Publications by authors named "Byoung-Chan Kim"

Background/objectives: Sarcopenia, a condition marked by muscle wasting due to aging or inactivity, severely affects older populations. We previously showed that pasteurized HB05 (HB05P), sourced from the breast milk of healthy Korean women, could mitigate muscle wasting in a dexamethasone-induced rat model. Here, we explored whether the oral administration of HB05P can enhance muscle strength and functionality in elderly individuals.

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The demand for glucose-sensing devices has increased along with the increasing diabetic population. Here, we aimed to construct a system with a glucose oxidase (GOx)-integrated Cu-nanoflower (Cu-NF) as the underlying electrode. This novel system was successfully developed by creating a cross-linked GOx within a Cu-NF matrix, forming a c-GOx@Cu-NF-coated film on a carbon screen-printed electrode (CSPE).

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  • Akkermansia muciniphila is important for gut health as it aids in gut immunity, intestinal development, and barrier integrity.
  • The study focuses on a newly discovered protein, Amuc_1409, secreted by A. muciniphila, which enhances intestinal stem cell (ISC) growth and recovery in both lab models and aging male mice.
  • Amuc_1409 works by interacting with E-cadherin, activating Wnt/β-catenin signaling, and is suggested as a potential biological agent for promoting gut health.
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  • The gut microbiota plays a significant role in maintaining immune health and brain function, with emerging research linking it to cognitive decline and dementia in older adults.
  • The study explored the effects of a specific gut bacterium, Agathobaculum butyriciproducens SR79, on cognitive impairment in aged mice, using various behavioral tests to assess changes in cognitive performance.
  • Results indicated that SR79 improved cognitive function in aged mice without affecting other behaviors, and it influenced brain health by altering dendritic spines and reducing astrocyte activation, suggesting it could be a promising treatment for age-related cognitive decline.
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Aptamers are a versatile class of receptors with a high affinity and selectivity for specific targets. Although their ability to recognize individual targets has been extensively studied, some scenarios require the development of receptors capable of identifying all target groups. This study investigated the use of aptamers to achieve the broad-spectrum recognition of groups instead of individual targets.

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Commensal bacteria are critically involved in the establishment of tolerance against inflammatory challenges, the molecular mechanisms of which are just being uncovered. All kingdoms of life produce aminoacyl-tRNA synthetases (ARSs). Thus far, the non-translational roles of ARSs have largely been reported in eukaryotes.

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A highly sensitive and selective NH gas sensor was developed based on single-layer pristine graphene doped with copper(II) oxide (CuO) nanoparticles of a specific size. High-quality single-layer graphene was grown using chemical vapor deposition. Approximately 15 nm-sized CuO colloidal nanoparticles were fabricated by a microwave-assisted thermal method using copper acetate as the precursor, and dimethylformamide as the reducing and stabilizing agent.

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  • - Cronobacter spp. are harmful bacteria found in contaminated powdered infant formula, requiring quick detection to prevent outbreaks.
  • - This study developed a new method to isolate aptamers—short DNA or RNA sequences—that specifically bind to all seven species of Cronobacter, streamlining the selection process.
  • - Four highly effective aptamers were identified, demonstrating strong specificity and the ability to detect these pathogens in contaminated formula at low concentrations.
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Parkinson's disease (PD) is the second-most prevalent neurodegenerative disease and is characterized by dopaminergic neuronal death in the midbrain. Recently, the association between alterations in PD pathology and the gut microbiota has been explored. Microbiota-targeted interventions have been suggested as a novel therapeutic approach for PD.

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Airborne microbes can rapidly spread and cause various infectious diseases worldwide. This necessitates the determination of a fast and highly sensitive detection method. There have been no studies on receptors targeting Citrobacter braakii (C.

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We synthesized an alcohol-based liquid scintillator (AbLS), and we implemented an auxiliary monitoring system with short calibration intervals using AbLS for particle therapy. The commercial liquid scintillator used in previous studies did not allow the user to control the chemical ratio and its composition. In our study, the chemical ratio of AbLS was freely controlled by simultaneously mixing water and alcohol.

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The gut microbiota is associated with the health and longevity of the host. A few methods, such as fecal microbiota transplantation and oral administration of probiotics, have been applied to alter the gut microbiome and promote healthy aging. The changes in host microbiomes still remain poorly understood.

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Background: The gut microbiota is associated with diverse age-related disorders. Several rejuvenation methods, such as probiotic administration and faecal microbiota transplantation, have been applied to alter the gut microbiome and promote healthy ageing. Nevertheless, prolongation of the health span of aged mice by remodelling the gut microbiome remains challenging.

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Mercury (Hg) emissions are increasing annually owing to rapid global industrialization. Hg poisoning can severely affect the human body owing to its persistence and bioaccumulation. In this study, hybrid nanoflowers (NFs) were synthesized by promoting the formation of primary copper-phosphate crystals coordinated with polydopamine (PDA) and FeO magnetic nanoparticles (MNPs), followed by coating with silver nanoparticles on the surface of the NFs (Ag-MNP-PDA-Cu NFs).

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Correction for 'Specific detection of Cronobacter sakazakii in powdered infant formula using ssDNA aptamer' by Hye Ri Kim et al., Analyst, 2021, 146, 3534-3542, DOI: .

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Cronobacter sakazakii (C. sakazakii) is a foodborne pathogen associated with bacterial meningitis, sepsis, and necrotizing enterocolitis in premature and immuno-compromised infants. C.

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The novel strain AM35 was isolated from the faeces of C57BL/6 mice. These cells are strictly anaerobic, gram negative, oxidase negative, catalase positive, rod-shaped and non-motile. The strain produced creamy yellowish colonies on brain heart infusion (BHI) agar with hemin.

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Article Synopsis
  • Alzheimer's disease (AD) is a common neurodegenerative disorder characterized by symptoms like memory loss and cognitive decline, with no cure currently available.
  • Recent research suggests that altering gut microbiota may offer new treatment options, focusing on a specific bacterium called Agathobaculum butyriciproducens (SR79), which produces butyric acid.
  • In studies using mouse models with AD, SR79 demonstrated improvements in cognitive function, reduced inflammation, and decreased amyloid plaque formation, indicating its potential as a therapeutic intervention for AD.
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This paper proposes a new base material, a mixture of alcohol and water, for liquid scintillators. To date, there are no previous R&D studies for particle detectors with alcohol. In this study, 2-ethoxyethanol, which has a higher density than ethanol, was used to make an equivalent substance to the human body, namely, the skin or epidermis.

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Real-time on-site monitoring of bioaerosols in an air environment is important for preventing various adverse health effects including respiratory diseases and allergies caused by bioaerosols. Here, we report the development of an on-site automated bioaerosol-monitoring system (ABMS) using integrated units including a wet-cyclone bioaerosol sampler, a thermal-lysis unit for extracting adenosine triphosphate (ATP), an ATP-detection unit based on the immobilization of luciferase/luciferin for bioluminescence reactions, and a photomultiplier tube-based detector. The performance of the bioaerosol detection system was verified using () as a model source.

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The vaginal microbiota may be important for pregnancy prognosis because vaginal dysbiosis during pregnancy appears to be related to preterm birth (PTB) or pregnancy loss. Previous reports have indicated that a -poor microbial flora in the vagina and intrauterine infection by diverse anaerobes ascending from the vagina are associated with undesirable delivery outcomes. However, no research has involved the use of pyrosequencing analysis to examine vaginal microbiota profiles or their potential associations with high-risk pregnancy in Korean women.

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Usually, isolation of bacteria-specific aptamers by SELEX is a time-consuming process due to the required repeated rounds of binding, separation, and amplification of the probes to target bacteria. Here, we show that it is possible to isolate bacteria-specific DNA aptamers omitting the repeated rounds of binding incubation, separation, and amplification that are indispensable for SELEX. The serial removal of unbound DNAs to the bacterial cells from an initial mixture of bacteria and DNA libraries through serial centrifugation, one-time separation, and further one-time amplification of DNA bound to the target bacterial cells applied in this non-SELEX-based method allows successful aptamer isolation.

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Dysregulated immune responses and impaired function in intestinal epithelial cells contribute to the pathogenesis of inflammatory bowel disease (IBD). Growth arrest and DNA damage-inducible 45 beta (Gadd45β) has been implicated in the pathogenesis of various inflammatory symptoms. However, the role of Gadd45β in IBD is completely unknown.

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Endometriosis is a chronic gynecological disorder, characterized by the presence of ectopic endometrial tissue outside the uterine cavity. Among several hypotheses, Sampson's theory of retrograde menstruation is still applicable. Recent studies have reported the importance of inflammation among endometrial tissue, the peritoneum, and immune cells.

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Intracellular HO monitoring is important and has driven researchers to pursue advancements for the rapid identification of HO, since HO is short-lived in cell lines. An arylboronate derivative has been investigated as a chemospecific fluorescence recognition agent for HO. Triphenylimidazoleoxadiazolephenyl (TPIOP) boronate was contrived as a novel candidate for the rapid and sensitive recognition of HO.

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