Publications by authors named "Jeong-Ho Hwang"

Permafrost soils store vast amounts of organic carbon, and their thawing due to climate warming accelerates the release of carbon as methane and carbon dioxide, exacerbating global climate change. Understanding the distribution of greenhouse gases trapped in these soils and predicting their behavior upon thawing is essential for accurately modeling climate feedbacks. This study presents an integrated biogeochemical and microbial dataset from ~1.

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  • Some drugs, like PHMG-P, can have different toxicity effects in infants compared to adults, raising concerns from a past incident in 2011.
  • A study compared the toxicity of PHMG-P in young (7-10 days old) and adult (8 weeks old) mice, using controlled doses and assessing various health impacts after multiple exposures.
  • Both age groups showed significant lung toxicity and inflammation, but adult mice experienced noticeable weight loss, highlighting the need for further research on the long-term effects of early-life exposure to PHMG-P.
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The purpose of this study was to develop a monoclonal antibody (mAb) that can identify porcine dendritic cells (DCs) that have differentiated from bone marrow progenitor cells. Hybridoma technology was used to obtain mAbs, and bone marrow-derived DCs (BMDCs) were employed as immunogens for producing antibodies. The generated PD9-9 mAbs exhibited considerable reactivity towards porcine BMDCs with applications in flow cytometry and immunostaining.

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  • Decreasing blood donation rates have created a need for alternative sources, leading to the exploration of genetically engineered pig red blood cells (pRBCs), particularly triple-gene knockout (TKO) versions, for human transfusion compatibility.
  • In a study involving nonhuman primates, both wild-type (WT) and TKO-pRBC transfusions significantly improved red blood cell counts initially, but triggered the body's immune response, leading to rapid antibody production and liver function impairment.
  • While initial hematological improvements were noted on the first day post-transfusion, both pRBC types showed diminished circulation benefits and increased adverse reactions upon subsequent transfusions, raising concerns about their long-term efficacy in humans.
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Tuberculosis is a highly contagious disease caused by Mycobacterium tuberculosis (Mtb), which is one of the prominent reasons for the death of millions worldwide. The bacterium has a substantially higher mortality rate than other bacterial diseases, and the rapid rise of drug-resistant strains only makes the situation more concerning. Currently, the only licensed vaccine BCG (Bacillus Calmette-Guérin) is ineffective in preventing adult pulmonary tuberculosis prophylaxis and latent tuberculosis re-activation.

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Polyhexamethyleneguanidine phosphate (PHMG-P) is a biocide of guanidine family that can cause a fatal lung damage if exposed directly to the lungs. No reports exist regarding the toxicity of PHMG-P in neonatal animals. Therefore, this study aimed to determine PHMG-P toxicity in neonatal and 8-week-old mice after they were intranasally instilled with 1.

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The development of a cost-effective and accurate model for predicting the fatigue life of materials is essential for designing thermal power plants and assessing their structural reliability under operational conditions. This paper reports a novel energy-based approach for developing unified models that predict the fatigue life of boiler tube materials in ultra-supercritical (USC) power plants. The proposed method combines the Masing behavior with a cyclic stress-strain relationship and existing stress-based or strain-based fatigue life prediction models.

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ATB1651 gel is an antifungal drug candidate that enhances antifungal activity through substitution of several aryl rings, alkyl chains, and methyl groups. To ensure safety of use of ATB1651 gel, assessment of its potentially toxic side effects is necessary. In this study, we examined the repeated-dose toxicity of ATB1651 gel to Yucatan minipigs in accordance with the Good Laboratory Practice guidelines.

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Introduction: A reliable standard model is required to evaluate the efficacy of new drugs for companion animals, especially dogs. Canine atopic dermatitis (cAD), also known as allergic inflammatory skin disease, is a common condition. Currently, the house dust mite animal model is used in the research of cAD; however, this model exhibits significant individual variation and is difficult to standardize.

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Introduction: The global shortage of human blood for medical use has prompted the development of alternative blood sources. Nonhuman primates (NHPs) are commonly used owing to their physiological similarities to humans. The objective of the current study was to establish a controlled-blood-loss model in NHPs to explore their clinical and biological responses.

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Because there is a shortage of donor kidneys, researchers are exploring the possibility of using genetically modified pig kidneys for transplantation. Approaches involving knockout of carbohydrate genes or knockin of protective proteins have been attempted to determine the best gene modifications. In this study, we utilized ; and ; pigs for transplantation in nonhuman primates (NHPs).

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We investigated the cytotoxic effect of extract on Madin-Darby canine kidney (MDCK) cells. extract decreased the cell viability in a dose dependent manner (> 0.2%).

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  • Nosocomial infections, particularly affecting immunocompromised patients and those with medical devices, lack effective treatment strategies, highlighting the need for new approaches.
  • The research focused on EcpA, an extracellular protease crucial for biofilm formation, and aimed to discover inhibitors through structure-based virtual screening of natural ligands.
  • Five potential inhibitors were identified, showing strong binding energy to EcpA compared to a known inhibitor, and further stability analysis via molecular dynamics simulations confirmed their promise for future drug development.
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Blood vessel anastomosis by suture is a life-saving, yet time-consuming and labor-intensive operation. While suture-less alternatives utilizing clips or related devices are developed to address these shortcomings, suture anastomosis is still overwhelmingly used in most cases. In this study, practical "less-suture" strategies are proposed, rather than ideal "suture-less" methods, to reflect real-world clinical situations.

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  • - The immune systems of fetuses and young animals, like minipigs, are different from adult systems and can have varying responses to drugs, infections, and toxins, which highlights the importance of studying these differences for understanding disease risks.
  • - This study evaluated how the immune response of minipig fetuses and neonates reacts to stimulating agents, tracking parameters like cell types and cytokines at various developmental stages.
  • - Findings indicated that while lymphocytes were predominant in early gestation, neutrophil levels increased after birth, and certain cytokines and antibodies showed distinct patterns of production throughout development, confirming the fetal immune system's ability to respond to external stimuli.
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  • In South Korea, recent pig-to-primate kidney transplantation trials have shown initial results that are not yet sufficient for clinical application, with 30 surgeries conducted since 2011 at Konkuk University Hospital.
  • Researchers used genetically modified pigs to create organs and administered various immunosuppressants to prevent rejection in cynomolgus monkey recipients.
  • Although the average survival of the transplanted kidneys was 50 days, these results are noted to be the best recorded in the country, with ongoing efforts to enhance the outcomes and move towards clinical trials.
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  • The study examines the graft survival rates of full-thickness versus lamellar corneal xenotransplantation (XTP) using genetically engineered pigs in monkey recipients.
  • Results showed that lamellar XTP had significantly longer graft survival times compared to full-thickness XTP, with survival times of over 463 days versus 21 days, though not as high as previous lamellar studies.
  • The findings suggest that lamellar XTP avoids certain surgical complications associated with full-thickness XTP, but further research is needed to enhance graft survival rates and explore the impacts of different transgenic types.
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  • The study explores a nanotechnology approach to enhance the efficacy of remdesivir (RDS) as an antiviral treatment for SARS-CoV-2.
  • Researchers developed nanosized RDS-NLC, which improved the drug's effectiveness by increasing its bioavailability and cellular absorption.
  • The findings suggest that using NLC technology could be a promising strategy to enhance the antiviral properties of existing antiviral agents against SARS-CoV-2 and its variants.
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Sialyllactose (SL) is the most abundant acidic oligosaccharide in human breast milk and plays a primary role in various biological processes. Recently, SL has attracted attention as an excellent dietary supplement for arthritis because it is effective in cartilage protection and treatment. Despite the superior function of SL, there are few pharmacological studies of SL according to blood concentrations in arthritis models.

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Background: Given its similar structure and immune response to the human skin, porcine is a good model for dermal studies. Here, we sensitized ovalbumin (Ova) on minipig back skin for 2-4 weeks to induce chronic atopic dermatitis (AD).

Results: Gross observation, serum cytokine level, epidermal thickness, and epidermal integrity did not change after 4 weeks of Ova induction compared with the control, indicating AD modeling failure.

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Background: Bentonite, a montmorillonite clay, has been used as a classical remedy strategy for a long time. Recently, bentonite has been used as a raw material in cosmetic products because of its antibacterial and antioxidant properties. However, the therapeutic effect of bentonite on burn injuries has not yet been identified.

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We targeted three major species (, , and ) and evaluated their potential distributions using MaxEnt. The results showed that most Asian countries and northern Australia would be suitable for at least one of these pest species, and climate change will expand their habitat northward. All of the developed models were evaluated to be excellent with AUC, TSS, and OR10%.

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Background: Quantitative real time PCR (qPCR) is a powerful tool to evaluate mRNA expression level. However, reliable qPCR results require normalization with validated reference gene(s). In this study, we investigated stable reference genes in seven tissues according to four developmental stages in minipigs.

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To investigate insect and plant community relationships in riparian zones, terrestrial insect communities were compared in plant communities in the riparian zone of the Miho River, Korea. The sweep netting method was used to sample insects in 50 m transects in three herbaceous plant communities. In 2020, each plant community-, , and -was swept 100 times (50 sweeps × 2).

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Monocytes and macrophages that originate from common myeloid progenitors perform various crucial roles in the innate immune system. Stimulation with LPS combined with TLR4 drives the production of pro-inflammatory cytokines through MAPKs and NF-κB pathway in different cells. However, the difference in LPS susceptibility between monocytes and macrophages is poorly understood.

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