Publications by authors named "Hwal Yong Lee"

Article Synopsis
  • Aging research is still largely unexplored, prompting an investigation into the immune response characteristics of healthy male cynomolgus macaques across different age groups.* -
  • The study identified three distinct aging patterns in gene expression related to immune responses: increased expression linked to innate immunity causing chronic inflammation, and decreased expression linked to adaptive immunity affecting antibody diversity.* -
  • Findings suggest that the gene expression patterns in macaques reflect aging processes and correlate with human disease states, potentially aiding in future predictions of human health issues.*
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Severe fever with thrombocytopenia syndrome virus was first discovered in 2009 as the causative agent of severe fever with thrombocytopenia syndrome. Despite its potential threat to public health, no prophylactic vaccine is yet available. This study developed a heterologous prime-boost strategy comprising priming with recombinant replication-deficient human adenovirus type 5 (rAd5) expressing the surface glycoprotein, Gn, and boosting with Gn protein.

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Background In tandem stenoses, nonhyperemic pressure ratio pullback is the preferred method to fractional flow reserve (FFR), based on the assumption of stable resting coronary flow. This study aimed to evaluate temporal changes of coronary circulatory indexes in tandem stenoses before and after angioplasty for proximal stenosis. Methods and Results Coronary tandem stenoses were created by porcine restenosis model with 2 bare metal stents in the left anterior descending artery.

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In recent decades, many studies on the treatment and prevention of pancreatic cancer have been conducted. However, pancreatic cancer remains incurable, with a high mortality rate. Although mouse models have been widely used for preclinical pancreatic cancer research, these models have many differences from humans.

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Symptoms of Parkinson's disease (PD) caused by loss of dopaminergic neurons are accompanied by movement disorders, including tremors, rigidity, bradykinesia, and akinesia. Non-human primate (NHP) models with PD play an essential role in the analysis of PD pathophysiology and behavior symptoms. As impairments of hand dexterity function can affect activities of daily living in patients with PD, research on hand dexterity function in NHP models with chronic PD is essential.

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Article Synopsis
  • Clostridium perfringens is a common bacterium found in the environment and the intestines of warm-blooded animals, but its excessive growth can lead to serious diseases in both animals and humans due to toxin production.* -
  • A study successfully isolated 10 strains of C. perfringens from 126 captive cynomolgus monkeys, confirming that all isolates belonged to genotype A and produced alpha toxin, with only a few producing beta 2 toxin.* -
  • The isolates showed high susceptibility to β-lactam antibiotics, exhibited characteristics like double hemolysis and lecithinase activity, and 90% were capable of forming biofilms, which can contribute to antibiotic resistance.*
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Article Synopsis
  • The study explores how interactions between the nervous system and immune system contribute to the development of Parkinson's disease (PD) and potential treatment options.
  • Research with non-human primates revealed chronic infiltration of T lymphocytes in the brain and changes in microglial activation after exposure to a specific neurotoxin (MPTP), which mimics PD.
  • Findings highlight the role of CD4+ and CD8+ T lymphocytes in neuron loss and suggest that understanding these immune responses could lead to better prevention and therapy for PD.
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Embryo aggregation is a useful method to produce blastocysts with high developmental competence to generate more offspring in various mammals, but the underlying mechanism(s) regarding the beneficial effects are largely unknown. In this study, we investigated the effects of embryo aggregation using 4-cell stage embryos in developmental competence and the relationship of stress conditions in porcine early embryogenesis. We conducted aggregation using the well of the well system and confirmed that aggregation using two or three embryos was useful for obtaining blastocysts.

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Chronic inflammatory enteric diseases occur commonly in humans and animals, especially in captive bred macaques. However, information about the etiology of idiopathic chronic inflammatory diarrhea in cynomolgus monkeys is limited. In this paper, we reported the unusual case of idiopathic chronic diarrhea in a captive cynomolgus monkey based on microbial, imaging, and microbiome examinations.

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Pigs are often selected for large animal models including for neuroscience and behavioral research, because their anatomy and biochemistry are similar to those of humans. However, behavioral assessments, in combination with objective long-term monitoring, is difficult. In this study, we introduced an automated video tracking system which was previously used in rodent studies, for use with pig models.

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Mitochondria continuously fuse and divide to maintain homeostasis. An impairment in the balance between the fusion and fission processes can trigger mitochondrial dysfunction. Accumulating evidence suggests that mitochondrial dysfunction is related to neurodegenerative diseases such as Parkinson's disease (PD), with excessive mitochondrial fission in dopaminergic neurons being one of the pathological mechanisms of PD.

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Microorganisms play important roles in obesity; however, the role of the gut microbiomes in obesity is controversial because of the inconsistent findings. This study investigated the gut microbiome communities in obese and lean groups of captive healthy cynomolgus monkeys reared under strict identical environmental conditions, including their diet. No significant differences in the relative abundance of , and were observed between the obese and lean groups, but a significant difference in ( < 0.

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Successful production of transgenic pigs requires oocytes with a high developmental competence. However, cumulus-oocyte complexes (COCs) obtained from antral follicles have a heterogeneous morphology. COCs can be classified into one of two classes: class I, with five or more layers of cumulus cells; and class II, with one or two layers of cumulus cells.

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