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- 저자 : Jhong-Jae Lim (검색결과 3 건)
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AKAP12 regulates vascular integrity in zebrafish
Hyouk-Bum Kwon,최윤경,Jhong-Jae Lim,Seung-Hae Kwon,허송욱,김현진,Kyung-Joon Lim,안종찬,Young-Myeong Kim,배문경,박정애,정철호,Naoki Mochizuki,김규원 생화학분자생물학회 2012 Experimental and molecular medicine Vol.44 No.3
The integrity of blood vessels controls vascular permeability and extravasation of blood cells, across the endothelium. Thus, the impairment of endothelial integrity leads to hemorrhage, edema, and inflammatory infiltration. However, the molecular mechanism underlying vascular integrity has not been fully understood. Here, we demonstrate an essential role for A-kinase anchoring protein 12 (AKAP12) in the maintenance of endothelial integrity during vascular development. Zebrafish embryos depleted of akap12(akap12 morphants) exhibited severe hemorrhages. In vivo time-lapse analyses suggested that disorganized interendothelial cell-cell adhesions in akap12 morphants might be the cause of hemorrhage. To clarify the molecular mechanism by which the cell-cell adhesions are impaired, we examined the cell-cell adhesion molecules and their regulators using cultured endothelial cells. The expression of PAK2, an actin cytoskeletal regulator, and AF6, a connector of intercellular adhesion molecules and actin cytoskeleton, was reduced in AKAP12-depleted cells. Depletion of either PAK2 or AF6 phenocopied AKAP12-depleted cells,suggesting the reduction of PAK2 and AF6 results in the loosening of intercellular junctions. Consistent with this, overexpression of PAK2 and AF6 rescued the abnormal hemorrhage in akap12 morphants. We conclude that AKAP12 is essential for integrity of endothelium by maintaining the expression of PAK2 and AF6during vascular development.
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Kim, Joo-Il,Park, Sang-Wook,Lim, Jhong-Jae,Sohn, Se-Il,Shin, Ji-Su,Park, Sang Cheol,Jang, Young Pyo,Chung, Eun Kyoung,Lee, Hong-Woo,Lee, Kyung-Tae De Gruyter Open 2017 Acta pharmaceutica Vol.67 No.4
<P>In this study, we investigated the gastroprotective effect of an isopropanol extract from the aerial parts of Artemisia princeps (IPAP) and developed a gastroretentive floating tablet of IPAP (IPAP-FR) for maximized local gastroprotective effects. Pre-treatment with IPAP ameliorated the gastric mucosal hemorrhagic lesions in ethanol/HCl-or indomethacin- treated rats. IPAP decreased mucosal hemorrhage of gastric ulcers induced by ethanol or indomethacin plus pyloric ligation in rats. The optimized floating tablet, IPAP-FR, floated on medium surface with more sustained eupatilin release compared to the non-floating control tablet. X-ray photographs in beagle dogs showed that IPAPFR was retained for > 2 h in the stomach. In the ethanol-induced gastric ulcer rat model, the gastric hemorrhagic lesion was improved more substantially with IPAP-FR compared to the non-floating control tablet. Based on these data, our data suggest that IPAP-FR has an improved therapeutic potential for the treatment of gastric ulcer.</P>
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열대산 도입마(Dioscorea alata L.)의 생육과 괴경비대
장광진(Kwang Jin Chang),박종인(Jhong In Park),김선림(Sun Lim Kim),박주현(Ju Hyun Park),박병재(Byoung Jae Park) 한국자원식물학회 2002 한국자원식물학회지 Vol.15 No.3
도입 마(Dioscorea alate L.) 계통 중 품질이 우수하고 이 용 가치가 기대되는 열대산 마(D. alata)를 우리나라에서 재배 시 그 가능성과 제 기관의 생육특성을 밝히기 위하여 실시하였다 D. alata. 및 D. opposita의 생육패턴 및 수량성을 비교 도입 재배 가능성을 시험하였다. 1. 4월 하순에 정식한 마의 지상부는 70일까지는 완만한 생육을 보였으나, 그후에 급격히 생장하여, 200일 이후 지상부의 하부가 낙엽지며 감소하였다. 생육은 D. atara, 단마 순이였다. 2. 도입마(D. alate)의 형성은 정식 50일 정도에서 일어났으나, 그 후 비대생장이 늦어서 150일 이후에 급격 히 비대하였다. 3. D. alata(도입마)의 일반성분은 D. opposita(단가) 보다 단백질, 섬유, 지방의 함량이 낮았다. 4. D. alata의 경도를 보면 2696.2로 D. opposita 4946.9 보다 약 2배정도 낮고, 색도 중 명도(L)는 D. alata가 73.99으로 D. opposite 보다 높았다. This study was carried out to determine agronomic and genetic characteristics of the production process in tropical yams(Dioscorea atata L.). To make clear the possibility of cultivation of tropical yams in the Suwon area, the growth of the aboveground parts and the enlargement of tuber of Dioscorea alata, were investigated. The aboveground parts of the plants whose sprouted mother tuber were planted in late April were grown slowly until the 70-days after planting and grown rapidly after. from about 150-days after plantation, total length of vines slowly decreased due to the burning of the branch vines of lower modes. With regard to the branching progressed to 4th for the solo yam and to 6th for purple yam. The secondary branches tended to grow better. When the formation of daughter tubers was observed at the 50-days after planting, their enlargement was very slow. The rapid growth of tubers began at the 140-days and continued to the 190-days. General components such as protein, fiber, and lipid were higher in D. opposita rather than in D. alata. Hardness of D. alata was 2696.2 while that of D. opposita was 4946.9. Lightness of D. alata was 73.99, being higher than that of D. opposita.
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