Heme oxygenase-1 mediated protective effect of methyl gallate on cadmium-induced cytotoxicity in cultured mouse mesangial cells

Cha, Seok-Ho,Suh, Chang-Kook The Korean Society of Toxicogenomics and Toxicopro 2010 Molecular & cellular toxicology Vol.6 No.2

To clarify the effect of a phytochemical, methyl gallate (MG) on a heavy metal (cadmium)-induced renal toxicity, cytotoxicity and the change of heme oxygenase-1 (HO-1) gene expression was studied using cultured mouse renal glomerular mesangial cells (MMC). By employing RT-PCR and Western blotting analysis, we have examined the HO-1 induction in MMCs that were treated with $Cd^{2+}$ and/or MG. Using MTT assay we have also examined the cytoprotective effect of HO-1 induction against the cytotoxicity caused by toxic dose of $Cd^{2+}$. In MMCs exposed to $Cd^{2+}$ and MG, expression of HO-1 (mRNA and protein) was increased in a concentration- and time-dependent manner. The increments of HO-1 mRNA and protein expressions by $Cd^{2+}$ and MG were inhibited by the treatment of the cells with actinomycin D, an inhibitor of transcription. The decreased viability of the cells by $Cd^{2+}$ was partially recovered by the treatment of MG and this recovery by the MG was reduced by the treatment of zinc protoporphyrin IX (a HO-1 inhibitor). From these results, methyl gallate might have cytoprotective effect on $Cd^{2+}$-induced cytotoxicity that is related with heme oxygenase-1 induction.

운동강도의 차이가 대장에서의 Heme oxygenase-1 발현에 미치는 영향: Oligonucleotide chip microarray analysis

최은주 ( Eun Ju Choi ),류호영 ( Ho Young Ryu ),차광석 ( Kwang Suk Cha ) 한국운동생리학회(구-한국운동과학회) 2012 운동과학 Vol.21 No.1

이 연구의 목적은 운동강도 차이에 의한 대장조직이 Heme oxygenase-1(HO-1)의 mRNA 발현에 어떠한 영향을 미치는지 규명하기 위해, Sprage-Dawley계 흰쥐를 대상으로 통제그룹(CON)과 저강도 운동그룹(LIE), 고강도 운동그룹(HIE)으로 구분하여 4주 동안 트레드밀운동 후 48시간 이후에 High through-put microarray analysis방법으로 다음과 같은 실험을 실시하였다. 본 실험은 Rat ABI oligo chip 26,857 개의 유전자 중 filtering을 통하여 12.079개 유전지를 선택하였고, 이 중 유의성 있는(p<.05) 유전자 12,072개를 선별하였으며, clustering분석 방법과 면역조직화학염색법에서도 HO-l이 운동강도에 따라 유의하게 발현하였다(p<.05). Microarray분석 후 RT-PCR로 확인한 결과 HO-I의 유전자 발현양상이 일치하는 결과를 얻었다. 이 실험의 결과로서 운동이 대장에서 HO-1 발현에 영향을 주는 것을 알 수 있었다. 운동이 대장에서의 mRNA 발현이 저강도 운동그룹(LIE)보다 고강도 운동그룹(HIE)에서 더 많이 발현되어지는 것으로 보아 고강도 운동에 의해 발생되는 산소라디칼을 HO-l의 유도를 통하여 적절히 제거함으로써 스스로 항상성을 유지하고 있는 것으로 생각되어진다. The purpose of this study is to identify how large intestine tissue effects to mRNA expression in Heme oxygenase-l (HO-1) due to differences in exercise intensity. To perform this experiment we divided Sprage-Dawley rats into 3 groups (control group (CON). low-intensity exercise group (LIE) and high-intensity exercise group (HIE)), and in 48 hours after 4 weeks treadmill exercise. the following experiment was performed with "High through-put micro array analysis methods" . 12,079 genes were chosen by filtering of the Rat ASI oligo chip 26.857 genes in this experiment Among 12.079 genes, we selected significant genes (p<.05) that were also expressed in the ways of clustering analysis and immunohistochemistry. With results of RT-PCR confirming and microarray analyzing, we derived that gene expression profiles of HO-l had been consistent. As a result of this experiment, we certainly identified that exercise effects to HQ-l expression in large intestine. mRNA expression was more expressed in high-intensity exercise group CHIE) than low-intensity exercise group (LIE), it seems that homeostasis maintains itself by properly removing oxygen radical. caused by high intensity exercise. through reduction of HO-l.

Morin exerts cytoprotective effects against oxidative stress in C2C12 myoblasts via the upregulation of Nrf2-dependent HO-1 expression and the activation of the ERK pathway

Lee, Moon Hee,Han, Min Ho,Lee, Dae-Sung,Park, Cheol,Hong, Su-Hyun,Kim, Gi-Young,Hong, Sang Hoon,Song, Kyoung Seob,Choi, Il-Whan,Cha, Hee-Jae,Choi, Yung Hyun UNKNOWN 2017 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.39 No.2

<P>In the present study, we investigated the cytoprotective efficacy of morin, a natural flavonoid, against oxidative stress and elucidated the underlying mechanisms in C2C12 myoblasts. Our results indicated that morin treatment prior to hydrogen peroxide (H2O2) exposure significantly increased cell viability and prevented the generation of reactive oxygen species. H2O2-induced comet-like DNA formation and gamma H2AX phosphorylation were also markedly suppressed by morin with a parallel inhibition of apoptosis in C2C12 myoblasts, suggesting that morin prevented H2O2-induced cellular DNA damage. Furthermore, morin markedly enhanced the expression of heme oxygenase-1 (HO-1) associated with the induction and phosphorylation of nuclear factor-erythroid 2-related factor 2 (Nrf2) and the inhibition of Kelch-like ECH-associated protein 1 (Keapl) expression. Notably, these events were eliminated by transient transfection with Nrf2-specific small interfering RNA. Additional experiments demonstrated that the activation of the Nrf2/HO-1 pathway by morin was mediated by the extracellular signal-regulated kinase (ERK) signaling cascade. This phenomenon was confirmed with suppressed Nrf2 phosphorylation and consequently diminished HO-1 expression in cells treated with a pharmacological inhibitor of ERK. Collectively, these results demonstrated that morin augments the cellular antioxidant defense capacity through the activation of Nrf2/HO-1 signaling, which involves the activation of the ERK pathway, thereby protecting C2C12 myoblasts from H2O2,-induced oxidative cytotoxicity.</P>

Antioxidant and hepatoprotective effects of Korean ginseng extract GS-KG9 in a D-galactosamine-induced liver damage animal model

Yun Ho Jo,Hwan Lee,Myeong Hwan Oh,Gyeong Hee Lee,You Jin Lee,Ji Sun Lee,Min Jung Kim,Won Yong Kim,Jin Seong Kim,Dae Seok Yoo,Sang Won Cho,Seon Woo Cha,Mi Kyung Pyo 한국영양학회 2020 Nutrition Research and Practice Vol.14 No.4

BACKGROUND/OBJECTIVES: This study was designed to investigate the improvement effect of white ginseng extract (GS-KG9) on D-galactosamine (Ga1N)-induced oxidative stress and liver injury. SUBJECTS/METHODS: Sixty Sprague-Dawley rats were divided into 6 groups. Rats were orally administrated with GS-KG9 (300, 500, or 700 mg/kg) or silymarin (25 mg/kg) for 2 weeks. The rats of the GS-KG9- and silymarin-treated groups and a control group were then intraperitoneally injected Ga1N at a concentration of 650 mg/kg for 4 days. To investigate the protective effect of GS-KG9 against GalN-induced liver injury, blood liver function indicators, anti-oxidative stress indicators, and histopathological features were analyzed. RESULTS: Serum biochemical analysis indicated that GS-KG9 ameliorated the elevation of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) in GalN-treated rats. The hepatoprotective effects of GS-KG9 involved enhancing components of the hepatic antioxidant defense system, including glutathione, glutathione peroxidase (GPx), superoxide dismutase (SOD), and catalase (CAT). In addition, GS-KG9 treatment inhibited reactive oxygen species (ROS) production induced by GalN treatment in hepatocytes and significantly increased the expression levels of nuclear factor erythroid-2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) proteins, which are antioxidant proteins. In particular, by histological analyses bases on hematoxylin and eosin, Masson"s trichrome, α-smooth muscle actin, and transforming growth factor-β1 staining, we determined that the administration of 500 mg/kg GS-KG9 inhibited hepatic inflammation and fibrosis due to the excessive accumulation of collagen. CONCLUSIONS: These findings demonstrate that GS-KG9 improves GalN-induced liver inflammation, necrosis, and fibrosis by attenuating oxidative stress. Therefore, GS-KG9 may be considered a useful candidate in the development of a natural preventive agent against liver injury.

Antioxidant and cytoprotective effects of morin against hydrogen peroxide-induced oxidative stress are associated with the induction of Nrf-2-mediated HO-1 expression in V79-4 Chinese hamster lung fibroblasts

Lee, Moon Hee,Cha, Hee-Jae,Choi, Eun Ok,Han, Min Ho,Kim, Sung Ok,Kim, Gi-Young,Hong, Su Hyun,Park, Cheol,Moon, Sung-Kwon,Jeong, Soon-Jeong,Jeong, Moon-Jin,Kim, Wun-Jae,Choi, Yung Hyun Spandidos Publications 2017 International journal of molecular medicine Vol.39 No.3

<P>Natural phytochemicals of plant origin, including flavonoids, have been found to be potent antioxidants providing beneficial effects against oxidative stress-related diseases. The present study was carried out to investigate the antioxidant properties of morin, a flavonoid originally isolated from the flowering plants of the Moraceae family. Superoxide dismutase (SOD)-like activity and 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS(center dot+)) radical scavenging activity were determined. We also investigated the cytoprotective effects of morin against hydrogen peroxide (H2O2)-induced DNA damage and apoptosis in V79-4 Chinese hamster lung fibroblasts. Our results demonstrated that morin had strong scavenging effects against ABTS' radicals with enhanced SOD activity, which varied in a dose-dependent manner. Morin was found to reduce H2O2-induced intracellular reactive oxygen species generation and nuclear DNA damage, and it recovered cell viability damaged by H2O2 via inhibition of mitochondrial dysfunction-mediated apoptosis. Notably, the treatment of V79-4 cells with morin markedly enhanced the expression of heme oxygenase-1 (HO-1) but not quinone oxidoreductase-1, which was associated with the increased expression and phosphorylation of nuclear factor-erythroid 2-related factor 2 (Nrf2) and the downregulation of Kelch-like ECH-associated protein 1 expression. Based on our findings, we conclude that morin effectively ameliorated oxidative stress-induced DNA damage through intrinsic free radical scavenging activity and activation of the Nrf2/HO-1 pathway.</P>

골수이식 후 골밀도 및 골대사의 변화 : 2년 추적관찰 2-Year Prospective Study

이원영,강무일,오은숙,오기원,한제호,손현식,윤건호,차봉연,이광우,손호영,강성구,신완식,민우성,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

조혈모세포이식술이 골수기질세포의 기원 및 조골세포로의 증식 및 분화에 미치는 효과

강무일,조성원,오은숙,백기현,이원영,오기원,김혜수,한제호,윤건호,차봉연,이광우,손호영,강성구,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

Anti-Proliferative Effect of an Aqueous Extract of <i>Prunella vulgaris</i> in Vascular Smooth Muscle Cells

Hwang, Sun Mi,Lee, Yun Jung,Lee, Yong Pyo,Yoon, Jung Joo,Lee, So Min,Cha, Jeong Dan,Choi, Kyung Min,Kang, Dae Gill,Lee, Ho Sub Hindawi Publishing Corporation 2013 Evidence-based Complementary and Alternative Medic Vol.2013 No.-

<P>The abnormal proliferation of vascular smooth muscle cells (VSMCs) in arterial walls is an important pathogenic factor of vascular disorders such as diabetic atherosclerosis. We have reported the anti-inflammatory effect of an aqueous extract from <I>Prunella vulgaris</I> (APV) in vascular endothelial cell. In the present study, APV exhibited inhibitory effects on high glucose-stimulated VSMC proliferation, migration, and invasion activities, inducing G<SUB>1</SUB> cell cycle arrest with downregulation of cyclins and CDKs and upregulation of the CKIs, p21<SUP>waf1/cip1</SUP> and p27<SUP>kip1</SUP>. Furthermore, APV dose dependently suppressed the high glucose-induced matrix metalloproteinase activity. High glucose-induced phosphorylation of ERK, p38 MAPK, was decreased by the pretreatment of APV. NF-<I><I>κ</I></I>B activation by high glucose was attenuated by APV, as an antioxidant. APV attenuated the high glucose-induced decrease of nuclear factor E2-related factor-2 (Nrf2) translocation and heme oxygenase-1 (HO-1) expression. Intracellular cGMP level was also increased by APV treatment. These results demonstrate that APV may inhibit VSMC proliferation via downregulating ROS/NF-<I><I>κ</I></I>B /ERK/p38 MAPK pathways. In addition, APV has a beneficial effect by the interaction of Nrf2-mediated NO/cGMP with HO-1, suggesting that <I>Prunella vulgaris</I> may be useful in preventing diabetic atherosclerosis.</P>

시교육의 관점 변화 및 지향점

차호일 청람어문교육학회 2005 청람어문교육 Vol.30 No.-

이 글은 최근의 시교육에 대한 관점 변화와 앞으로 시교육이 나아갈 방향을 탐색해보고자 한 글이다. 시교육은 형식적 문학이론에 기초한 텍스트 중심 관점 독자반응 , 이론에 기초한 학습자 중심관점, 그리고 최근의 후기구조주의 문학 , 이론에 기초한 상황중심 관점으로 그 관점을 변화시켜 왔다. 그러나 이것이 곧 한 관점의 시교육 방식이 사라지고 이어 다음의 시교육 방식이 학교교육을 지배한다는 것을 말하는 것은 아니다. 각 관점의 시교육 방식들은 서로 나름대로 장점과 단점을 가지고 공존하고 있다. 따라서 앞으로 시교육이 나아갈 방향은 이들 어느 한 관점을 중심으로 시교육을 해나갈 것이 아니라 이 세 관점의 장점을 통합하는 방향으로 이루어져야 할 것이다. This thesis is study on the change of viewpoint and pointing spot in poetic education. The poetic education have been varied text-centered viewpoint being based on formalism literature theory, learner-centered viewpoint being based on reader-response theory, and context-centered viewpoint being based on post-structuralism literature theory in order. But this variation does not mean that one viewpoint disappears and other viewpoint of poetic education becomes influential in poetic education. Each viewpoint of poetic education coexist with mutual strong point and weak point. Therefore, a poetic education must not points towards one viewpoint, but towards integrated viewpoint.

작문이론의 교육적 접근

차호일 한국초등국어교육학회 2002 한국초등국어교육 Vol.21 No.-

작문이론은 작문교육 이론과 다르다. 작문이론을 교육적으로 여과시켰을 때 실제적인 작문교육이론이 된다. 혼재하고 있는 작문이론을 교육적으로 들여다보기를 했다. 교육목표를 중심으로 접근해 보았을 때 형식적 목표 작문교육이론, 개인적 목표 작문교육이론, 사회적 목표 작문교육이론으로 분류해 볼 수 있고 교육내용을 중심으로 접근해 보았을 때 지식·기능중심 작문교육이론, 전략중심 작문교육이론으로 나눌 수 있고 교육방법적 접근을 해보았을 때 결과중심 작문교육이론, 과정중심 작문교육이론, 그리고 후기과정중심 작문교육이론으로 매김할 수 있었다. 이 모든 것은 훌륭한 글을 쓰기 위한 이론적 도구에 불과할 뿐이다. 작문교육의 목표는 좋은 글은 쓰는 데 있다. 좋은 글을 쓰기 위해서는 상황에 따라 이런 이론적 도구들을 적절히 활용할 수 있어야 한다. 그러기 위해서는 현장의 교사들은 이런 작문교육이론에 대해 모두 통달해 있어야 한다. 최근 컴퓨터 언어의 발달로 컴퓨터상에 이루어지는 작문교육이 새로운 작문과제로 대두되고 있다. 작문교육은 이에 대비할 필요가 있다. A composition theory is differ from education of composition theory. When composition theory is filtered in education. it becomes practical education of composition theory. I studied various composition theory from an educational viewpoint. Seeing from an educational goal viewpoint, education of composition theory is classfied to formal goal composition education theory, individual goal composition education theory, and social goal composition education theory. Seeing from an educational contents viewpoint, it is classified to knowledge-function centered composition education theory and strategy centered composition education theory. Seeing from an educational method viewpoint, it is classified to effect centered composition education theory, process centered composition education theory and post-process centered composition education theory. The above statement is nothing but theoretical means to write good sentence. The goal of composition education is to write good sentence. To write good sentence, we have to use properly above composition theory in accordance with composition situation. Therefore our teachers must know throughly above composition education theory. Recently, on growing computer language, composition education in computer raises its head in our composition class, our composition education must be prepared for composition education in cyber space.