2,412 results match your criteria: "College of Natural Science[Affiliation]"

The therapeutic effect of DX2 inhibition in nicotine-induced lung cancer progression.

Mol Ther Oncol

December 2024

Department of Molecular Biology, College of Natural Science, Pusan National University, Busan 46241, Republic of Korea.

Alternative splicing products of AIMP2 and AIMP2-DX2 (DX2) have been reported to be associated with human lung cancer. In fact, DX2 expression is elevated in human lung cancers, and DX2 transgenic mice also develop lung cancer, in particular small cell lung cancer (SCLC). However, the mechanism by which DX2 is induced during cancer progression has not been clearly elucidated.

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Silicon (Si) supplementation permits plants to better deter infection. Supplementing hydroponically propagated with 1 mM potassium silicate (KSiO) reduced necrotic lesion development on detached leaves by both and . Previously, a family of Si-induced genes was identified in .

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Pentagonal Symmetry in Aperiodic Cyclic Multiply Twinned Nano- and Mesodiamonds.

J Phys Chem A

October 2024

Department of Chemistry, College of Natural Science, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.

This Review provides the first comprehensive overview of the structure and properties of exotic -crystalline aperiodic cyclic multiply twinned nano- (10-100 ) and meso- (up to 1 ) diamond particles (MTPs) exhibiting pentagonal symmetry. It spans their independent experimental discoveries (1963, 1964, 1972, and 1983) and theoretical structural insights (1993) to recent advancements. The Review focuses on high-symmetry MTPs formed by the fusion of multiple cubic diamond fragments through [111] facets.

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Identification of acrolein as a novel diagnostic odor biomarker for 1,2,3-trichloropropane-induced hepatotoxicity in Sprague Dawley rats.

Toxicol Res

October 2024

Department of Biomaterials Science (BK21 FOUR Program)/Life and Industry Convergence Research Institute/Laboratory Animals Resources Center, College of Natural Resources and Life Science, Pusan National University, Miryang, 50463 Republic of Korea.

Article Synopsis
  • Body odor can indicate various diseases, but this study specifically aimed to identify odor biomarkers linked to chemical-induced liver damage in rats.
  • Researchers treated Sprague Dawley rats with different doses of 1,2,3-trichloropropane (TCP) and tracked changes in urine odors using gas chromatography-mass spectrometry (GC-MS).
  • They discovered significant increases in several odors, particularly acrolein, which correlated with liver toxicity indicators and expressions of related metabolic enzymes, suggesting acrolein could serve as a new diagnostic marker for liver damage from TCP exposure.
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In spin caloritronics, the spin-dependent Seebeck effect provides a method for significantly reducing Joule heating and achieving ultra-high integration density. Here, we investigate the electronic transport and spin thermoelectric properties of zigzag-edge antimonene nanoribbons (ZANRs) with different widths using first-principles calculations. The results show that the ZANRs exhibit an excellent spin-dependent Seebeck effect.

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Physcion Mitigates LPS-Induced Neuroinflammation, Oxidative Stress, and Memory Impairments via TLR-4/NF-кB Signaling in Adult Mice.

Pharmaceuticals (Basel)

September 2024

Division of Life Sciences and Applied Life Science (BK 21 Four), College of Natural Science, Gyeongsang National University, Jinju 52828, Republic of Korea.

Alzheimer's disease (AD) is the most predominant cause of dementia, considered a progressive decline in cognitive function that ultimately leads to death. AD has posed a substantial challenge in the records of medical science over the past century, representing a predominant etiology of dementia with a high prevalence rate. Neuroinflammation is a common characteristic of various central nervous system (CNS) pathologies like AD, primarily mediated by specialized brain immune and inflammatory cells, such as astrocytes and microglia.

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The Chronic Toxicity of Endocrine-Disrupting Chemical to : A Transcriptome and Network Analysis of TNT Exposure.

Int J Mol Sci

September 2024

Institute of Environmental Medicine for Green Chemistry, Department of Life Science, Biomedi Campus, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang-si 10326, Republic of Korea.

Article Synopsis
  • - The study investigates the chronic effects of the endocrine-disrupting chemical (EDC) trinitrotoluene (TNT) on aquatic organisms, highlighting its sources and the ongoing introduction of EDCs into ecosystems.
  • - Researchers performed experiments focusing on gene expression and potential toxicological impacts, discovering that TNT negatively affects the signaling pathways crucial for oocyte maturation and early development in aquatic species.
  • - Utilizing advanced bioinformatics techniques, the study constructs networks to illustrate the molecular effects of TNT exposure, contributing to a better understanding of how EDCs disrupt aquatic ecosystems at the gene level.
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The present study aimed to identify nutrients (UPLC-PDA-ESI-MS/MS, HPLC-RI method) and biological activities (antioxidant activity to reduce Fe and ABTS, pancreatic lipase inhibitory effect, α-amylase, and α-glucosidase, anti-bacterial) of 14 highbush blueberries (Vaccinium corymbosum L.) cultivars (Northern type) as well as a principal component analysis (PCA) to assess the variation of these properties in the context of biodiversity. Most of the cultivars in this research have been first presented in this paper.

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Trophic niche overlap in coralline algae- and coral-dominated rocky-bottom subtidal communities.

Mar Pollut Bull

November 2024

School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea. Electronic address:

We investigated trophic structures in rocky subtidal ecosystems transitioning from canopy-forming to barren states across coastlines with varying oceanographic conditions. We examined stable isotopes and functional traits of common invertebrate and fish taxa to understand the food-web consequences. We hypothesized that resource exploitation patterns of functional guilds would result in distinct isotopic niches, defining trophic diversity and niche.

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Dendrimer nanoclusters loaded with gold nanoparticles for enhanced tumor CT imaging and chemotherapy an amplified EPR effect.

J Mater Chem B

October 2024

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Biological Science and Medical Engineering, Donghua University, Shanghai 201620, China.

The design of efficient multifunctional nanomedicines to overcome adverse side effects within biological systems and to achieve desirable computed tomography (CT) imaging and therapeutics of tumors remains challenging. Herein, we report the design of multifunctional nanoclusters (NCs) based on generation 3 (G3) poly(amidoamine) (PAMAM) dendrimers. In brief, G3 dendrimers were crosslinked with 4,4'-dithiodibutryic acid (DA) to generate disulfide-bond-containing dendrimer nanoclusters (DNCs), functionalized with 1,3-propane sultone (1,3-PS) to be zwitterionic, loaded with gold nanoparticles (Au NPs), and finally encapsulated with the drug doxorubicin (DOX).

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Engineered IRES-mediated promoter-free insulin-producing cells reverse hyperglycemia.

Front Endocrinol (Lausanne)

September 2024

State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, China.

Background: Endogenous insulin supplementation is essential for individuals with type 1 diabetes (T1D). However, current treatments, including pancreas transplantation, insulin injections, and oral medications, have significant limitations. The development of engineered cells that can secrete endogenous insulin offers a promising new therapeutic strategy for type 1 diabetes (T1D).

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Enhanced Activation in Phosphorous-Doped Silicon via Dual-Beam Laser Annealing.

Materials (Basel)

August 2024

Department of Physics, College of Natural Science, Daegu University, Gyeongsan 38453, Republic of Korea.

In this study, we conduct a comparative analysis of single-beam laser annealing (SBLA) and dual-beam laser annealing (DBLA) techniques for semiconductor manufacturing. In the DBLA approach, two laser beams were precisely aligned to simultaneously heat a phosphorus-doped silicon (Si) wafer. The main objective was to investigate the impact of the two annealing techniques on the electrical properties, crystalline structure, and diffusion profile of the treated phosphorus-doped Si at equivalent laser powers.

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As screening strategies employ better biomarkers and genetics to identify individuals at an increased risk of prostate cancer, there are currently no chemotherapeutic prevention strategies. With any chemoprevention strategy, the population will be younger and healthier; therefore, they will be less tolerant of side effects. This study translated findings from screening a natural product library and pre-clinical evaluation of curcumin (CURC) in combination with ursolic acid (UA) in prostate cancer models.

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In birds and insects, the female uptakes sperm for a specific duration post-copulation known as the ejaculate holding period (EHP) before expelling unused sperm and the mating plug through sperm ejection. In this study, we found that females shortens the EHP when incubated with males or mated females shortly after the first mating. This phenomenon, which we termed ale-nduced HP hortening (MIES), requires Or47b+ olfactory and ppk23+ gustatory neurons, activated by 2-methyltetracosane and 7-tricosene, respectively.

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Article Synopsis
  • This study aimed to analyze how various coping strategies relate to demographics, perceived stress levels, and hair cortisol among socioeconomically marginalized parents, as well as whether these coping strategies mediate the relationship between perceived stress and hair cortisol levels.
  • The research found that coping strategies varied with factors such as age, ethnicity, and education, and that parents tended to use more emotion-focused and avoidant coping when stress increased, while problem-focused coping did not change significantly.
  • The findings suggest that promoting adaptive emotion-focused coping strategies could help these parents better manage significant stressors related to food, housing, and income insecurity, although more research is needed for conclusive results.
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Evaluation of the impacts of turbidity on Gilgel-Gibe I reservoir storage, Omo-Gibe River Basin, Ethiopia.

Heliyon

August 2024

Meteorology and Hydrology Department, College of Natural Science and Technology, Wollega University, P.O. Box 395, Nekemte, Ethiopia.

Quantity and quality of the water held in the reservoir fluctuates due to turbidity alterations. The influence of turbidity on the amount of the water held in a reservoir was described explicitly in this research. This study aimed to evaluate turbidity's impact on the Gilgel-Gibe I reservoir water.

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Article Synopsis
  • The study shows that the female gametophyte in Arabidopsis plays a crucial role in the degeneration of the nucellar tip during ovule development.
  • By using genetic techniques to remove the female gametophyte, researchers were able to directly observe its effects on the rest of the ovule structure.
  • Findings indicate that while the female gametophyte is not essential for integument development, it is important for effective communication between the ovule's regions, leading to proper development.
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Monitoring of Nanodrug Accumulation in Murine Breast Cancer Metastases.

J Vis Exp

August 2024

Precision Health Program, Michigan State University; Department of Radiology, College of Human Medicine, Michigan State University;

Metastatic breast cancer is a devastating disease with very limited therapeutic options, calling for new therapeutic strategies. Oncogenic miRNAs have been shown to be associated with the metastatic potential of breast cancer and are implicated in tumor cell migration, invasion, and viability. However, it can be difficult to deliver an inhibitory RNA molecule to the tissue of interest.

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An inducible sphingosine kinase 1 in hepatic stellate cells potentiates liver fibrosis.

Biochem Pharmacol

November 2024

Department of Biomedical Science, College of Natural Science, Chosun University, Gwangju 61452, Republic of Korea; Department of Integrative Biological Sciences & BK21 FOUR Educational Research Group for Age-associated Disorder Control Technology, Chosun University, Gwangju 61452, Republic of Korea; Institute of Well-Aging Medicare & Chosun University G-LAMP Project Group, Chosun University, Gwangju 61452, Republic of Korea. Electronic address:

Hepatic stellate cells (HSCs) play a role in hepatic fibrosis and sphingosine kinase (SphK) is involved in biological processes. As studies on the regulatory mechanisms and functions of SphK in HSCs during liver fibrosis are currently limited, this study aimed to elucidate the regulatory mechanism and connected pathways of SphK upon HSC activation. The expression of SphK1 was higher in HSCs than in hepatocytes, and upregulated in activated primary HSCs.

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Molecular modification of chlorogenic acid via radiolysis with inhibitory effects on NO production.

Biosci Biotechnol Biochem

October 2024

Research division for Biotechnology, Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeongeup, Republic of Korea.

The molecular modification of chlorogenic acid (1) through γ-irradiation resulted in the formation of five new products: chlorogenosins A (2), B (3), C (4), D (5), and E (6) along with known compounds rosmarinosin B (7), protocatechuic acid (8), and protocatechuic aldehyde (9). The structures of the new compounds were elucidated using spectroscopic methods, including one-dimensional and two-dimensional nuclear magnetic resonance, high-resolution electrospray ionization mass spectroscopy, and circular dichroism spectroscopy. The potential anti-inflammatory activities of all the isolated compounds were determined by evaluating their inhibitory effects on the nitric oxide (NO) production in lipopolysaccharide-induced RAW 264.

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N121T and N121S substitutions on the SARS-CoV-2 spike protein impact on serum neutralization.

J Med Virol

September 2024

Department of Biological Science and Biotechnology, College of Natural Science, Chungbuk National University, Cheongju, South Korea.

The N121 site on the spike protein of SARS-CoV-2 is associated with heme and its metabolite, biliverdin, which can affect antibody binding. Both N121T and N121S substitutions have been observed in natural conditions and in a hamster model of dual infection with SARS-CoV-2 and Influenza A virus. Serum pseudotype neutralization assays against HIV-1 particles carrying wild-type, N121T, and N121S spikes with immune mouse and human sera revealed that N121T and N121S mutations had a greater impact on serum neutralization than biliverdin treatment.

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Association of Hand Grip Strength and Physical Fitness Parameters in Middle-Aged and Older Korean Men.

Asia Pac J Public Health

November 2024

Department of Kinesiology, College of Natural Science, Jeju National University, Korea.

The purpose of this study was to assess whether hand grip strength (HGS) could be an effective indicator to estimate other physical fitness parameters in middle-aged and older men using large population data. Data for this study were obtained from the National Fitness Center operated by the Korea Institute of Sport Science (n = 429 572). The following were excluded from this study: women aged 44 years or younger (n = 238 257), repeated measurement data (n = 130 466), and errors or missing data (n = 6 497).

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Editorial: Infectious Disease Epidemiology and Transmission Dynamics 2.0.

Viruses

July 2024

WHO Collaborating Center for Infectious Disease Epidemiology and Control, School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.

This Special Issue includes six original articles and one review article, all reflecting the unified scientific research endeavors and professional expertise for a shared objective, which were published between July 2023 and November 2023 [...

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