Publications by authors named "Sang-Hee Lee"

mPTP is a multi-protein complex that opens in mitochondria during cell death. Cisplatin-induced hearing loss is also known to be caused by mPTP opening. Thus, our study evaluated the protective effect of a novel mPTP inhibitor named DBP-iPT against cisplatin-induced hearing loss.

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Subterranean termites build complex underground tunnel networks to efficiently gather food. Empirical observations indicate specific individuals are dedicated to tunneling, rarely interchanging tasks. However, considering the limited tunneling energy of termite populations, it is reasonable to expect regular task shifts between fatigued and rested individuals to maintain continuous tunneling and optimize foraging.

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We announce the complete genome of strain PEC1003 belonging to ST7366, isolated from sewage water in Pakistan. This strain harbored a plasmid carrying various antibiotic resistance genes, including extended-spectrum β-lactamase (ESBL), , emphasizing the management and surveillance of ESBL-producing in the environment of developing countries.

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Article Synopsis
  • Poxviruses, like monkeypox, are linked to various infectious diseases, but the immune response mechanisms during their infection are not well understood.
  • Researchers studied the monkeypox virus envelope protein (A30L) and its core peptide (IAMP29) and found that they significantly activate the NLRP3 inflammasome in human monocytes by generating reactive oxygen species.
  • IAMP29 promotes glycolysis and enhances the immune response, helping fight non-tuberculous mycobacteria and showing potential therapeutic effects against leukemia cells through cell death processes.
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Cell survival in metazoans depends on cell attachment to the extracellular matrix (ECM) or to neighboring cells. Loss of such attachment triggers a type of programmed cell death known as anoikis, the acquisition of resistance to which is a key step in cancer development. The mechanisms underlying anoikis resistance remain unclear, however.

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Article Synopsis
  • 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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Maleic anhydride derivatives were evaluated as catalysts in -oxidation of various pyridine substrates using hydrogen peroxide (HO). Depending on the electronic properties of the pyridine substrates, pyridines with electron-donating groups reacted well with 2,3-dimethylmaleic anhydride (DMMA). In contrast, 1-cyclohexene-1, 2-dicarboxylic anhydride (CHMA) was most effective for electron-deficient pyridines.

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Article Synopsis
  • The overuse of β-lactam antibiotics has led to the development of resistance, particularly due to enzymes called β-lactamases, which hydrolyze these antibiotics.
  • Research focused on variants of the OXA-10 β-lactamase revealed three mutations (G157D, A124T, N73S) that significantly improved hydrolytic activity against ceftazidime, a broad-spectrum cephalosporin antibiotic.
  • The study shows how single amino acid changes can impact drug resistance and suggests that understanding these mutations can help improve existing drugs and aid in the creation of new β-lactam antibiotics.
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The emergence and spread of multidrug-resistance (MDR) pathogenic due to horizontal gene transfer of antibiotic resistance genes (ARGs) and virulence factors (VFs) is a global health concern, particularly in developing countries. While numerous studies have focused on major sequence types (STs), the implication of minor STs in ARG dissemination and their pathogenicity remains crucial. In this study, two strains (PEC1011 and PEC1012) were isolated from wild bird feces in Pakistan and identified as ST2178 based on their complete genome sequences.

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Mycobacteroides abscessus (Mabc) is a rapidly growing nontuberculous mycobacterium that poses a considerable challenge as a multidrug-resistant pathogen causing chronic human infection. Effective therapeutics that enhance protective immune responses to Mabc are urgently needed. This study introduces trans-3,5,4'-trimethoxystilbene (V46), a novel resveratrol analogue with autophagy-activating properties and antimicrobial activity against Mabc infection, including multidrug-resistant strains.

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This study explores the food transport efficiency (E) in a termite tunnel consisting of a main tunnel and a 2-segment loop tunnel through a model simulation. Simulated termites navigate between the main and loop tunnels through branching nodes (a, b, c, d) with associated probabilities (P1, P2, P3, P4). The loop tunnel locations (δ) are considered: near the nest (δ = 1), at the center of the main tunnel (δ = 2), and close to the food site (δ = 3).

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Avian eggshells exhibit excellent antimicrobial properties. In this study, we conducted simulation experiments to explore the defense mechanisms of eggshell membranes with regards to their physical features. We developed a mathematical model for the movement of microorganisms and estimated their penetration ratio into eggshell membranes based on several factors, including membrane thickness, microbial size, directional drift, and attachment probability to membrane fibers.

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Iris segmentation is an initial step for identifying the biometrics of animals when establishing a traceability system for livestock. In this study, we propose a deep learning framework for pixel-wise segmentation of bovine iris with a minimized use of annotation labels utilizing the BovineAAEyes80 public dataset. The proposed image segmentation framework encompasses data collection, data preparation, data augmentation selection, training of 15 deep neural network (DNN) models with varying encoder backbones and segmentation decoder DNNs, and evaluation of the models using multiple metrics and graphical segmentation results.

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The corpus luteum is a temporary endocrine gland formed in the ovary after ovulation, and it plays a critical role in animal reproductive processes. Tumors rely on the development of an adequate blood supply to ensure the delivery of nutrients and oxygen and the removal of waste products. While angiogenesis occurs in various physiological and pathological contexts, the corpus luteum and tumors share similarities in terms of the signaling pathways that promote angiogenesis.

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Human blood vessel organoids (hBVOs) offer a promising platform for investigating vascular diseases and identifying therapeutic targets. In this study, we focused on in vitro modeling and therapeutic target finding of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), the most common form of hereditary stroke disorder caused by mutations in the NOTCH3 gene. Despite the identification of these mutations, the underlying pathological mechanism is elusive, and effective therapeutic approaches are lacking.

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Background: Missing isoniazid (INH) resistance during tuberculosis (TB) diagnosis can worsen the outcomes of INH-resistant TB. The BD MAX MDR-TB assay (BD MAX) facilitates the rapid detection of TB and INH and rifampin (RIF) resistance; however, data related to its performance in clinical setting remain limited. Moreover, its effect on treatment outcomes has not yet been studied.

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Imaging is increasingly used to detect and monitor bacterial infection. Both anatomic (X-rays, computed tomography, ultrasound, and MRI) and nuclear medicine ([In]-WBC SPECT, [F]FDG PET) techniques are used in clinical practice but lack specificity for the causative microorganisms themselves. To meet this challenge, many groups have developed imaging methods that target pathogen-specific metabolism, including PET tracers integrated into the bacterial cell wall.

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Subterranean termites construct a network of tunnels beneath the ground, comprising a main tunnel and branch tunnels. While termites do not construct tunnels that turn back in a "U" shape, the intersection of main and branch tunnels often forms closed curved structures (a loop). The loop structure can have either a positive or negative effect on the transport efficiency of termites in food transportation.

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The urgent demand for effective countermeasures against metallo-β-lactamases (MBLs) necessitates development of novel metallo-β-lactamase inhibitors (MBLIs). This study is dedicated to identifying critical chemical moieties within previously developed MBLIs, and critical MBLs should serve as the target in MBLI evaluations. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), a systematic literature analysis was conducted, and the NCBI RefSeq genome database was exploited to access the abundance profile and taxonomic distribution of MBLs and their variant types.

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Article Synopsis
  • - The study aims to enhance PET imaging tools for detecting bacterial infections by developing a method to incorporate fluorine-18 labeled d-amino acids into bacterial cell structures using a high-throughput chemical biology technique.
  • - A novel radiotracer, [F]FB-sulfo-DBCO, was synthesized and tested, showing significantly higher uptake in bacteria treated with azide-modified d-amino acids compared to control groups.
  • - The findings suggest that the SPAAC-based radiotracer could improve the efficiency of screening d-amino acid-derived PET radiotracers for future imaging applications.
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Bisphosphonates are commonly used to treat osteoporosis. While renal toxicity is common with pamidronate and zoledronate, few ibandronate-related cases are reported. We describe a rare case of ibandronate-associated nephrotoxicity.

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Regulatory decisions for skin sensitization are now based on adverse outcome pathway (AOP) and integrated approaches to testing and assessment (IATA). Based on these, Organisation for Economic Co-operation and Development (OECD) guidelines on defined approaches for skin sensitization were adopted with a fixed data interpretation procedure (DIP). In the guidelines, "Defined Approaches" (DA) on skin sensitization uses the results from multiple information sources of in chemico, in vitro, and in silico data to achieve an equivalent predictive capacity as those of the animal tests.

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The aim of this study was to identify the anatomical feature of retaining ligament and fat compartment on the lower eyelid and infraorbital region using a histological method, and to investigate clear definitions for them which could be used generally in the clinical area. Eighteen specimens from eight fresh Korean cadavers were stained with Masson trichrome or hematoxylin and eosin. The ligamentous and fascial fibrous tissue were clearly identified.

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