共查询到17条相似文献,搜索用时 70 毫秒
1.
葛根素衍生物的合成及抗缺氧活性研究 总被引:1,自引:0,他引:1
目的设计并合成新的葛根素衍生物。方法针对葛根素水溶性差的缺点,在其4’位羟基引入烷胺基烷基,得到新的葛根素衍生物。通过小鼠抗缺氧试验和离体动脉条试验,评价了目标化合物的抗缺氧活性和扩血管活性。结果与结论合成了12个新的葛根素衍生物,初步药理实验结果显示,大多数化合物的抗缺氧活性等于或略强于葛根素,化合物P1、P2、P4、P5和P6均具有明显的扩血管活性,活性随剂量增加而增大,其中P1和P2扩血管活性强于葛根素。 相似文献
2.
目的:观察葛根素对高胰岛素环境下大鼠肝细胞一氧化氮(NO)合成的影响。方法:体外培养BRL大鼠肝细胞株,用高胰岛素诱导其形成胰岛素抵抗细胞模型,观察葛根素对肝细胞一氧化氮合成的影响。结果:葛根素可调节高胰岛素环境下大鼠肝细胞一氧化氮合酶(NOS)的活性,增加肝细胞NO的合成。结论:葛根素可通过适度调节肝细胞NO的产生,从而促进肝细胞对葡萄糖转化,改善肝细胞胰岛素抵抗的作用。 相似文献
3.
目的:探讨葛根素磺酸钠的抗心律失常作用。方法:用氯仿、乌头碱、哇巴因3种方法建立心律失常模型,比较葛根素磺酸钠与葛根素抗心律失常的作用。结果:葛根素磺酸钠和葛根素均能降低氯仿致KM小鼠心室纤颤的发生率,明显提高乌头碱致SD大鼠室性期前收缩、室性心动过速、室颤、心搏停止的阈剂量,明显提高哇巴因致EWG/B豚鼠室性期前收缩、室性心动过速、室颤、心搏停止的阈剂量,但葛根素磺酸钠的效果更好。结论:葛根素磺酸钠具有较好的抗心律失常的作用,为其临床治疗心律失常奠定基础。 相似文献
4.
5.
6.
7.
金婉冰 《中国临床药理学与治疗学》2013,18(8):864-867
目的:研究葛根素(Puerarin,Pue)对庆大霉素大鼠肾毒性的保护作用.方法:雄性SD大鼠给予溶媒或葛根素(50mg· kg-1·d-1)7 d后,再联合给予0.9%氯化钠注射液或庆大霉素140 mg/kg(i.p.)14 d,测定大鼠体重,血清尿素氮(BUN)、血肌酐(SCr)含量,计算肌酐清除率(CCr),测定肾组织中丙二醛(MDA)和一氧化氮(NO)含量和超氧化物歧化酶(SOD)及内皮一氧化氮合酶(eNOS)活性;HE染色观察肾脏病理改变.结果:与正常对照组比较,庆大霉素组可致大鼠体重、CCr、NO和SOD活性下降,血清BUN和SCr及肾组织MDA含量升高,肾脏病理改变明显.给予葛根素明显减轻上述改变.结论:葛根素有效拮抗庆大霉素所致的大鼠肾损害,可能通过其抗氧化作用及提高NO水平来发挥作用. 相似文献
8.
葛根素与阿斯匹林复方的降血糖作用 总被引:56,自引:0,他引:56
五十年代国内曾有人报道,葛根有降血糖作用。近年来,随着对葛根研究的深入,已证明异黄酮化合物葛根素(puerarin)是葛根的主要有效成分,有扩张血管、改善心肌代谢、降低高血压病人的血浆儿茶酚胺含量和抑制血小板聚集等作用。阿斯匹林也有多方面的药理作用,特别是能抑制前列腺素的合成、增加葡萄糖引起的胰岛素分泌、降血糖、降血脂,并能加强第二代口服降血糖药glipizide的降血糖作用。为了寻找既降血糖又能防治糖尿病心血管并发症的药物或复方,我们选用葛根素与小剂量阿斯匹林复方,对其降血糖、降血脂等作用进行了初步研究。 相似文献
9.
异黄酮哌嗪衍生物的合成 总被引:6,自引:1,他引:6
异黄酮类化合物广泛存在于植物中 ,具有多种生理活性 .以苯乙酸和间苯二酚为原料 ,合成了 9个异黄酮哌嗪衍生物 ,均未见文献报道 .其结构经过IR ,MS和1H NMR确证 . 相似文献
10.
目的 设计合成一系列NO供体型奥丙嗪,并考察它们的体外NO释放活性与抗炎活性。方法 以奥丙嗪为原料,利用其羧基将奥丙嗪与呋咱环结构或硝酸酯结构偶联起来,得到NO供体型奥丙嗪。结果与结论 合成11个NO供体型奥丙嗪衍生物,其中化合物Ⅰa、Ⅰg和Ⅱa~Ⅱd6个化合物为新化合物,目标化合物的结构经MS和^1H-NMR确认。呋咱环型化合物在体外能有效地释放出NO,大多数化合物仍保持抗炎活性。 相似文献
11.
葛根素对高血压患者血浆内皮素和一氧化氮的影响 总被引:29,自引:0,他引:29
目的:检测正常人与高血压病(EH)患者血浆内皮素、一气体氮的变化及葛根素对其的干预效应。方法:EH对照组口服苯磺酸氨氯地平5mg/d,或合和盐酸苯那普利10mg/d,每日一次,15d为一疗程。EH伍用治疗组同时合用5%GNS250ml+葛根素注射液400mg静滴,两组治疗前后检测血浆ET、NO水平变化。结果:EH各组血浆ET较正常人组均显著增高(P〈0.01),血浆NO水平及NO/ET比值除轻度E 相似文献
12.
San-Yin Zhang Pei-Feng Wei Xiu-Shen Huang Yong Dai 《Journal of Asian natural products research》2013,15(4):323-328
Puerarin (1) is a major effective ingredient extracted from the traditional Chinese medicine Ge-gen (Radix Puerariae, RP). Recently, puerarin has been used to treat patients with coronary artery diseases (CAD). However, the mechanisms of puerarin on CAD are still not very clear. In this study, we investigated the role of puerarin on serum nitric oxide (NO) concentration, myocardial endothelial nitric oxide synthase (eNOS) gene expression, the protein expression of eNOS and inducible nitric oxide synthase (iNOS), as well as the level of protein kinase B (Akt/PKB) phosphorylation in rats with myocardial infarction. We found that puerarin (120 mg/kg/day, i.p.) could increase serum nitrite concentration in rat with myocardial ischemia (MI). It also induced the gene expression or activation of eNOS, protein expression of eNOS, and the Akt/PKB phosphorylation. From these results, we suggested that puerarin could increase serum nitric oxide level of rat with myocardial infarction, which should be one of the mechanisms of the therapeutic effect of puerarin on CAD. The increased expression of eNOS and the Akt/PKB pathway may be the underlying mechanism by which puerarin stimulates NO production. 相似文献
13.
San-Yin Zhang Gang Chen Pei-Feng Wei Xiu-Shen Huang Yong Dai Ying-Jun Shen Shi-Lin Chen Chan Albert Sun-Chi Hong-Xi Xu 《Journal of Asian natural products research》2008,10(4):323-328
Puerarin (1) is a major effective ingredient extracted from the traditional Chinese medicine Ge-gen (Radix Puerariae, RP). Recently, puerarin has been used to treat patients with coronary artery diseases (CAD). However, the mechanisms of puerarin on CAD are still not very clear. In this study, we investigated the role of puerarin on serum nitric oxide (NO) concentration, myocardial endothelial nitric oxide synthase (eNOS) gene expression, the protein expression of eNOS and inducible nitric oxide synthase (iNOS), as well as the level of protein kinase B (Akt/PKB) phosphorylation in rats with myocardial infarction. We found that puerarin (120 mg/kg/day, i.p.) could increase serum nitrite concentration in rat with myocardial ischemia (MI). It also induced the gene expression or activation of eNOS, protein expression of eNOS, and the Akt/PKB phosphorylation. From these results, we suggested that puerarin could increase serum nitric oxide level of rat with myocardial infarction, which should be one of the mechanisms of the therapeutic effect of puerarin on CAD. The increased expression of eNOS and the Akt/PKB pathway may be the underlying mechanism by which puerarin stimulates NO production. 相似文献
14.
Zhi-Qiang Feng Ying-Yu Wang Feng-Ming Chu Piao-Yang Sun 《Journal of Asian natural products research》2013,15(10):843-850
Puerarin is a naturally occurring isoflavone and is frequently used for the treatment of cardiovascular symptoms in China. By the structural modification of the puerarin molecule at different positions, seven new puerarin derivatives were obtained, and their cardioprotective activities (in vitro and in vivo) were respectively evaluated. The finding that the activities of 3 and 8 markedly exceeded puerarin suggested that the acylated modification of phenolic hydroxyl at C-7 in the puerarin molecule may improve the cardioprotective activity, which will be an important reference for further structural optimization. 相似文献
15.
目的 以基质金屑蛋白酶AP—N为靶点,寻找新的抗癌活性化合物。方法 以3—氨基—2—羟基--4—苯基丁酸—亮氨酸(AHPA-Leu)为先导化合物,借助计算机分子结构优化处理进行合理药物设计,合成了8个结构全新的AHPA衍生物,并对目标化合物进行了体内、体外初步药效学评价。结果与结论 初步药效学评价表明,所合成的化合物能增强小鼠的免疫功能,抑制S180肿瘤生长,其中化合物Ⅵ活性最强。 相似文献
16.
目的探讨葛根素对自发性高血压大鼠(SHR)胸主动脉结构和功能的影响及其降压机制。方法12周龄SHR适应性喂养及血压测量训练1周后,ip给予葛根素25,50和100 mg.kg-1,给药6周。以第1次给药为第1周初,分别于给药前及给药后第2,4和6周测量血压。用硝酸还原酶法检测血清一氧化氮(NO)含量,放免法测量血浆内皮素1(ET-1)含量;HE染色观察胸主动脉形态学改变。制备胸主动脉环,采用累积加药法检测各组动脉环对苯肾上腺素(PE)10-9~10-5mol.L-1及乙酰胆碱(ACh)10-7~10-3mol.L-1引起的收缩或舒张反应。结果与对照组WKY大鼠相比,SHR模型组血压升高,ET-1增多,NO减少(P<0.01);血管肌层有大量脂质及纤维组织沉积,内皮边缘粗糙不平滑。与SHR模型组相比,葛根素25,50和100 mg.kg-1组血压分别降低了6.7±1.0,5.1±0.6和(2.2±0.3)kPa,差异显著(P<0.05);葛根素100 mg.kg-1组NO含量升高了1倍(P<0.01),ET-1含量降低了(36.3±4.2)%(P<0.05);血管肌层增生及脂质、纤维组织浸润明显好转,内皮也较平滑;降低PE对胸主动脉的收缩程度(P<0.05),增大ACh对胸主动脉的舒张程度(P<0.05)。结论葛根素对SHR具有良好的降压作用。其降压机制可能与其减弱SHR血管肾上腺素受体敏感性、保护血管内皮、增加血管内皮依赖性舒血管作用及纠正血液中血管舒缩因子失衡有关。 相似文献