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Studies on Monoamine Oxidase Activity in Brain and Liver of Insulin Deficient Rats
나승열,김순재,Nah, Seung-Yeol,Kim, Soon-Jae 생화학분자생물학회 1985 한국생화학회지 Vol.18 No.1
Alloxan으로 백서에서 당뇨병을 유발시킨 간장과 뇌에서 mitochondria 바깥막에 존재하는 monoamine oxidase(MAO) 활동도를 측정하였다. 그 결과 대조군에 비하여 당뇨병군에서 기질에 대한 친화성이 뇌와 간장에서 각각 20, 40%감소하는 것으로 나타났으며, insuilin의 투여는 이 효소의 활동도를 대조군 수준 혹은 그 이상으로 상승시킴을 보여 주었다. 이러 한 사실은 insulin이 rat의 뇌와 간장의 mitochondria의 lipids환경에 의존하는 MAO의 활동도에 영향을 미치는 것으로 사료된다. Monoamine oxidase (MAO) activity was determined in brain and liver of alloxan induced diabetic rats. MAO affinity for substrate in diabetic group decreased in brain and liver by 20, 40% respectively, as compared to normal group. Insulin administration, however, restored the MAO affinity for substrate to normal level. Insulin, therefore, might play an important role in MAO activity that may depend on microenvironment of outer mitochondrial membrane in rat brain and liver.
정상민,이준호,윤인수,나승열,Jeong, Sang-Min,Lee, Jun-Ho,Yoon, In-Soo,Nah, Seung-Yeol 고려인삼학회 2005 Journal of Ginseng Research Vol.29 No.4
The $Ca^{2+}-activated$ chloride channel (CLCA) was activated by ginseng total saponin (GTS) in Xenopus oocytes. The reverse transcription PCR (RT-PCR) method was performed with gene specific primers on oocytes. The gene specific primers were deduced from spleen cDNA in expressed sequence tags (EST) database showing high homology to the mouse CLCA. Full length of cDNA sequence was completed by linkage of several 5' and 3'-half cDNA fragments have been sequenced. We named the full cDNA to oCLCA transiently. The oCLCA gene encodes a protein of 911 amino acids with $48.9\%$ identity overall to that of mouse CLCA (mCLCA4). A predicted oCLCA amino acids sequence shows the molecular weight of 108 kDa and has four or more transmembrane domains, and also the one hydrophobic Cterminal domain. oCLCA gene was expressed ubiquitously in various tissues included oocytes, also interfered in oocytes by siRNA for oCLCA. Here, we suggest that oCLCA is a endogenous chloride channel gene in oocytes. We are studying for the identification of oCLCA gene and further physiological research.
홍삼사포닌 투여의 다낭성난소에 의한 불임 치료효과 및 기작연구
김세은,오동민,심경미,정문진,임성철,나승열,이윤렬,강성수,문창종,김종춘,김성호,배춘식,Kim, Se-Eun,Oh, Dong-Min,Sim, Kyung-Mi,Jeong, Moon-Jin,Lim, Sung-Chul,Nah, Seung-Yeol,Lee, Yun-Lyul,Kang, Seong-Soo,Moon, Chang-Jong,Kim, Jong-Choon,Kim 한국현미경학회 2009 Applied microscopy Vol.39 No.1
사람에서의 PCO와 몇몇 측면에서 유사한, 실험적으로 유발된 다낭성난소(polycystic ovary, PCO)는 장기간 작용하는 estradiol valerate (EV)에 의해 유발된다. 랫드에서 스테로이드로 유발한 PCO 모델에서 홍삼 총사포닌의 역할에 대한 우리의 이전연구는 전침이 난소의 nerve growth factor (NGF) 농도를 조절하는 것을 검증하였다. 실제로 PCO와 관련된 난소 기능부전의 병리기전에서 신경성 요소의 관련성은 난소로의 교감신경유출(sympathetic outflow)의 증가로 인해 높아진다. 따라서 본 연구에서는 치료제로서의 GTS 투여가 PCO를 유발한 랫드에서 교감신경 활성을 조절할 것이라는 가설을 시험해보고자 하였다. 본 연구에서는 스테로이드로 유발한 PCO에 내재하고 있는 병태생리학적 과정과 연관된 NGF 단백질과 NGF mRNA를 분석함으로써 이루어졌다. PCO가 유발된 랫드에서 EV 대조군은 oil 대조군과 비교하였을 때 유의적으로 높은 NGF mRNA의 발현을 나타내었으며, GTS 투여군은 EV 대조군에 비해 유의적으로 낮은 NGF mRNA의 발현을 나타내었다. 그러나 NGF 단백질은 oil 대조군에 비해 EV 대조군과 GTS 투여군에서도 유의적인 변화를 발견할 수 없었다. 이러한 결과는 EV가 설치류에서 낭종 형성과 무배란을 유발하는 병리학적 단계의 구성요소일 수 있는 난소의 신경향성 단계(neurotrophic state)를 조절한다고 생각할 수 있다. Experimental induction of polycystic ovary (PCO) resembling some aspects of human PCO syndrome was produced using the long-acting compound estradiol valerate (EV). Our previous study on the role of Korean red ginseng total saponins (GTS) in a steroid-induced PCO rat model demonstrated that electro-acupuncture modulates nerve growth factor (NGF) concentration in the ovaries. In fact, the involvement of a neurogenic component in the pathology of PCO-related ovarian dysfunction is preceded by an increase in sympathetic outflow to the ovaries. In the present study, we tested the hypothesis that therapeutic GTS administration modulates sympathetic nerve activity in rats with PCO. This was done by analyzing NGF protein and NGF mRNA expression involved in the pathophysiological process underlying steroid-induced PCO. EV injection resulted in significantly higher ovarian NGF mRNA expression in PCO rats compared to control rats, and PCO ovaries were counteracted by GTS administration with significantly lower expression of NGF mRNA compared to EV treated ovaries. However, NGF protein was unaffected in both EV and GTS treated ovaries compared to control rats. These results indicate that EV modulates the neurotrophic state of the ovaries, which may be a component of the pathological process by which EV induces cyst formation and anovulation in rodents.
Xenopus laevis oocytes에서 진세노사이드에 의하여 활성화되는 Ca²+-activated Cl- 이온 통로의 유전자 클로닝, 조직 분포 및 채널 특성
정상민(Sang Min Jeong),이준호(Jun-Ho Lee),윤인수(In-Soo Yoon),나승열(Seung-Yeol Nah) 고려인삼학회 2005 Journal of Ginseng Research Vol.29 No.4
The Ca²+-activated chloride channel (CLCA) was activated by ginseng total saponin (GTS) in Xenopus oocytes. The reverse transcription PCR (RT-PCR) method was performed with gene specific primers on oocytes. The gene specific primers were deduced from spleen cDNA in expressed sequence tags (EST) database showing high homology to the mouse CLCA. Full length of cDNA sequence was completed by linkage of several 5' and 3'-half cDNA fragments have been sequenced. We named the full cDNA to oCLCA transiently. The oCLCA gene encodes a protein of 911 amino acids with 48.9% identity overall to that of mouse CLCA (mCLCA4). A predicted oCLCA amino acids sequence shows the molecular weight of 108 kDa and has four or more transmembrane domains, and also the one hydrophobic Cterminal domain. oCLCA gene was expressed ubiquitously in various tissues included oocytes, also interfered in oocytes by siRNA for oCLCA. Here, we suggest that oCLCA is a endogenous chloride channel gene in oocytes. We are studying for the identification of oCLCA gene and further physiological research.