Publications by authors named "Na-Yeon Kim"

The monitoring of pre-weaned calf behavior is crucial for ensuring health, welfare, and optimal growth. This study aimed to develop and validate a machine learning-based technique for the simultaneous monitoring of multiple behaviors in pre-weaned beef calves within a cow-calf contact (CCC) system using collar-mounted sensors integrating accelerometers and gyroscopes. Three complementary models were developed to classify feeding-related behaviors (natural suckling, feeding, rumination, and others), postural states (lying and standing), and coughing events.

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Purpose: This study aims to explore the factors influencing nursing professionalism among nursing students, focusing on the image of nurses, satisfaction with their major, and career metacognition.

Methods: We conducted a descriptive survey with 185 nursing students from D city and K region on June 10-30, 2024. Data were analyzed using IBM SPSS ver.

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The peptidyl-prolyl isomerase (PIN1) plays a vital role in cellular processes, including intracellular signaling and apoptosis. While oxidative stress is considered one of the primary mechanisms of pathogenesis in brain ischemic injury, the precise function of PIN1 in this disease remains to be elucidated. We constructed a cell-permeable PEP-1-PIN1 fusion protein and investigated PIN1's function in HT-22 hippocampal cells as well as in a brain ischemic injury gerbil model.

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  • - The study explores the stability and manipulation of 1D van der Waals materials, focusing on two specific examples: MoI and TaSeI, showing that individual atomic chains can be processed and stabilized.
  • - High-resolution imaging techniques confirm the existence of stable atomic chains of MoI at room temperature, while TaSeI allows for the creation of suspended chains using electron beams.
  • - The research includes ab initio calculations that validate the stability and cleavage energies of these 1D materials, demonstrating the feasibility of top-down processing methods at the atomic level.
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Deoxynivalenol (DON) is the most common mycotoxin contaminant of food or feed worldwide and causes disease in animals. Lauric acid (LA) is a medium-chain fatty acid useful for barrier functions such as antimicrobial activity in the intestine of monogastric animals. However, the molecular mechanisms by which lauric acid exerts its effects on the deoxynivalenol-exposed small intestine have not been studied.

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  • Hepatic stellate cells (HSCs) are key players in liver fibrosis, and the study investigates how CCCP, a mitochondrial uncoupler, affects mitophagy in these cells.
  • CCCP treatment leads to mitochondrial dysfunction in HSCs, evidenced by decreased mitochondrial function and increased reactive oxygen species (ROS), while also triggering mitophagy but disrupting its later stages due to lysosomal impairment.
  • The study found that CCCP elevates the fibrogenic marker plasminogen activator inhibitor-1 (PAI-1) in HSCs, which is linked to lysosomal dysfunction rather than changes in gene expression, suggesting that targeting CCCP-related pathways could be a potential strategy for treating liver fibrosis.
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Objectives: Menopausal symptoms severely impact women's quality of life (QoL). Digital health interventions provide an accessible, personalized alternative for managing menopausal symptoms. In this study, we validated the Menopause Assistant Manager (MAMA®; Hudit, Seoul, S.

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Objective: The tumor immune microenvironment in ovarian clear cell carcinoma has not been clearly defined. We analyzed the immunological changes from treatment-naive to recurrence to correlate them with clinical outcomes.

Method: We compared the changes in immune infiltration of advanced-stage ovarian clear cell carcinoma samples before treatment and at the time of recurrence via immunohistochemistry (Programmed Cell Death-ligand 1 (PD-L1), cluster of differentiation 8 (CD8+), forkhead box P3 (Foxp3+)), tumor-infiltrating lymphocytes (TIL), and next-generation sequencing (54 patients).

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Objectives: Therapeutic interventions are crucial for perimenopausal women, given the challenging physical and psychological symptoms they face. This study focused on the development and verification of the efficacy of a cognitive behavioral therapy (CBT) protocol designed specifically for Korean perimenopausal women.

Study Design: A CBT protocol for perimenopausal women was newly developed based on theory and evidence.

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  • The tumor microenvironment (TME) contains various immune cells, particularly tumor-associated macrophages (TAMs), which play roles in promoting cancer progression.
  • A mutated variant of IL-32θ found in breast cancer tissues has been shown to inhibit cancer cell migration and growth via specific intracellular mechanisms.
  • Recombinant human IL-32θ (rhIL-32θ) enhances the expression of M1 macrophage markers and suppresses M2 markers, indicating its role in macrophage polarization through the MAPK and NF-κB signaling pathways.
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Background: The intestinal epithelium performs essential physiological functions, such as nutrient absorption, and acts as a barrier to prevent the entry of harmful substances. Mycotoxins are prevalent contaminants found in animal feed that exert harmful effects on the health of livestock. Zearalenone (ZEA) is produced by the Fusarium genus and induces gastrointestinal dysfunction and disrupts the health and immune system of animals.

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The antiviral role of the tripartite motif-containing (TRIM) protein family , a member of the E3-ubiquitin ligase family, has recently been actively studied. Hepatitis B virus (HBV) infection is a major contributor to liver diseases; however, the host factors regulated by cytokine-inducible TRIM21 to suppress HBV remain unclear. In this study, we showed the antiviral efficacy of TRIM21 against HBV in hepatoma cell lines, primary human hepatocytes isolated from patient liver tissues, and mouse model.

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Atypical gaze patterns are a promising biomarker of autism spectrum disorder. To measure gaze accurately, however, it typically requires highly controlled studies in the laboratory using specialized equipment that is often expensive, thereby limiting the scalability of these approaches. Here we test whether a recently developed smartphone-based gaze estimation method could overcome such limitations and take advantage of the ubiquity of smartphones.

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  • Neural differentiation is key for understanding the nervous system and treating neurological disorders, but traditional methods can be slow and imprecise.
  • A new microfluidic chip using aligned microelectrodes was developed to improve the differentiation of human induced pluripotent stem cells (iPSCs) into functional neurons.
  • By applying electrical stimulation along with neurotrophic factors, researchers found a significant boost in neuron generation and synaptic interactions from iPSCs.
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The clinical utility of a type 2 diabetes mellitus (T2DM) polygenic risk score (PRS) in the East Asian population remains underexplored. We aimed to examine the potential prognostic value of a T2DM PRS and assess its viability as a clinical instrument. We first established a T2DM PRS for 5490 Korean individuals using East Asian Biobank data (269,487 samples).

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Objective: The aim of this study was to increase the treatment rate of perimenopausal women by providing evidence-based nonpharmaceutical treatments through developing scientific evidence-based sports therapy and verifying its effectiveness.

Methods: In a cross-over design, a total of 33 women were assigned to two different sequences of intervention: sports therapy and telephone intervention (n = 17) or telephone intervention and sports therapy (n = 16). A self-reported clinical symptom survey was conducted before and after the experimental and control periods using the following measures: the Menopause Rating Scale, Patient Health Questionnaire 9, and Patient Health Questionnaire 15.

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  • A new perspective reveals a communication system called the microbiome-gut-brain axis, linking the gut, microbiome, and central nervous system, impacting brain health and diseases.
  • Microbial metabolites or exosomes can cross barriers to influence the CNS, but the specific mechanisms remain unclear.
  • This research used a gut-brain axis chip with neurons from human stem cells, showing that microbial substances significantly affect neural growth and could offer new strategies for treating neurodevelopmental and neurodegenerative disorders.
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Background: Genetic variants can contribute differently to trait heritability by their functional categories, and recent studies have shown that incorporating functional annotation can improve the predictive performance of polygenic risk scores (PRSs). In addition, when only a small proportion of variants are causal variants, PRS methods that employ a Bayesian framework with shrinkage can account for such sparsity. It is possible that the annotation group level effect is also sparse.

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The widespread use of mobile devices and laptops has replaced traditional paper-based learning and the question of how the brain efficiency of digital tablet-based learning differs from that of paper-based learning remains unclear. The purpose of this study was to investigate the difference in brain efficiency for learning between paper-based and digital tablet-based learning by measuring activity in the prefrontal cortex (PFC) using functional near-infrared spectroscopy. Thirty-two subjects were randomly assigned to the paper-based learning or the digital tablet-based learning group.

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Aims: Protectin DX (PDX), a specialized pro-resolving mediator, is an important pharmaceutical compound with potential antioxidant and inflammation-resolving effects. However, the fundamental mechanism by which PDX's ameliorate chronic inflammatory diseases has not yet been elucidated. This study aims to evaluate the anti-inflammatory properties and PPARγ-mediated mechanisms of PDX in phorbal-12-mysristate-13-acetate (PMA)-stimulated human promonocytic U937 cells.

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Purpose: This study assessed health-related quality of life (HRQoL) of long-term breast cancer (BC) survivors diagnosed at early stages and compare with cancer-free, age-matched women.

Methods: The study population included BC survivors diagnosed with ductal carcinoma in situ (DCIS) or breast cancer stages I-II, who had undergone lumpectomy/mastectomy, with time since diagnosis ranging from 9 to 16 years. Survey was conducted at two tertiary hospitals in 2020.

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  • Many cancers are linked to excessive angiogenesis, and targeting this process with anti-angiogenic treatment can be effective against solid tumors.
  • This study focused on the compound MMPP, showing that it significantly inhibited angiogenic activities like cell migration and new blood vessel formation in various experimental models.
  • MMPP works primarily by binding to VEGFR2, enhancing its stability, and blocking its activity, which disrupts key signaling pathways involved in angiogenesis, ultimately demonstrating potential as a new anti-cancer treatment.
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In cancer treatment, multi-target approach has paid attention to a reasonable strategy for the potential agents. We investigated whether (E)-2-methoxy-4-(3-(4-methoxyphenyl) prop-1-en-1-yl) phenol (MMPP) could exert an anticancer effect by dual-regulating VEGFR2 and PPARγ. MMPP showed modulating effects in TNBC type (MDA-MB-231 and MDA-MB-468) and luminal A type (MCF7) breast cancer cell lines.

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Cancer is a leading cause of the death worldwide. However, the conventional cancer therapy still suffers from several limitations, such as systemic side effects, poor efficacy, and patient compliance due to limited accessibility to the tumor site. To address these issues, the localized drug delivery system has emerged as a promising approach.

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We hypothesized that the provision of rumen-inert fat (RIF) to growing cattle (9 to 13 mo of age) would affect the expression of genes involved in lipid metabolism and thereby affect the size and number of adipocytes of steers slaughtered at 30 mo of age. Thirty steers with an average initial body weight (BW) of 239 ± 25 kg were allocated to six pens, balanced for BW and genetic merit for marbling, and assigned to one of two treatment groups: control (only basal diet) or test diet (basal diet with 200 g of RIF per day, on an as-fed basis) for 5 mo. Biopsy samples of longissimus lumborum (LM) muscle were then collected for analysis of fatty acid composition and gene expression.

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