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Oh, Sun-Hee,Park, Se-Min,Park, Jong-Sook,Jang, An-Soo,Lee, Yong-Mok,Uh, Soo-Taek,Kim, Young Hoon,Choi, In-Seon,Kim, Mi-Kyeong,Park, Byeong Lae,Shin, Hyoung-Doo,Park, Choon-Sik The Korean Academy of Asthma, Allergy and Clinical 2009 Allergy, Asthma & Immunology Research Vol.1 No.1
<P><B>Purpose</B></P><P>Peroxisome proliferator-activated receptors (PPARs) are transcriptional factors activated by ligands of the nuclear hormone receptor superfamily. The activation of PPARγ regulates inflammation by downregulating the production of Th2 type cytokines and eosinophil function. In addition, a range of natural substances, including arachidonate pathway metabolites such as 15-hydroxyeicosatetranoic acid (15-HETE), strongly promote <I>PPARG</I> expression. Therefore, genetic variants of the <I>PPARG</I> gene may be associated with the development of aspirin-intolerant asthma (AIA). We investigated the relationship between single nucleotide polymorphism (SNP) of the <I>PPARG</I> gene and AIA.</P><P><B>Methods</B></P><P>Based on the results of an oral aspirin challenge, asthmatics (n=403) were categorized into two groups: those with a decrease in FEV<SUB>1</SUB> of 15% or greater (AIA) or less than 15% (aspirin-tolerant asthma, ATA). We genotyped two single nucleotide polymorphisms in the <I>PPARG</I> gene from Korean asthmatics and normal controls (n=449): +<I>34C>G</I> (Pro12Ala) and +<I>82466C>T</I> (His449His).</P><P><B>Results</B></P><P>Logistic regression analysis showed that +<I>82466C>T</I> and haplotype 1 (CC) were associated with the development of aspirin hypersensitivity in asthmatics (<I>P</I>=0.04). The frequency of the rare allele of +<I>82466C>T</I> was significantly higher in AIA patients than in ATA patients in the recessive model [<I>P</I>=0.04, OR=3.97 (1.08-14.53)]. In addition, the frequency of <I>PPARG</I> haplotype 1 was significantly lower in AIA patients than in ATA patients in the dominant model (OR=0.25, <I>P</I>=0.04).</P><P><B>Conclusions</B></P><P>The +<I>82466C>T</I> polymorphism and haplotype 1 of the <I>PPARG</I> gene may be linked to increased risk for aspirin hypersensitivity in asthma.</P>
Oh, Chang Taek,Park, Jong Il,Jung, Yi Ra,Joo, Yeon Ah,Shin, Dong Ha,Cho, Hyoung Joo,Ahn, Soo Mi,Lim, Young-Ho,Park, Chae Kyu,Hwang, Jae Sung The Korean Society of Ginseng 2013 Journal of Ginseng Research Vol.37 No.4
Korean Red Ginseng (KRG) has been reported to exert anticancer, anti-oxidant, and anti-inflammatory effects. However, there has been no report on the effect of KRG on skin pigmentation. In this study, we investigated the inhibitory effect of KRG on melanocyte proliferation. KRG extract (KRGE) at different concentrations had no effect on melanin synthesis in melan-A melanocytes. Saponin of KRG (SKRG) inhibited melanin content to 80% of the control at 100 ppm. Keratinocyte-derived factors induced by UV-irradiation were reported to stimulate melanogenesis, differentiation, proliferation, and dendrite formation. In this study, treatment of melan-A melanocytes with conditioned media from UV-irradiated SP-1 keratinocytes increased melanocyte proliferation. When UV-irradiated SP-1 keratinocytes were treated with KRGE or SKRG, the increase of melanocyte proliferation by the conditioned media was blocked. Granulocyte-macrophage colony-stimulating factor (GM-CSF) was produced and released from UV-irradiated keratinocytes. This factor has been reported to be involved in regulating the proliferation and differentiation of epidermal melanocytes. In this study, GM-CSF was significantly increased in SP-1 keratinocytes by UVB irradiation ($30mJ/cm^2$), and the proliferation of melan-A melanocytes increased significantly by GM-CSF treatment. In addition, the proliferative effect of keratinocyte-conditioned media on melan-A melanocytes was blocked by anti-GM-CSF treatment. KRGE or SKRG treatment decreased the expression of GM-CSF in SP-1 keratinocytes induced by UVB irradiation. These results demonstrate that UV irradiation induced GM-CSF expression in keratinocytes and KRGE or SKRG inhibited its expression. Therefore, KRG could be a good candidate for regulating UV-induced melanocyte proliferation.
김형길(Hyoung-Gil Kim),김철호(Chul-Ho Kim),서영택(Young-Taek Seo),오철수(Chul-Soo Oh) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Nowadays, the global interests are concentrated on the preserving of the clean environment, and the diminishing of the dependence on the fossil energy, and among the possible alternative energies, the wind turbine generating system is considered to be the best suited to produce high efficiency energy, without affecting the natural environment. The permanent magnet generators were been used for the wind power generating, for long time, with continuous efforts to improve the generating efficiency. And the latest trend on it is to develop an AFPM(Axial Flux Permanent Magnet)type, which is composed in the structure of rotor and stator shaped in the disc forms, and the direction of the flux at the air gap runs in parallel to the shaft. This thesis is on the study concerning with the analysis of the characteristics of the 5 ㎾ at 300rpm direct drive AFPM generator which is suitable for the small scale wind turbine generating system. In it, the Electro-magnetically Careless AFPM was been analyzed, the prototype generators been made, concentrated on interpreting the characteristics of the power output, and verifying it through the theoretical study and practical tests.
Jin Hyoung Cho,Kyu Tae Chang,Young Choon Lee,Keon Bong Oh,Dong Hoon Kwak,Ji Su Kim,Jae Sung Ryu,So Dam Lee,So Hyun Lee,Ju Taek Lee,Young Kug Choo 한국당과학회 2011 한국당과학회 학술대회 Vol.2011 No.1
Gangliosides are ubiquitous component of the membranes of mammalian cells that have been suggested to play important roles in various cell functions such as cell-cell interaction, adhesion, cell differentiation, growth control and signaling. However, the role that gangliosides play in immune rejection response by xenotransplantation is not yet clearly understood. In this study, regulatory roles of human leukocyte in the ganglioside expression of the primary cultured micro-pig aortic endothelial cells (PAECs) were investigated. To study whether human leukocyte are related to expressional changes of gangliosides in PAECs we performed high-performance thin layer chromatography (HPTLC) in PAECs incubated with fetal bovine serum (FBS), as control, or with recombinant human tumor necrosis factor-α (TNF-α), or with human serum and FBS contained with human leukocyte. Both HPTLC and immunohistochemistry analyses revealed that PAECs incubated with FBS are contained GM3, GM1 and GD3 as major gangliosides. However, ganglioside GM1 significantly decreased in PAECs incubated for 5hrs with TNF-α (10 ng/ml), or with 10% human serum and FBS contained with human leukocytes. Taken together, these results suggest that human TNF-α secreted by human leukocyte against PAECs and possibly happened expressional pattern changes of ganglioside GM1 in PAECs by secreted TNF-α. The finding that human leukocyte promotes expressional pattern changes of ganglioside in PAECs depending on TNF-α secreation may be relevant for designing future therapeutic strategies intended to prolong xenograft survival.
이동성 지원을 위한 MPLS VPN 에서의 Smooth Hand - off의 설계 및 구현
임형택(Hyoung-Taek Lim),오명환(Myoung-Hwan Oh),이영석(Young-suk Lee),최훈(Hoon Choi) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1C
많은 기업들이 사설망과 같은 수준의 기능을 제공하면서 사설망에 비해 매우 경제적인 VPN 을 기업 네트웍의 인프라로 채택하고 있다. VPN 을 구성하는데 있어 우수한 QoS 나 보안 기능을 제공하는 MPLS VPN 이 VPN 을 구성하기 위한 최적의 방법으로 간주되고 있다. 또한 모바일 컴퓨팅의 보편화와 이동 환경에서의 인터넷 서비스에 대한 요구의 증가로 VPN 에서도 이동 인터넷 서비스를 제공할 필요가 있게 되었다. 본 논문에서는 IP 의 이동성을 제공하는 Mobile IP 와 MPLS VPN 을 결합하여 VPN 이용자에게 이동 인터넷 서비스를 제공하는 방법을 설명하고 이동 노드의 핸드오프시 발생하는 패킷 손실을 최소하기 위해 Smooth handoff 를 지원하는 MPLS VPN 을 Linux 에서 구현하고 테스트를 수행하였다.
Identification of S Haplotypes in Commercial F1 Hybrid Cultivars of Radish by PCR-RFLP Analysis
Sun Hyoung Lim,Ki Taek Kim,Su Hyoung Park,Hwa Jin Cho,Han Yong Park,So Young Hwang,Moo Kyoung Yoon,Il Gin Mok,Jong Gyu Woo,Dae Geun Oh 한국육종학회 2006 한국육종학회지 Vol.38 No.3
Self incompatibility (SI) of Cruciferous crop has been studied not only to find out the evolution of the self incompat-ibility system, but also to identify the S haplotypes of the plant materials on the practical breeding programs. It has been reportedtha
Chang Taek Oh,Jong Il Park,Yi Ra Jung,Yeon Ah Joo,Dong Ha Shin,Hyoung Joo Cho,Soo Mi Ahn,Young-Ho Lim,Chae Kyu Park,Jae Sung Hwang 고려인삼학회 2013 Journal of Ginseng Research Vol.37 No.4
Korean Red Ginseng (KRG) has been reported to exert anticancer, anti-oxidant, and anti-inflammatory effects. However, there has been no report on the effect of KRG on skin pigmentation. In this study, we investigated the inhibitory effect of KRG on melanocyte proliferation. KRG extract (KRGE) at different concentrations had no effect on melanin synthesis in melan-A melanocytes. Saponin of KRG (SKRG) inhibited melanin content to 80% of the control at 100 ppm. Keratinocyte-derived factors induced by UV-irradiation were reported to stimulate melanogenesis, differentiation, proliferation, and dendrite formation. In this study, treatment of melan-A melanocytes with conditioned media from UV-irradiated SP-1 keratinocytes increased melanocyte proliferation. When UV-irradiated SP-1 keratinocytes were treated with KRGE or SKRG, the increase of melanocyte proliferation by the conditioned media was blocked. Granulocyte-macrophage colony-stimulating factor (GM-CSF) was produced and released from UV-irradiated keratinocytes. This factor has been reported to be involved in regulating the proliferation and differentiation of epidermal melanocytes. In this study, GM-CSF was significantly increased in SP-1 keratinocytes by UVB irradiation (30 mJ/cm2), and the proliferation of melan-A melanocytes increased significantly by GM-CSF treatment. In addition, the proliferative effect of keratinocyte-conditioned media on melan-A melanocytes was blocked by anti-GM-CSF treatment. KRGE or SKRG treatment decreased the expression of GM-CSF in SP-1 keratinocytes induced by UVB irradiation. These results demonstrate that UV irradiation induced GM-CSF expression in keratinocytes and KRGE or SKRG inhibited its expression. Therefore, KRG could be a good candidate for regulating UV-induced melanocyte proliferation.