Publications by authors named "JeongAh Kim"

Acinetobacter baumannii is a multidrug-resistant opportunistic pathogen primarily associated with hospital-acquired infections. The bacterium can gain multidrug resistance through several mechanisms, including horizontal gene transfer. A CRISPR-Cas system including several Cas genes could restrict the horizontal gene transfer.

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L., a member of the Anacardiaceae family, is widely cultivated across the globe. The leaves of are renowned for their medicinal properties, attributed to the abundance of bioactive compounds.

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As COVID-19 has become endemic, SARS-CoV-2 variants are becoming increasingly diverse, underscoring the escalating importance of global genomic surveillance. This study analyzed 86,762 COVID-19 samples identified in the Republic of Korea from September 2022 to November 2023. The results revealed a consistent increase in the prevalence of the XBB variants following the dominance of BN.

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  • Affective disorders are linked to changes in circadian rhythms, particularly in the secretion patterns of serotonin (5-HT), which plays a crucial role in mood regulation.
  • This study investigates how the circadian nuclear receptor REV-ERBα influences the production of serotonin by regulating the enzyme tryptophan hydroxylase 2 (Tph2) in specific brain neurons.
  • The results show that manipulating REV-ERBα activity affects serotonin levels and associated mood behaviors in mice, highlighting a connection between circadian rhythms and mood regulation mechanisms in the brain.
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Purpose: To investigate whether preoperative ultrasonographic (US) features of the index cancer and metastatic lymph nodes (LNs) are associated with level II LN metastasis in N1b papillary rmfthyroid carcinoma (PTC) patients.

Materials And Methods: We enrolled 517 patients (mean age, 42 [range, 6-80] years) who underwent total thyroidectomy and lateral compartment LN dissection between January 2009 and December 2015. We reviewed the clinicopathologic and US features of the index cancer and metastatic LNs in the lateral neck.

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  • * Research utilizing human pluripotent stem cells showed that VPA exposure affects neural stem cell development in a dose-dependent manner, causing more cell death during anterior neural differentiation and inhibiting cell growth during posterior differentiation.
  • * Additionally, VPA exposure during posterior neural induction negatively impacts the morphogenesis of neural structures, indicating potential cytotoxic effects that could disrupt early embryonic neural development.
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The performance of home care globally is significantly impacted by the political reforms in the public and private sectors. This research investigated the Australian contexts of home care quality and the use of "brokerage" during times of change. The research utilised a qualitative post-structural approach to gather data about home care service provision through conducting semi-structured interviews of 10 Australian home care business leaders.

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  • Biological rhythms, especially circadian rhythms, are essential for regulating various processes in our bodies, helping us adapt to environmental changes.
  • The circadian clock, found in nearly all cells, controls gene regulation linked to mitochondrial functions like energy production and structure.
  • The review explores how mitochondrial rhythms may interact with or operate independently of the circadian clock, focusing on their cellular implications.
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  • The study aimed to create and assess AI algorithms for ultrasound microflow imaging to improve breast cancer diagnosis.
  • A dataset of 516 breast lesions was analyzed, with AI algorithms showing a higher accuracy (AUROC of 0.955-0.966) compared to traditional B-mode ultrasound (AUROC of 0.842).
  • Combining AI with B-mode ultrasound significantly enhanced diagnostic performance and reduced false positives from 87% to 13% for certain lesion categories.
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Mutations in genes encoding transcription factors inactivate or generate ectopic activities to instigate pathogenesis. By disrupting hematopoietic stem/progenitor cells, GATA2 germline variants create a bone marrow failure and leukemia predisposition, GATA2 deficiency syndrome, yet mechanisms underlying the complex phenotypic constellation are unresolved. We used a GATA2-deficient progenitor rescue system to analyze how genetic variation influences GATA2 functions.

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A web-based clinical simulation program, known as FIRSTACT (Feedback Incorporating Review and Simulation Techniques to Act on Clinical Trends), was designed to increase the efficacy of clinicians' actions in the recognition and immediate response to a patient's deterioration. This study, which was nested in a larger mixed method project, used ten focus groups ( = 65) of graduate, enrolled, registered nurses, associate nurse unit managers, and general managers/educators/coordinators from four different institutions to investigate whether nurses felt their practice was influenced by participating in either a face-to-face or web-based simulation educational programme about patient deterioration. The results indicate that individuals who were less "tech-savvy" appreciated the flexibility of web-based learning, which increased their confidence.

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Although WHO declared the end of the public health emergency for coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), XBB lineages continue to evolve and emerge globally. In particular, XBB.1.

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The ongoing COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has led to the emergency of various lineages through mutations and recombination. In the Delta lineage, we identified recombination events in the ORF1a gene, which divided the Delta sublineages into three different genotypes (Delta R1-R3). The regional distributions of Delta R1 and Delta R2 were not correlated, indicating that recombination occurred early in the Delta outbreak.

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  • Mitochondrial dysfunction plays a crucial role in chronic degenerative disorders, and immune responses triggered by mitochondrial DNA in the cytoplasm are significant.
  • Researchers created targeted systems to induce double-strand breaks in mitochondrial DNA, resulting in a notable decrease in mtDNA copy numbers and increased interferon production in specific cell types.
  • The study revealed that mitochondrial E3 ligase MARCH5 helps regulate immune responses by degrading active DNA-PKcs, preventing prolonged inflammation following mitochondrial damage.
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  • The Korea Disease Control and Prevention Agency (KDCA) is conducting genomic surveillance to track and analyze SARS-CoV-2 variants in South Korea using over 102,000 patient samples.
  • COVID-19 variant waves emerged first internationally and then spread domestically, with key variants including B.41 in 2020, Delta in 2021, and various Omicron sub-lineages in 2022.
  • The KDCA has been proactive in detecting new variants before widespread outbreaks, highlighting the need for ongoing monitoring to safeguard public health against emerging threats.
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Background: Coronavirus disease 2019 (COVID-19) has been declared a global pandemic owing to the rapid spread of the causative agent, severe acute respiratory syndrome coronavirus 2. Its Delta and Omicron variants are more transmissible and pathogenic than other variants. Some debates have emerged on the mechanism of variants of concern.

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  • - The development of fluorescent probes for mitochondria is common, but there's a need for less toxic options to better assess mitochondrial function.
  • - A new cyanine-based NIR fluorescent probe, called T2, selectively targets mitochondria and has low toxicity by influencing the redox balance inside cells.
  • - T2 also protects cortical neurons from cell death caused by oxidative stress, highlighting its potential as a safer imaging agent for mitochondria.
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Following the global emergence of the SARS-CoV-2 Alpha variant of concern (VOC) in 2020, the Delta variant triggered another wave in 2021. The AY.69 lineage, a Delta VOC, was particularly prevalent in Republic of Korea (South Korea) from May 2021 to January 2022, despite the synchronized implementation of vaccination programmes and non-pharmaceutical interventions (NPIs) such as social distancing.

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The Omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) began spreading rapidly in the community in November 2021, becoming the dominant variant in the Republic of Korea in 2022. Although its pathogenesis in healthy individuals was low, the severity and hospitalization rate was higher in the elderly and immunocompromised patients. We aimed to investigate the immunogenicity in acute and convalescent phases of breakthrough infection by Omicron in elderly individuals.

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Purpose: To describe the parapapillary choroidal microvasculature dropout (CMvD) in glaucomatous eyes without β-zone parapapillary atrophy (β-PPA) and compare its characteristics with that of CMvD with β-PPA.

Methods: Peripapillary choroidal microvasculature was evaluated on en face images obtained using optical coherence tomography angiography. CMvD was defined as a focal sectoral capillary dropout with no visible microvascular network identified in the choroidal layer.

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Objectives: Acinetobacter baumannii, a nosocomial pathogen, exhibits multidrug resistance and is a major concern worldwide. We therefore aimed to evaluate the genomic features of the clinical strain A. baumannii KBN10P05679 to elucidate its antibiotic resistance mechanisms and virulence factors.

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Acinetobacter baumannii is an opportunistic nosocomial pathogen that is responsible for various life-threating infections in immunocompromised hosts. We present the complete 3.93-Mb genome sequence of A.

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PARP inhibitors have been approved by the FDA for use in the treatment of patients with ovarian, breast, pancreatic, and prostate cancers. PARP inhibitors show diverse suppressive effects on PARP family members and PARP-DNA trapping potency. These properties are associated with distinct safety/efficacy profiles.

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