Publications by authors named "Ki-Tae Kim"

Unraveling the intricacies of osteoblast differentiation is crucial for advancing our comprehension of bone biology. This study investigated the complicated molecular events orchestrating osteoblast differentiation in MC3T3-E1 cells, a well-established in vitro culture model. Employing longitudinal RNA-sequencing analysis, we explored transcriptomic changes at the pivotal time points of 0, 1, 4, 7, 10, 14, and 21 days and categorized osteogenic differentiation into proliferation, matrix maturation, and mineralization stages.

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Microplastics (MPs) and nanoplastics (NPs) are pervasive pollutants that pose a hazard to human health. Although most previous studies have investigated the effects of MPs and NPs on digestion, oxidative stress, and inflammation in diverse models, the combined effect of plastic mixtures (PM) containing MPs and NPs on obesity and type 2 diabetes mellitus (T2DM) remains unknown. The hypothesis of our study is to verify the association between PM exposure and clinical features of metabolic diseases such as lipogenesis and insulin resistance.

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Background: Asthma is a chronic disease characterized by airway inflammation and obstruction. Treatment aims to control symptoms with minimal medication, using disease-controlling and symptom-relieving drugs. Inhaled steroids and beta2 agonists are common treatments; however, their long-term use can cause side effects.

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This study evaluated bioactive compounds in blood orange ( (L.) Osbeck) peel (BOP) as dietary additives. An 8-week feeding trial was conducted to investigate the effects of dietary supplementation on the growth performance, body composition, digestive enzyme activity, antioxidant capacity, and immune response of juvenile black rockfish.

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Citronellol is widely utilized in consumer products, including cosmetics, fragrances, and household items. However, despite being considered a relatively safe chemical, the health effects and toxicity mechanisms associated with exposure to high concentrations of citronellol, based on product content, remain inadequately understood. Here, we aimed to analyze the neurological effects of citronellol in zebrafish larvae using behavioral and histological analyses and elucidate the mechanisms underlying its neurotoxicity in vivo.

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Companion dogs are exposed to various chemicals. However, our understanding of the sources and pathways of chemical exposure in pets remains limited. In this study, we collected urine samples from 47 dogs and corresponding samples of the food they consumed to analyze the concentrations and dietary exposure to organophosphate flame retardants (OPFRs) and their metabolites (mOPFRs).

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Hedl. is a traditional medicinal plant in Korea, China, and Japan with known antioxidative, anti-inflammatory, anti-atherogenic, and anti-melanin activities. However, its anti-neuroinflammatory effects remain largely unknown.

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Article Synopsis
  • The study addresses the challenges in performing multi-omics analysis on single samples in zebrafish toxicology, presenting a new method for simultaneous metabolomics and lipidomics analysis of zebrafish embryos exposed to PFOS.
  • Using methyl tert-butyl ether (MTBE) for extraction, the researchers found that metabolite and lipid profiles were comparable to those from other solvents, demonstrating MTBE's effectiveness for multi-omics analysis while minimizing the number of embryos needed.
  • The findings reveal new insights into the neurotoxicity mechanisms of PFOS, highlighting alterations in behavior and the involvement of energy metabolism and sphingolipids, thus enhancing the understanding of toxic chemical effects on biomolecules.
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A novel staining dye, BEM ((1E,1'E)-1,1'-([2,2'-bithiophene]-5,5'-diyl)bis(N-(9-ethyl-9H-carbazol-3-yl)methanimine)) was synthesized for selective identification of polyamide (PA) micrplastics. BEM showed unique photophysical properties such as solvatochromism, intramolecular charge transfer (ICT), and aggregation induced emission (AIE) which were demonstrated through spectroscopic analysis and density functional theory (DFT) calculations. The optimal staining conditions for selective staining of PA by BEM were established by evaluating the staining efficiency according to the variation of the solvent compositions, concentrations of BEM, and staining durations.

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A multi-bioapplicable fluorescence chemosensor MQV, ((E)-2-methoxy-6-((2-(quinolin-2-yl)hydrazineylidene)methyl)phenol), was developed for sequential detection of Ga and pyrophosphate (PPi) ions. The addition of Ga and PPi to MQV in sequence strongly caused an off-on-off fluorescent response in PBS buffer/DMSO (8:2, v/v, pH 7.4).

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Phthalates and bisphenols (BPs) are well-known endocrine disrupting chemicals (EDCs) that are widely used in diverse consumer and personal care products. Despite their vulnerability, children are frequently exposed to phthalates and BPs in their surrounding environments. Although pre-school children spend most of their time in kindergarten, no comprehensive assessment of children' exposure to EDCs has been conducted according to the type of kindergarten.

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, a highly valued ectomycorrhizal fungus, requires a symbiotic relationship with pine trees for growth, complicating its cultivation. This study presents a comprehensive comparative genomic analysis of species, with a focus on . Genomic data from 19 assemblies representing 13 species were analyzed to identify genus-, species-, and strain-specific genes, revealing significant evolutionary adaptations.

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Plant pathogens secrete nuclear effectors into the host nuclei to modulate the host immune system. Although several nuclear effectors of fungal pathogens have been recently reported, the molecular mechanism of NLS-associated transport vehicles of nuclear effectors and the roles of NLS in transcriptional reprogramming of host immunity genes remain enigmatic. We previously reported the MoHTR1, a nuclear effector of the rice blast fungus, Magnaporthe oryzae.

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Article Synopsis
  • Gastric cancer is a major global health issue, and the effectiveness of immune checkpoint blockade therapies in treating metastatic gastric cancer is limited, underscoring the need for better predictive biomarkers for treatment outcomes.
  • In a multi-omics study analyzing tumor samples from patients treated with nivolumab, researchers found that ICB-sensitive tumors had strong interferon responses, while resistant tumors showed signs of epithelial-mesenchymal transition.
  • The study identified DCN as an important marker related to cancer-associated fibroblasts, linking high DCN expression with ICB resistance and poor patient prognosis, highlighting the importance of the tumor microenvironment in cancer therapy outcomes.*
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The common rust disease of maize is caused by the obligate biotrophic fungus Puccinia sorghi. The maize Rp1-D allele imparts resistance against the P. sorghi IN2 isolate by initiating a defense response that includes a rapid localized programmed cell death process, the hypersensitive response (HR).

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Although polyethylene terephthalate (PET) fibers are a representative form of plastic pollutants, studies on their toxicity are currently limited compared to other plastic types. Moreover, the effect of natural organic matter (NOM) on their toxicity has not been investigated. In this study, female and male adult zebrafish were exposed to synthesized PET fibers at concentrations of 0.

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Article Synopsis
  • Engineering tissue implants using human induced pluripotent stem cells (hiPSCs) shows potential for repairing large tissue losses but faces challenges in survival and integration.* -
  • The study introduces scalable vessel-integrated muscle-like lattices (VMLs) that feature dense hiPSC-derived myofibers and vessel-like microchannels, enhancing myofiber maturation and host integration.* -
  • This advanced bioprinting technology allows for the creation of larger, prevascularized muscle tissues, which successfully restore muscle function and promote healing in volumetric muscle loss injury models.*
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Lateral flow assays (LFAs) are a cost-effective and rapid colorimetric technology that can be effectively used for nucleic acid tests (NATs) in various fields such as medical diagnostics and biotechnology. Given their importance, developing more diverse LFAs that operate through novel working mechanisms is essential for designing highly selective and sensitive NATs and providing insights for designing various practical point-of-care testing (POCT) systems. Herein we report a new type of lateral flow assay (LFA) based on fluorescein-switching, enabled by nucleic acid-templated photooxidation of reduced fluorescein by riboflavin tetraacetate (RFTA).

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Background: Cell wall integrity (CWI) is crucial for fungal growth, pathogenesis, and adaptation to extracellular environments. Calcofluor white (CFW) is a cell wall perturbant that inhibits fungal growth, yet little is known about how phytopathogenic fungi respond to the CFW-induced stress.

Results: In this study, we unveiled a significant discovery that CFW triggered the translocation of the transcription factor CgCrzA from the cytoplasm to the nucleus in Colletotrichum gloeosporioides.

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Article Synopsis
  • This study investigates the genes involved in the early developmental stages of the East Asian common octopus (Octopus sinensis) through RNA sequencing.
  • Researchers identified 5,468 differentially expressed genes (DEGs) between hatched paralarvae and those 25 days post-hatching, revealing important factors affecting growth and development.
  • The findings highlight key genes linked to processes like transmembrane transport and lipid biosynthesis, offering insights for improving octopus production and understanding their survival mechanisms.
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Clinical bone-morphogenetic protein 2 (BMP2) treatment for bone regeneration, often resulting in complications like soft tissue inflammation and ectopic ossification due to high dosages and non-specific delivery systems, necessitates research into improved biomaterials for better BMP2 stability and retention. To tackle this challenge, we introduced a groundbreaking bone-targeted, lipoplex-loaded, three-dimensional bioprinted bilayer scaffold, termed the polycaprolactone-bioink-nanoparticle (PBN) scaffold, aimed at boosting bone regeneration. We encapsulated BMP2 within the fibroin nanoparticle based lipoplex (Fibroplex) and functionalized it with DSS for bone tissue-specific targeting.

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Background: In previous studies, denosumab, a RANKL human monoclonal antibody used in osteoporosis treatment, has shown efficacy in tendon healing after rotator cuff repair. This prospective study investigated the effects of denosumab on tendon healing, re-tear rates, and clinical outcomes post rotator cuff repair in women with osteoporosis.

Method: This was a prospective, observational study, employing propensity score matching for the control group.

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We have developed a fluorescent probe DBT-Cl ((E)-2-(2-(4-(diphenylamino)benzylidene) hydrazinyl)-N,N,N-trimethyl-2-oxoethan-1-aminium chloride) for ClO with an aggregation-induced emission (AIE) strategy depending on solvent polarity. DBT-Cl possessed a prominent solvatochromic emission property with intramolecular charge transfer (ICT) from the TPA (triphenylamine) to the amide group, which was studied by spectroscopic analysis and DFT calculations. These unique AIE properties of DBT-Cl led to the recognition of ClO with high fluorescent selectivity.

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Heat-treated nF1 (HT-nF1) increases immune cell activation and the production of various immunomodulators (e.g., interleukin (IL)-12) as well as immunoglobulin (Ig) G, which plays an important role in humoral immunity, and IgA, which activates mucosal immunity.

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