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merB基因的序列修饰及转基因烟草对有机汞的高抗作用 被引量:4
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作者 田吉林 沈瑞娟 何玉科 《科学通报》 EI CAS CSCD 北大核心 2002年第23期1815-1819,共5页
由于汞污染对环境和生物的严重危害性,汞污染的治理越来越受到人们的重视.而植物修复具有经济、高效等优点,有望成为汞污染土壤修复的主要手段.通过植物基因工程方法,将细菌中催化甲基汞转变为离子汞的merB基因进行序列改造,通过农杆菌... 由于汞污染对环境和生物的严重危害性,汞污染的治理越来越受到人们的重视.而植物修复具有经济、高效等优点,有望成为汞污染土壤修复的主要手段.通过植物基因工程方法,将细菌中催化甲基汞转变为离子汞的merB基因进行序列改造,通过农杆菌的介导转入烟草,Southem杂交检测证明得到转基因植株.转基因植株后代对有机汞表现较强的抗性,在水培条件下,有些转基因株系抗2.5μmol/L的醋酸苯汞(PMA),而0.1μmol/L的PMA则杀死野生型烟草的幼苗.随着处理浓度的升高,PMA对幼苗生长的抑制作用逐渐增强.此项研究为培育抗汞烟草,修复汞污染的土壤进行了有益的探索. 展开更多
关键词 序列修饰 转基因烟草 高抗作用 merB基因 有机汞 植物修复 植物基因工程 土壤汞污染
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Study of Analgesic and Anti-inflammatory Effects of Lappaconitine Gelata 被引量:32
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作者 王英姿 肖勇庆 +1 位作者 张超 孙秀梅 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2009年第2期141-145,共5页
Objective: To explore the analgesic and anti-inflammatory effects of lappaconitine gelata (LA). Methods: The writhing response induced by acetic acid, the pain response induced by formaldehyde and hot plate method in ... Objective: To explore the analgesic and anti-inflammatory effects of lappaconitine gelata (LA). Methods: The writhing response induced by acetic acid, the pain response induced by formaldehyde and hot plate method in the mouse, and the paw edema induced by egg albumen in the rat and the ear edema induced by xylene in the mouse were used for investigation on the analgesic and anti-inflammatory effects of LA. Results: The writhing response induced by acetic acid, the pain response induced by formaldehyde and hot plate methods was significantly inhibited by LA. In addition, the paw edema induced by egg albumen in the rat and the ear edema induced by xylene in the mouse were all significantly suppressed by LA. Conclusion: LA has the analgesic and anti-inflammatory effects. 展开更多
关键词 lappaconitine gelata PHARMACODYNAMICS analgesic effect anti-inflammatory effect animal test
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Antioxidant and hepatoprotective effect of different extracts of Guizhencao (Herba Bidentis Bipinnatae) against liver injury in hyperlipidemia rats 被引量:1
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作者 Xichao Xia Yuhong Ma +5 位作者 Xiankun Xing Chuanfeng Huang Ling Li Gaixia Gui Qingchun Liu Shipeng Xue 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2013年第4期518-523,共6页
OBJEVTIVE: To investigate the antioxidant and hepatoprotective properties of the different extracts Guizhencao (Herba Bidentis Bipinnatae) against liver injury in hyperlipidemia rats. METHODS: The rats were divided in... OBJEVTIVE: To investigate the antioxidant and hepatoprotective properties of the different extracts Guizhencao (Herba Bidentis Bipinnatae) against liver injury in hyperlipidemia rats. METHODS: The rats were divided into 7 groups, with 10 rats in each. Rats were treated with high-fat diet for 18 weeks besides the normal control group, then rats in both normal control and model groups were received 5 mL/kg -1 · day -1 of saline and those in the positive control group with 2 mg/kg -1 · day -1 of lovastatin. Rats in the positive control group and different Guizhencao (Herba Bidentis Bipinnatae) extracts treatment groups (ethyl acetate extract group, n-hexane extract group, ethanol extract group, and aqueous extract group) were treated with corresponding extract at a concentration of 5 mL/kg -1 · day -1 . After 8 weeks treatment, all rats were sacrificed and total blood samples were collected. Histological analysis of liver was underdone by hematoxylin and eosin. The levels of serum ala-nine aminotransferase (ALT), aspartate aminotransferase (AST), glouse (GLU), cholesterol (TC), triglycerides (TG), low-density lipoprotein-cholesterol (LDL-C) and high-density lipoprotein-cholesterol were measured according to standard procedure using auto-analyzer. The superoxide dismutase (SOD) and malondialdehyde (MDA) levels in liver were ananlyzed by procedure instruction. RESULTS: The histopathological analysis implied that the administration of Guizhencao (HerbaBidentis Bipinnatae) extracts resulted in hepatoprotective role compared with that of the model group. In addition, the high-fat diet caused a remarkable increase of ALT, AST, GLU, TC, TG, LDL-C and MDA levels. A decline in HDL-C and SOD concentrations and a reversal of effects were observed in different Guizhencao (Herba Bidentis Bipinnatae) extracts groups, especially in the aqueous extract and ethanol extract groups. CONCLUSION: The different extracts of Guizhencao (Herba Bidentis Bipinnatae) can play a protecting role against liver injury in hyperlipidemia rats maybe through decreasing ALT, AST, GLU, TC, TG, LDL-C and MDA levels and enhancing the liver anti-oxidative ability. 展开更多
关键词 Bidens Antioxidants Drug-induced liver injury Hyperlipidemias
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