Publications by authors named "HyunJoon Kim"

Objective: To provide comparative evidence on the effectiveness of various lifestyle interventions on body composition management for preschool and school-aged children.

Methods: PubMed (Medline), Embase, CINAHL, and Web of Science were systematically searched for this network meta-analysis. Randomized controlled studies (RCTs) that included children aged 4-12 years with no physical or mental conditions; performed at least 1 type of lifestyle intervention; reported change in body mass index (BMI), BMI z-score, or body fat percentage (BFP); and were published between January 2010 and August 2023 were included.

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  • Coronaviruses need host proteases, like KLK5, to activate their spike proteins, enabling them to enter host cells and release their genetic material.
  • KLK5 is particularly effective among the KLK family, as it activates spike proteins of several human betacoronaviruses, including SARS-CoV-2, while other proteases like KLK12 and KLK13 have more specialized roles.
  • The study suggests that targeting KLK5 with compounds such as ursolic acid could be a potential treatment to inhibit coronavirus replication and reduce inflammation in infected individuals.
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Single-cell omics technologies have transformed our investigation of genomic, transcriptomic, and proteomic landscapes at the individual cell level. In particular, the application of single-cell RNA sequencing has unveiled the complex transcriptional variations inherent in cardiac cells, offering valuable perspectives into their dynamics. This review focuses on the integration of single-cell omics with induced pluripotent stem cells (iPSCs) in the context of cardiovascular research, offering a unique avenue to deepen our understanding of cardiac biology.

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The lower respiratory system serves as the target and barrier for beta-coronavirus (beta-CoV) infections. In this study, we explored beta-CoV infection dynamics in human bronchial epithelial (HBE) organoids, focusing on HCoV-OC43, SARS-CoV, MERS-CoV, and SARS-CoV-2. Utilizing advanced organoid culture techniques, we observed robust replication for all beta-CoVs, particularly noting that SARS-CoV-2 reached peak viral RNA levels at 72 h postinfection.

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Resistance band training (RBT) with functional electrical stimulation (FES) may be an effective exercise regimen for improving age-related motor impairments. This preliminary study investigated the potential effects of bimanual RBT with FES on upper limb motor functions in older adults. This study randomly assigned 22 elderly people to the bimanual RBT with FES (Bi-RBT+FES) group and the RBT without FES (Bi-RBT) group.

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  • mRNA vaccines translate into proteins that trigger strong immune responses but face distribution challenges due to required ultracold storage and professional administration.
  • Researchers developed an mRNA vaccine that can be taken orally and stored at 4 °C, making it more accessible for rural areas and developing countries.
  • The study successfully demonstrated that the new vaccine formulation, using specific polymers, provoked effective immune responses in mice and could serve as an efficient oral delivery system for mRNA vaccines.
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Biogenic amines are cellular components produced by the decarboxylation of amino acids; however, excessive biogenic amine production causes adverse health problems. The relationship between hepatic damage and biogenic amine levels in nonalcoholic fatty liver disease (NAFLD) remains unclear. In this study, mice were fed a high-fat diet (HFD) for 10 weeks to induce obesity, presenting early-stage of NAFLD.

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  • Intravesical instillation is a method used to deliver drugs directly into the bladder for treating urological issues, but it has challenges like pain and frequent clinic visits.
  • Researchers have developed a new biodegradable intravesical device made of PCL microcapsules and PDS sutures, which is easy to insert and remains in the bladder for up to four weeks.
  • The device allows for long-term drug release of medications like lidocaine and resiquimod, and a cost-effectiveness analysis shows it's a better option compared to traditional treatment methods.
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  • * Researchers have developed gas-entrapping materials (GEMs) inspired by culinary techniques to safely deliver CO directly to the gastrointestinal tract, offering a new treatment avenue for diseases like inflammatory bowel disease.
  • * In studies with rodents and swine, GEMs showed promising results, including reduction of liver damage, inflammation from colitis, and gut damage due to radiation, suggesting a significant potential for therapeutic use of CO.
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FTO and ALKBH5 are the two enzymes responsible for mRNA demethylation. Hence, the functional study of FTO has been focused on its mechanistic role in dynamic mRNA modification, and how this post-transcriptional regulation modulates signaling pathways. Here, we report that the functional landscape of FTO is largely associated with WNT signaling pathways but in a manner that is independent of its enzymatic activity.

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  • Diurnal fluctuations in biological mediators affect drug effectiveness, leading to advancements in chronotherapy, which focuses on timing drug delivery for optimal results.
  • A new implantable system has been developed that is battery-free, refillable, and can be controlled via a mobile app to administer drugs precisely when needed.
  • Tests show the system delivers bromocriptine effectively for glycemic control in diabetic rats and can also administer antihypertensive medication, potentially improving treatment for various chronic conditions.
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-Methyladenosine (m6A) is the most prevalent internal RNA modification and has a widespread impact on mRNA stability and translation. Methyltransferase-like 3 (Mettl3) is a methyltransferase responsible for RNA m6A modification, and it is essential for early embryogenesis before or during gastrulation in mice and zebrafish. However, due to the early embryonic lethality, loss-of-function phenotypes of Mettl3 beyond gastrulation, especially during neurulation stages when spatial neural patterning takes place, remain elusive.

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Adenosine N6-methylation (m6A) is one of the most pervasive mRNA modifications, and yet the physiological significance of m6A removal (demethylation) remains elusive. Here, we report that the m6A demethylase FTO functions as a conserved regulator of motile ciliogenesis. Mechanistically, FTO demethylates and thereby stabilizes the mRNA that encodes the master ciliary transcription factor FOXJ1.

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This study analyzed the psychological benefits of environmentally friendly edible insect restaurants, by proposing that three subdimensions of psychological benefits positively affect attitude. Attitude was hypothesized to play an important role in the formation of desire and two subdimensions of behavioral intentions: intentions to use and willingness to pay more. A research model was verified using responses from 419 respondents collected in Korea.

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There is a significant interest in designing therapeutic agents that can enhance ADCC and thereby improve clinical responses with approved antibodies. We recently reported the combination of an imidazoquinoline-based TLR7/8 agonist (522) with a monoclonal antibody improved ADCC in vitro and in vivo. In the present study, we tested several new small molecule TLR7/8 agonists that induce significantly higher cytokines compared to both the FDA-approved TLR7 agonist, imiquimod, and 522.

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RNA-protein interaction is central to post-transcriptional gene regulation. Identification of RNA-binding proteins relies mainly on UV-induced crosslinking (UVX) followed by the enrichment of RNA-protein conjugates and LC-MS/MS analysis. However, UVX has limited applicability in tissues of multicellular organisms due to its low penetration depth.

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The purpose of this study is to apply the concept of a green image in order to explore how to form behavioral intentions in the context of eco-friendly edible insect restaurants. This study analyzed 444 samples collected in South Korea in order to evaluate the theoretical model including 12 hypotheses. The data analysis results showed that a green image has a positive influence on attitude.

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Activated natural killer (NK) cells can kill malignant tumor cells via granule exocytosis and secretion of IFN-γ, a key regulator of the TH1 response. Thus, mobilization of NK cells can augment cancer immunotherapy, particularly when mediated through antibody-dependent cellular cytotoxicity (ADCC). Stimulation of toll-like receptor (TLR)7/8 activity in dendritic cells promotes pro-inflammatory cytokine secretion and costimulatory molecule upregulation, both of which can potentiate NK cell activation.

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The purpose of this study was to explore the antecedents and consequences of travelers' well-being perceptions in the context of a duty-free shop. For this, data were collected from 742 Chinese tourists who purchased goods at duty free shops while traveling in Korea within the past year using an online survey company's system in China. The results indicated that pragmatic, hedonic, and sociability experiences have a positive influence on travelers' well-being perceptions.

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The friction characteristics of single-layer h-BN, MoS, and graphene were systematically investigated via friction force microscopy measurements at various operational (e.g., normal force and sliding speed) and environmental (e.

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In recent years, there have been significant advances in the treatment of breast cancer resulting in remarkably high survival rates. However, treatment options for metastatic triple negative breast cancer (TNBC) are quite limited due to a lack of identifiable, unique markers. Using a phage display-based whole cell biopanning procedure, we developed two human antibodies that bind to tumor cells with a metastatic TNBC phenotype.

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The deuterium, a frequently used stable isotope in isotopic labeling for quantitative proteomics, could deteriorate the accuracy and precision of proteome quantification owing to the retention time shift of deuterated peptides from the hydrogenated counterpart. We introduce a novel three-plexed peptide "diethylation" using only C isotopologues of acetaldehyde and demonstrate that the accuracy and precision of our method in proteome quantification are significantly superior to the conventional deuterium-based dimethylation labeling in both a single-shot and multidimensional LC-MS/MS analysis of the HeLa proteome. Furthermore, in time-resolved profiling of Xenopus laevis early embryogenesis, our 3-plexed diethylation outperformed isobaric labeling approaches in terms of the quantification accuracy or the number of protein identifications, generating more than two times more differentially expressed proteins.

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Cancer vaccines composed of tumor-associated antigens (TAAs) and toll-like receptor (TLR) agonists have shown promising antitumor efficacy in preclinical studies by generating antigen-specific CD8 T cells, but translation of cancer vaccines to the clinic has been limited due to variables responses and development of resistance. The tumor microenvironment deploys various immune escape mechanisms that neutralize CD8 T cell-mediated tumor rejection. Therefore, we hypothesized that modulation of the tumor microenvironment can augment CD8 T cell activation and enhance therapeutic efficacy of cancer vaccines.

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Targeted drug delivery can significantly influence the efficacy of a drug. In the past decades, diverse drug-delivery technologies, including nano- and microparticles, co-crystals, and microneedles have been developed to maximize therapeutic efficacy and minimize undesired side effects of therapeutics. Nanoparticles-submicron-sized drug carriers-have been actively investigated for the delivery of antibiotics, nucleic acids, peptide/proteins, and chemotherapeutics.

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Synthetic imidazoquinoline-based toll-like receptor (TLR) 7/8 bi-specific agonists are promising vaccine adjuvants that can induce maturation of dendritic cells (DCs) and activate them to secrete pro-inflammatory cytokines. However, in vivo efficacy of these small molecule agonists is often hampered by their fast clearance from the injection site, limiting their use to topical treatments. In this study, we investigated the use of acidic pH-responsive poly(lactide-co-glycolide) (PLGA) nanoparticles for endo-lysosome specific release of 522, a novel TLR7/8 agonist.

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