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Purification and Characterization of Recombinant Murine Endostatin in E. coli
You, Weon-Kyoo,So, Seung-Ho,Lee, Hyosil,Park, Sun-Young,Yoon, Mi-Ran,Chang, Soo-Ik,Kim, Hyun-Kyung,Joe, Young-Ae,Hong, Yong-Kil,hung, Soo-Il 가톨릭대학교 2000 Bulletin of The Catholic Research Institutes of Me Vol.28 No.-
Endostatin, a carboxyl-terminal fragment of collagen X VIII is known as an anti-angiogenic agent, that specifically inhibits the proliferation of endothelial cell and the growth of several primary tumor. We report here the purification and characteriztion of recombinant murine endostatin (rmEndostain) which was expressed in a prokaryotic expression system. This rmEndostatin has similar physiochemical properties of Yeast-produced recombinant endostatin, and it also specifically inhibits the proliferation and migration of bovine capillary endothelial cells stimulated by basic fibroblast growth factor. The biological activity of rmEndostatin was also shown by its anti-angiogenic ability on the chorioallantoc membrane of chick embryo in vivo. In this article we demonstrate the refolding and purification of rmEndostatin expressed suing E. coli system, to a biologically active and soluble from. In addition, these results confirm the activity of endostain as a potent anti-angiogenic agent. (Experimental and Molecular Medicine 31(4):197-202, 1999)
( Hee-kyung Lee ),( Hyun-sook Choi ),( Ki-an Cho ),( On-you Choi ),( Ha-young Koh ),( Ran Kim ),( Du-bok Choi ) 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.1
This research was to study effect of Solanum melongena extract on the xanthine oxidase (XO) inhibitory, nitrite scavenging (NC), and angiotensin I-converting enzyme (ACE) inhibitory activities. All the extracts inhibited the XO and ACE activities in a dose dependent manner. Especially, among various extracts, when 6.0 mg/mL of acetone extract was used, the maximum activity of XO inhibitory was obtained, 65.2%. On the other hand, in the case of methanol and ethanol extracts, they ranged of 61.5 to 62.4%. Acetone extract had a high phenolics and flavonoid concentration compared to other extraxts. Maximum NC activity using hot water extract at pH 1.2 was occurred, 68.7%. ACE inhibitory activity was significantly different among the various extracts at 6.0 mg/mL, values ranged from 35.26 to 56.7%. Especially, when 6.0 mg/mL of methanol and ethanol extracts were used, the highest ACE inhibitory activities were obtained, 57.3 and 56.7%, respectively. These results suggest that XO inhibitory, NC, and ACE inhibitory activities of S. melongena extract were strongly affected by extractant.
Effect of polysaccharide of Salicornia herbacea on antioxidant and nitrite scavenging effects
Hee-Kyung Lee(이희경),Hyun-Sook Choi(최현숙),Ki-An Cho(조기안),On-You Choi(최온유),Ha-Young Koh(고하영),Ran Kim(김란) 한국화장품미용학회 2016 한국화장품미용학회지 Vol.6 No.2
This research is to study effect of polysaccharide obtained from S. herbacea on antioxidant and nitrite scavenging effect. Neutral sugar, uronic acid, and protein concentrations of polysaccharide were 52.68, 0.54, and 7.21%, respectively. Among neutral sugars, glucose and mannose were the major ones of the sugar moiety with molar ratio of 14.52 and 11.28, respectively. The maximum DPPH radical scavenging, hydroxyl radical scavenging, chelating, and hydrogen peroxide scavenging activities at 7 mg/mL were obtained, 69.04, 58.07, 60.21, and 62.54%, respectively. However, in the case of reducing power, it was OD 0.62 at 9.0mg/mL. The maximum nitrite scavenging activity was obtained, 76.77 % at 9 mg/mL and pH 1.5. These results indicate that the polysaccharide obtained from S. herbacea has good potential to be used as a source of materials or additives for oxidation suppressant in food, cosmetics and drug compositions.
Recent developments and key barriers to advanced biofuels: A short review
Oh, You-Kwan,Hwang, Kyung-Ran,Kim, Changman,Kim, Jung Rae,Lee, Jin-Suk Elsevier 2018 Bioresource Technology Vol.257 No.-
<P><B>Abstract</B></P> <P>Biofuels are regarded as one of the most viable options for reduction of CO<SUB>2</SUB> emissions in the transport sector. However, conventional plant-based biofuels (e.g., biodiesel, bioethanol)’s share of total transportation-fuel consumption in 2016 was very low, about 4%, due to several major limitations including shortage of raw materials, low CO<SUB>2</SUB> mitigation effect, blending wall, and poor cost competitiveness. Advanced biofuels such as drop-in, microalgal, and electro biofuels, especially from inedible biomass, are considered to be a promising solution to the problem of how to cope with the growing biofuel demand. In this paper, recent developments in oxy-free hydrocarbon conversion via catalytic deoxygenation reactions, the selection of and lipid-content enhancement of oleaginous microalgae, electrochemical biofuel conversion, and the diversification of valuable products from biomass and intermediates are reviewed. The challenges and prospects for future development of eco-friendly and economically advanced biofuel production processes also are outlined herein.</P> <P><B>Highlights</B></P> <P> <UL> <LI> With 2DS, the biofuels’ transport-fuel share will be 30.7% by 2060. </LI> <LI> Recent studies on advanced biofuels from different inedible feedstocks are reviewed. </LI> <LI> Important technical barriers to drop-in, algal, and electro biofuels are discussed. </LI> <LI> Biofuel deoxygenation, oleaginous algae, and electro-fermentation are emphasized. </LI> </UL> </P>