Jiyoung Kim

Jiyoung Kim
Seoul National University | SNU · Center for Food and Bioconvergence

Doctor of Philosophy

About

45
Publications
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2,259
Citations

Publications

Publications (45)
Article
Full-text available
Sulforaphane, a potent dietary bioactive agent obtainable from cruciferous vegetables, has been extensively studied for its effects in disease prevention and therapy. Sulforaphane potently induces transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2)-mediated expression of detoxification, anti-oxidation, and immune system-modulati...
Article
The transient receptor potential vanilloid 1 (TRPV1) protein is a pain receptor that elicits a hot sensation when an organism eats the capsaicin of red chili peppers. This calcium (Ca2+)-permeable cation channel is mostly expressed in peripheral nervous system sensory neurons, but also in the central nervous system (e.g., hippocampus and cortex). P...
Article
Full-text available
Background: Multiple sclerosis (MS) is an immune-associated inflammatory disorder of the central nervous system and results in serious disability. Although many disease-modifying therapy drugs have been developed, these drugs have shown limited clinical efficacy and some adverse effects in previous studies, therefore, there has been reasonable nee...
Article
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We have previously reported a novel synthetic compound KMS99220 that prevented degeneration of the nigral dopaminergic neurons and the associated motor deficits, suggesting a neuroprotective therapeutic utility for Parkinson's disease. Microglia are closely associated with neuroinflammation, which plays a key role in the pathogenesis of neurodegene...
Article
Scope : Sulforaphane is an herbal isothiocyanate enriched in cruciferous vegetables. Here, we investigated whether sulforaphane modulates the production of amyloid‐β (Aβ) and tau, the two main pathological factors in Alzheimer's disease (AD). Methods and results : A triple transgenic mouse model of AD (3 × Tg‐AD) was used to study the effect of su...
Article
Non-alcoholic fatty liver disease (NAFLD) is an increasingly common chronic liver disease worldwide. Sphingolipids are a family of lipids that play essential roles as critical regulators in metabolic disorders. Some sphingolipids are known key factors in metabolic dysfunction. However, the precise effect of dihydroceramide on NAFLD remains unknown....
Article
Given the evidence for detoxifying/antioxidant enzyme-inducing activities by alantolactone (AL) and isoalantolactone (IAL), the purpose of this study was to investigate the effects of AL and IAL on Aβ25–35-induced cell death in mouse cortical neuron cells and to determine their effects on scopolamine-induced amnesia in mice. Our data demonstrated t...
Article
Scope: Brain-derived neurotrophic factor (BDNF) is a neurotrophin that supports the survival of existing neurons and encourages the growth and differentiation of new neurons and synapses. We investigated the effect of sulforaphane, a hydrolysis product of glucoraphanin present in Brassica vegetables, on neuronal BDNF expression and its synaptic si...
Article
Full-text available
Background Ginseng (Panax ginseng C.A. Meyer) has been used as a traditional herb in the treatment of many medical disorders. Ginsenosides, which are triterpene derivatives that contain sugar moieties, are the main pharmacological ingredients in ginseng. This study was designed to investigate the effect of ginsenoside Rg3-enriched ginseng extract (...
Chapter
Epidemiological studies suggest that both caffeinated coffee and decaffeinated coffee are neuroprotective. Data obtained from in vitro, in vivo, and human clinical trials have indicated that coffee exhibits protective effects against Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. Thus, the active coffee compounds that...
Article
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Heme oxygenase-1 (HO-1) has been suggested to be a key neuroprotective enzyme because of its widespread distribution in the brain as well as its strong antioxidative effects. HX106N, a water-soluble botanical formulation, has previously been demonstrated to prevent amyloid β-induced memory impairment and oxidative stress in mice by upregulating HO-...
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Atopic dermatitis (AD) is characterized by chronic highly pruritic and relapsing inflammatory skin lesions. Despite its growing prevalence, therapeutic treatments remain limited. Natural immune modulators from herbal extracts or derivatives may be useful for treating AD symptoms. This study examined the effect of 7,8,4'-trihydroxyisoflavone (7,8,4'...
Article
Sulforaphane, an organosulfur compound present in cruciferous vegetables, has been shown to exert neuroprotective effects in experimental in vitro and in vivo models of neurodegeneration. To determine whether sulforaphane can preserve cognitive function, we examined its effects on scopolamine-induced memory impairment in mice using the Morris water...
Article
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Recent reports on cocoa are appealing in that a food commonly consumed for pure pleasure might also bring tangible benefits for human health. Cocoa consumption is correlated with reduced health risks of cardiovascular diseases, hypertension, atherosclerosis, and cancer, and the health-promoting effects of cocoa are mediated by cocoa-driven phytoche...
Article
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The receptor for advanced glycation end products (RAGE) has been reported to have a pivotal role in the pathogenesis of Alzheimer's disease (AD). This study investigated RAGE levels in the hippocampus and cortex of a triple transgenic mouse model of AD (3xTg-AD) using western blotting and immunohistochemical double-labeling to assess cellular local...
Chapter
Epidemiological evidence supports the claim that diets rich in polyphenols lead to a relative improvement in aging. In fact, it has been reported that healthy centenarians show low levels of inflammatory biomarkers, and polyphenols as anti-inflammatory agents may prevent chronic diseases and extend human life. The objective of the current chapter i...
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Recent studies have revealed that microglial hyperactivation and neuroinflammation is implicated in development and progression of neurodegenerative diseases. In this study, we examined the beneficial effects of 3,3(')-diindolylmethane (DIM) and indole-3-carbinol (I3C), dietary components found in cruciferous vegetables, on brain inflammation. DIM,...
Article
Recent studies have demonstrated that microglial hyperactivation-mediated neuroinflammation is involved in the pathogenesis of several neurodegenerative diseases. Thus, inhibiting microglial production of the neurotoxic mediator tumor necrosis factor-α (TNF-α) is considered a promising strategy to protect against neurodegeneration. Here, we investi...
Article
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Atopic dermatitis (AD) is a common allergic disease, imposing large social and economic burdens worldwide. Atopic dermatitis is characterized by eczematous skin lesions and immunoglobulin E (IgE) hypersecretion. We investigated the role of JNK1 on the development of AD in mice. The vitamin D3 analogue MC903, a psoriasis therapeutic drug, was used t...
Article
Eupatilin, a major flavonoid of plants in the genus Artemisia, has been shown to exhibit anti-inflammatory, anti-oxidative, and anti-tumor effects. However, the potential anti-atherogenic effects of eupatilin and any underlying mechanisms have not been investigated. In the present study, we sought to determine the effects of eupatilin on phenotypes...
Article
Licorice extract which is used as a natural sweetener has been shown to possess inhibitory effects against prostate cancer, but the mechanisms responsible are poorly understood. Here, we report a compound, isoangustone A (IAA) in licorice that potently suppresses the growth of aggressive prostate cancer and sought to clarify its mechanism of action...
Article
Full-text available
Objective: To investigate the inhibitory effect of cocoa polyphenol extract (CPE) on adipogenesis and obesity along with its mechanism of action. Methods and results: 3T3-L1 preadipocytes were cultured with isobutylmethylxanthine, dexamethasone and insulin (MDI), and male C57BL/6N mice (N=44) were fed a high-fat diet (HFD) for 5 weeks with or wi...
Article
Introduction: Several human studies have reported that coffee consumption improves cognitive performance. In the present study, we investigated whether instant decaffeinated coffee also ameliorates cognitive performance and attenuates the detrimental effects of scopolamine on memory. Methods: Memory performance was evaluated in Morris water maze...
Article
Neurodegenerative disorders are strongly associated with oxidative stress, which is induced by reactive oxygen species including hydrogen peroxide (H₂O₂). Epidemiological studies have suggested that coffee may be neuroprotective, but the molecular mechanisms underlying this effect have not been clarified. In this study, we investigated the protecti...
Chapter
This chapter summarizes recent interesting and relevant findings regarding cocoa and its phytochemicals in human health. From over 3000 years ago to the present, cocoa has been used to treat anemia, mental fatigue, tuberculosis, fever, gout, kidney stones, and even poor sexual appetite. Several health effects, including improved heart function, rel...
Article
Benzo[a]pyrene-7,8-diol-9,10-epoxide (B[a]PDE) is a well-known carcinogen that is associated with skin cancer. Abnormal expression of cyclooxygenase-2 (COX-2) is an important mediator in inflammation and tumor promotion. We investigated the inhibitory effect of cyanidin-3-glucoside (C3G), an anthocyanin present in fruits, on B[a]PDE-induced COX-2 e...
Article
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Kaempferol, a natural flavonoid isolated from various plant sources, has been identified as a potential neuroprotectant. In this study, we investigated the protective effect of kaempferol against 4-hydroxynonenal (HNE)-induced apoptosis in PC12 rat pheochromocytoma cells. Kaempferol inhibited 4-HNE-mediated apoptosis, characterized by nuclear conde...
Article
Microglial hyperactivation is a hallmark of neurodegenerative diseases and the suppression of microglial hyperactivation is being investigated as a means to treat inflammation-mediated neurodegenerative disorders. Here we report that transcription factor Nrf2 in BV-2 microglia, which regulates the expression of phase II antioxidant enzyme genes, de...
Article
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Alzheimer's disease (AD) is an age-related neurodegenerative disease increasingly recognized as one of the most important medical problems affecting the elderly. Although a number of drugs, including several cholinesterase inhibitors and an NMDA receptor antagonist, have been approved for use, they have been shown to produce diverse side effects an...
Article
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We evaluated the effects of the two main kiwifruit cultivars (gold kiwifruit (GOK) and green kiwifruit (GRK)) and their active phenolic compound, quercetin, on H2O2-induced inhibition of gap-junction intercellular communication (GJIC) in WB-F344 rat liver epithelial cells. We found that both GOK and GRK protect WB-F344 cells from H2O2-induced inhib...
Article
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Nucfear hctor erythroid derived 2-related fador-2 (NrP) is a master transcription regulator of antioxi-dant and cytoprotective proteins that mediate cellular defense against oxidative and inflammatory stresses. Disruption of cellular stress response by NrP deficiency causes enhanced susceptibility to infection and related inflammatory diseases as a...
Article
The present study was performed to evaluate the effects of two different phenolic antioxidants, resveratrol (3,5,4'-trihydroxystilbene) and butylated hydroxyanisole (BHA), on the hydrogen peroxide (H2O2)-induced inhibition of gap-junction intercellular communication (GJIC) in WB-F344 rat liver epithelial cells (WB-F344). Resveratrol is a naturally...
Article
Nuclear factor-erythroid 2-related factor-2 (Nrf2) is a key transcription factor that plays a central role in cellular defense against oxidative and electrophilic insults by timely induction of antioxidative and phase-2 detoxifying enzymes and related stress-response proteins. The 5'-flanking regions of genes encoding these cytoprotective proteins...
Article
Allergic reactions to food can involve diarrhea, vomiting, nausea and abnormal pain. PG102 has previously been shown to control various factors involved in allergy pathogenesis, including IgE and various Th1 and Th2 cytokines, in vivo as well as in vitro [Park EJ, et al.: J Allergy Clin Immunol 2005;116:1151-1157; Park EJ, et al.: J Invest Dermatol...
Article
Role of microglial Nrf2 activation in preventing neuronal death caused by microglial hyperactivation is investigated by using BV-2 microglial cells as modulator and primary neurons as target. Pretreatment of microglial cells with tBHQ, a phenolic antioxidant activating Nrf2, attenuated the LPS-derived overproduction of pro-inflammatory neurotoxic m...
Article
Cadmium is a toxic heavy metal that accumulates in the environment and is commonly found in cigarette smoke and industrial effluents. This study was designed to determine the role of reactive oxygen species (ROS) generation, and its antagonism by antioxidants, in cadmium-mediated cell signaling and apoptosis in murine macrophage cultures. Cadmium-g...
Article
Cadmium is a nonessential heavy metal and a well-known persistent environmental pollutant. It causes a variety of toxic effects, including immunotoxicity. The exact mechanism of its cellular effects still is unclear. Cell-cycle regulation is an important factor that modulates cell death; however, cadmium-mediated cell-cycle arrest leading to cell d...
Article
Fumonisin B1 (FB1) is a toxic and carcinogenic mycotoxin produced by Fusarium verticillioides found on corn worldwide. The biological effects of FB1 are attributed to sphingolipid metabolism disruption as a result of ceramide synthase inhibition. Tumor necrosis factor alpha (TNFalpha) is an important modulator of FB1 hepatotoxicity. Kupffer cells a...
Article
Full-text available
Cadmium is a well-known carcinogenic and immunotoxic metal commonly found in cigarette smoke and industrial effluent. An altered intracellular calcium ([Ca(2+)](i)) level has been implicated in the pathophysiology of immune dysfunction. The present study was designed to determine the possible involvement of calcium (Ca(2+)) and mitogen-activated pr...
Article
Full-text available
Fumonisin B(1) (FB(1)) is a mycotoxin produced by Fusarium verticillioides found on corn and corn-based foods. It causes equine leukoencephalomalacia, porcine pulmonary edema, and liver and kidney damage in most animal species. Fumonisin B(1) perturbs sphingolipid metabolism by inhibiting ceramide synthase activity, leading to the production of cel...
Article
Mitogen-activated protein kinases (MAPKs) are thought to have a critical role in lipopolysaccharide (LPS)-induced immune responses but the molecular mechanisms underlying the mediation of these signaling are not clear. The roles of p38 and extracellular signal-regulated kinase (ERK) in the regulation of nitric oxide (NO) and proinflammatory cytokin...

Projects

Projects (2)
Project
Whether it's a drug or a supplement, obviously not everyone can respond. The research goal is to integrate existing biomedical data using all current technologies, review the big-data, and predict response and non-response groups using AI technology finally to perform randomized controlled trial on responders.
Project
Transient receptor potential vanilloid 1 (TRPV1) is a protein known for its role as the pain receptor that elicits a hot feeling when an organism eats the capsaicin of red chili peppers. This Ca2+-permeable cation channel is mainly expressed in the sensory neurons of the peripheral nervous system, but can also be expressed in the central nervous system, including the hippocampus and cortex. According to recent preclinical studies, TRPV1 mediates behavior related to anxiety and depression. The loss of TRPV1 functionality increases the expression of genes related to neurogenesis and synaptic plasticity. Thus, we hypothesize that TRPV1 deficiency may modulate Alzheimer’s disease (AD). This work is supported by the Korea Research Foundation Grant given to Jiyoung Kim #NRF-2018R1D1A1B07050182.