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苦参总碱抗心律失常作用的实验研究 总被引：6，自引：0，他引：6
苦参总碱（Tital Alkaloid of Sophora Flavescens,TASF）20mg/kg,40mg/kg能明显对抗鸟头碱20ug/kg,BaCl2 2mg/kg和结扎左冠状动脉前降支诱发大鼠的室性心律失常.TASF也能明显对抗CaCl2-Ach（CaCl20.6％+Ach 0.0025％）混合液10ml/kg诱发小鼠心房纤颤或扑动.大鼠心电图（ECG）试验证明TASF有负性频率作用,负性传导作用.这些作用可能是TASF抗心律失常作用的药理学基础. 相似文献
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静注γ—氨基丁酸100mg/kg,可对抗乌头碱致麻醉大鼠心律失常;明显降低CaCl_2引起麻醉大室颤发生率及死亡率;可明显延长肾上腺素致麻醉大鼠出现室早时间及缩短心律失常持续时间。 相似文献
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绞股蓝总皂甙给小鼠灌胃的最大耐受量为9g/kg.绞股蓝皂甙700,350,180mg/kg经大鼠灌胃,可抑制大鼠实验性血栓形成,抑制率分别为60.7％,73.3％,26.5％;使大鼠血清总胆固醇(CH),甘油三脂(TG),β—脂蛋白(β—LP)均有不同程度的降低.1000 mg/kg,500mg/kg绞股蓝皂甙可抑制氯仿及乌头碱诱发的心律失常.绞股蓝皂甙还有一定程度的急性降压作用. 相似文献
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心喘灵(xc-1)能明显对抗乌头硷,BaCl_2和结扎左冠状动脉前降支诱发大鼠的室性心率失常,并能降低大鼠再灌注诱发的心律失常。xc-1能降低离体大鼠右心房的自发频率。对大鼠心电图实验,证明 xc-1有负性频率怍用,负性传导作用,负性自律性、负性频率、负性传导作用可能是 xc-1抗心率失常作用的药理基础。 相似文献
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目的:研究蛇床子素(Osthol,Ost)的抗实验性心律失常作用。方法:采用氯仿、氯化钙诱发动物室颤,肾上腺素诱发动物心律失常试验,给予不同剂量Ost观察其抗实验性心律失常的效果。结果:Ost 20,10mg.kg~(-1)ip对氯仿诱发的小鼠室颤具有保护作用,Ost 10,5mg.kg~(-1)iv对5％氯化钙140mg.kg~(-1)iv诱发的大鼠室颤均有明显的预防作用,Ost 50mg.kg~(-1)iv能明显延长肾上腺素(AD)75μg.kg~(-1)iv诱发家兔心律失常的发生时间,并缩短心律失常的持续时间。结论:蛇床子素有抗心律失常作用。 相似文献
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目的:研究滁菊总黄酮(TFCJ)抗大鼠局灶性脑缺血再灌注损伤(FCIRI)作用.方法:取120只雄性SD大鼠,随机分为6组,即假手术组、模型组、T FCJ高中低组和血塞通组,其中假手术组每日灌胃10 mL/kg0.5％ 羧甲基纤维素(CMC)溶液,手术仅分离血管;模型组每日灌胃10 mL/kg 0.5％CMC溶液,复制FCIRI模型;T FCJ高中低剂量组和血塞通组每日灌胃40 mg/kg、20 mg/kg、10 mg/kg T FCJ和25 mg/kg血塞通,用0.5％CM C溶液配制,复制FCIRI模型.以上全部大鼠每日灌胃1次,周期为7 d.使用神经评分系统、TTC染色和脑指数评估大鼠神经系统缺陷程度,SOD、GSH-Px、CAT和MDA评估氧化应激程度,H E染色用于评估脑组织病理变化.结果:取120只雄性S D大鼠,随机分为6组,假手术组每日灌胃10 mL/kg 0.5％ 羧甲基纤维素(CMC)溶液,手术仅分离血管;模型组每日灌胃10 mL/kg 0.5％CM C溶液,复制FCIRI模型;T FCJ高中低剂量组和血塞通组每日灌胃40 mg/kg、20 mg/kg、10 mg/kg TFCJ和25 mg/kg血塞通,用0.5％CMC溶液配制,复制FCIRI模型.以上全部大鼠每日灌胃1次,周期为7 d.使用神经评分系统、TTC染色和脑指数评估大鼠神经系统缺陷程度,SOD、GSH-Px、CAT和MDA评估氧化应激程度,HE染色用于评估脑组织病理变化.结论:TFCJ对大鼠RCIRI具有保护作用. 相似文献
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多氯二肽DN_5,DN_(1653)等化合物在65μg/kg和30μg/kg时均具明显的降压作用,作用时间可持续5h以上,DN_(1653)有先升压后降压的特点,在大鼠侧脑室注射1μg/kg DN_(1563)和DN_5有明显的降压效果,说明此化合物的降压作用与中枢有关.30mg/L DN_5和DN_(1653)对诱导SD大鼠,家兔血小板聚集作用较弱,但能诱导猴血小板聚集达50％以上,α肾上腺素受体阻断剂酚妥拉明可完全对抗两者的促血小板聚集作用.结果揭示DN_5和DN_(1653)有显著生理活性,其作用可能与α受体有关. 相似文献
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L—谷氨酸(L—Clu)、红藻氨酸(KA)icv可诱发小鼠发作性和奔跑型惊厥,CD_(50)±95％FL分别为43±18μg/mouse,及0.043±0.010μg/mouse。在苯巴比妥钠、苯妥英钠、丙戊酸钠、硫酸镁、普萘洛尔及安定6种抗惊厥药物中,安定可特异性地对抗KA惊厥。氨氧乙酸(AOAA)25mg/kg ip或GABA 67μg/mouse icv不能降低KA CD_(98)剂量诱发的惊厥发作率;氨基脲(SCZ)110 mg/kg ip或印防已毒(PIC)2mg/kg iv对KA CD_(10)剂量诱发惊厥亦无影响。但AOAA和SCZ可分别增强或减弱安定的抗惊厥作用。 相似文献
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静注硫酸镁125mg/kg,可拮抗氯化钡及肾上腺素所致麻醉家兔室性心律失常,但对乌头碱引起的大鼠心律失常无拮抗作用。 相似文献
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CaCl2对百合切花保鲜效应的研究 总被引：4，自引：0，他引：4
该研究以1％的CaCl2＋10％的蔗糖混合而成的溶液作为保鲜液，对百合切花进行瓶插实验，通过外部形态观察和生理指标测定，结果表明：CaCl2＋蔗糖的保鲜液瓶插百合切花，可以保持切花的水分平衡，减少溶质外渗，维持膜结构的相对稳定性，提高切花瓶插期的观赏品质，从而使切花的瓶插寿命比对照延长2．4d． 相似文献
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柚皮苷和新橙皮苷抗过敏作用的研究 总被引：9，自引：0，他引：9
[目的]为了研究柚皮苷和橙皮苷的抗过敏作用.[方法]采用DNFB法诱导小鼠3相皮肤炎后,第2~8 d连续口服给以柚皮苷和橙皮苷.观察即时相(IPR)、迟发相(LPR)和超迟发相(vLPR)的抑制率.[结果]柚皮苷在投药量为20 mg/kg时,对IPR、vLPR的耳缘浮肿产生有效的抑制,抑制率分别为2 8.2%,2 6.1%;投药量为100 mg/kg,对浮肿各相都产生有效的抑制,抑制率分别为31.7%,25.1%,29.9%.新橙皮苷在20和100 mg/kg投药量下,对vLPR相产生有效的抑制,抑制率分别为19.1%,23.6%.[结论]柚皮苷和橙皮苷表现出较好的抑制3相皮肤炎作用,在抗过敏方面具有一定的开发价值. 相似文献
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Liu YM Zhu SM Wang KR Feng ZY Chen QL 《Journal of Zhejiang University. Science. B》2008,9(11):895-902
Objective: To evaluate the effects oftramadol on the proinflammatory responses in a rat model of incisional pain by investigating its effects on nociceptive thresholds and serum interleukin-6 (IL-6) and IL-2 levels. Methods: Forty-two male Sprague-Dawley (SD) rats scheduled for plantar incision were randomly divided into 7 groups (n=6 in each group). Rats in Group 1 receiving general anesthesia with no incision were served as control; At 30 min before skin incision, Groups 2～5 were given 5 ml normal saline or 1, 10, and 20 mg/kg tramadol, respectively, intraperitoneally (i.p.); Group 6 received 10 mg/kg tramadol after operation; Group 7 received 10 mg/kg tramadol before incision, followed by 200 μg/kg naloxone after operation. Mechanical allodynia was measured by electronic von Frey filament to evaluate the nociceptive thresholds 1 h before incision, and 1 h and 2 h after operation. Serum IL-6 and IL-2 levels were measured by enzyme-linked immunosorbent assay (ELISA) 2 h after operation. Results: Mechanical thresholds decreased significantly and serum IL-6 level increased significantly after operation in Group 2 compared with control (P＜0.01), and these changes were reversed respectively by tramadol in a dose-dependent manner (P＜0.05 and P＜0.01, respectively). IL-2 level remained unchanged after operation in Group 2, but decreased in Group 3 (P＜0.05), then gradually returned to the normal level in Groups 4 and 5. The intraperitoneally injected tramadol (10 and 20 mg/kg) produced a potent and dose-dependent antinocicptive effect on the lesioned paw. The antinocicptive effects of tramadol were partially an-tagonized by naloxone (200 μg/kg), suggesting an additional non-opioid mechanism. Conclusion: The results suggest that tramadol could be a good choice for the treatment of pain under the conditions that immunosuppression may be particularly contraindicated. 相似文献
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Zariyantey Abdul Hamid Siti Balkis Budin Ng Wen Jie Asmah Hamid Khairana Husain Jamaludin Mohamed 《Journal of Zhejiang University. Science. B》2012,13(3):176-185
Paracetamol (PCM) overdose can cause nephrotoxicity with oxidative stress as one of the possible mechanisms mediating the
event. In this study, the effects of ethyl acetate extract of Zingiber zerumbet rhizome [200 mg per kg of body weight (mg/kg) and 400 mg/kg] on PCM-induced nephrotoxicity were examined. Rats were divided
into five groups containing 10 rats each. The control group received distilled water while other groups were treated with
extract alone (400 mg/kg), PCM alone (750 mg/kg), 750 mg/kg PCM+200 mg/kg extract (PCM+ 200-extract), and 750 mg/kg PCM+400
mg/kg extract (PCM+400-extract), respectively, for seven consecutive days. The Z. zerumbet extract was given intraperitoneally concurrent with oral administration of PCM. Treatment with Z. zerumbet extract at doses of 200 and 400 mg/kg prevented the PCM-induced nephrotoxicity and oxidative impairments of the kidney, as
evidenced by a significantly reduced (P<0.05) level of plasma creatinine, plasma and renal malondialdehyde (MDA), plasma protein carbonyl, and renal advanced oxidation
protein product (AOPP). Furthermore, both doses were also able to induce a significant increment (P<0.05) of plasma and renal levels of glutathione (GSH) and plasma superoxide dismutase (SOD) activity. The nephroprotective
effects of Z. zerumbet extract were confirmed by a reduced intensity of renal cellular damage, as evidenced by histological findings. Moreover,
Z. zerumbet extract administered at 400 mg/kg was found to show greater protective effects than that at 200 mg/kg. In conclusion, ethyl
acetate extract of Z. zerumbet rhizome has a protective role against PCM-induced nephrotoxicity and the process is probably mediated through its antioxidant
properties. 相似文献
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襄阳区水稻测土配方施肥“3414”试验初报 总被引：1，自引：0，他引：1
通过“3414”试验,确定了襄阳区水稻主推品种华两优1206,在有机质含量为2．11％,碱解氮为79．97mg／kg,有效磷为13．34mg／kg,速效钾为74．20mg／kg,pH为7．1的淹育型水稻土田块上种植,氮、磷、钾肥的施肥量分别为N13．3kg／666．7m2、P2O5 4．0kg／666．7m2,K205．9kg／666．7m2时,水稻可获得最高产量,分别为450．9kg／666．7m2,445．6kg／666．7m2、443．9kg/666．7m2;氮、磷、钾肥的施肥量分别为N9．6kg／666．7m2,P2052．7kg/666．7m2、K204．1kg/666．7m2时,水稻可获得经济最佳产量,分别为446．7kg/666．7m2．443．7kg／666．7m2,441．6kg/666．7m2。 相似文献
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二氢茉莉酸丙酯（PDJ）对水稻移栽苗生长的影响 总被引：1，自引：1，他引：0
研究了不同浓度的PDJ溶液对水稻移栽苗生长的影响．结果表明,适当浓度的PDJ能提高水稻幼苗的抗干燥性和抗寒性,特别能提高抗干燥性;促进根系生长,促进分蘖;促进干物质的累积,从而提高了谷粒产量其中10mg／kgPDJ喷雾处理,提高了单株产量16．7％,差异显著;0．05mg/kgPDJ浸根处理,提高了单株产量20．8％,差异极显著。 相似文献
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