NaCl). Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain GRR-S6-38 was closely related to those of J.

View Article and Find Full Text PDF

Background: We evaluated the prognostic effect of lymphocytopenia caused by preoperative radiation therapy and chemotherapy in patients with rectal cancer.

Methods: A total of 147 patients with rectal cancer who underwent preoperative chemoradiotherapy and surgical resection between 2008 to 2021 participated. Lymphocyte nadir less than 500/μl were defined as lymphocytopenia in this study.

View Article and Find Full Text PDF

Current guidelines recommend a two-step algorithm rather than relying solely on a single test for diagnosing infection. This algorithm starts with enzyme immunoassay (EIA) for detecting glutamate dehydrogenase (GDH) and toxins A/B, followed by nucleic acid amplification test (NAAT) for GDH-positive but toxin-negative cases. This study compared the performance of three commercial NAATs: the STANDARD M10 , Xpert , and BD MAX Cdiff assays, utilized as confirmatory testing of the two-step algorithm.

View Article and Find Full Text PDF

Unlabelled: The spread of carbapenemase-producing Enterobacterales (CPE) is emerging as a significant clinical concern in tertiary hospitals and, in particular, long-term care facilities with deficiencies in infection control. This study aims to evaluate an advanced matrix-assisted laser desorption/ionization (A-MALDI) mass spectrometry method for the identification of carbapenemases and further discrimination of their subtypes in clinical isolates. The A-MALDI method was employed to detect CPE target proteins.

View Article and Find Full Text PDF

Purpose: This study aimed to assess the dosimetric advantages of dual arc increments in head and neck volumetric-modulated arc therapy (VMAT) in the Monaco treatment planning system (TPS).

Methods: Three VMAT plans were created for each of the 10 patients by prescribing 70 Gy in 35 fractions with arc increment combinations of 30°/30°, 15°/15°, and 30°/15° in the Monaco TPS. The dose to 0.

View Article and Find Full Text PDF

SORT1 (sortilin 1), a member of the the Vps10 (vacuolar protein sorting 10) family, is involved in hepatic lipid metabolism by regulating very low-density lipoprotein (VLDL) secretion and facilitating the lysosomal degradation of CES1 (carboxylesterase 1), crucial for triglyceride (TG) breakdown in the liver. This study explores whether SORT1 is targeted for degradation by chaperone-mediated autophagy (CMA), a selective protein degradation pathway that directs proteins containing KFERQ-like motifs to lysosomes via LAMP2A (lysosomal-associated membrane protein 2A). Silencing LAMP2A or HSPA8/Hsc70 with siRNA increased cytosolic SORT1 protein levels.

View Article and Find Full Text PDF
Article Synopsis
  • Methotrexate (MTX) is the main treatment for pediatric acute lymphoblastic leukemia (ALL), but some patients experience delayed clearance of high-dose MTX, leading to severe side effects.
  • Whole-exome sequencing was conducted on 51 Korean pediatric ALL patients, analyzing 341 HD-MTX infusion data points to find genetic variants linked to delayed MTX clearance.
  • Two specific genetic variants, rs1800956 and rs16954698, were identified as significantly associated with this delayed clearance, offering potential pathways to reduce toxic side effects through tailored treatments.
View Article and Find Full Text PDF
Article Synopsis
  • NOTCH3cys variants are common and linked to various small vessel diseases, including early-onset stroke and dementia, but there is no comprehensive staging system to assess their severity.
  • A cohort study created and validated a simple staging system for NOTCH3-SVD by analyzing data from several international cohorts and the UK Biobank, focusing on the impact of these variants on CVD outcomes and cognition.
  • The new system includes 9 disease stages, aiding in understanding the relationship between stages and clinical outcomes like ischemic strokes, cognitive function, and brain damage.
View Article and Find Full Text PDF
Article Synopsis
  • Alzheimer's disease (AD) poses significant treatment challenges, particularly targeting amyloid-β (Aβ), but a new analysis method uncovered 83 dysfunctional pathways relevant to AD in both human brains and lab models.
  • The p38 MAPK pathway was notably upregulated and linked to tau pathology and neuronal damage, highlighting its potential as a therapeutic target.
  • By using integrative pathway activity analysis (IPAA), researchers can combine human data with cellular models to efficiently identify promising drug targets for AD treatment.*
View Article and Find Full Text PDF

Objective: This study aimed to elicit expert consensus on the necessary components of a seclusion room module required to accommodate and manage psychiatric emergency patients requiring both medical and surgical interventions in infectious disease situations.

Methods: A two-round Delphi survey was conducted among 38 medical professionals, architects, and spatial design experts. The survey assessed the effectiveness, feasibility, and urgency of spatial scales, spatial organization, and movement system domains related to the necessary elements of a seclusion room.

View Article and Find Full Text PDF

2D transition-metal dichalcogenides are emerging as key materials for next-generation semiconductor technologies owing to their tunable bandgaps, high carrier mobilities, and exceptional surface-to-volume ratios. Among them, molybdenum disulfide (MoS) has garnered significant attention. However, scalable wafer-level deposition methods that enable uniform layer-controlled synthesis remain a critical challenge.

View Article and Find Full Text PDF
Article Synopsis
  • This study introduces a nanohybrid designed to enhance both photothermal and photodynamic effects for treating cancer, combining various polymers and gold nanoparticles.
  • The unique assembly method produces uniform nanoparticles quickly and effectively, showing potent results when activated by a single near-infrared wavelength.
  • The nanohybrid not only inhibits tumor growth and boosts immune responses but also shows improved efficacy when paired with immune checkpoint inhibitors, making it a promising option for combined cancer therapies.
View Article and Find Full Text PDF
Article Synopsis
  • - This study introduces a cutting-edge acetylene gas sensor using carbon nanotubes (CNTs) embedded in polyimide (PI) for real-time monitoring of transformer oils, overcoming limitations of traditional sensors that analyze gas after extraction.
  • - The sensor’s innovative design protects the CNTs from damage and ensures reliable performance for over 6 months, with sensitivity boosted by gold nanoparticles, achieving a notable response rate of 10.5% at 30 ppm and quick recovery times.
  • - Integrating a CNT-PI heater, the sensor maintains a stable operating temperature and shows excellent durability, performing well even after 10,000 bending cycles, making it suitable for industrial transformer applications.
View Article and Find Full Text PDF
Article Synopsis
  • * The recent term MAFLD improves upon NAFLD by including metabolic dysfunction in its diagnosis, simplifying the criteria for identification.
  • * A new classification named steatotic liver disease (SLD) has emerged in 2023, which further categorizes liver diseases based on metabolic dysfunction, with the term MASLD gaining support for its clearer diagnostic approach.
View Article and Find Full Text PDF

The COVID-19 pandemic forced the rapid development of methods to measure humoral and cellular immunity against SARS-CoV-2. The lack of a global standardized protocol and the high variability of intra- and inter-assay precision of the T-cell response made it difficult to compare T-cell assay results with those of other laboratories. The interferon-gamma enzyme-linked immunosorbent spot (IFN-γ ELISpot) assay for immunogenicity evaluation was validated using naturally infected donor peripheral blood mononuclear cells, a commercially available IFN-γ ELISpot kit, and a SARS-CoV-2 specific peptide pool.

View Article and Find Full Text PDF

Background: Perfluoroalkyl and polyfluoroalkyl substances (PFAS) exposure has been associated with metabolic diseases, however, the underlying molecular pathogenesis remains to be understood. Integrated PFAS and lipidomic analysis has the potential to identify alterations in lipid metabolism pathways for exposome research.

Methods: A targeted LC-MS/MS method was developed for the quantification of 14 PFAS from human plasma samples (n = 96).

View Article and Find Full Text PDF
Article Synopsis
  • * A study followed over 4.6 million Korean adults from 2002 to 2020, examining the impact of national oral examinations (NOE) on dental care behaviors, specifically focusing on dental scaling and treatment for periodontal issues.
  • * The results showed that individuals who had more frequent NOEs (3-6 times) were significantly more likely to receive dental scaling and treatments, suggesting that increasing participation in NOEs could enhance overall oral health in the population.
View Article and Find Full Text PDF

Background: Convergence insufficiency (CI) is a common condition that can impair visual performance and comfort during close visual work. This observational study evaluated the effectiveness of interventions on clinical outcomes and health-related quality-of-life using the Adult Strabismus-20 (AS20) questionnaire in patients with CI.

Methods: Data was extracted from a database collected at first consultation from 2015 to 2022.

View Article and Find Full Text PDF

Delivering ribonucleoproteins (RNPs) for in vivo genome editing is safer than using viruses encoding for Cas9 and its respective guide RNA. However, transient RNP activity does not typically lead to optimal editing outcomes. Here we show that the efficiency of delivering RNPs can be enhanced by cell-penetrating peptides (covalently fused to the protein or as excipients) and that lipid nanoparticles (LNPs) encapsulating RNPs can be optimized for enhanced RNP stability, delivery efficiency and editing potency.

View Article and Find Full Text PDF
Article Synopsis
  • Pyrochlore iridates are notable for studying complex phenomena due to their strong spin-orbit coupling, electronic interactions, and geometrically frustrated lattice structures.
  • In thin films of (111) YIrO with thicknesses ≤30 nm, researchers found a unique quantum disordered state at temperatures as low as 5 K, which was characterized by dispersionless magnetic excitations.
  • Below approximately 125 K, an anomalous Hall effect suggests the existence of chiral spin configurations, attributed to magnetic frustration in the lower-dimensional structure that leads to spin-liquid behavior without long-range order.
View Article and Find Full Text PDF

Lung tissue-resident memory T (T) cells induced by influenza vaccination are crucial for heterosubtypic immunity upon re-exposure to the influenza virus, enabling rapid and robust responses upon reactivation. To enhance the efficacy of influenza vaccines, we induce the generation of lung T cells following intranasal vaccination with a commercial influenza vaccine adjuvanted with NexaVant (NVT), a TLR3 agonist-based adjuvant. We demonstrate that intranasal immunization with the NVT-adjuvanted vaccine provides improved protection against influenza virus infections by inducing the generation of CD4 T cells in the lungs in a type I interferon-dependent manner.

View Article and Find Full Text PDF

To compare the long-term prognostic effect of complete percutaneous coronary intervention (PCI) on cardiovascular events in chronic total occlusion (CTO) patients with the multi-vessel disease (MVD) compared with medical therapy (MT). We enrolled 441 patients with CTO and MVD who underwent PCI. The study population was divided into the CTO-PCI (n = 231) and the CTO-MT (n = 210) groups.

View Article and Find Full Text PDF

Background: Solitary hepatocellular carcinoma measuring ≤3 cm represents approximately 30% of hepatocellular carcinoma cases, yet treatment guidelines lack robust evidence. This study compares oncologic outcomes after ablation, liver resection, and liver transplantation for solitary, small hepatocellular carcinoma.

Methods: We systematically searched databases up to 7 February 2022, for studies including adults with solitary hepatocellular carcinoma ≤3 cm treated by any ablation, liver resection, or liver transplantation.

View Article and Find Full Text PDF