Publications by authors named "Jae-hyung Lee"

The circadian clock, an internal time-keeping system orchestrates 24 hr rhythms in physiology and behavior by regulating rhythmic transcription in cells. Astrocytes, the most abundant glial cells, play crucial roles in CNS functions, but the impact of the circadian clock on astrocyte functions remains largely unexplored. In this study, we identified 412 circadian rhythmic transcripts in cultured mouse cortical astrocytes through RNA sequencing.

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Background: Bone marrow stimulation (BMS), a procedure involving the creation of multiple channels in the greater tuberosity, is often performed alongside arthroscopic rotator cuff repair (ARCR). This study evaluated the effect of BMS on clinical and structural outcomes following ARCR.

Method: This study involved 204 patients with small, medium, and large full-thickness rotator cuff tears.

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Understanding the function of rare non-coding variants represents a significant challenge. Using MapUTR, a screening method, we studied the function of rare 3' UTR variants affecting mRNA abundance post-transcriptionally. Among 17,301 rare gnomAD variants, an average of 24.

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Sepsis, a leading cause of death worldwide, is a harmful inflammatory condition that is primarily caused by an endotoxin released by Gram-negative bacteria. Effective targeted therapeutic strategies for sepsis are lacking. In this study, using an in vitro and in vivo mouse model, we demonstrated that CM1, a derivative of the natural polyphenol chrysin, exerts an anti-inflammatory effect by inducing the expression of the ubiquitin-editing protein TNFAIP3 and the NAD-dependent deacetylase sirtuin 1 (SIRT1).

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Objective: Recent advancements in genome-based taxonomic classification propose the reclassification of certain Actinomyces species into new genera, including Schaalia. Schaalia odontolytica, the type species within this genus, is frequently found in the human oral cavity and has been associated with actinomycotic lesions. Currently, only two complete genomes of S.

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is generally considered beneficial for vaginal and digestive health. However, strains isolated from the oral cavity, especially from periodontitis lesions, have not been thoroughly studied. Here, we report the draft genome sequence of strain KHUD_007 isolated from the subgingival biofilm of a Korean patient with periodontitis.

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This study investigated how adipose tissue-derived mesenchymal stem cells (AT-MSCs) respond to chondrogenic induction using droplet-based single-cell RNA sequencing (scRNA-seq). We analyzed 37,219 high-quality transcripts from control cells and cells induced for 1 week (1W) and 2 weeks (2W). Four distinct cell clusters (0-3), undetectable by bulk analysis, exhibited varying proportions.

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Metagenomics and metatranscriptomics have enhanced our understanding of the oral microbiome and its impact on oral health. However, these approaches have inherent limitations in exploring individual cells and the heterogeneity within mixed microbial communities, which restricts our current understanding to bulk cells and species-level information. Fortunately, recent technical advances have enabled the application of single-cell RNA sequencing (scRNA-seq) for studying bacteria, shedding light on cell-to-cell diversity and interactions between host-bacterial cells at the single-cell level.

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Itch is a distinctive sensation that causes a specific affection and scratching reaction. The anterior cingulate cortex (ACC) has been linked to itch sensation in numerous studies; however, its precise function in processing pruritic inputs remains unknown. Distinguishing the precise role of the ACC in itch sensation can be challenging because of its capacity to conduct heterologous neurophysiological activities.

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Toxoplasma gondii is an intracellular protozoan parasite which can infect most warm-blooded animals and humans. Among the different mouse models, C57BL/6 mice are more susceptible to T. gondii infection compared to BALB/c mice, and this increased susceptibility has been attributed to various factors, including T-cell responses.

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Article Synopsis
  • Intradermal injection of keratin in mice promotes hair growth through its interaction with hair-forming cells.
  • Keratin application causes changes in the cell environment, leading to the condensation of dermal papilla cells and the formation of hair germ from outer root sheath cells.
  • The study highlights the importance of keratin from apoptotic cells in facilitating hair regeneration and offers insights into its role in tissue development.
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Sirtuin 1 (SIRT1) regulates cellular processes by deacetylating non-histone targets, including transcription factors and intracellular signalling mediators; thus, its abnormal activation is closely linked to the pathophysiology of several diseases. However, its function in infection is unclear. We found that SIRT1 contributes to autophagy activation via the AMP-activated protein kinase (AMPK) and PI3K/AKT signalling pathways, promoting anti- responses.

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Neuronal differentiation is highly coordinated through a cascade of gene expression, mediated via interactions between transacting transcription factors and cis-regulatory elements of their target genes. However, the mechanisms of transcriptional regulation that determine neuronal cell-fate are not fully understood. Here, we show that the nuclear transcription factor Y (NF-Y) subunit, NFYA-1, is necessary and sufficient to express the flp-3 neuropeptide gene in the IL1 neurons of C.

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Single imaging modality is still insufficient to evaluate the biological and anatomical structures of tumors with high accuracy and reliability. Generation of non-specific contrast, leading to a low target-to-background signal ratio, results in low imaging resolution and accuracy. Tumor environment-specific activatable multifunctional contrast agents need to maximize the contrast signals, representing a dual imaging-guided photothermal therapy (PTT) at target tumor sites.

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Background: Periodontitis is initiated or accelerated by dysbiosis of oral microorganisms. When hypertension is accompanied in periodontitis patients, changes of oral microbiota occur. Since there are no reports on antihypertensives, we assessed their effect on the oral microbial profiles of patients with periodontitis.

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Article Synopsis
  • - The study investigates the virulence and genetic differences of five wild-type strains of a pathogen known for colonizing dental biofilm and its association with periodontal diseases, particularly focusing on the role of exopolysaccharide (EPS) production.
  • - Surprisingly, a strain that does not produce EPS (Pi25611) was the least virulent, while another (Pi49046) that also lacks EPS was the most virulent, indicating that other factors contribute to virulence beyond EPS production.
  • - Genetic analyses revealed subtle variations in genes related to glycosylation and nutrient acquisition, suggesting these differences allow the strains to adapt and display diverse virulence patterns, which may enhance their ability to cause periodontal diseases.
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"Antibiotic tolerance" promotes the rapid subsequent evolution of "antibiotic resistance," however, it is often overlooked because it is difficult to distinguish between tolerant and susceptible organisms. A commensal bacterium S. anginosus subsp.

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  • Researchers have developed a new type of polymer micelles called copper(II) arsenite-integrated polymer micelles (CuAS-PMs) that can generate reactive oxygen species (ROS) to target cancer cells.
  • These micelles are made using a unique method that allows them to be stable in serum while releasing toxic components under specific conditions in cancer cells.
  • Animal studies show that CuAS-PMs effectively reduce tumor growth without causing harmful side effects, suggesting they could lead to new treatments that increase oxidative stress in cancerous tissues.
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Force control abilities are essential to interact with objects in our environments. However, there is a lack of evaluation tools and methods to test the force control abilities of the upper limb in evaluating the upper limb functions of prosthetic users. This study aimed to quantify upper limb isometric force control abilities in healthy individuals and prosthetic users using a custom-built handle with a 6-axis force/torque sensor and visual cue, namely an Upper Limb End-effector type Force control test device (ULEF).

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Background: We hypothesized in this study that the characteristics of retear cases vary according to surgeon volume and that surgical outcomes differ between primary and revision arthroscopic rotator cuff repair (revisional ARCR).

Methods: Surgeons performing more than 12 rotator cuff repairs (RCRs) per year were defined as high-volume surgeons, and those performing fewer than 12 RCRs were considered low-volume surgeons. Of the 47 patients who underwent revisional ARCR at our clinic enrolled in this study, 21 cases were treated by high-volume surgeons and 26 cases by low-volume surgeons.

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Human adipose-derived stem cells (hADSCs) are types of mesenchymal stem cells (MSCs) that have been used as tissue engineering models for bone, cartilage, muscle, marrow stroma, tendon, fat and other connective tissues. Tissue regeneration materials composed of hADSCs have the potential to play an important role in reconstituting damaged tissue or diseased mesenchymal tissue. In this study, we assessed and investigated the osteogenesis of hADSCs in both two-dimensional (2D) and three-dimensional (3D) culture conditions.

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Article Synopsis
  • The study highlights the unique challenges in treating autism spectrum disorders (ASD) due to their diverse causes and emphasizes the need for individualized research approaches.
  • Using human-induced pluripotent stem cell (iPSC) technology, researchers created neuron-like cells from an ASD patient with a mutation in the DSCAM gene, finding significant reductions in DSCAM levels and associated synaptic function genes.
  • The findings indicate that the DSCAM mutation may lead to ASD symptoms by impairing NMDA receptor function, confirmed by observations in both iN cells and a mouse model with similar genetic alterations.
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  • A labral retear can lead to unsuccessful shoulder surgery after an initial Bankart repair, particularly due to poor tissue conditions like capsular tears found during revision surgery.
  • This study aimed to evaluate the clinical outcomes and failure rates of revision surgeries based on whether patients had a healed labrum with capsular tears or labral retears without capsular issues.
  • Results indicated that out of 55 patients, those with capsular tears (group 1) had a significantly higher surgical failure rate (40%) compared to those with labral retears (group 2, 16.4%).
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