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백서의 뇌 별아교세포에서 LipopolysaccharideⅠ에 의한 Nitric Oxide 생성기전
소광,박래길,이상렬,박민철 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.4
연구목적 : Nitric oxide(NO)는 뇌졸중 및 여러 가지 신경변성 질환의 병리생리에 중요한 역할을 한다. 본 연구는 백서 뇌로부터 분리한 별아교세포에서 세균내독소 lipopolysaccharide(LPS)에 의한 NO 생성과정이 MAP kinase cascades와 전사 활성인자 NF-kB에 의해 중재됨을 밝히고자 하는 것이다. 방 법 : NO 생성은 Greese's reagents와 Western blot analysis를 사용하여 측정하였고 E가, JNK1. p38은 in vitro immunecomplex kinase assay로 측정했다. NF-kB의 전사적 활성은 electrophoretic mobility shift assay로 결정하였다. 결 과 : LPS는 nitric oxide(NO) 생성과 iNOS 단백질의 발현 증가를 유도하였다. LPS에 의한 NO 생성은 MAP kinases인 Erk 및 JNK/SAPK의 효소적 활성억제제인 PD 098059와 curcumin에 의하여 억제되었으나 p38 활성억제제인 SB 203580에 의해서는 영향을 받지 않았다. 또한 LPS는 MAP kinases인 Erk, JNK/SAPK 및 p38의 효소적 활성을 증가시켰다. Ras 활성억제제도 LPS 자극에 의한 NO 생성을 감소시켰다. LPS에 의한 별아교세포 자극은 전사 활성인자 NFkB의 활성을 유도하였으나 이 활성은 PD 098059와 curcumin에 의하여 억제되었다. PKA는 JNK 활성의 억제기전을 통하여 별아교세포에서 LPS의 의한 NO 생성을 감소시켰다. 결 론 : 이 결과는 별아교세포에서 LPS에 의한 NO 생성과정이 MAP kinases와 전사 활성인자 NF-kB에 의해 활성화됨을 시사한다. Objecives : Nitric oxide(NO) plays an important role in pathophysiology of stroke and various neurodegenerative diseases. This study is designed to elucidate the mechanisms by which signaling pathway of LPS-stimulated NO generation in rat prmary astrocytes may be mediated by MAP kinase cascades and transcriptional activation of NF-kB. Method : The generation of NO from primary rat neonatal astrocytes was measured by using Greese's reagents and Western blot analysis with including Erk, JNKI and p38 was assessed by in vitro immunecomplex kinase assay. Activation of transcriptional activator, NF-kB, was determined by using electrophoretic mobility shift assay. Results : Treatment of cultured rat primary neonatal astorcytes with LPS results in the generation of NO as well as increase in the expression of inducible nitric oxide synthase(iNOS). LPS-induced No generation is inhibited by the addition of inhibitors of MEK and JNKI/SPAK, PD 98059 and curcumin. LPS also imcreases the phosphotransferase activity of Erk as well as JNKI and increases the phosphorylation of p38. Inhibition of Ras results in decrease of LPS-inudced NO generation. cAMP decreases the LPS-induced NO generation via inhibition of JNKI. Furthermore LPS activates transcriptional activator, NK-kB which is inhibited by the addition of inhibitors of MEK and JNK. Conclusion : These data suggest that MAP kinases, especially Erk and JNKI, may mediate the signaling cascade of LPS-induced NO generation in rat primary activation of transcriptional factor, NF-kB.
SEK1 카이네이즈 과발현(overexpression)생쥐 대식세포주(RAW264,7)의 Nitric Oixde(NO)유도성 세포고사 (apoptosis) 기전에 관한 연구
정병학,소홍섭,박래길,정헌택 圓光大學校 醫科學硏究所 1998 圓光醫科學 Vol.14 No.2
Nitric oxide (NO) induces apoptotic cell death in murine RAW 264.7 macrophages. To A elucidate the NO-induced apoptotic mechanisms in SEK1/MKK4 overexpressed RAW 264.7 cells, we generated clones of RAW 264.7 cells which stably overexpressd kinase inactive SEK1 (RAW/SEK1-KI) or wild type SEK1 (RAW/SEK1-WT). Treatment of kinase inactive SEK1 transfected RAW 264.7 cells (RAW/SEK1-KI) with sodium nitroprusside (SNP), a NO donor, significantly decreased the cell viability than that of RAW control cells which were treated with the same amount of SNP. However, RAW/SEK1-WT cells were less susceptible to NO induced apoptosis. Furthermore, the treatment of NO with farnesyltransferase inhibitor (FTI) of Ras or MEK inhibitor (PD098059) significantly increased the apoptotic death of RAW/SEK1-KI. However, SB203580, a specific p38 inhibitor, did not affect NO-induced apoptosis of kinase inactive SEK1 transfected RAW 264.7 cells. For a while, caspase 3-like protease activity in NO plus FTI treated RAW/SEK1-KI cells were more increased than that of NO only. In addition, nuclear transcription factor kB (NFkB) was significantly activated in NO-treated RAW/SEK1-KI cells, whereas these transcriptional factor was not markedly activated in NO-treated RAW/SEK1-WT cells. Supershift analysis demonstrates that NFkB was composed of mainly p50 homodimer. Also pyrrolidine dithiocarbamate (PDTC), a strong inhibitor of NFkB, significantly inhibits the NO-induced apoptosis in RAW/SEK1-KI cells. Taken together, we suggest that SEK1 may play anti-apoptotic role in RAW cells from NO-induced apoptosis via the modulation of NFkB. In addition, in the absence of SEK1 kinase cascade activation, the viability of RAW cells may be mainly dependent on Ras/Raf/MEK/ERK pathway.
裵錫悌,宋之浩,李吉來,鄭興基,洪聖根,趙鳳坤,朴種洙 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.1
In order to develop the curriculum of the fishery department in the fisheries Jr. college, We have collected and analyzed the domistic and foreign data adquated to the fishey department under the international trend, also we gathered the opinion from the inquiring paper investigation and consultation to the industrial field, concerned college and graduate during the 6 month from September 1982. The fishery department curriculum in fisheries Jr. college will be industrialized with the concerned technics and knowledge in relation to speciality of maritime affairs. Accordingly, we have developed the adquate curriculum which is practical and can be cultivated the technician to adopt in the industrial society.
Park, Chan-Ny,Moon, Byung-Soon,Jeon, Seon-Bok,Kim, Nam-Song,Chung, Sang-Young,Park, Jin-Woo,Park, Rae-Kil The Physiological Society of Korean Medicine and T 2007 동의생리병리학회지 Vol.21 No.4
Sagunjatang (Sagunja), containing Radix Astragali, Radix Ginseng, Fructus Schizandrae, Radix Ophiopogonis and Radix Glycyrrhizae, has been used as a prescription for ischemic heart and brain diseases in Korean traditional medicine. This study was designed to investigate the protective mechanisms of Sagunja on $H_2O_2$-induced cytotoxicity of H9c2 cardiomyocytes. Treatment with $H_2O_2$ resulted in death of H9c2 cells, characterized by apparent apoptotic features, including the fragmentation of nucleus and increase in sub-GO/G1fraction of cell cycle. However, Sagunja markedly suppressed the apoptotic characteristics of H9c2 cells induced by $H_2O_2$ with decrease of intracellular peroxide level. In addition, Sagunja suppressed the features of mitochondrial dysfunction, including change of mitochondrial membrane potential, in $H_2O_2$- treated cells. Additionally, Sagunja induced the expression of HO-1 protein in both time-and dose-dependent manner. The role of HO-1 in ROS-scavenging activity of Sagunja is proposed.
유향물추출물의 HL-60 혈액암세포에서 세포사멸 유도효과
박래길(Rae-Kil Park),오광록(Kwang-Rok Oh),이광규(Kwang-Gyu Lee),문연자(Yeun-Ja Mun),김정훈(Joung-Hoon Kim),우원홍(Won-Hong Woo) 대한약학회 2001 약학회지 Vol.45 No.2
The possible mechanism of the antiproliferative and apoptotic effects of Boswellia carterii water extract were studied in HL-60 human leukemia cells. The cytotoxicity of HL-60 cells after the treatment of Boswellia carterii water extract showed dose- and time-dependent manner. The appototic effect of 300 mcg/ml Boswellia carterii water extract was demonstrated by DNA laddering. The activity of capase 3-like protease was markedly increased in HL-60 cells treated with Boswellia carterii water extract. Furthermore, the level of Bcl-2 was time-dependently reduced, whereas Bax protein level was enhanced by Boswellia carterii water extract treatment. In conclusion, our results suggest that apoptotic effect of Boswellia carterii water extract treatment. In conclusion, our results suggest apototic effect of Boswellia carterii water extract may partly mediated through activations of capase-3-activity, and Bax expression, and inhibition of Bcl-2 expression.