338 results match your criteria: "Sciences and Research Institute[Affiliation]"

Background: In aquaculture, the secretions of cultured organisms contribute to the development of aquatic antibiotic resistance. However, the antibiotic-induced changes in fish feces remain poorly understood. This study aimed to assess the short-term dynamics of fecal microbiome and antibiotic resistance in juvenile rainbow trout (Oncorhynchus mykiss) upon antibiotic treatment and withdrawal period.

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We propose two thermodynamically consistent inertial spin models generalizing the inertial spin model for the ensemble of mechanical particles with spin. For the collective dynamics modeling consistent with an entropy principle, we use two modeling ideas based on Hamiltonian formulation and flocking formalism for the coupling of the inertial spin model and temperatures introduced by Ha and Ruggeri [Arch. Ration.

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Microbiome-based therapies for Parkinson's disease.

Front Nutr

November 2024

Department of Biochemistry, J.N. Medical College, Aligarh Muslim University, Aligarh, India.

The human gut microbiome dysbiosis plays an important role in the pathogenesis of Parkinson's disease (PD). The bidirectional relationship between the enteric nervous system (ENS) and central nervous system (CNS) under the mediation of the gut-brain axis control the gastrointestinal functioning. This review article discusses key mechanisms by which modifications in the composition and function of the gut microbiota (GM) influence PD progression and motor control loss.

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This study simultaneously measured the taxonomic diversity of bacterial communities in both seawater and PM aerosol samples collected from the Northern Pacific Ocean during a cruise covering 7724 km between 37°N 126°E and 58°N 179°E. The relative abundance of Proteobacteria, Cyanobacteria, and Firmicutes were found to be more prevalent in aerosol samples (39 ± 16 %, 5.1 ± 1.

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Article Synopsis
  • Researchers used computer predictions to design antiviral compounds targeting specific proteins (Nsps) in the SARS-CoV-2 virus responsible for mRNA maturation and immune evasion.
  • The compound Chromenephenylmethanone-1 (CPM-1), selected for its high specificity, was synthesized and tested, showing impressive results with 98.9% inhibition of the virus and no harmful effects on cells.
  • This study highlights the effectiveness of computational modeling in discovering and developing new antiviral drugs against COVID-19.
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Article Synopsis
  • * A study analyzed tissue samples from 11 patients with difficult-to-treat CHE, finding increased levels of key cytokines (IL-4, TNF-α, IFN-γ) compared to unaffected skin.
  • * Tofacitinib was administered to 15 patients, showing promising results with a mean improvement in eczema severity after 4 weeks, although some experienced side effects and relapses after stopping treatment.
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Stem cell homeostasis is pivotal for continuous and programmed formation of organs in plants. The precise control of meristem proliferation is mediated by the evolutionarily conserved signaling that encompasses complex interactions among multiple peptide ligands and their receptor-like kinases. Here, we identified compensation mechanisms involving the CLAVATA1 (CLV1) receptor and its paralogs, BARELY ANY MERISTEMs (BAMs), for stem cell proliferation in two Solanaceae species, tomato and groundcherry.

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Deep learning based ECG segmentation for delineation of diverse arrhythmias.

PLoS One

June 2024

Department of Mathematical Sciences and Research Institute of Mathematics, Seoul National University, Gwanak-gu, Seoul, South Korea.

Accurate delineation of key waveforms in an ECG is a critical step in extracting relevant features to support the diagnosis and treatment of heart conditions. Although deep learning based methods using segmentation models to locate P, QRS, and T waves have shown promising results, their ability to handle arrhythmias has not been studied in any detail. In this paper we investigate the effect of arrhythmias on delineation quality and develop strategies to improve performance in such cases.

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AKT is one of the overexpressed targets in nonsmall cell lung cancer (NSCLC) and plays an important role in its progression and offers an attractive target for the therapy. The PI3K/AKT/mTOR pathway is upregulated in NSCLC. Acridone is an important heterocycle compound which treats cancer through various mechanisms including AKT as a target.

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On the alternating target tracking of a point cloud on Riemannian manifolds.

Chaos

May 2024

Department of Mathematical Sciences and Research Institute of Mathematics, Seoul National University, Seoul 08826, Republic of Korea.

Article Synopsis
  • The study focuses on tracking a moving target using two different multi-agent systems built on Riemannian manifolds.
  • For asymptotic tracking, a smooth piecewise vector field is utilized for targets that switch positions, while for finite-time tracking, a piecewise non-smooth vector field in Euclidean space is used.
  • The research provides frameworks that outline the necessary conditions for achieving both types of tracking based on system parameters, target configurations, and initial data.
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Climate control on the channel morphodynamics of the Sittaung River, Myanmar.

Sci Rep

March 2024

School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, Seoul, Republic of Korea.

The spatio-temporal development of a meandering river is controlled by its channel morphodynamics. In regions of rapid channel evolution, understanding the driving factors of meander migration is crucial in forecasting the rate and extent of morphological change. Sediment supply and fluvial discharge are the primary influences on migration rate, however climate oscillations are also integral in indirectly regulating migration rate through their control of regional precipitation, as well as the monsoon season of sub-tropical Asia.

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Endosomal Toll-Like Receptors as Therapeutic Targets for Autoimmune Diseases.

Adv Exp Med Biol

March 2024

Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.

Nucleic acid (NA)-sensing Toll-like receptors (TLRs) reside in the endosomal compartment of innate immune cells, such as macrophages and dendritic cells. NAs transported to the endosomal compartment are degraded by DNases and RNases. Degradation products, including single-stranded DNA, oligoRNA, and nucleosides, are recognized by TLR7, TLR8, and TLR9 to drive the defense responses against pathogens.

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Oncolytic Peptide-Nanoplatform Drives Oncoimmune Response and Reverses Adenosine-Induced Immunosuppressive Tumor Microenvironment.

Adv Healthc Mater

October 2024

Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research and Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.

The application of oncolytic peptides has become a powerful approach to induce complete and long-lasting remission in multiple types of carcinomas, as affirmed by the appearance of tumor-associated antigens and adenosine triphosphate (ATP) in large quantities, which jumpstarts the cancer-immunity cycle. However, the ATP breakdown product adenosine is a significant contributor to forming the immunosuppressive tumor microenvironment, which substantially weakens peptide-driven oncolytic immunotherapy. In this study, a lipid-coated micelle (CA@TLM) loaded with a stapled oncolytic peptide (PalAno) and an adenosine 2A receptor (A2AR) inhibitor (CPI-444) is devised to enact tumor-targeted oncolytic immunotherapy and to overcome adenosine-mediated immune suppression simultaneously.

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Background: Alopecia areata (AA) presents with noncicatricial alopecia and has multifactorial etiology. Janus Kinase inhibitors (JAKibs) with potential efficacy and favorable side-effect profile are the first class of drugs to receive FDA approval in AA.

Objectives: Our primary objective was to assess the complete response rates to tofacitinib monotherapy in severe and recalcitrant AA, alopecia totalis (AT), and alopecia universalis (AU) patients using the latest percentage change in Severity of alopecia tool (SALT) score.

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This study examined the effectiveness of a multiple group membership intervention for reducing the negative effects of age-based stereotype threat (ABST) on older adults' objective memory performance and subjective memory concerns. Healthy older adults ( = 68) were randomly allocated to an ABST + threat-removal (ABST+TR) or ABST + active-control (ABST+AC) condition. After activating ABST, the ABST+TR condition completed a group-listing task and the ABST+AC condition completed a meal-listing task.

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A Case of Pediatric Leg-Length Difference After Tibial Fracture Predicted by Bone SPECT/CT.

Nucl Med Mol Imaging

February 2024

Department of Nuclear Medicine, Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Cyclotron Research Center, Molecular Imaging and Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital, 20, Geonjiro, Jeonju, Jeonbuk Republic of Korea.

An 11-year-old boy underwent a bone single-photon emission computed tomography/computed tomography (SPECT/CT) scan 3 months after fracturing his right tibia. The standardized uptake values (SUVs) of the growth plates in his right tibia were higher compared to those in the left tibia. One year later, the right leg was 10 mm longer than the left leg with higher SUVs in the right tibial growth plates.

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Composites comprising copper-doped zinc sulfide phosphor microparticles embedded in polydimethylsiloxane (ZnS:Cu-PDMS) have received significant attention over the past decade because of their bright and durable mechanoluminescence (ML); however, the underlying mechanism of this unique ML remains unclear. This study reports empirical and theoretical findings that confirm this ML is an electroluminescence (EL) of the ZnS:Cu phosphor induced by the triboelectricity generated at the ZnS:Cu microparticle-PDMS matrix interface. ZnS:Cu microparticles that exhibit bright ML are coated with alumina, an oxide with strong positive triboelectric properties; the contact separation between this oxide coating and PDMS, a polymer with strong negative triboelectric properties, produces sufficient interfacial triboelectricity to induce EL in ZnS:Cu microparticles.

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Investigation and drug design for novel molecules from natural products as inhibitors for controlling multiple myeloma disease using in-silico tools.

J Biomol Struct Dyn

January 2024

Department of Medical Laboratory Sciences, College of Health Sciences and Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, United Arab Emirates.

Article Synopsis
  • Multiple myeloma (MM) is a serious disease characterized by abnormal plasma cell growth and high mortality rates, prompting research for effective treatments.
  • A study investigated 100 natural ingredients for their ability to inhibit the IgH enzyme linked to MM, identifying Diospyrin and Parviflorone F as notable inhibitors, with Parviflorone F showing better binding stability in simulations.
  • Ultimately, Parviflorone F was recognized as a strong potential inhibitor of the IgH domain, warranting further research into its therapeutic applications for MM.
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Interplay of unit-speed constraint and singular communication in the thermodynamic Cucker-Smale model.

Chaos

December 2023

Department of Mathematical Sciences and Research Institute of Mathematics, Seoul National University, Seoul 08826, Republic of Korea.

We study collision avoidance resulting from unit-speed constraint and singular communication weight in a thermo-mechanical Cucker-Smale (TCS) flocking ensemble moving in a Euclidean space. The TCS model governs the flocking dynamics of the CS particles in the presence of a self-consistent temperature field. The issue of collision avoidance has been addressed in the realistic modeling of collective particle models, and it has been investigated in the CS and TCS models without unit-speed constraint.

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Prediction of leg-length discrepancy in pediatric femoral shaft fracture using bone SPECT/CT: A case report.

Medicine (Baltimore)

November 2023

Department of Nuclear Medicine, Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jounbuk National University Medical School and Hospital, Jeonju, Jeonbuk, South Korea.

Rationale: Children's bones are in the process of growing in both length and width. Therefore, evaluating whether fractures affect the growth plate or not is very crucial. However, even in cases of lower limb fractures where the growth plate remains unaffected, overgrowth or shortening of the affected limb are encountered.

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sp. nov., isolated from the phosphonate-amended seawater of the northwestern Pacific Ocean.

Int J Syst Evol Microbiol

November 2023

Microbial Oceanography Laboratory, School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, Seoul 08826, Republic of Korea.

A novel Gram-stain-negative, aerobic, rod-shaped bacterium, designated as HL-NP1, was isolated from the surface water of the northwestern Pacific Ocean after enrichment cultivation using the organic phosphorous compound of 2-aminoethylphosphonate. Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain belonged to the genus , with the highest similarity to 40Bstr34 (98.7 %).

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Genomic Analysis of Two Cold-Active Phages Isolated from the Continental Shelf in the Arctic Ocean.

Viruses

October 2023

Department of Biochemistry and Structural Biology, UT Health, San Antonio, TX 78229, USA.

Article Synopsis
  • Cold-active bacteriophages, which are viruses that infect bacteria at low temperatures (≤4 °C), were isolated from sediment cores in the western Arctic Ocean, particularly phages ACA1 and ACA2, which thrive at just 1 °C.* -
  • These phages display typical myovirus features and have nearly identical genome sizes of about 36,825-36,826 bp, indicating a shared gene content and the presence of temperate phage characteristics that may aid in their survival.* -
  • The study reveals that even though they infect distinct bacterial hosts, the lack of cross-infection is likely due to significant genetic divergence and highlights the previously unexplored diversity of P2-like phages in polar environments
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