Publications by authors named "Ji-Yong Park"

For successful infection, the life-threatening pathogen Vibrio vulnificus elaborately regulates the expression of survival and virulence genes using various transcription factors (TFs). In this study, a library of the V. vulnificus mutants carrying specific signature tags in 285 TF genes was constructed and subjected to 16 phenotypic analyses.

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Objectives: This study aimed to investigate the impact of hepatic steatosis on cardiometabolic outcomes in young adults with prediabetes.

Methods: A nationwide cohort study was conducted with 896,585 young adults under 40 years old without diabetes or previous history of cardiovascular disease. Hepatic steatosis was identified using a fatty liver index of ≥ 60.

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Article Synopsis
  • This study investigated how obstructive sleep apnea (OSA) impacts brain activity using EEG and machine learning techniques to analyze the data.
  • Participants were divided into two groups based on their apnea-hypopnea index (AHI), and various EEG analysis methods were employed to extract significant features.
  • The results showed that seven specific EEG features could effectively distinguish between groups, achieving high accuracy, sensitivity, and specificity, indicating the potential of EEG as a biomarker for functional changes in OSA.
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Obesity often leads to inadequate angiogenesis in expanding adipose tissue, resulting in inflammation and insulin resistance. We explored the role of placental growth factor (PlGF) in metabolic syndrome (MS) using mice models of type 2 diabetes, high-fat diet, or aging. Reduced serum PlGF levels were associated with decreased insulin sensitivity and development of MS features.

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Biodegradable radioactive microspheres labeled with positron emitters hold significant promise for diagnostic and therapeutic applications in cancers and other diseases, including arthritis. The alginate-based polymeric microspheres offer advantages such as biocompatibility, biodegradability, and improved stability, making them suitable for clinical applications. In this study, we developed novel positron emission tomography (PET) microspheres using alginate biopolymer radiolabeled with gallium-68 (Ga) through a straightforward conjugation reaction.

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Background: Papillary thyroid microcarcinoma (PTMC) is characterized by its favorable prognosis and potential for active surveillance (AS) as a management option. However, the presence of cervical lymph node (LN) metastasis, especially lateral LN metastasis, significantly impacts management and prognosis. Previous studies have focused on post-surgery risk factors for cervical LN metastasis.

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Background: Iron oxide nanoparticles (IONPs) have been cleared by the Food and Drug Administration (FDA) for various clinical applications, such as tumor-targeted imaging, hyperthermia therapy, drug delivery, and live-cell tracking. However, the application of IONPs as T1 contrast agents has been restricted due to their high r2 values and r2/r1 ratios, which limit their effectiveness in T1 contrast enhancement. Notably, IONPs with diameters smaller than 5 nm, referred to as extremely small-sized IONPs (ESIONs), have demonstrated potential in overcoming these limitations.

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  • The study focuses on enhancing the lithium deposition process on lithium foil-based anodes to prevent unsafe, high-aspect-ratio lithium shapes that can occur when reaction kinetics are slow.
  • Researchers analyze the kinetics of lithium deposition through various real-time and detailed electrochemical methods, aiming to uncover the limitations of current processes.
  • They develop ultra-thin double-walled carbon nanotube membranes that promote safer lithium deposition by creating numerous lithium nuclei, leading to uniform deposition and prolonged battery cycling performance, even under high current densities.
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The effect of growth hormone-releasing hormone (GHRH) plasmid treatment on sow reproductive performance was examined. Forty pregnant sows (three-way crossbreed: Landrace × Yorkshire × Duroc) at 85 days of gestation were included in the study and consisted of twenty primiparous and twenty multiparous sows (third parity). Sows were randomly assigned to the control and treatment groups.

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Lightweight structural materials are commonly used as effective fillers for advanced composites with high toughness. This study focused on enhancing the toughness of direct-spun carbon nanotube yarns (CNTYs) by controlling the micro-textural structure using a water-gap-based direct spinning. Drawing inspiration from the structural features of natural spider silk fibroin, characterized by an α-helix in the amorphous region and β-sheet in the crystalline region, multiscale bundles within CNTYs are reorganized into a unique nano-coil-like structure.

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  • Researchers developed uniform-sized clodronate-encapsulated liposome nanoplatforms to enhance macrophage depletion for immunotherapy, addressing limitations of previous formulations.
  • The new liposomes were functionalized for targeted delivery and labeled for in vivo imaging, demonstrating stability and effective biodistribution in tests.
  • Among the four types created, the mannosylated liposome showed superior ability to deplete M2 macrophages in both normal liver and tumor settings, indicating its potential as an effective treatment option.
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Backgruound: Active surveillance (AS) has been introduced as a management strategy for low-risk papillary thyroid carcinoma (PTC) due to its typically indolent nature. Despite this, the widespread adoption of AS has encountered several challenges. The aim of this systematic review was to evaluate the safety of AS related to disease progression and its benefits compared with immediate surgery (IS).

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Damaged mitochondria accumulation in diabetes is one of the main features that contribute to increased incidence of cognitive impairment by inducing apoptosis. Butyrate is a major metabolite produced by microbiota that has neuroprotective effects by regulating mitochondrial function. However, detailed mechanisms underlying how butyrate can regulate neuronal mitophagy remain unclear.

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Background: This study aimed to evaluate the effectiveness of neo-mannosyl human serum albumin-indocyanine green (MSA-ICG) for detecting metastatic lymph node (LN) and mapping sentinel lymph node (SLN) using mouse footpad uterine tumor models. Additionally, the authors assessed the feasibility of MSA-ICG in SLN mapping in rabbit uterine cancer models.

Materials And Methods: The authors compared the LN targeting ability of MSA-ICG with ICG.

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Article Synopsis
  • - The paper discusses the challenge of creating hydrogel adhesives that are both tough and mechanically resilient for effective tissue adhesion, especially in the context of the human body's movement.
  • - It introduces a new double-network (DN) hydrogel patch that balances tissue adhesion, toughness, and resilience by utilizing specific crosslinkers and linear poly(vinyl imidazole) (PVI).
  • - The resulting hydrogel adhesive features strong wet tissue adhesion and mechanical attributes that facilitate effective tissue sealing and promote healing by keeping the wound area moist.
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Objectives: To investigate the association between the four components of the lipid profile (total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C)) at baseline and composite major adverse cardiovascular events (MACEs) in statin-naïve rheumatoid arthritis (RA) patients with no previous history of cardiovascular events.

Methods: This nationwide population-based cohort study was performed on a total of 15,216 statin-naïve RA patients. The end point was a composite of clinical events, including myocardial infarction (MI), stroke, coronary revascularization, and cardiovascular death.

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Age-related cognitive decline is associated with dysfunctional lymphatic drainage of cerebrospinal fluid (CSF) through meningeal lymphatic vessels. In this study, intrathecal [Cu]Cu-albumin positron emission tomography (PET) was applied in mice to evaluate lymphatic drainage of CSF and its variation with age. [Cu]Cu-albumin PET was performed at multiple time points after intrathecal injection of [Cu]Cu-albumin at an infusion rate of 700 nl/min in adult and aged mice (15-25 months old).

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Stress-induced release of glucocorticoid is an important amyloidogenic factor that upregulates amyloid precursor protein (APP) and β secretase 1 (BACE1) levels. Glucocorticoid also contributes to the pathogenesis of Alzheimer's disease (AD) by increasing ER-mitochondria connectivity, in which amyloid β (Aβ) processing occurs rigorously because of its lipid raft-rich characteristics. However, the mechanism by which glucocorticoid enhances γ-secretase activity in the mitochondrial-associated membrane of ER (MAM) and subsequent accumulation of mitochondrial Aβ is unclear.

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Aβ: amyloid β; AD: Alzheimer disease; AMPK: 5' adenosine monophosphate-activated protein kinase; CTSB: cathepsin B; CTSD: cathepsin D; DM: diabetes mellitus; ESCRT: endosomal sorting complex required for transport; FBXO27: F-box protein 27; iPSC-NDs: induced pluripotent stem cell-derived neuronal differentiated cells; LAMP1: lysosomal-associated membrane protein 1; LMP: lysosomal membrane permeabilization; LRSAM1: leucine rich repeat and sterile alpha motif containing 1; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MTORC1: mechanistic target of rapamycin kinase complex 1; p-MAPT/tau: phosphorylated microtubule associated protein tau; ROS: reactive oxygen species; STZ: streptozotocin; TFE3: transcription factor E3; TFEB: transcription factor EB; TRIM16: tripartite motif containing 16; UBE2QL1: ubiquitin conjugating enzyme E2 Q family like 1; VCP: valosin containing protein.

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Backgruound: There have concerns related with the potential harms of fine-needle aspiration biopsy (FNAB). We aimed to summarize the clinical complications and evaluate the safety of FNAB.

Methods: Studies related with the harms of FNAB were searched on MEDLINE, Embase, Cochrane library, and KoreaMed from 2012 to 2022.

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The physiological crosstalk between glucocorticoid and melatonin maintains neuronal homeostasis in regulating circadian rhythms. However, the stress-inducing level of glucocorticoid triggers mitochondrial dysfunction including defective mitophagy by increasing the activity of glucocorticoid receptors (GRs), leading to neuronal cell death. Melatonin then suppresses glucocorticoid-induced stress-responsive neurodegeneration; however, the regulatory mechanism of melatonin, i.

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Article Synopsis
  • Immune checkpoint inhibitors like anti-PD1 help fight tumors by activating the immune system, but measuring their success just by tumor size may not be reliable.
  • Researchers used mannosylated-serum albumin (MSA) nanoparticles labeled with a radioactive isotope to noninvasively assess the immune environment in tumors, specifically by targeting macrophages associated with anti-PD1 therapy.
  • Results showed that mice responsive to anti-PD1 had more tumor-associated macrophages (TAMs) early in treatment, suggesting that imaging TAMs can effectively indicate the immune response to treatment with immune checkpoint inhibitors.
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Heavy alcohol consumption causes neuronal cell death and cognitive impairment. Neuronal cell death induced by ethanol may result from increased production of the sphingolipid metabolite ceramide. However, the molecular mechanisms of neuronal cell death caused by ethanol-induced ceramide production have not been elucidated.

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Silk protein is being increasingly introduced as a prospective material for biomedical devices. However, a limited locus to intervene in nature-oriented silk protein makes it challenging to implement on-demand functions to silk. Here, we report how polymorphic transitions are related with molecular structures of artificially synthesized silk protein and design principles to construct a green-lithographic and high-performative protein resist.

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