薤白提取物对心肌缺氧缺血及缺血再灌注心肌损伤的保护作用

采用异丙肾上腺素致小鼠常压缺氧模型、垂体后叶素致大鼠急性心肌缺血模型及大鼠心肌缺血再灌注模型 ,考察薤白提取物抗心肌缺氧缺血及缺血后再灌注损伤的保护作用。结果表明薤白提取物能延长异丙肾上腺素作用的小鼠常压缺氧存活时间 ,对抗垂体后叶素所致的大鼠急性心肌缺血作用 ,并能明显保护缺血再灌注引起的大鼠心肌的损伤     

苦苣提取物的心血管保护作用研究

目的：观察苦苣提取物的心血管保护作用。方法：采用常压耐缺氧、饥饿小鼠生存时间、急性心肌缺血模型、电刺激诱发血栓形成模型等实验方法，观察苦苣提取物的心血管药理活性。结果：苦苣提取物灌胃给药12．5g/kg和6．3g／kg均能明显增加小鼠常压下耐缺氧存活时间，能够延长饥饿小鼠的生存时间。3、2g/kg可明显降低大鼠血液黏度，延长大鼠体内血栓形成时间。苦苣提取物3．2g/kg和1．6g／kg对由垂体后叶素所致冠状动脉痉挛引起的大鼠急性心肌缺血具有明显的拮抗作用。结论：苦苣提取物具有活血化淤、抗心肌缺血的心血管保护作用。     

麦利平的抗缺氧作用

目的为探讨麦利平对心肌缺血缺氧的作用 ,用小白鼠制备模型进行耐缺氧研究。方法采用小鼠常压缺氧模型、垂体后叶素 (PIT)致小鼠急性心肌缺血模型、氰化钾 (KCN)致小鼠组织缺氧模型、亚硝酸钠 (NaNO2 )致小鼠组织缺氧模型 ,考察了麦利平对心肌缺氧缺血的保护作用。结果麦利平能延长小鼠常压缺氧条件下的存活时间 ;能降低垂体后叶素致小鼠急性心肌缺血的死亡率 ;对腹腔注射氰化钾、亚硝酸钠引起小鼠组织中毒性缺氧均有明显的缓解作用。结论麦利平对心肌缺血缺氧具有保护作用。     

瓜蒌提取物对缺血缺氧及缺血后再灌注损伤心肌的保护作用

以异丙肾上腺素致小鼠常压缺氧模型、垂体后叶素致大鼠急性心肌缺血模型及大鼠心肌缺血再灌注模型 ,对瓜蒌提取物抗心肌缺氧缺血及缺血后再灌注损伤的作用进行探讨 .实验结果表明瓜蒌提取物能延长异丙肾上腺素作用的小鼠常压缺氧存活时间 ,对抗垂体后叶素所致的大鼠急性心肌缺血作用 ,并能显著保护缺血后再灌注损伤的大鼠 .     

冠心丹参胶囊对动物活血化瘀等功效的研究

目的研究冠心丹参胶囊对动物活血化瘀的作用.方法在建立小鼠耐缺氧模型、小鼠耳廓微循环和大鼠急性心肌缺血模型的基础上,研究冠心丹参胶囊对动物活血化瘀的作用.结果冠心丹参胶囊(1.00,2.00 g·kg-1,ig)给药能明显延长小鼠常压耐缺氧的存活时间,有较好的对抗高分子右旋糖酐所引起的小鼠血瘀,改善微循环,对结扎冠状动脉所致心肌缺血具有保护作用.结论冠心丹参胶囊对动物具有活血化瘀的作用.     

罂粟科植物Platycapnos spicata中的（＋）-南天竹宁的药理作用

心脏肥大与2K-1C(2-kidney,1-clip)型肾血管性高血压密切相关。作者研究了长期服用玫瑰茄Hibiscus sabdariffa(HS)花瓣水提取物对2K-1C型肾血管性高血压大鼠的降压和减轻心脏肥大的作用。     

黄蜀葵花总黄酮对小鼠急性心肌缺血缺氧损伤的保护作用

目的 :研究黄蜀葵花总黄酮 (TFA)对小鼠急性心肌缺血、缺氧损伤的保护作用。方法 :采用皮下注射盐酸异丙肾上腺素(Iso)建立小鼠急性心肌缺血模型 ,观察TFA对小鼠ECGⅡ导联异常ST段、T波以及心肌含水量 (MWC)、心肌指数 (MI)的影响 ;采用气管挟闭建立小鼠心肌缺氧模型 ,观察TFA对小鼠心脏耐缺氧能力的影响。结果 :TFA可显著改善Iso诱发小鼠ECGⅡ导联异常的ST段和T波 ,抑制MWC及MI的升高 ,明显延长气管挟闭后小鼠心电持续的时间。结论 :TFA对小鼠急性心肌缺血、缺氧损伤具有保护作用。     

自制复方中药提取物对动物心肌梗死及耐缺氧的作用研究

目的 研究自制复方中药提取物对心肌梗死及耐缺氧的作用.方法 以小鼠、家兔为试验对象,给以银杏叶、人参、川芎、五味子提取物自制的复方中药,检测其对小鼠常压耐氧时间的影响,以及对家兔冠状动脉结扎致心肌梗死的影响.结果 常压耐缺氧条件下,以银杏叶、人参、川芎、五味子提取物制成的中成药能明显延长小鼠耐缺氧时间,并对家兔冠状动脉结扎所致心肌缺血有明显保护作用,使心肌梗死程度减轻,抑制急性心肌缺血所致ST段抬高.结论 该复方中药提取物能明显改善动物的心肌梗死及机体耐氧能力.     

新型抗高血压药阿利吉仑的心肾保护作用研究进展

目的:介绍阿利吉仑心肾保护作用的研究进展。方法:根据文献,综述阿利吉仑在降压治疗过程中产生的心肾保护作用。结果:阿利吉仑通过直接抑制肾素发挥治疗作用的同时,可减轻高血压患者的左心室肥厚,降低心衰患者的脑利钠肽水平,减少或减轻蛋白尿的产生。结论:阿利吉仑在发挥药效的过程中对心肾具有保护作用,有可能成为心血管系统疾病、糖尿病伴肾病的高血压患者的首选药。     

宁心安神散主要药效学研究

目的 :观察宁心安神散对实验动物耐缺氧作用、抗氧化作用和抗心肌缺血作用。方法 :采用小鼠常压耐缺氧试验和大鼠心肌缺血性试验 ,观察宁心安神散对动物心脏保护作用 ;比色法测定血清MDA ,SOD等含量 ,确定宁心安神散清除氧自由基、抗氧化作用 ;以垂体后叶素所致的心肌缺血法 ,测定宁心安神散保护心肌的作用。结果 :宁心安神散能延长小鼠缺氧死亡时间、提高血清SOD含量 ,降低血清MDA含量 ;减少垂体后叶素所致心肌缺血例数 ,改善心肌缺血程度。结论 :宁心安神散能够延长心肌缺氧死亡时间 ,改善心肌的缺血状态 ,保护心肌 ;改善心肌代谢 ,清除氧自由基 ,抗氧化等     

云南茶叶和甜茶的抗过敏活性

采用透明质酸酶体外抑制试验 ,测定了 1 1种云南大叶茶种市售茶叶的抽提物 ,结果表明 ,1 1种茶叶均具有强抗过敏活性 ,其抗过敏活性高于福建乌龙茶和广西甜茶。云南甜茶成分预试验和溶剂系统提取结果表明 ,抗过敏成分为酚类物质 ,乙酸乙酯组分具有强抗过敏作用。云南大叶茶和甜茶具有极大的开发价值。     

乌榄叶水提物对应激性高血压大鼠降压作用的研究

目的探讨乌榄叶水提物对应激性高血压大鼠血压和心率的影响.方法用电击足底与噪声结合刺激大鼠4周,建立应激性高血压模型.采取用颈总动脉插管法,通过MedLab生物信号采集处理系统,检测大鼠平均收缩压、舒张压和心率.结果乌榄叶水提物对应激性高血压大鼠有显著的降压作用,其中以舒张压下降最为明显,降压幅度较正常大鼠显著(P＜0.01),作用维持时间更长,同时具有减慢心率作用.结论乌榄叶含有丰富而强效的降压活性成分;降压效果与大鼠基础血压相关.     

小叶锦鸡儿提取物对大鼠实验性心律失常的影响

目的研究小叶锦鸡儿正丁醇提取物对药物诱发大鼠实验性心律失常的影响。方法制备乌头碱、氯化钡(BaCl2)诱发大鼠实验性心律失常模型,将大鼠分为生理盐水对照组、阳性对照组和100、50 mg.kg-1小叶锦鸡儿正丁醇提取物组,分别于舌下静脉给药1次,记录给予乌头碱后出现室性早搏(VP)、室性心动过速(VT)、心室颤动(VF)时乌头碱的用量;记录给予BaCl2后心律失常出现的时间和维持的时间。结果小叶锦鸡儿正丁醇提取物的两个剂量可明显提高乌头碱所致大鼠发生的VP、VT、VF的用量;延长BaCl2诱发大鼠心律失常的出现时间,缩短维持时间。结论小叶锦鸡儿正丁醇提取物具有一定抗大鼠实验性心律失常的作用。     

粗吻海龙对去势大鼠骨质疏松作用的研究

目的 :研究粗吻海龙水、醇提取液对成年雌性去势大鼠所致骨质疏松症的作用。方法 :将雌性成年大鼠切除卵巢 ,8周后测定有关指标 ,并与假手术组、模型组和尼尔雌醇组进行了比较。结果 :粗吻海龙水提取液灌胃组的骨灰重、骨钙含量、骨断裂力均明显高于模型组 (P <0 .0 5 )。结论 :提示粗吻海龙提取液对去势大鼠造成的骨质疏松症有一定的治疗作用。     

草苁蓉甲醇提取物(BR)对大鼠肝癌细胞功能的影响

目的:MTT比色法检测草苁蓉甲醇提取物(BR)对大鼠肝癌细胞功能的影响和倒置显微镜下观察形态学改变情况.方法:将大鼠肝癌细胞随机分为5个组:分别为1个对照组、4个实验组.4个实验组加入草苁蓉甲醇提取物,使药物终浓度分别达到0.25g/L、0.5g/L、0.75g/L、1.0g/L;对照组除加等体积的生理盐水代替用药外,...     

The abortifacient effects from the seeds of Coix lachryma-jobi L. var. ma-yuen Stapf

This study evaluated the abortifacient effects of the extracts of seeds of Coix lachryma-jobi L. var. ma-yuen Stapf (adlay) in pregnant rats. Pregnant rats were treated with oral administration of adlay seed extracts on d 6 of pregnancy and their fetuses were examined for growth and malformations on d 20 of pregnancy. Following oral administration of 1 g/kg body weight of water extracts but not methanolic extracts, fetal resorptions were significantly increased and mortality of postimplantation was increased. There were no significant differences in the uterine and fetal weight compared to control. Fetal malformations were not observed in the adlay seed extracts-treated pregnant rats. The contractile activity of uteri isolated from rats on d 20 of pregnancy was assessed. The spontaneous uterine contractions were significantly enhanced in rats treated with water extracts of adlay seeds (1 g/kg body weight). Immunoblotting of uteri from rats treated with water extracts of adlay seeds demonstrated an induction of cyclooxygenase-2 (COX-2) protein expression. The water extracts of adlay seeds also enhanced extracellular signal-regulated protein kinase (ERK) 1/2 phosphorylation and protein kinase C (PKC)-alpha translocation from cytosolic to particulate fractions in uteri. These results indicate that the water extracts of adlay seeds are capable of inducing embryotoxicity and enhancing uterine contractility during pregnancy. The enhanced activities of PKC-alpha, ERK1/2, and COX-2 may contribute to these responses.     

Anti-babesial activity of some central kalimantan plant extracts and active oligostilbenoids from Shorea balangeran

Bark extracts from a total of 22 species of Central Kalimantan plants were evaluated for their anti-babesial activity against Babesia gibsoni in vitro. Of these plant species, extracts of Calophyllum tetrapterum, Garcinia rigida, Lithocarpus sp., Sandoricum emarginatum, and Shorea balangeran showed more than 90% inhibition of the parasite growth at a test concentration of 1000 microg/mL. Activity-guided fractionation of the bark of S. balangeran (Dipterocarpaceae) led to the reisolation of oligostilbenoids, vaticanol A(1), B(2), and G(3). The structures were determined on the basis of spectral evidence. Compounds 1 and 3 showed complete inhibition on the growth of Babesia gibsoni in vitro at a concentration of 25 microg/mL, and compound 2 at concentration of 50 microg/mL.     

河蚌制剂痛克的镇痛抗炎作用

河蚌制剂痛克以０．２，０．４ｇ／ｍｌ外用，对小鼠热板及慢性疼痛模型，大鼠光热及尿酸钠关节炎模型所致疼痛以应均显示较强的镇痛作用，对巴豆油致小鼠耳廓肿胀，琼脂叉菜胶所致小鼠足跖肿胀亦有明显的抗炎作用。     

Reduction of ethanol intake by chronic treatment with Hypericum perforatum, alone or combined with naltrexone in rats

Acute treatment with extracts of Hypericum perforatum, the common plant usually called St. John's Wort, reduces voluntary ethanol intake in Marchigian Sardinian alcohol-preferring (msP) rats and acts synergistically with opioid receptor antagonists to further attenuate ethanol consumption. The present study evaluated the effect of chronic (once a day for 12 days) intragastric administration of a CO2 Hypericum perforatum extract (HPCO2), given alone or combined with naltrexone (NTX), on ethanol intake offered 2h/day in msP rats. Chronic treatment with HPCO2 markedly reduced ethanol intake at the dose of 125, but not at 7 mg/kg; the effect of 125 mg/kg was observed since the first day of treatment and remained constant across the 12 days. The same dose of HPCO2 slightly reduced the simultaneous intake of food only on day 3 and day 11 of treatment. Treated rats promptly recovered baseline ethanol intake when treatment did not precede access to ethanol (on day 8) or after the end of treatment (day 13 and day 14), suggesting that HPCO2 administrations did not induce conditioned aversion to alcohol. Chronic intraperitoneal treatment with NTX reduced ethanol intake at 3, but not at 0.5mg/kg. The synergistic effect on ethanol intake of HPCO2 and NTX was evident also in conditions of chronic treatment. HPCO2, 7 mg/kg, and NTX, 0.5mg/kg, evoked a pronounced and statistically significant reduction of ethanol intake, while being inactive. The effect on ethanol intake of the combined treatment remained stable over the 12 days of treatment; food intake was slightly reduced only on day 3 and on day 7 in response to 125 mg/kg of HPCO2 combined with NTX 0.5mg/kg, but no difference in body weight between controls and treated rats was observed at the end of treatment. Following 12-day treatment with 125 mg/kg of HPCO2, no difference was observed in the responsivity of msP rats to the effect on ethanol intake of several doses of the extract. In conclusion, the present results provide evidence for a selective and pronounced effect of HPCO2, alone or combined with naltrexone, on ethanol intake in conditions of chronic treatment, without development of tolerance. These findings further support the view that clinical trials for extracts of Hypericum perforatum in the treatment of alcoholism should be considered.     

5-Hydroxytryptamine-inhibiting property of Feverfew: role of parthenolide content

AIM: To study the mechanism of antimigraine activity of Tanacetum parthenium ( Feverfew), its extracts and parthenolide, a component of Feverfew, by observing their effect on 5-HT storage and release, and stimulation of 5-HT2B and 5-HT2A receptors. Also to standardize a dosage form of Feverfew with respect to its parthenolide content. METHODS: Isometric responses to 5-HT and an indirect acting serotonergic, d-fenfluramine, were obtained on rat fundus and ileum. In one set of experiments the effect of dichloromethane extract of Feverfew and parthenolide was observed on the above. The extract was then thermally degraded upto 10 %, 23 %, and 33 % with respect to its parthenolide content by keeping at 60℃ and 75 % relative humidity and the experiments were repeated. In another set of experiments rats were fed with 20 mg/kg Feverfew powder (equivalent to a human dose of 500 μg parthenolide per day) for 30 d or were ip injected with parthenolide (23.4 μg/day) for 7 d. In the same set of experiments one gro