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<P><B>Abstract</B></P> <P>Heme oxygenase-1 (HO-1) has an anti-inflammatory action in acute pancreatitis (AP). However, its mechanism of action and natural compounds/drugs to induce HO-1 in pancreas are not well understood. In this study, we investigated the regulatory mechanisms of HO-1 during AP using desoxo-narchinol-A (DN), the natural compound inducing HO-1 in the pancreas. Female C57/BL6 Mice were intraperitoneally injected with supramaximal concentrations of cerulein (50 μg/kg) hourly for 6 h to induce AP. DMSO or DN was administered intraperitoneally, then mice were sacrificed 6 h after the final cerulein injection. Administration of DN increased pancreatic HO-1 expression through activation of activating protein-1, mediated by mitogen-activated protein kinases. Furthermore, DN treatment reduced the pancreatic weight-to-body weight ratio as well as production of digestive enzymes and pro-inflammatory cytokines. Inhibition of HO-1 by tin protoporphyrin IX abolished the protective effects of DN on pancreatic damage. Additionally, DN treatment inhibited neutrophil infiltration into the pancreas via regulation of chemokine (C-X-C motif) ligand 2 (CXCL2) by HO-1. Our results suggest that DN is an effective inducer of HO-1 in the pancreas, and that HO-1 regulates neutrophil infiltration in AP via CXCL2 inhibition.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Desoxo-narchinol-A (DN) is a natural compound of HO-1 inducer in pancreas. </LI> <LI> Mechanism of DN-induced HO-1 is mediated by MAPK/Activator Protein-1/HO-1 signaling. </LI> <LI> DN-induced HO-1 blocks neutrophil infiltration into pancreas via inhibition of CXCL2. </LI> <LI> DN inhibits cerulein-induced acute pancreatitis (AP) and AP-associated lung injury. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
A recent study reported that p53 can induce HO-1 by directly binding to the putative p53 responsive element in the HO-1 promoter. In this study, we report that nutlin-3, a small molecule antagonist of HDM2, induces the transcription of HO-1 in a transcription-independent manner of p53. Nutlin-3 induced HO-1 expression at the level of transcription in human cancer cells such as U2OS and RKO cells. This induction of HO-1 did not occur in SAOS cells in which p53 was mutated and was prevented by knocking down the p53 protein using p53 siRNA transfection, but not by PFT-alpha, an inhibitor of the transcriptional activity of p53. Accompanying HO-1 expression, nutlin-3 stimulated the accumulation of ROS and the phosphorylation of MAPKs such as JNK, p38 MAPK and ERK1/2. Nutlin-3-induced HO-1 expression was suppressed by TEMPO, a ROS scavenger, and chemical inhibitors of JNK and p38 MAPK but not ERK1/2. In addition, nutlin-3-induced phosphorylation of JNK but not p38 MAPK was inhibited by TEMPO. Notably, the levels of nutlin-3-induced ROS were correlated with the mitochondrial translocation of p53 and this induction was prevented by PFT-beta, an inhibitor of the mitochondrial translocation of p53. Consistent with the effect of the ROS scavenger and MAPK inhibitors, PFT-beta reduced HO-1 expression and the phosphorylation of JNK induced by nutlin-3. In the experiments of analyzing cell death, the knockdown of HO-1 augmented nutlin-3-induced apoptosis. Collectively, these results suggest that nutlin-3 induces HO-1 expression via the activation of both JNK which is dependent on ROS generated by p53 translocated to the mitochondria and p38 MAPK which appears to be stimulated by a ROS-independent mechanism, and this HO-1 induction may inhibit nutlin-3-induced apoptosis, constituting a negative feedback loop of p53-induced apoptosis.
배상훈 ( Sang Hoon Bae ),김동현 ( Dong Hyun Kim ),배영석 ( Young Seok Bae ),이광재 ( Kwang Jae Lee ),김동완 ( Dong Wan Kim ),윤정빈 ( Jeoung Bin Yoon ),홍준호 ( Joon Ho Hong ),김상현 ( Sang Hyun Kim ) 대한간학회 2010 Clinical and Molecular Hepatology(대한간학회지) Vol.16 No.2
Toxic hepatitis has been reported as a major cause of acute hepatitis, but its potential induction by herbal remedies and/or health foods is usually neglected. We experienced a case of toxic hepatitis associated with Polygoni multiflori, a Chinese herb commonly known as Ho-Shou-Wu. A 54-year-old woman consumed Ho-Shou-Wu for 1 month, after which she experienced fatigue and overall weakness. A diagnosis of toxic hepatitis was made based on her clinical history, the findings for viral markers and other laboratory data, and ultrasonography. Her condition improved considerably after she stopped taking Ho-Shou-Wu. However, she resumed taking Ho-Shou-Wu immediately after discharge from hospital, which aggravated her symptoms and liver function. She was immediately readmitted and stopped taking Ho-Shou-Wu. Her relapse into hepatitis immediate after resuming consumption of the herb is strongly indicative of the validity of Koch`s postulate in this case.
Objective : To evaluate effect of allergy by Tripterygiwn regelii (TR), the biochemical changes associated with allergy were measured in BALF. serum splenocyte and lung of mice. Methods : After induction of allergic inflammation asthma by treatment of ovalbumine, water extracts from stem and leaf (SL) or flower (FL) of TR were taken orally for five successive days on mice, respectively. Result : In the total cell of BALF. the SL-TR extract (lCKhwk, h.w)-treated group was significantly reduced compared to control level and the reduction of eosinophil showed significantly at concentraton of 360 and loo0 dks, b.w. On the other hand, substantial decrease in IgE antibody formation was significantly observed by administration with SL-TR extract, whereas IgGZa was not affected. IgCl antibody formation appeared to be decreased inserum from SL-TR treated mice(l000 mg/kg, b.w). The content of IL-4 exhibited physiological role in splenocyte and lung was significantly reduced in the examined group compared to that of control after treatment of SL-TR extract(l@X/kg, b.w). In the case of IL-5, however, it was significantly reduced by FL-TR extract. In addition, IL-5 content in splenocyte was significantly reduced at concentration of 360 and loo0 d k g . b.w. by SL-TR dose, respxtively, and that of lung was significantly reduced dose-dewndently(l20, 360 and 1000mp/kg, b.w). Cnnclusion : It could be conduded that TripteTygiwn regelii showed beneficial effect on the allergic asthma and especially, its leaf and stem is more effective than flower.
우리나라 산림행정 업무의 대부분은 서류 및 대장에 의존하고 있는 실정으로 신속, 정확하고 다양한 업무 처리를 위해서는 첨단의 공잔정보기술을 이용한 과학적인 산림정보 관리시스템의 개발이 시급하다. 특히 지리정보시스템(GIS)과 항공사진 활용기술의 도입은 산림이용기본계획이나 산지개발, 산림자원 관리 및 산림보호 정책 등의 의사결정지원에 효율적으로 기여할 수 있을 것이다. 본 연구에서는 GIS와 항공사진(1998년도 촬영)을 기반으로 주요 산림정보인 수치지도, 수치임상도, 임야도 및 관련 속성데이터 둥을 가공하여 DBMS(data base management system) 내에 저장하였으며, 이를 기반으로 세부 응용시스템인 지번별 임야정보 검색, 산지이용개발 정보관리, 법정제한림 정보관리, 산림자원 정보검색 등의 인터페이스를 개발함으로써 산림 관련 실무자가 산림정보의 종합적인 공간분석 및 질의 검색이 가능한 산림정보 관리시스템을 구축하였다. 본 시스템의 구축으로 산림의 효율적 관리는 물론, 경제적인 산림자원 및 임산업 육성과 쾌적한 산림환경을 조성할 수 있을 뿐만 아니라 관련 부서들 간의 표준화된 공간 자료 공유와 과학적인 정보체계의 연동으로 산림자원 관리를 위한 집약된 공간 및 전자 정보화 인프라 구축의 기반을 마련할 것으로 사료된다. Recently in order to more effectively and scientifically process forest official tasks, which have been focused on documents and inventories, they should be applied with the up-to-date spatial information technologies. Especially, the forest resource information management based on GIS (geographic information system) and aerial orthophoto is expected not only to play an important role as DSS (decision support system) for domestic forest conservation policy and forestry development industry but also to service forest resource information toward people such as the owners of a mountain rapidly. In this study, the important forest information such as digital topography map, digital forest type map, digital forest cadastral map, digital aerial photographs and attribute data were first reprocessed and constructed in DBMS (data base management system). In addition, forest officials could analyze and retrieve forest information by using detail sub-application systems such as forest cadastral retrieval, forest land development information management, reserved forest information management and forest resource information retrieval. For this, the user interface is developed by using Visual Basic 6.0 and MapObjects 2. 1 of ESRI based on CBD (component based development) technology. The result of developing this system will not only perform constructing economical forest and better environment but also be the foundation of domestic spatial technology for forest resource management.
Kim, Se-Jin,Ho Hur, Joon,Park, Channy,Kim, Hyung-Jin,Oh, Gi-Su,Lee, Joon No,Yoo, Su-Jin,Choe, Seong-Kyu,So, Hong-Seob,Lim, David J,Moon, Sung K,Park, Raekil Nature Publishing Group 2015 Experimental and molecular medicine Vol.47 No.2
<P>Bucillamine is used for the treatment of rheumatoid arthritis. This study investigated the protective effects of bucillamine against cisplatin-induced damage in auditory cells, the organ of Corti from postnatal rats (P2) and adult Balb/C mice. Cisplatin increases the catalytic activity of caspase-3 and caspase-8 proteases and the production of free radicals, which were significantly suppressed by pretreatment with bucillamine. Bucillamine induces the intranuclear translocation of Nrf2 and thereby increases the expression of γ-glutamylcysteine synthetase (γ-GCS) and glutathione synthetase (GSS), which further induces intracellular antioxidant glutathione (GSH), heme oxygenase 1 (HO-1) and superoxide dismutase 2 (SOD2). However, knockdown studies of HO-1 and SOD2 suggest that the protective effect of bucillamine against cisplatin is independent of the enzymatic activity of HO-1 and SOD. Furthermore, pretreatment with bucillamine protects sensory hair cells on organ of Corti explants from cisplatin-induced cytotoxicity concomitantly with inhibition of caspase-3 activation. The auditory-brainstem-evoked response of cisplatin-injected mice shows marked increases in hearing threshold shifts, which was markedly suppressed by pretreatment with bucillamine <I>in vivo</I>. Taken together, bucillamine protects sensory hair cells from cisplatin through a scavenging effect on itself, as well as the induction of intracellular GSH.</P>
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
Although the Saemaeul Movement has contributed Significantly on the development of the country and rural area, the degree of importance has been reduced toward the eighties and the driving method has become out-of-fashioned. As a result, it is urgent for us to shift the direction to the improvement for the country and rural community in the nineties. In order for the Saemaeul Movement to develop and succeed as a national campaign. We have to make an effort to reestablish the orientation of it (the Saemaeul Movement) by means of consistent self-renovation and affirmative judgement to the concerned authorities. Furthermore, they should reinforce the countervailing power to face the rapid local and international change of circumstances positively. In this point of view, so as to promote the economical development of Chung-buk Province, We should avoid the conventional attitude, that is, to appeal to the central government. The reason is since the central government has to establish and execute the polices of national economy which deals with a lot of polices concerning various regions as a whole, it must consider the balanced development among the regions and arrange the conflict of their interests. Accordingly, the feasibility or advantage of any peculiar region can not be dealt with a special consideration in the level of the national economy. Therefore, in order to advance the economical development of the Chung-buk Province, We should not depend on the favorite arrangement of the central government, but pull the wisdom of the entire Chung-buk residents with the local industrialists and businessmen as leading members. Also, to get the common concensus of the Chung-buk residents, We must show the reality of the present condition of Chung-buk economy frankly and explain what disadvantage they will have when they neglect the difficult situation of the Chung-buk economy. In building an industrial complex, We must try to meet the change of the industrial structure in relation to the high-tech industry and especially vitalize the agricultural-industrial site continuously to establish it as a local industrial base for the future development. By studying the relationship between the industrial complex and the agricultural-industrial site, the concerned authority must plan the policies with reason and long-term consideration. In summary, to keep the Saemaeul Movement as a source of energy for the national development, We should reflect the people's opinion on the policies and so increase the countervailing power in the political, social and cultural aspect to meet the future. On the basis of reasonability that the source of national driving power should come from the community, We must extend the new living field by cultivating our local areas. With doing so, We can gain the advantageous effect of the concrete economy by the internalization of the Spiritual economic movement, so called the Second economic movement, with a lot of campaigns, such as "Let's make Chung-ju green", "Let's revive Mu-Sim Stream", and "Let all the Chung-buk residents have the same mind."
In the vector controlled induction motor drives which are widely used in recent years, the speed information becomes mandatory. However, installing the speed sensors on the existing motors costs much, and is not easy under certain environment. In addition, several sensor noise can happen to make the wide applications of the high performance vector controlled induction motor drives restricted. In this paper, we propose fuzzy control algorithem for control torque of induction motor without speed sensor. The prorosed controller shows a good dynamic response and decoupling characteristics.
This paper is aimed to investigate general trends and patterns of the effects of microelectronics on the quantity and quality of work in the advanced countries. The contents are constrctured as follows ; Chapter 1 deals with introduction. Chapter 2 outlines the perspectives of economic sociology which have been developed to analyse technologial change at work. Chapter 3 examines the diffusion of ME and changes on the quality of work. it concentrates specifically on technological effects of lebour process at workplace level, in particular the influence of ME on changes in work tasks, skills, job contents, work organisation and the way in which labour-management are negotiating each other. Chapter 5 draws together the arguments and findings in previous chapters. In short, First, it is necessary to explore not only quantum of work, but also its quality to understand the labour problems of ME. Secondly, findings of a number of case studies suggest that similar changes, namely the importance of the role of Joint Consultation Participation and Cooperation are gradually growing in a considerable number of industries to solve its labour problems. Thus, the ways to solve labour problems will be opened only when the labour and management are able to make the cooperative culture of rationalisation with their great effort of will to cope with new era of microelectronics.