Publications by authors named "Kyoung Lee"

Tetrahydrobiopterin (BH4) expression is normally strictly controlled; however, its intracellular levels increase considerably following nerve damage. GTP cyclohydrolase I (GCH1) plays a crucial role in regulating BH4 concentration, with an upregulation observed in the dorsal root ganglion in cases of neuropathic pain. In this study, we aimed to develop and evaluate the clinical potential of an RNA interference-based adeno-associated virus (AAV) targeting GCH1 across various species to decrease BH4 levels and, consequently, alleviate neuropathic pain symptoms.

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Introduction: Coronavirus disease 2019 (COVID-19) alters the gut microbiome. This study aimed to assess the association between the disease severity of COVID-19 and changes in stool microbes through a seven-month follow-up of stool collection.

Methods: We conducted a multicentre, prospective longitudinal study of 58 COVID-19 patients and 116 uninfected controls.

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Article Synopsis
  • - Health screening is essential for individuals with disabilities due to their higher risk of preventable health issues, but there is a lack of understanding about the barriers they face when accessing screenings at healthcare facilities.
  • - The study reviewed 767 health records to examine the relationship between disability status and completion of health screenings, using statistical tests to identify differences in outcomes.
  • - Results indicated that both provider- and patient-related barriers contributed to incomplete screenings for individuals with disabilities, highlighting potential disparities they face in healthcare access, and further research is needed to explore these disparities in more depth.
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The growing risk of bacterial food poisoning due to global warming has necessitated the development of methods for accurate detection of food-poisoning bacteria. Despite extensive efforts to develop enhanced bacterial-capture methods, challenges associated with the release of the captured bacteria have limited the sensitivity of bacterial detection. In this study, thermo-responsive intelligent 3D nanostructures to improve food-poisoning bacterial analysis performance were fabricated by introducing a thermo-responsive polymer onto an urchin-like 3D nanopillar substrate (URCHANO).

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Ingestible devices (ID) provide a safe and noninvasive method for monitoring, diagnosing, and delivering drugs to specific sites in the human body, particularly within the gastrointestinal (GI) tract. However, the GI environment is highly acidic and humid, which can cause IDs to fail, and their corrosion in the acidic environment can cause leaching of toxic metal ions, thereby substantially limiting their long-term use. Thus, an efficient method is required to protect IDs, especially in the chemically and mechanically harsh GI environment.

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Real-time PCR assays are valuable tools for the rapid and accurate diagnosis of infectious diseases by identifying the nucleic acid sequences of pathogens. Here, we aimed to develop a recombinant plasmid-based standard for validating the sensitivity of different molecular diagnostic methods adopting the Jonstrup assay (J assay). Chimeric plasmid DNA (cpDNA) harboring various pathogen genes and the target site of the J assay was constructed.

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  • Multimorbidity negatively impacts health-related quality of life (HRQoL), particularly in patients with hypertension, but the exact reasons for this effect were not well understood.
  • This study explored how depressive symptoms and treatment burden act as mediators between the number of diseases a patient has and their HRQoL, analyzing differences between younger (<60 years) and older (60+) age groups.
  • Results indicated that while there is a direct link between disease burden and HRQoL, depressive symptoms play a larger mediating role than treatment burden in older patients, highlighting the need for age-specific interventions that address both factors.
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  • - Alport syndrome (AS) is a genetic kidney disorder caused by faulty COL4A3, COL4A4, and COL4A5 genes, leading to structural problems in the kidney's filtering membranes.
  • - Standard tests show vague results, but electron microscopy and type IV collagen staining help differentiate AS subtypes based on how the traits are inherited.
  • - Genetic testing, especially next-generation sequencing, is crucial as it can detect various mutations linked to AS, improving diagnosis and understanding.
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Soft peristaltic pumps, which use soft ring actuators instead of mechanical pistons or rollers, offer advantages in transporting liquids with non-uniform solids, such as slurry, food, and sewage. Recent advances in 3D printing with flexible thermoplastic polyurethane (TPU) present the potential for single-step fabrication of these pumps, distinguished from handcrafted, multistep traditional silicone casting methods. However, because of the relatively high hardness of TPU, TPU-based soft peristaltic pumps contract insufficiently and thus cannot perform as well as silicone-based ones.

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Background: Peri-implantitis, a plaque-associated pathological condition, has been on the rise with the increasing prevalence of dental implants. Despite its similarities to periodontitis, peri‑implantitis is difficult to control completely and has high relapse rates. This has sparked interest in exploring the pathogenic differences between the two conditions.

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  • Indoor air disinfection and ventilation are really important in hospitals, especially since COVID-19, but there wasn’t a fast way to remove viruses until now.
  • In this study, researchers tested different ways to clean the air in a small hospital room using UV light, special airflow, and a disinfectant spray.
  • They found that using UV light is the best way to kill viruses quickly, and suggested two methods: using just UV light for three minutes or using UV light with ventilation for three minutes and then venting for one more minute.
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  • - The use of lithium-ion batteries has surged, resulting in a growing number of spent batteries that pose significant environmental hazards due to abandoned cathode materials.
  • - Research reveals that a specific microorganism enhances the breakdown of spent LiNiCoMnO (NCM622) cathodes, leading to about 59% dissolution of pristine and 78% of spent material under low-oxygen conditions.
  • - The study indicates that microbial respiration not only affects the dissolution of harmful metals like Li, Ni, Co, and Mn but also suggests a potential method for sustainable recovery of valuable materials from discarded batteries through bioleaching.
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The increasing incidence of serious bacterial keratitis, a sight-threatening condition often exacerbated by inadequate contact lens (CLs) care, highlights the need for innovative protective technology. This study introduces a long-lasting antibacterial, non-cytotoxic, transparent nanocoating for CLs via a solvent-free polymer deposition method, aiming to prevent bacterial keratitis. The nanocoating comprises stacked polymer films, with poly(dimethylaminomethyl styrene-co-ethylene glycol dimethacrylate) (pDE) as a biocompatible, antibacterial layer atop poly(2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane) (pV4D4) as an adhesion-promoting layer.

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Background: People living with multimorbidity experience increased treatment burden, which can result in poor health outcomes. Despite previous efforts to grasp the concept of treatment burden, the treatment burden of people living with multimorbidity has not been thoroughly explored, which may limit our understanding of treatment burden in this population. This study aimed to identify the components, contributing factors, and health outcomes of treatment burden in people with multiple diseases to develop an integrated map of treatment burden experienced by people living with multimorbidity.

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  • Breast cancer (BC) exhibits complex genomic changes, but the impact of age and ethnicity on its molecular variations is still not well understood.
  • This study analyzed 843 BC patients in the K-MASTER program, focusing on differences between age groups and comparing findings with larger genomic databases to uncover ethnic disparities.
  • Key results included a higher frequency of specific mutations in older patients and significant differences in cancer subtypes across ethnic groups, leading to the development of a model to predict responses to platinum-based chemotherapy based on unique molecular signatures.
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Although extensive research on the mechanisms of photoconductivity enhancement in plasmonic Schottky structures has been conducted, the photoconductive interplay between hot electrons and trapping states remains elusive. In this study, we explored the photoconductive relationship between plasmonic hot-carriers and defect sites present in plasmonic architectures consisting of N-face n-GaN and Au nanoprisms. Our experimental results clearly verified that the plasmonic hot-electrons generated by interband transitions preferentially occupied deep trap levels in n-GaN, thereby considerably enhancing the photoconductivity through the combination of photogating and photovoltaic effects.

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  • - The study aimed to assess how well the updated 2023 guidelines from the International Association of Pancreatology (IAP) predict the need for surgery in patients with branch duct IPMN compared to the older IAP 2017 and European 2018 guidelines.
  • - Out of 663 patients reviewed, those who met the surgical criteria were significantly more accurately identified as having malignant IPMN under the new IAP 2023 guidelines, showing improvements in specificity, positive predictive value, and overall accuracy.
  • - The findings suggest that the updated 2023 guidelines can better predict malignancy risks, which may help lower the number of unnecessary surgical procedures for patients.
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Background: The increasing incidence of antibiotic-associated diarrhoea (AAD) is a serious health care problem. Dysbiosis of the gut microbiota is suspected to play a role in the pathogenesis of AAD, but its impact on the clinical outcomes of patients remains unclear.

Methods: Between May and October 2022, 210 patients with AAD admitted to a university hospital and 100 healthy controls were recruited.

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(SL) has been reported to exhibit anti-obesity effects in high-fat diet animal models, yet research into its mechanisms of action remains limited. Therefore, this study aimed to elucidate the mechanisms behind the anti-obesity activity of SL's 30% ethanol extract (SL30E) using 3T3-L1 cells in an in vitro setting. SL30E effectively mitigated the accumulation of lipid droplets and triacylglycerol.

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  • The study investigates potential biomarkers to predict how breast cancer patients might respond to a combination of immunotherapy and chemotherapy, focusing on tumor samples from the KORNELIA trial.
  • Researchers analyzed genomic and transcriptomic data to differentiate between patients who had good progression-free survival (PFS) and those who did not, looking at factors like tumor mutation burden (TMB) and TP53 mutations.
  • Findings suggest that higher TMB and specific immune cell profiles correlate with better treatment outcomes, offering insights for future research on treatment combinations and biomarkers in HER-2-negative metastatic breast cancer.
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Background: Age-dependent immune responses to coronavirus disease 2019 (COVID-19) vaccinations and breakthrough infections (BIs) in young and middle-aged individuals are unclear.

Methods: This nationwide multicenter prospective cohort study analyzed immune responses in participants of the ChAdOx1 (ChAd)-ChAd-mRNA vaccine group using cytometry by time-of-flight, anti-spike protein antibody (Sab) and anti-nucleocapsid antibody (Nab) titers, plaque reduction neutralization tests (PRNTs), and interferon-gamma (IFN-γ) release assays at various time points.

Results: We evaluated 347 participants with an average age of 38.

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Background: Neoadjuvant treatment (NAT) is standard for borderline resectable pancreatic cancer (BRPC). However, consensus is lacking on the optimal surgical timing for patients with BRPC undergoing NAT. The aim of this study was to investigate the long-term outcomes of patients undergoing NAT for BRPC and suggest optimal resection timing.

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IL17 signaling promotes pancreatic cancer development, yet the cell compartment responsible for the protumorigenic function of IL17 has not been defined. In this article, Castro-Pando and colleagues demonstrate that IL17/IL17 receptor A signaling in the pancreatic epithelium is critical for pancreatic cancer initiation and for establishing immunosuppression, whereas its signaling in the immune compartment is dispensable. This work provides an important mechanistic insight on the role of IL17 signaling and identifies a potential new immune checkpoint as a target in pancreatic cancer.

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Purpose: This study aimed to assess prognostic factors associated with combined hepatocellular-cholangiocarcinoma (cHCC-CCA) and to predict 5-year survival based on these factors.

Materials And Methods: Patients who underwent definitive hepatectomy from 2006 to 2022 at a single institution was retrospectively analyzed. Inclusion criteria involved a pathologically confirmed diagnosis of cHCC-CCA.

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Aims: Achilles tendon re-rupture (ATRR) poses a significant risk of postoperative complication, even after a successful initial surgical repair. This study aimed to identify risk factors associated with Achilles tendon re-rupture following operative fixation.

Methods: This retrospective cohort study analyzed a total of 43,287 patients from national health claims data spanning 2008 to 2018, focusing on patients who underwent surgical treatment for primary Achilles tendon rupture.

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