Publications by authors named "Hyeon-Ji Kim"

In this study, we describe the anti-obesity effects of a novel combination of mixture ( HY7601 and KY1032) and leaf extract of () in mice. The administration of the probiotic mixture of HY7601 and KY1032 in combination with the leaf extract of significantly attenuated fat tissue formation and body weight gain in mice fed a high-fat diet. The white adipose fat mass, comprising the inguinal and epididymal fat pads, was most effectively reduced when the probiotic mixture and leaf extract was orally administered to the mice in combination.

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Nanoporous metals have unique potentials for energy applications with a high surface area despite the percolating structure. Yet, a highly corrosive environment is required for the synthesis of porous metals with conventional dealloying methods, limiting the large-scale fabrication of porous structures for reactive metals. In this study, we synthesize a highly reactive Mg nanoporous system through a facile organic solution-based approach without any harsh etching.

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Purpose: This study aims to investigate the role of Cytochrome b-245 chaperone 1 (CYBC1) in glioblastoma (GBM) progression, focusing on its involvement in reactive oxygen species (ROS) production and associated signaling pathways. Understanding the molecular mechanisms driven by CYBC1 could provide new therapeutic targets and prognostic markers for GBM.

Materials And Methods: Publicly available datasets were analyzed to assess CYBC1 expression in GBM and its correlation with patient survival.

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Background/objectives: In aerobic organisms, such as humans, oxygen radicals are inevitably produced. To counteract oxidation, the body generates antioxidant substances that suppress free radicals. However, levels of reactive oxygen species (ROS) increase due to aging and lifestyle factors, leading to exposure to various diseases.

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  • Premenstrual syndrome (PMS) causes significant physical and psychological symptoms during the luteal phase of the menstrual cycle and can greatly affect quality of life.
  • This study examined the effects of HY7801 on PMS by conducting lab tests and experiments on mice, finding that it significantly inhibits harmful hormone and cytokine secretion.
  • Results suggest that HY7801 can help alleviate PMS symptoms by balancing hormones and reducing inflammation in the body.
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  • UBXN6 is a crucial cofactor for p97, involved in various cellular activities, and its role in the innate immune system is not well understood.
  • In sepsis patients, UBXN6 levels increase and are linked to lower inflammatory gene activity while promoting autophagy through Forkhead box O3 expression.
  • In experiments with mice, lack of UBXN6 in macrophages led to worse inflammation and metabolic changes, indicating UBXN6's importance in regulating immune responses and maintaining proper cellular function during sepsis.
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Preeclampsia is a hypertensive disorder of pregnancy that can lead to stillbirth and preterm birth if not treated promptly. Currently, the diagnosis of preeclampsia relies on clinical symptoms such as hypertension and proteinuria, along with invasive blood tests. Here, we investigate the role of soluble proteins and exosomes in noninvasive diagnosing preeclampsia non-invasively using maternal urine and urine-derived exosomes.

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Reactive oxygen species (ROS) are produced from energy metabolism and may cause diseases or cell death. Antioxidation refers to the suppression of ROS production and is considered beneficial in preventing diseases. This study aimed to examine the antioxidative effects of Makino (COM) extracts and fractions using as an experimental model.

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Background/aim: Given the high frequency and mortality rate of lung cancer, diverse molecular studies have been undertaken to understand cancer pathophysiology and develop novel treatment strategies. The PDIA4 gene, which is involved in protein assembly and endoplasmic reticulum homeostasis, is overexpressed in various lung cancer subtypes. However, its exact function in lung adenocarcinoma (LUAD) remains elusive.

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Non-alcoholic fatty acid disease (NAFLD) is caused by a build-up of fat in the liver, inducing local inflammation and fibrosis. We evaluated the effects of probiotic lactic acid-generating bacteria (LAB) derived from a traditional fermented beverage in a mouse model of NAFLD. The LAB isolated from this traditional Korean beverage were screened using the human hepatic cell line HepG2, and HY7207 (HY7207), which was the most effective inhibitor of fat accumulation, was selected for further study.

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Evidence supporting the prescription of effortful swallowing (ES) as a rehabilitation exercise remains lacking. This study aimed to evaluate the effect of rest interval length between sets on oral swallowing pressure during ES exercises in healthy adults. This study was a randomized trial of participants using a crossover design.

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  • - Oral lichen planus (OLP) is a chronic inflammatory condition driven by cytotoxic T cell activity that leads to the death of skin cells called keratinocytes, though its exact causes remain unclear.
  • - The oral microbiome, containing a vast number of bacteria, produces extracellular vesicles (EVs) that may influence how OLP develops, but their specific effects are not fully understood.
  • - Research shows that OLP lesions have heightened inflammation and activated STAT3 signaling, with EVs from certain harmful bacteria triggering inflammatory responses similar to OLP symptoms, suggesting that these EVs could play a key role in OLP's development.
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Mechanical energy harvesters made from soft and flexible materials can be employed as energy sources for wearable and implantable devices. However, considering how human organs and joints expand and bend in many directions, the energy generated in response to a mechanical stimulus in only one direction limits the applicability of mechanical energy harvesters. Here, we report carbon nanotube (CNT) sheets/an elastomer bilayer harvesting electrode (CBHE) that converts two-axis mechanical stimulation into electrical energy.

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We aimed to characterize the anti-obesity and anti-atherosclerosis effects of HY7601 and KY1032 using high-fat diet (HFD)-fed obese C57BL/6 mice. We divided the mice into control (CON), HFD, HFD with 10 CFU/kg/day probiotics (HFD + KL, HY7301:KY1032 = 1:1), and HFD with 10 CFU/kg/day probiotics (HFD + KH, HY7301:KY1032 = 1:1) groups and fed/treated them during 7 weeks. The body mass, brown adipose tissue (BAT), inguinal white adipose tissue (iWAT), and epididymal white adipose tissue (eWAT) masses and the total cholesterol and triglyceride concentrations were remarkably lower in probiotic-treated groups than in the HFD group in a dose-dependent manner.

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  • The study investigates the link between specific proteins in amniotic fluid and complications in pregnant women with early preterm prelabor rupture of membranes (PPROM), focusing on microbial invasion and inflammation in the amniotic cavity.
  • 111 women with PPROM had their amniotic fluid tested for various proteins to see if their concentrations correlated with conditions like microbial invasion or the risk of premature delivery.
  • Results showed that higher levels of certain proteins (such as IL-8 and MMP-8) are connected to increased risks of early labor and serious neonatal outcomes, suggesting that these proteins play crucial roles in the immune response to infection during pregnancy.
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Background: Hypertensive disorders of pregnancy (HDP) pose significant risks to both maternal and fetal health, contributing to global morbidity and mortality. Management of HDP is complex, particularly because of concerns regarding potential negative effects on utero-placental circulation and limited therapeutic options due to fetal safety. Our study investigates whether blood pressure monitoring through a mobile health (mHealth) application can aid in addressing the challenges of blood pressure management in pregnant individuals with HDP.

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Objectives: To determine the effects of cerclage on twin pregnancies.

Methods: A multicenter, retrospective, cohort study was conducted at 10 tertiary centers using a web-based data collection platform. The study population included twin pregnancies delivered after 20 weeks of gestation.

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Purpose: To determine the obstetric factors affecting the development of depressed skull fracture in neonates.

Materials And Methods: This was a retrospectively cohort study on neonates born between July 2016 and August 2021. Neonates diagnosed with depressed skull fractures within one week of birth through X-ray and/or brain ultrasonography were included, and their mothers' obstetric characteristics were reviewed.

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Objective: We aimed to determine whether the semi-quantitative metalloproteinase-8 (MMP-8) bedside test is a worthwhile indicator in reflecting the severity of of intra-amniotic inflammation (IAI) and in predicting adverse pregnancy outcomes.

Study Design: This retrospective cohort study comprised 76 singleton-pregnant women admitted to the Seoul National University Bundang Hospital with a diagnosis of preterm premature rupture of membranes (preterm PROM) between 20 weeks 0 days and 33 weeks 6 days of gestation who underwent trans-abdominal amniocentesis to confirm intra-amniotic infection by positive results for aerobic/anaerobic bacteria, fungi, and genital mycoplasma and evaluate lung maturity. The semi-quantitative MMP-8 rapid test kit employs a colourimetric assay to quantify MMP-8 levels in amniotic fluid (AF), expressing results from 0 to 100 percent.

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  • Corneal transplantation has a high failure rate (50-70%) in high-risk patients mainly due to immune rejection, highlighting the need for predictive biomarkers.
  • A study using proteomics analysis of serum extracellular vesicles (EVs) in a mouse model identified changes in EV profiles during the transplant process, particularly at day 7 post-transplant.
  • The analysis revealed distinct markers associated with rejection (higher levels of histocompatibility proteins in rejectors) and non-rejection (increased serum amyloid A2 in nonrejectors), suggesting these EV-based biomarkers could aid in predicting corneal allograft outcomes.
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Purpose: To determine whether various inflammatory-, angiogenic/anti-angiogenic-, and extracellular matrix remodeling-associated proteins in plasma, alone or in combination with conventional blood-based markers, can predict intra-amniotic inflammation and/or microbial invasion of the amniotic cavity (IAI/MIAC) in women with spontaneous preterm labor (PTL).

Methods: A total of 193 singleton pregnant women with PTL (23-33 weeks) were included in this retrospective cohort study. Plasma samples were obtained at the time of amniocentesis.

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Problem: To assess the potential of five inflammatory and six angiogenic/antiangiogenic plasma proteins for predicting imminent spontaneous preterm delivery (SPTD; ≤14 days of sampling), microbial invasion of the amniotic cavity and/or intraamniotic inflammation (MIAC/IAI), and composite neonatal morbidity and mortality (CNMM) in women with early preterm premature rupture of membranes (PPROM).

Methods Of Study: This retrospective cohort study included 76 singleton pregnant women with early PPROM (23-30 weeks). Amniotic fluid obtained via amniocentesis was cultured for microorganism detection and assayed for interleukin-6 to define IAI (≥2.

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Background: Fat infiltration in muscle, called 'myosteatosis', precedes muscle atrophy, which subsequently results in sarcopenia. Myosteatosis is frequently observed in patients with nonalcoholic fatty liver disease (NAFLD). We have previously reported that retinoic acid receptor-related orphan receptor-α (RORα) regulates mitochondrial dynamics and mitophagy in hepatocytes, resulting in an alleviation of NAFLD.

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Aims: Hepatic fibrosis is a dynamic process characterized by the net accumulation of an extracellular matrix resulting from chronic liver injury such as nonalcoholic steatohepatitis. Activation of hepatic stellate cells (HSCs) plays a role in transdifferentiation of quiescent cells into fibrogenic myofibroblasts. We aimed to examine the function of retinoic acid receptor-related orphan receptor alpha (RORα) and its novel agonistic ligand, 1-(4-benzyloxybenzyl)-3-(2-dimethylaminoethyl)-thiourea (ODH-08) against activation of HSCs using hepatic fibrosis mouse models.

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