Publications by authors named "Sung-Keun Jung"

L. cultivar Dangjo (DJ), developed as a novel crop, possesses potential health benefits, such as reducing blood glucose levels. DJ contains flavonoid glycosides, bioactive compounds that have been found in various plants and have promising pharmacological effects.

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As chronic inflammation and oxidative stress cause various diseases in the human body, this study aimed to develop functional materials to prevent inflammation and oxidative stress. This study investigated the biological function and components of L. extract prepared using its leaves and branches (TCE).

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Although hair loss contributes to various social and economic, research methods for material development are currently limited. In this study, we established a research model for developing materials for hair growth through the regulation of -catenin. We confirmed that 100 nM tegatrabetan (TG), a -catenin inhibitor, decreased the proliferation of human hair follicle dermal papilla cells (HFDPCs) at 72 h.

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Article Synopsis
  • Hydrothermal pretreatment is a safe method for producing microfibrillated cellulose (MFC), but leftover hemicellulose can change its properties.
  • The study explored how different centrifugation times affect the removal of hemicellulose and the quality of MFC, finding that 10-30 minutes of centrifugation fully removed hemicellulose and enhanced MFC characteristics.
  • Advanced imaging showed that the best MFC sample (after 30 minutes of centrifugation) had thin, long fibers, which improved its dispersibility, especially when autoclaved for further treatment.
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The main cause of inflammatory bowel disease (IBD) is abnormal intestinal permeability due to the disruption of the tight junction of the intestinal barrier through a pathogen-mediated inflammatory mechanism and an imbalance of the gut microbiota. This study aimed to evaluate whether 2-ketoglutaric acid alleviated permeability dysfunction with tight junction localization, activated the transforming growth factor beta-activated kinase 1 (TAK1) inflammation pathway, and regulated the homeostasis of the intestinal microbiome in vitro and in vivo IBD model. Our findings revealed that 2-ketoglutaric acid significantly suppressed abnormal intestinal permeability, delocalization of tight junction proteins from the intestinal cell, expression of inflammatory cytokines, such as TNF-α, both in vitro and in vivo.

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Considering the emergence of various infectious diseases, including the coronavirus disease 2019 (COVID-19), people's attention has shifted towards immune health. Consequently, immune-enhancing functional foods have been increasingly consumed. Hence, developing new immune-enhancing functional food products is needed.

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Although various hair health medicines have been developed and are used today, additional safe and effective natural hair growth therapies still need to be developed. var. (Hiern) Leenh.

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Although sinapic acid is found in various edible plants and has been shown to have anti-inflammatory properties including colitis, its underlying mechanism and effects on the composition of the gut microbiota are largely unknown. We aimed to identify an early response kinase that regulates the localization of tight junction proteins, act at the onset of the inflammatory response, and is regulated by sinapic acid. Additionally, we analyzed the effects of sinapic acid on the homeostasis of the intestinal microbiome.

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Rice bran, a by-product of rice milling, is abundant in bioactive molecules and is highly recognized for its health-promoting properties, particularly in improving metabolic conditions. Building on this knowledge, we aimed to optimize the extraction conditions to maximize the functional efficacy of rice bran extract (RBE) and further validate its impact on lipid metabolism. We found that the optimized RBE (ORBE) significantly suppressed high-fat diet-induced weight gain, hyperlipidemia, and hepatosteatosis in mouse models.

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Due to the continuous increase in patients with androgenetic alopecia (AGA) and psychological disorders such as depression and anxiety, the demand for hair loss treatment and effective hair growth materials has increased. (Gaertn.) Roxb.

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Microbial fermentation is often used to improve the functionality of plant-based food materials. Herein, we investigated changes in the physicochemical and functional properties of cabbage during yeast fermentation to develop new products using fermented cabbage. Among the 8 types of food-grade yeast, both and fermented 10% cabbage powder solution (w/w) the most effectively, leaving no soluble sugars after 12 h of fermentation.

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Inflammatory bowel disease (IBD) is continuously increasing globally and caused by intestinal barrier dysfunction. Although protocatechuic acid (PCA) has a protective effect on colitis, the molecular mechanisms underlying its contribution to intestinal barrier function remain unknown. Transepithelial electrical resistance (TEER) and FITC-dextran permeability measurements reveled that PCA suppresses lipopolysaccharide (LPS) and tumor necrosis factor (TNF)-α-induced increase in intestinal permeability; zonula occludens (ZO)-1 and claudin-2 redistribution was also suppressed in the epithelial cell membranes of differentiated Caco-2 cells.

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The skin protects our body; however, it is directly exposed to the environment and is stimulated by various external factors. Among the various environmental factors that can threaten skin health, the effects of ultraviolet (UV) and particulate matter (PM) are considered the most notable. Repetitive exposure to ultraviolet and particulate matter can cause chronic skin diseases such as skin inflammation, photoaging, and skin cancer.

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Article Synopsis
  • Microfibrillated cellulose (MFC) is a versatile material with significant uses in the food and cosmetics sectors, noted for its strong physiochemical properties.
  • The study developed high-solid microfibrillated cellulose (HMFC) through centrifugation, resulting in a concentration five times greater than regular MFC while maintaining similar dispersion qualities.
  • HMFC demonstrated antioxidant activity, reduced inflammation in macrophages, and inhibited certain skin cell signaling pathways related to UV-induced damage, indicating its potential as an ingredient in anti-inflammatory and antioxidant skincare products.
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The skin, which is the largest organ of the human body, is in direct contact with pollutants in the surrounding atmosphere. Meanwhile, 1-nitropyrene (1-NP), the most abundant nitro-polycyclic aromatic hydrocarbon found in particulate matter, is known to have carcinogenic effects; however, studies on its toxicity in human and canine skin are still needed. In this study, we investigated 1-NP-induced apoptosis and inflammatory pathways in HaCaT cells.

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In this study, it was evaluated the effect of freeze-dried powder of L. cv. DANGJO (DJ) on ameliorating hyperglycemia in type 2 diabetes rat model induced by high-fat diet (HFD) and streptozotocin (STZ).

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Acute or repetitive exposure to ultraviolet (UV) cause disruptions to the skin barrier and subsequent inflammatory skin disease. 4-phenylpyridine (4-PP) is a constituent of Brassica campestris L. ssp.

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The skin acts as the primary defense organ that protects the body from the external environment. Skin cancer is one of the most common cancers in the world. Skin carcinogenesis is usually caused by cell degeneration due to exposure to ultraviolet (UV) radiation, which causes changes in various signaling networks, disrupting the homeostasis of single skin cells.

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Lactic acid is mainly used to produce bio-based, bio-degradable polylactic acid. For industrial production of lactic acid, engineered can be used. To avoid cellular toxicity caused by lactic acid accumulation, pH-neutralizing agents are used, leading to increased production costs.

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Abiotic stress induces the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) in plants, which consequently enhances ethylene production and inhibits plant growth. The bacterial ACC deaminase enzyme encoded by the gene reduces stress-induced ethylene production and improves plant growth in response to stress. In this study, overexpression of in ('Mirage Rose') significantly reduced expression of the ethylene biosynthesis gene ACC oxidase 1 () and ethylene production relative to those in wild type (WT) under various abiotic stresses (cold, drought, and salt).

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Although various physiological activities of compounds obtained from have been reported, the effects of extract (PLE) on early atherosclerosis remain unclear. Therefore, in this study, we investigated the in vitro and in vivo antiatherosclerosis and in vitro antioxidant effects of PLE and its compounds. PLE suppresses the tumor necrosis factor (TNF)-α-induced capacity of THP-1 cells to adhere to human umbilical vein endothelial cells (HUVECs), vascular cell adhesion molecule (VCAM)-1 expression, and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling in HUVECs.

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Here, we compared the chemical properties and antioxidant effects of black pepper ( L.) and pink pepper ( L.).

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Wheat germ (WG) is a by-product of wheat milling and comprises many bioactive compounds. This study aimed to compare the antioxidant and antilipidemic effects of different WG extracts (WGEs) by analyzing candidate bioactive compounds such as carotenoids, tocopherols, γ-oryzanol, and biogenic amines by reversed-phase high-performance liquid chromatography. Antioxidant activity was determined using the ABTS, DPPH, and FRAP assays.

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Article Synopsis
  • * Whole-genome analysis revealed that B. coagulans IDCC 1201 does not possess harmful antibiotic resistance or toxigenic genes, and it showed no hemolytic activity while being susceptible to recommended antibiotics.
  • * The strain also demonstrates desirable probiotic properties, such as the ability to tolerate bile and adhere to intestinal surfaces, making it a safe choice for human health.
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