共查询到19条相似文献，搜索用时 468 毫秒
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了解牛磺胆酸对发热大鼠体温的影响,并研究其解热作用机理.分别以细菌内毒素、异体蛋白和2,4-二硝基酚致热大鼠,采用荧光分光光度法测定大鼠下丘脑组织中去甲肾上腺素（NE）、多巴胺（DA）和5-羟色胺（5-HT）含量;ELISA法测定下丘脑组织中肾上腺素E2（PGE2）含量.牛磺胆酸对细菌内毒素和2,4-二硝基酚所致发热大鼠的体温具有显著的降低作用,而对蛋白胨所致的发热体温作用时间较短;给药组下丘脑中的NE、DA、5-HT和PGE2的含量显著低于对照组.试验证明牛磺胆酸具有显著的解热作用,其作用机理与影响下丘脑组织中NE、DA、5-HT和PGE2的含量有关. 相似文献
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采用比较药理学研究方法，观察了中胆红素培植牛黄，低胆红素培植牛黄和天然牛黄对大肠杆菌内毒素及蛋白胨所致大鼠发热体温和正常体温的影响。结果表明，以上３种牛黄均能寺降低大肠杆菌内毒素和蛋白胨所致大鼠的发热体温，其中，低胆红素培植牛黄的解热作用强于天然牛黄和中胆红素培植牛黄。 相似文献
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采用比较药理学研究方法对牛黄上清丸和以等量鸡胆粉代替牛黄上清丸中的主药牛黄后,制得的鸡胆粉上清丸（简称ＪＳＱＷ）的解热,镇痛作用进行了研究。结果显示,牛黄上清丸和鸡胆粉上清丸对由大肠杆菌内毒素和蛋白胨引起的大鼠发热体温有极显著的抑制作用;对由热刺激、电刺激和醋酸所致小鼠疼痛也均有明显的抑制作用;且二者之间的解热,镇痛作用均无显著性差异。 相似文献
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新兽药氟尼辛葡甲胺的解热镇痛作用 总被引：1，自引：0，他引：1
通过小鼠醋酸扭体法、家兔蛋白胨致热法对氟尼辛葡甲胺的解热、镇痛作用进行了研究。结果表明,氟尼辛葡甲胺具有明显的解热、镇痛作用。和对照组相比,氟尼辛葡甲胺4个剂量组（1.25、2.5、5、10 mg/kg）对醋酸所致的小鼠扭体反应均有极强的抑制作用,抑制率最高达100%。2.5 mg/kg的氟尼辛葡甲胺镇痛率即达82.7%,明显强于双氯芬酸钠（65.4%）和安乃近（58.7%）。对蛋白胨所致家兔发热的解热效果,氟尼辛葡甲胺高剂量组（4 mg/kg）优于安乃近组（0.2 g/kg）（P〈0.05）和氨基比林组（0.2 g/kg）（P〈0.01）。中剂量氟尼辛葡甲胺组（2 mg/kg）作用稍逊于安乃近组,但差异不显著。低剂量氟尼辛葡甲胺组（1 mg/kg）作用与氨基比林组相当。 相似文献
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鸡胆汁有效成分Tau和CA的抗炎抗菌作用研究 总被引：5，自引：1，他引：4
采用比较药理学研究方法对鸡胆汁的有效成分牛磺酸（Tau）和胆酸（CA）进行了抗炎作用及抗菌作用研究。结果显示，Tau和CA均能极显著地抑制二甲苯所致小鼠耳壳炎症及小鼠皮肤毛细血管通透性；对棉球所致小鼠肉芽肿、角叉莱胶所致大鼠足跖肿胀、甲醛所致大鼠足跖肿胀以及炎性组织中PGE2的含量增有极显著地抑制作用。因而表明Tau和CA对急慢性炎症均有很强的抑制作用。Tau和CA对体外培养的革兰氏阴性菌、大肠杆菌均无抗菌作用；对体外培养的革兰氏阳性菌、金黄色葡萄球菌Tau无抗菌作用，而CA却有明显的抗菌作用。 相似文献
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雏鸡肠炎沙门菌病是肠炎沙门菌及其内毒素共同作用的结果。为了研究白鸡屎藤挥发油抗肠炎沙门菌及其内毒素的作用,本试验测定了白鸡屎藤挥发油抗肠炎沙门菌的效果,进一步提取了肠炎沙门菌内毒素并测试了白鸡屎藤挥发油对肠炎沙门菌内毒素的体外灭活作用和对肠炎沙门菌内毒素致热的解热作用,同时本试验还对白鸡屎藤挥发油进行了定性定量分析并测试了白鸡屎藤挥发油及其主要药理活性成分的药动学特征。结果显示,白鸡屎藤挥发油包括丁香酚、樟脑、龙脑、水杨酸甲酯等活性成分,在中剂量（100mL／L）、高剂量（150mL／L）均表现出较强的体外抑菌效果,25mL／L以上浓度即可表现出较强的灭活内毒素作用,并且2～4h大部活性成分进入血液循环,表现出显著的解热作用。结果表明,白鸡屎藤挥发油具有一定的抗菌、抗内毒素和解热作用,可以用于雏鸡肠炎沙门菌感染性发热病的治疗。 相似文献
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试验旨在研究乳腺康注射液体内外药效。体外药效采用牛津杯法对其进行体外抑菌活性研究;体内药效采用热板法及醋酸致小鼠扭体的镇痛模型、二甲苯及鸡蛋清致炎模型、2,4-二硝基酚及干酵母致大鼠发热6种经典药理模型,对乳腺康注射液进行镇痛、抗炎、解热的药效研究。结果显示,乳腺康注射液对大肠杆菌及金黄色葡萄球菌有较显著的体外抑制作用,中、高剂量能极显著提高小鼠痛阈值,极显著减少醋酸所致扭体次数（P<0.01）,中剂量组能显著降低二甲苯致小鼠耳肿胀度及鸡蛋清致小鼠足跖肿胀度（P<0.05）,中、高剂量组对2,4-二硝基酚引起的发热在1.5~2.0及3.0~3.5 h有显著的解热作用（P<0.05）,对干酵母所引起的大鼠发热在1.0~3.5 h有显著的解热作用（P<0.05）。结果表明,乳腺康注射液能明显抑制大肠杆菌及金黄色葡萄球菌的活性,且具有显著的镇痛抗炎解热作用。 相似文献
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牛磺酸对STZ诱导大鼠胰岛细胞外液中SOD、GSH-PX、MDA及T-AOC含量的影响 总被引：1，自引：0，他引：1
试验旨在研究牛磺酸(Tau)对链脲佐菌素(STZ)处理后的胰岛细胞保护作用,探讨牛磺酸防治糖尿病的作用机制,为应用牛磺酸防治糖尿病提供理论依据。将体重为250~300 g大鼠麻醉后,胆总管原位灌注胶原酶V,38 ℃水浴消化胰腺组织。Histopaque 1077密度梯度离心纯化胰岛细胞,DTZ检测纯度,葡萄糖刺激检测胰岛细胞活性;再将分离纯化后的胰岛细胞分成6组:正常对照组(对照组)、牛磺酸对照组、链脲佐菌素组(STZ组) 、牛磺酸高剂量组(20 mmol/L Tau组)、牛磺酸中剂量组(10 mmol/L Tau组)、牛磺酸低剂量组(5 mmol/L Tau组);培养24 h后,测定细胞外液中超氧化物岐化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、丙二醛(MDA)、总抗氧化能力(T-AOC)的含量。结果表明,3个水平的Tau组和Tau对照组胰岛细胞外液中的SOD、GSH-Px、T-AOC的含量较STZ组有明显的提高。同时3个水平的Tau组和Tau对照组胰岛细胞外液中的MDA较STZ组有明显的降低。因此,牛磺酸能够提高STZ诱导的胰岛细胞抗氧化能力,从而对胰岛细胞具有一定的保护和修复作用。 相似文献
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牛磺酸对小鼠的镇痛作用研究 总被引：1，自引：0，他引：1
采用酒石酸锑钾诱导小鼠扭体反应,观察牛磺酸的镇痛效果;牛磺酸和纳络酮合用,探讨牛磺酸镇痛作用与阿片肽受体的关系;测定血清和腹腔液中PGE2、脑组织中NO含量,探讨牛磺酸镇痛作用的可能机制。结果表明,应用牛磺酸后,小鼠扭体次数明显减少,牛磺酸和纳络酮合用较单独使用牛磺酸小鼠扭体次数显著增加,牛磺酸可显著降低小鼠腹腔液和血清中PGE2、脑组织中NO的含量。表明牛磺酸具有良好的镇痛效果,其镇痛作用机制可能是通过减少体内前列腺素和NO的生成;另外,牛磺酸的镇痛作用可能与中枢阿片受体有一定关系。 相似文献
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ACTH (microgram kg-1 i.v.) and prednisolone (1 microgram-1 i.v.) caused a moderate but statistically significant inhibition of rumen contractions, whereas no effects on heart rate and body temperature were observed. Both hormones induced hyperglycaemia and leucocytosis, characterised by moderate lymphopenia and a profound increase in the number of circulating neutrophils. A significant decrease in plasma iron and increase in plasma zinc concentrations were observed. After 3 daily i.m. injections of ACTH (10 micrograms-1 day-1) decreases were seen in both serum Alkaline phosphatase (ALP) activity and plasma trace metal concentrations; heart rate was significantly higher. Intraveneous injection of E. coli endotoxin (0.1 microgram kg-1) caused shivering, fever, inhibition of rumen contractions, changes in heart rate, lymphopenia, neutropenia followed by neutrophilic leucocytosis, hypoferraemia, hypozincaemia, hypoglycaemia and a decline in serum ALP activity. ACTH, given i.m. for 3 days, reduced the febrile responses to E. coli endotoxin, modified the changes in heart rate, intensified the inhibition of rumen contractions, and induced a more marked decrease in the number of circulating neutrophils. ACTH pretreatment did not affect the endotoxin-induced decrease in blood glucose concentrations nor the drop in plasma zinc and iron values. These results suggest that glucocorticosteroids are not primarily involved in the fall in plasma iron and zinc concentrations during E. coli endotoxin-induced fever, the effects of endotoxin released glucocorticosteroids on white blood cells and blood glucose are masked by some other effect(s) of endotoxin, and in dwarf goats, ACTH has antipyretic properties without influencing normal body temperature. This effect is probably not dependent on adrenal cortical activity. 相似文献
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A. S. J. P. A. M. van Miere C. T. M. van Duin T. Wensing 《The Veterinary quarterly》2013,33(3):195-203
Summary ACTH (μg kg ‐1 i.v.) and prednisolone (1 μg‐1 i.v.) caused a moderate but statistically significant inhibition of rumen contractions, whereas no effects on heart rate and body temperature were observed. Both hormones induced hyperglycaemia and leucocytosis, characterised by moderate lymphopenia and a profound increase in the number of circulating neutrophils. A significant decrease in plasma iron and increase in plasma zinc concentrations were observed. After 3 daily i.m. injections of ACTH (10 μg ‐1 day ‐1) decreases were seen in both serum Alkaline phosphatase (ALP) activity and plasma trace metal concentrations; heart rate was significantly higher. Intraveneous injection of E. coli endotoxin (0.1 μg kg ‐1) caused shivering, fever, inhibition of rumen contractions, changes in heart rate, lymphopenia, neutropenia followed by neutrophilic leucocytosis, hypoferraemia, hypozincaemia, hypoglycaemia and a decline in serum ALP activity. ACTH, given for 3 days, reduced the febrile responses to E. coli endotoxin, modified the changes in heart rate, intensified the inhibition of rumen contractions, and induced a more marked decrease in the number of circulating neutrophils. ACTH pretreatment did not affect the endotoxin‐induced decrease in blood glucose concentrations nor the drop in plasma zinc and iron values. These results suggest that (1) glucocorticosteroids are not primarily involved in the fall in plasma iron and zinc concentrations during E. coli endotoxin‐induced fever, (2) the effects of endotoxin released glucocorticosteroids on white blood cells and blood glucose are masked by some other effect(s) of endotoxin, and (3) in dwarf goats, ACTH has antipyretic properties without influencing normal body temperature. This effect is probably not dependent on adrenal cortical activity. 相似文献
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A S van Miert C T van Duin J H Verheijden A J Schotman 《Research in veterinary science》1982,33(2):248-255
Flurbiprofen, a potent non-steroidal anti-inflammatory and antipyretic agent, was given as an intravenous infusion (2 mg/kg) followed by a bolus injection of 1 mg/kg six hours later. After drug administration body temperature and rumen contractions were slightly depressed, whereas urea values gradually increased; serum sorbitol dehydrogenase (SDH) activity, plasma iron concentration and the number of circulating lymphocytes were significantly lower. Intravenous injection of endotoxin from Escherichia coli O111B4 (0.1 microgram/kg) caused shivering, fever, inhibition of rumen contractions, changes in heart rate, lymphopenia, neutropenia followed by neutrophylic leucocytosis, changes in urea values, hypoferraemia, hypozincaemia and a decline in serum alkaline phosphatase (ALP) activity, whereas gamma-glutamyltranspeptidase, glutamic oxalacetic transaminase, lactic dehydrogenase and SDH values were not significantly altered. Pretreatment with flurbiprofen completely abolished the febrile reactions to endotoxin. The endotoxin-induced inhibition of rumen contractions was only delayed. The drug blocked the initial tachycardia to endotoxin but did not prevent the secondary biphasic increase in heart rate. Flurbiprofen failed to modify the endotoxin-induced decrease in both plasma zinc and serum ALP activity whereas the decline in plasma iron concentration was delayed. After drug pretreatment the changes in circulating white blood cells were more pronounced. These data demonstrate that most of the haematological, blood biochemical and clinical effects of endotoxin cannot be blocked by flurbiprofen, and that these effects are not due to the increase in body temperature alone. Tolerance induced by repetitive daily intravenous administration of endotoxin resulted in an almost complete abolition of all the effects. However, the plasma iron values from tolerant goats were significantly lower than those from non-tolerant animals, which demonstrates that the development of a refractory state can result in modification of this biochemical parameter. 相似文献
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T G Nagaraja L R Fina B A Lassman E E Bartley H D Anthony D A Sapienza B E Brent 《American journal of veterinary research》1979,40(1):35-39
Phenol-water extraction of Megasphaera elsdenii, a predominant gram-negative coccus in rumens of cattle fed high-grain diets, yielded material that exhibited typical characteristics of endotoxin. The extract was lethal to mice and to chicken embryos, caused biphasic fever in rabbits, leukopenia in mice, and local and generalized Shwartzman reactions; and induced tolerance to the lethal effect of the endotoxin in mice. The material contained carbohydrate, protein, lipid, phosphorus, and 2-keto-3-deoxyoctonate, but no nucleic acid. The beta-hydroxymyristic acid was absent. Results imply that M elsdenii endotoxin has many biological and chemical characteristics common to enterobacterial endotoxin. However, the median lethal doses in mice and in chicken embryos, and minimal dose required to elicit a local Shwartzman reaction, indicate that M elsdenii endotoxin's potency is low, which may explain why the large gram-negative bacterial population in the rumen of cattle is generally innocuous. 相似文献
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K Eder 《Archives of Animal Nutrition》1999,52(3):285-297
A previous study demonstrated that a dietary treatment of young geese with cholesterol and cholic acid raises lipid concentrations in the liver. The present study was carried out to investigate whether such a lipid accumulation caused by those hyperlipidemic compounds can be intensified by low dietary choline concentrations. Therefore, 38 eight-week old geese were divided into four groups of 9 or 10 animals each and received a basal diet poor in choline which consisted predominately of maize and soy protein isolate over a period of 8 weeks. Treatment factors were supplementation of diets with cholesterol and cholic acid (0 vs. 5 g of cholesterol and cholic acid each per kg) and supplementation of choline chloride (0 vs. 1.5 g/kg). Final body weights as well as carcass weights were neither influenced significantly by dietary treatment with cholesterol and cholic acid nor by low dietary choline concentrations. However, feeding diets supplemented with cholesterol and cholic acid markedly increased liver weights (two-fold), hepatic triglyceride (3.7-fold) and cholesterol (12-fold) concentrations and percentages of monounsaturated fatty acids at the expense of saturated and polyunsaturated fatty acids in the liver. In geese fed diets with cholesterol and cholic acid, insufficient choline supply did not intensify, but even slightly reduced hepatic lipid accumulation. Geese fed diets with cholesterol and cholic acid exhibited markedly increased levels of cholesterol, triglycerides and phospholipids in plasma and very low-density lipoproteins, regardless of the choline supply. Muscle tissue of geese fed diets supplemented with cholesterol and cholic acid exhibited also increased concentrations of triglycerides and cholesterol whereas the fatty acid composition of muscle lipids remained unchanged. Among geese without hyperlipidemic treatment, concentrations of triglycerides in plasma and very low-density lipoproteins as well as the concentrations of phosphatidylcholine in liver and muscle tissue were not reduced by low dietary choline concentrations. Therefore, it is suggested that those animals were able to synthesize endogenous sufficient choline. 相似文献
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探讨卡洛芬注射液的抗炎、镇痛作用与皮肤刺激性。以市售托芬那酸注射液为对照药物,抗炎作用采用小鼠耳肿胀法、大鼠踝关节肿胀法,镇痛作用采用小鼠热板法、小鼠醋酸扭体法,刺激性采用兔的皮肤刺激试验考察卡洛芬注射液I、II的抗炎、镇痛作用与刺激性。结果显示,各给药组对二甲苯所致的小鼠耳炎具有明显的抑制作用,且与生理盐水组差异显著(P<0.05);可抑制甲醛所致的大鼠踝关节肿胀,托芬那酸组的肿胀抑制率最高,其次为卡洛芬I组。卡洛芬I组和托芬那酸组在15、30 min时均可有效延长小鼠热板痛阈值;卡洛芬II组没有明显镇痛效果。卡洛芬I组和II组对小鼠扭体的潜伏期没有明显改变,但扭体次数相对较少,扭体抑制率分别为34.7%和17.5%。托芬那酸组第一次扭体的潜伏期较长,扭体抑制率为42.6%。兔的皮肤刺激性试验各给药组均未出现不良反应。卡洛芬I组药效快,抗炎、镇痛效果显著,安全无刺激性,效果优于卡洛芬II组。 相似文献