Publications by authors named "Hyunjun Park"

Clinical remission (CR) has emerged as a potential therapeutic goal in patients with severe asthma eligible for biologic agents. However, its impact on long-term outcomes in asthma patients managed with maintenance inhaler therapy remains unclear. In this retrospective cohort study, we evaluated adult asthma patients on maintenance inhalers to investigate the long-term outcomes associated with achieving CR.

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Background: Radiologic emphysema is increasingly observed in patients with asthma, yet its prognostic significance remains unclear. This study aimed to evaluate whether emphysema identified on chest computed tomography (CT) predicts accelerated lung function decline among asthma patients.

Methods: We conducted a retrospective cohort study of adult asthma patients who received inhaled corticosteroid therapy and underwent serial pulmonary function tests over a minimum follow-up of one year at two tertiary hospitals.

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Background: While enteral feeding intolerance (EFI) is associated with worse clinical outcomes in critically ill patients, the relationship between the number of days of EFI and mortality outcomes remains unclear.

Methods: We retrospectively analyzed adult patients admitted to the medical intensive care unit (ICU) with septic shock at a tertiary referral center. EFI was defined as the presence of vomiting, abdominal distension, pain, diarrhea, or radiographic evidence of ileus.

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Skin aging is influenced by structural alterations, oxidative stress, inflammation, and microbiome changes, and a comprehensive approach to addressing these factors may be effective for mitigating skin aging. This study evaluates the multifaceted anti-aging effects of heat-killed (HK-HN910) and lysed (LS-HN910) forms of Lactobacillus paragasseri HN910. Protective effects on cell viability, cell permeability, nitric oxide (NO) production, and skin anti-aging gene expression for both HK-HN910 and LS-HN910 were observed.

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Background: Low muscle mass (LMM) is recognized as a poor prognostic factor in various chronic lung diseases. However, its prognostic impact on recipients of lung transplants remains inconclusive.

Methods: We retrospectively analyzed patients who underwent lung transplantation at a tertiary referral center in South Korea.

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Introduction: Despite advancements in asthma management, many patients continue to experience poor disease control, lung function decline, and frequent exacerbations. Clinical remission (CR) has been proposed as a novel treatment target and surrogate marker for long-term outcomes. This study evaluates whether early CR at 1 year after inhaled corticosteroid (ICS) initiation influences lung function decline and exacerbation risk in asthma.

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Crystal violet (CV) is a disinfectant and antifungal agent used in aquaculture that plays a vital role in treating aquatic diseases and sterilizing water. However, its potential for strong toxicity, including carcinogenicity and mutagenicity, upon accumulation in the body raises concerns regarding its safe use. Therefore, there is a growing need for the quantitative detection of CV in its early application stages to ensure human safety.

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To achieve the commercialization of two-dimensional (2D) semiconductors, the identification of an appropriate combination of 2D semiconductors and three-dimensional (3D) metals is crucial. Furthermore, understanding the van der Waals (vdW) interactions between these materials in thin-film semiconductor processes is essential. Optimizing these interactions requires precise control over the properties of the vdW interface through specific pre- or post-treatment methods.

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Real-time monitoring of infinitesimal deformations on complex morphologies is essential for precision biomechanical engineering. While flexible strain sensors facilitate real-time monitoring with shape-adaptive properties, their sensitivity is generally lower than spectroscopic imaging methods. Crack-based strain sensors achieve enhanced sensitivity with gauge factors (GFs) exceeding 30,000; however, such GFs are only attainable at large strains exceeding several percent and decline below 10 for strains under 10, rendering them inadequate for minute deformations.

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Background: Depression and memory loss are prevalent neurodegenerative disorders, with diabetic patients facing an elevated risk of brain dysfunction. Methylglyoxal (MGO) formation, which is heightened in diabetes owing to hyperglycemia and gut dysbiosis, may serve as a critical link between diabetes and brain diseases. Despite the high prevalence of MGO, the precise mechanisms underlying MGO-induced depression and memory loss remain unclear.

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Cyanobacteria play an essential role in nutrient cycling in aquatic ecosystems. However, certain species adversely affect the environment and human health by causing harmful cyanobacterial algal blooms (cyanoHABs) and producing cyanotoxins. To address this issue, continuous cyanoHAB monitoring has been considered; however, a gold standard has not yet been established.

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Although various chemically synthesized materials are essential in medicine, food, and agriculture, they can exert unexpected side effects on the environment and human health by releasing certain toxic chemicals. Therefore, eco-friendly and biocompatible biomaterials based on natural resources are being actively explored. Recently, biosilica derived from diatoms has attracted attention in various biomedical fields, including drug delivery systems (DDS), due to its uniform porous nano-pattern, hierarchical structure, and abundant silanol functional groups.

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Article Synopsis
  • Cavities in Mycobacterium avium complex pulmonary disease (MAC-PD) indicate a higher disease burden and worse outcomes, but their behavior during treatment is not fully understood.
  • In a study of 136 patients treated for MAC-PD, cavity obliteration was linked to a higher rate of microbiological cure (54.4% achieved it after treatment).
  • The study found that significant cavity reduction is associated with better outcomes, including lower mortality rates, making cavity changes a potential indicator for treatment response in MAC-PD.
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A fluorescent dye, a dithiophene-conjugated benzothiazole derivative (), was prepared to have high fluorescence emission quantum yields (Φ) across various organic solvents. Its emission color modulation, from bright blue to deep red, was achieved through intramolecular charge transfer (ICT), acid-base equilibrium, and host-guest chemistry. Although it exhibits a weak solvatochromic effect, exhibited a bright fluorescence emission around 480 nm upon excitation at 390 nm in most solvents.

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Article Synopsis
  • Hg is a highly toxic heavy metal that can accumulate in the food chain, posing health risks, which highlights the need for effective detection methods.
  • The study developed a sensitive surface-enhanced Raman scattering (SERS) sensor using a selective probe and the double coffee ring effect to improve detection of Hg, achieving a low limit of 208.71 fM.
  • Practical applications were demonstrated by successfully detecting Hg in various water and food samples, with results presented in an intuitive pizza-shaped mapping image for easy understanding.
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Cancer, a life-threatening genetic disease caused by abnormalities in normal cell growth regulatory functions, poses a significant challenge that current medical technologies cannot fully overcome. The current desired breakthrough is to diagnose cancer as early as possible and increase survival rates through treatments tailored to the prognosis and appropriate follow-up. From a perspective that reflects this contemporary paradigm of cancer diagnostics, exosomes are emerging as promising biomarkers.

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Introduction: The advances of self-crossing hyaluronic acid (SC-HA) fillers combination use with polydioxanone thread in minipigs were examined for compatibility, effectiveness, and immune response.

Materials And Methods: A 12-week experiment was conducted using 6 minipigs (3 male and 3 female each) to evaluate the effects of SC-HA filler. The molecular weight of SC-HA filler was fixed at 200 kDa and alternative storage modulus of G80, G250, and G500 were examined.

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Introduction: Polynucleotides (PN) are becoming more prominent in aesthetic medicine. However, the structural characteristics of PN have not been published and PN from different companies may have different structural characteristics. This study aimed to elucidate the structural attributes of DOT™ PN and distinguish differences with polydeoxyribonucleotides (PDRN) using high-resolution scanning electron microscopy (SEM) imaging.

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Thiabendazole (TBZ) is a benzimidazole; owing to its potent antimicrobial properties, TBZ is extensively employed in agriculture as a fungicide and pesticide. However, TBZ poses environmental risks, and excessive exposure to TBZ through various leakage pathways can cause adverse effects in humans. Therefore, a method must be developed for early and sensitive detection of TBZ over a range of concentrations, considering both human and environmental perspectives.

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The multiple wavelength diode laser (MWDL) is a sophisticated device designed to target deeper skin layers by emitting various wavelengths. Its unique feature is the ability to deliver heat to specific depths within the tissue using different wavelengths while simultaneously cooling the skin surface. Recent research by Choi et al.

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Article Synopsis
  • Uric acid (UA) is a key metabolite that needs to be properly regulated in the bloodstream, with its imbalance leading to health issues.
  • A new sensor platform using a starfish-inspired surface-enhanced Raman spectroscopy (SERS) substrate has been developed, featuring an innovative nanostructure for better detection.
  • This AF-SERS substrate can accurately detect UA at low concentrations and is effective in identifying varying UA levels in real samples like serum and urine, showcasing its practical use in health monitoring.
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The present study identified two novel glutathione S-transferase (GST) genes from the toxic dinoflagellate Alexandrium pacificum and examined their molecular characteristics and transcriptional responses to algicides and environmental contaminants. Bioinformatic analysis revealed that both ApGSTs are cytosolic, belonging to the chi-like class (ApGST1) and an undefined class (ApGST2). The overall expression of ApGSTs showed similar patterns depending on the exposed contaminants, while they were differently regulated by polychlorinated biphenyl (PCB).

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Wire bonding, one of the methods for electrically connecting a semiconductor chip with a substrate, involves attaching thin metal wires to pads. It is the oldest electrical connection method that exhibits high compatibility with other processes. The metal wires used for electrical connection in wire bonding are mainly made of Au, Cu, and Ag.

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Construction of three-dimensional (3D) frameworks maintaining intrinsic photophysical properties of monomeric building blocks is difficult and challenging due to the existence of various molecular interactions, such as metal-organic and π-π interactions. A 3D hydrogen-bonded organic framework () with permanent porosity was constructed using a porphyrin having six carboxylic acid groups (). Brunauer-Emmett-Teller surface area measurement indicated that has a porous structure with a surface area of 392 m/g.

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Background: Patients with moyamoya disease (MMD) have a high risk of stroke or death. We investigated whether extracranial to intracranial bypass surgery can reduce mortality by preventing strokes in patients with MMD.

Methods And Results: This nationwide retrospective cohort study encompassed patients with MMD registered under the Rare Intractable Diseases program via the Relieved Co-Payment Policy between 2006 and 2019, using the Korean National Health Insurance Service database.

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