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KO, SEOK-CHUN,LEE, DAE-SUNG,PARK, WON SUN,YOO, JONG SU,YIM, MI-JIN,QIAN, ZHONG-JI,LEE, CHANG-MIN,OH, JUNGHWAN,JUNG, WON-KYO,CHOI, IL-WHAN Spandidos Publications 2016 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.37 No.1
<P>The aim of the present study was to examine whether the intestine gastrointestinal (GI) digests of abalone [Halioti s discus hannai (H. discus hannai)] modulate inflammatory responses and to elucidate the mechanisms involved. The GI digests of the abalone intestines were fractionated into fractions I (>10 kDa), 11 (5-10 kDa) and III (<5 kDa). Of the abalone intestine GI digests (AIGIDs), fraction III inhibited the passive cutaneous anaphylaxis (PCA) reaction in mice. Subsequently, a bioactive peptide [abalone intestine GI digest peptide (AIGIDP)] isolated from fraction III was determined to be 1175.2 Da, and the amino acid sequence was found to be PFNQGTFAS. We noted that the purified nonameric peptide (AIGIDP) attenuated the phorbol-12-myristate 13-acetate plus calcium ionophore A23187 (PMACI)-induced histamine release and the production of pro-inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha), interleukin (IL)-1 beta and IL-6 in human mast cells (HMC-1 cells). In addition, we also noted that AIGIDP inhibited the PMACI-induced activation of nuclear factor-kappa B (NF-kappa B) by suppressing I kappa B alpha phosphorylation and that it suppressed the production of cytokines by decreasing the phosphorylation of JNK. The findings of our study indicate that AIGIDP exerts a modulatory, anti-allergic effect on mast cell-mediated inflammatory diseases.</P>
GM-CSF Promotes Antitumor Immunity by Inducing Th9 Cell Responses
Kim, Il-Kyu,Koh, Choong-Hyun,Jeon, Insu,Shin, Kwang-Soo,Kang, Tae-Seung,Bae, Eun-Ah,Seo, Hyungseok,Ko, Hyun-Ja,Kim, Byung-Seok,Chung, Yeonseok,Kang, Chang-Yuil American Association for Cancer Research 2019 Cancer immunology research Vol.7 No.3
<P>Granulocyte-macrophage colony-stimulating factor (GM-CSF) functions as an adjuvant for antitumor immunity through an unclear mechanism. By activating monocyte-derived dendritic cells, GM-CSF induces Th9 development and IL9 production, which facilitates antitumor cytotoxic T lymphocyte responses.</P><P>GM-CSF as an adjuvant has been shown to promote antitumor immunity in mice and humans; however, the underlying mechanism of GM-CSF–induced antitumor immunity remains incompletely understood. In this study, we demonstrate that GM-CSF potentiates the efficacy of cancer vaccines through IL9-producing Th (Th9) cells. GM-CSF selectively enhanced Th9 cell differentiation by regulating the COX2–PGE<SUB>2</SUB> pathway while inhibiting the differentiation of induced regulatory T (iTreg) cells <I>in vitro</I> and <I>in vivo</I>. GM-CSF–activated monocyte-derived dendritic cells converted tumor-specific nai¨ve Th cells into Th9 cells, and delayed tumor growth by inducing antitumor CTLs in an IL9-dependent manner. Our findings reveal a mechanism for the adjuvanticity of GM-CSF and provide a rationale for the use of GM-CSF in cancer vaccines.</P>
Kim, Eun-A,Kim, Seo-Young,Ye, Bo-Ram,Kim, Junseong,Ko, Seok-Chun,Lee, Won Woo,Kim, Kil-Nam,Choi, Il-Whan,Jung, Won-Kyo,Heo, Soo-Jin Elsevier 2018 INTERNATIONAL IMMUNOPHARMACOLOGY Vol.59 No.-
<P><B>Abstract</B></P> <P>In this study, we confirmed the anti-inflammatory effect of Apo-9-fucoxanthinone (AF) in <I>in vitro</I> RAW 264.7 cells and <I>in vivo</I> zebrafish model. In lipopolysaccharide (LPS)-stimulated zebrafish, AF significantly decreased the production of reactive oxygen species (ROS), nitric oxide (NO) and cell death. In addition, the mRNA expression of inducible nitric oxide synthase (iNOS), suppressed cyclooxygenase-2 (COX-2) and an inflammatory cytokines; IL-1β, TNF-α were shown reduction. And AF significantly inhibited NO production and expression of iNOS in LPS-stimulated RAW 264.7 cells. Further, AF suppressed COX-2, prostaglandin E2 (PGE<SUB>2</SUB>), and pro-inflammatory cytokines such as interleukin-6 (IL-6), IL-1β, and tumor necrosis factor-α (TNF-α) at 25, 50 and 100 μg/mL, respectively. Further mechanistic studies showed that AF suppressed the nuclear factor-kB (NF-kB) pathway and phosphorylation of mitogen-activated protein kinase (MAPK) pathway molecules such as extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK). According to the results, AF can be used and applied as a useful anti-inflammatory agent of nutraceutical or pharmaceutical.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Anti-inflammatory effect of Apo-9-fucoxanthinone in <I>in vitro</I> RAW 264.7 cells and <I>in vivo</I> zebrafish </LI> <LI> Apo-9-fucoxanthinone suppressed NO production through NF-kB and MAPKs pathway. </LI> <LI> In LPS-stimulated zebrafish, Apo-9-fucoxanthinone significantly decreased ROS, NO, cell death and pro-inflammatory cytokines. </LI> <LI> Apo-9-fucoxanthinone can be extremely useful as an effective anti-inflammatory agent. </LI> </UL> </P>
Ryu, BoMi,Choi, Il-Whan,Qian, Zhong-Ji,Heo, Soo-Jin,Kang, Do-Hyung,Oh, Chulhong,Jeon, You-Jin,Jang, Chul Ho,Park, Won Sun,Kang, Kyong-Hwa,Je, Jae-Young,Kim, Se-Kwon,Kim, Young-Mog,Ko, Seok-Chun,Kim, G The Korean Society of Phycology 2014 ALGAE Vol.29 No.4
Despite the extensive literature on marine algae over the past few decades, a paucity of published research and studies exists on red algae. The purpose of this study was to evaluate the potential therapeutic properties of the ethanol extract of the red alga Callophyllis japonica against lipopolysaccharide (LPS)-stimulated macrophage inflammation. The C. japonica extract (CJE) significantly inhibited the nitric oxide (NO) production and the induced dose-dependent reduction of the protein and mRNA levels of inducible nitric oxide synthase and cyclooxygenase-2. Additionally, the CJE reduced the mRNA levels of inflammatory cytokines, including tumor necrosis factor-${\alpha}$, interleukin (IL)-$1{\beta}$, and IL-6. We investigated the mechanism by which the CJE inhibits NO by examining the level of mitogen-activated protein kinases (MAPKs) activation, which is an inflammation-induced signaling pathway in macrophages. The CJE significantly suppressed the LPS-induced phosphorylation of c-Jun N-terminal kinase, extracellular signal-regulated kinase and p38 MAPK. Taken together, the results of this study demonstrate that the CJE inhibits LPS-induced inflammation by blocking the MAPK pathway in macrophages.
Mi-Jin Yim,Jeongmin Lee,Seok-Chun Ko,Hyun-Soo Kim,Jeong Min Shin,Ji Yul Kim,Dae-Sung Lee,Il-Whan Choi 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Sargassum horneri exhibits broad bioactive properties. However the anti-psoriatic effects of its have not been reported. The present study evaluated whether ethanol extract of S. horneri (ESH) can improve the symptoms of psoriasis in vitro and in vivo and elucidated the mechanisms underlying those effects in vitro. ESH treatment significantly attenuated the protein levels of IL-6, IL-8, and TNF-α in IFN-γ/TNF-α stimulated HaCaT keratinocytes. In addition, ESH inhibited (PI3K)/Akt phosphorylation and NF-κB activation in HaCaT keratinocytes. We further demonstrated that the ESH significantly ameliorates the severity of skin lesions (erythema, scaling, and thickness) in the IMQ-induced psoriasis-like mouse model. ESH attenuated the production of inflammatory cytokines by inhibiting Akt/NF-κB signaling pathways in IFN-γ/TNF-α-induced HaCaT keratinocytes. Furthermore, ESH could ameliorate the severity of skin lesions in an IMQ-induced psoriasis-like mouse model. Thus, S. horneri has considerable potential in the treatment or prevention of inflammatory disorders, such as psoriasis.
Seo, Goo-Young,Lee, Jeong-Min,Jang, Young-Saeng,Kang, Seung Goo,Yoon, Sung-il,Ko, Hyun-Jeong,Lee, Geun-Shik,Park, Seok-Rae,Nagler, Cathryn R.,Kim, Pyeung-Hyeun Elsevier 2017 Cellular immunology Vol.322 No.-
<P><B>Abstract</B></P> <P>The present study extends an earlier report that retinoic acid (RA) down-regulates IgE Ab synthesis in vitro. Here, we show the suppressive activity of RA on IgE production in vivo and its underlying mechanisms. We found that RA down-regulated IgE class switching recombination (CSR) mainly through RA receptor α (RARα). Additionally, RA inhibited histone acetylation of germ-line ε (GL ε) promoter, leading to suppression of IgE CSR. Consistently, serum IgE levels were substantially elevated in vitamin A-deficient (VAD) mice and this was more dramatic in VAD-lecithin:retinol acyltransferase deficient (LRAT<SUP>−/−</SUP>) mice. Further, serum mouse mast cell protease-1 (mMCP-1) level was elevated while frequency of intestinal regulatory T cells (Tregs) were diminished in VAD LRAT<SUP>−/−</SUP> mice, reflecting that deprivation of RA leads to allergic immune response. Taken together, our results reveal that RA has an IgE-repressive activity in vivo, which may ameliorate IgE-mediated allergic disease.</P> <P><B>Highlights</B></P> <P> <UL> <LI> RA represses IgE CSR through RA receptor alpha (RARα). </LI> <LI> RA inhibits histone acetylation of Ig germ-line ε (GL ε) promoter. </LI> <LI> RA has an IgE-repressive activity in vivo, which may ameliorate IgE-mediated allergic disease. </LI> </UL> </P>
Ko, Kwang-Seok,Lee, Il-Woo,Joo, Won-Il,Lee, Kyung-Jun,Park, Hae-Kwan,Rha, Hyung-Keun The Korean Neurosurgical Society 2007 Journal of Korean neurosurgical society Vol.42 No.2
Objective : Adipose tissue is derived from the embryonic mesoderm and contains a heterogenous stromal cell population. Authors have tried to verify the characteristics of stem cell of adipose derived stromal cells (ADSCs) and to investigate immunohistochemical findings after transplantation of ADSC into rat brain to evaluate survival, migration and differentiation of transplanted stromal cells. Methods : First ADSCs were isolated from human adipose tissue and induced adipose, osseous and neuronal differentiation under appropriate culture condition in vitro and examined phenotypes profile of human ADSCs in undifferentiated states using flow cytometry and immunohistochemical study. Human ADSCs were transplanted into the healthy rat brain to investigate survival, migration and differentiation after 4 weeks. Results : From human adipose tissue, adipose stem cells were harvested and subcultured for several times. The cultured ADSCs were differentiated into adipocytes, osteoctye and neuron-like cell under conditioned media. Flow cytometric analysis of undifferentiated ADSCs revealed that ADSCs were positive for CD29, CD44 and negative for CD34, CD45, CD117 and HLA-DR. Transplanted human ADSCs were found mainly in cortex adjacent to injection site and migrated from injection site at a distance of at least 1 mm along the cortex and corpus callosum. A few transplanted cells have differentiated into neuron and astrocyte. Conclusion : ADSCs were differentiated into multilineage cell lines through transdifferentiation. ADSCs were survived and migrated in xenograft without immunosuppression. Based on this data, ADSCs may be potential source of stem cells for many human disease including neurologic disorder.
An Information Security Evaluation Indices for an enterprise organization
Il Seok Ko,Gwang Uk Ko,Dae Kyung Na,Heui Seong Na 한국산학기술학회 2005 한국산학기술학회 학술대회 Vol.- No.-
Most of the evaluation systems have performed evaluation with an emphasis on information security products so far. However, evaluating information security level for an enterprise needs analysis of the whole enterprise organization, and a synthetic and systematic evaluation system based on it. This study has tried to grasp the information security level of the whole enterprise organization, and develop an evaluation system of information security level for suggesting a more developing direction of information security.