共查询到20条相似文献，搜索用时 15 毫秒
1.
目的：观察天麻素对癫痫大鼠海马Caspase-3表达的影响及其脑保护作用。方法：120只健康成年雄性Wistar大鼠随机分为对照组、PTZ（戊四氮）组、VPA（丙戊酸钠）组、Gb（天麻素大剂量）组和Gs（天麻素小剂量）组（n=24）。对照组和PTZ组分别以生理盐水（4mL/kg·d）灌胃;VPA组给予丙戊酸20mg．kg^-1,Gb组和Gs组分别给予天麻素200mg．kg^-1和100mg．kg^-1;每天1次,连续7天。造模第一天,除对照组大鼠外,余者均腹腔注射戊四氮75mg／kg,记录动物行为学变化。于致痫后12h、2d、5d和7d相应时间点取材,制备脑标本,免疫细胞化学术检测caspase-3表达。结果：致痫后12h,P11Z组Caspase-3有微量表达,其余各组几乎无表达;2—7d。PTZ组Caspase-3表达增加。与PTZ组比较,Gb组、Gs组及VPA组Caspase-3阳性表达降低,差异显著（P〈0．05）;与VPA组比较,Gb组和Gs组Caspase-3表达无显著差异（P〉0．05）。结论：天麻素能降低致痫大鼠海马神经元Caspase-3表达;可能通过抑制神经元凋亡发挥脑保护作用。 相似文献
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目的：观察戊四氮（PTZ）致痫大鼠海马神经元caspase-3表达以及中药复方AAP的脑保护作用.方法：144只健康成年雄性Wistar大鼠随机分为对照组（CK组）、模型组（PTZ组）、中药大剂量组（AAPl组）、中药中剂量组（AAPm组）、中药小剂量组（AAPs组）和丙戊酸钠组（VPA组）;每组各6只.CK组和PTZ组分别给予生理盐水（4mL/kg.d）灌胃;中药各组分别给予中药复方大、中、小剂量（10.26g/kg、5.13g/kg、2.56g/kg）灌胃,每天1次;VPA组腹腔注射VPA（20mg/kg.d）.造模第一天,除CK组外,其余各组大鼠均腹腔注射戊四氮（PTZ）75mg/kg,观察记录大鼠行为学变化;于致痫后12h、2d、5d、7d相应时间点取材,制备脑标本;免疫组化检测caspase-3表达.结果：致痫后,除CK组外,其余各组海马区caspase-3阳性表达增强;7天,与PTZ组相比,AAPl组、AAPm组和AAPs组海马CA3区caspase-3阳性表达减弱（P〈0.05）.结论：caspase-3参与致痫大鼠海马神经元凋亡过程;AAP能降低caspase-3表达,减少神经元凋亡,有神经保护作用. 相似文献
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目的：探讨咖啡因对大鼠6－羟基多巴胺（6-OHDA）诱导的帕金森模型作用的量效关系及其最佳用量。方法：应用6-OHDA制备成年大鼠右侧损毁的帕金森病模型,通过外周注射阿朴吗啡促使大鼠旋转次数作为对其病情进行定量检测的指标。用已知不同剂量的咖啡因每天对大鼠灌胃进行治疗,以大鼠旋转次数为主要指标,判断其对帕金森病治疗效果的变迁情况,以探讨咖啡因治疗帕金森病的最佳剂量。结果：咖啡因（30,40,50mg／kgBW）有明显治疗效果,但咖啡因40,50mg／kgBW组对大鼠有可能产生生存质量影响。结论：30mg／kgBW是咖啡因治疗6-OHDA制备帕金森大鼠模型的有效剂量,咖啡因对帕金森病的疗效随剂量增长,到一定剂量时则不再增长。 相似文献
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鸡血藤水提物的镇静、催眠作用研究 总被引：1，自引：0，他引：1
初步探讨了采用镇静、催眠实验观察鸡血藤水提物对小鼠自主活动的影响以及协同戊巴比妥钠对小鼠的催眠作用以鸡血藤水提物的镇静、催眠药理作用．显示鸡血藤水提物能明显减少小鼠自主活动次数,增加阈下剂量戊巴比妥钠致小鼠睡眠只数,延长阈上剂量戊巴比妥钠致小鼠睡眠时间．结果表明鸡血藤水提物具有明显的镇静、催眠作用． 相似文献
5.
小鼠灌服玫瑰红景天水煎剂10g/kg,有加强硫贲妥纳的催眠作用,拮抗咖啡因的惊厥作用,抗疲劳、耐缺氧、耐饥饿,耐寒作用.小鼠皮下注射玫瑰红景天水煎剂5.0g/kg,可明显抑制皮下注射肾上腺素1.0mg/kg 后1h 引起的血糖升高。此外,玫瑰红景天水煎剂可使离体蛙心收缩幅度增加,使离体肠管收缩运动变得有节律. 相似文献
6.
经NIH小鼠急性毒性实验测定结果表明,贡品健身酒最大耐受量为270ml/kg.贡品健身酒5,10,20ml/kg给动物灌胃,可降低小鼠脑、心、肝脂质过氧化产物丙二醛含量;10,20m1/kg剂量组,可增加小鼠血清溶血素含量,延长小鼠爬杆时间和负荷游泳时间,对戊巴比妥钠诱导的小鼠入睡时间可显著延长;对大鼠血清总胆固醇含量可显著降低.体外实验还证明贡品健身酒具抗肿瘤作用,实验结果提示。贡品健身酒具明显的保健功效. 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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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
11.
白饭树(Flugea virose(Roxb ex willd) Baill [F, mierocarna Bl.])水提物对CCl_4造成的小鼠、大鼠急性肝损伤具有明显的保护作用,可使中毒鼠血清中GPT,GOT,ALP,LDH等酶的含量显著下降或趋于正常;对CCl_4所致肝脏脂质过氧化作用具明显的缓解作用,并提高CCl_4损伤肝的解毒能力. 相似文献
12.
Supatcharee Arun Jaturon Burawat Supataechasit Yannasithinon Wannisa Sukhorum Akgpol Limpongsa Sitthichai Iamsaard 《Journal of Zhejiang University. Science. B》2018,19(12):948-959
Stress affects the male reproductive system and can cause sub-fertility or infertility. Although Phyllanthus emblica L. (PE) extract has been shown to have high antioxidant capacity and protective properties in damaged tissue, the preventive effects of PE extract on testicular function from stress-related impairment have never been demonstrated. This study aimed to investigate the effects of PE aqueous leaf extract on testicular impairment and protein marker changes in rats suffering from chronic stress. Adult male rats were divided into four groups: a control group, a chronic stress (CS) group, and two groups with CS that received different doses of PE extract (50 or 100 mg/kg body weight (BW)). In the treatment groups, the animals were given PE extract daily before stress induction for 42 consecutive days. Stress was induced through immobilization (4 h/d) followed by forced cold swimming (15 min/d). Sperm quality and the histology of the testes and caudal epididymis were examined, as were levels of serum corticosterone, testosterone, and malondialdehyde (MDA). The expressions of testicular steroidogenic acute regulatory (StAR) and tyrosine-phosphorylated proteins were investigated using immuno-Western blot analysis, as these proteins are assumed to play important roles in spermatogenesis and androgen synthesis. The results showed that PE (50 mg/kg BW) significantly increased sperm concentration and testosterone levels, while decreasing corticosterone levels, MDA levels, sperm head abnormalities, and acrosome-reacted sperm in CS rats. In addition, PE at both doses was found to diminish testicular histopathology in the CS rats. We also found that 50 mg/kg BW of PE significantly improved StAR protein expression and altered the intensities of some tyrosine-phosphorylated proteins in testis. We conclude that PE leaf extract at 50 mg/kg BW can prevent testicular damage in rats with CS. 相似文献
13.
Objective: To observe the effects of fructose-1,6-diphosphate (FDP) on serum levels of cardiac troponin 1 (cTnl) and creatine kinase-MB (CK-MB), as well as the concentration of calcium in cardiomyocytes (Myo[Ca2 ]) and activity of sarcoplosnic Ca2 -ATPase (SRCa2 -ATPase) in Adriamycin (ADR)-treated rats. Methods: Rats were intraperitoneally injected with ADR (2.5 mg/kg every other day for 6 times) and then with different dosages of FDP (every other day for twenty-one times). Bi-antibodies sandwich Enzyme linked immune absorption assay (ELISA) was performed to detect serum level of cTnl. CK-MB was detected by monoclonal antibody, Myo[Ca2 ] was detected by fluorescent spectrophotometry and the activity of SRCa2 -ATPase was detected by inorganic phosphate method. Results: FDP (300, 600, 1200 mg/kg) significantly reduced the serum levels of cTnl and CK-MB, while at the same time decreased calcium concentration and increased SRCa2 -ATPase activity in cardiomyocytes of ADR-treated rats (P<0.01). Conclusions: FDP might alleviate the cardiotoxic effects induced by ADR through decreasing calcium level as well as increasing SRCa2 -ATPase activity in cardiomyocytes. 相似文献
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Sitthichai IAMSAARD Jaturon BURAWAT Pipatpong KANLA Supatcharee ARUN Wannisa SUKHORUM Bungorn SRIPANIDKULCHAI Nongnut UABUNDIT Jintanaporn WATTATHORN Wiphawi HIPKAEO Duriya FONGMOON Hisatake KONDO 《Journal of Zhejiang University. Science. B》2014,15(6):548-555
Background
Ketoconazole (KET), an antifungal drug, has adverse effects on the male reproductive system. Pre-treatments with antioxidant plant against testicular damage induced by KET are required. The flowers of Clitoria ternatea (CT) are proven to have hepatoprotective potential. However, the protective effect on KET-induced testicular damage has not been reported.Objective
To investigate the protective effect of CT flower extracts with antioxidant activity on male reproductive parameters including sperm concentration, serum testosterone level, histopathology of the testis, and testicular tyrosine phosphorylation levels in rats induced with KET.Methods
The antioxidant activity of CT flower extracts was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Male rats were treated with CT flower extracts (10, 50, or 100 mg/kg BW) or distilled water via a gastric tube for 28 d (preventive period: Days 1–21) and induced by KET (100 mg/kg BW) via intraperitoneal injection for 7 d (induction period: Days 22–28). After the experiment, all animals were examined for the weights of the testis, epididymis plus vas deferens and seminal vesicle, serum testosterone levels, sperm concentration, histological structures and diameter of testis, and testicular tyrosine phosphorylation levels by immunoblotting.Results
The CT flower extracts had capabilities for DPPH scavenging and high reducing power. At 100 mg/kg BW, the extract had no toxic effects on the male reproductive system. Significantly, in CT+KET groups, CT flower extracts (50 and 100 mg/kg BW) alleviated the reduction of reproductive organ weight parameters, testosterone levels, and sperm concentration. In addition, CT flower extracts gave protection from testicular damage in KET-induced rats. Moreover, in the CT100+KET group, CT flower extracts significantly enhanced the expression of a testicular 50-kDa tyrosine phosphorylated protein compared with that of other groups.Conclusions
C. ternatea flower extracts possessing antioxidant activity are not harmful to the male reproductive system and can protect against testicular damage in KET-induced rats. 相似文献15.
藿槲洋参茶(HY)含有12种微量元素、维生素B系以及C,能明显抑制小鼠心、肝的脂质过氧化,协同戊巴比妥钠的睡眠作用,延长小鼠常压耐缺氧、游泳和爬杆时间。对小鼠灌胃的最大耐受量为62.4g/kg。 相似文献
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急性毒性试验结果表明,NIH小鼠对追风透骨丸的最大耐受量为120g/kg.追风透骨丸12,6,3g/kg可显著延长小鼠热板法致痛的痛阈值,并有量效关系;3个剂量组也可显著抑制醋酸所致的小鼠扭体反应;对棉球所致大鼠肉芽组织增生及鸡蛋清引起的大鼠关节肿胀均有显著的抑制作用。3个剂量组均可显著延迟大鼠实验性体内血栓形成;高剂量组使血浆凝血酶原时间,凝血酶原消耗时间,白陶土部分凝血活酶时间延长;3个剂量组可使大鼠肠系膜微循环血流速度增加,改善微循环状态,降低全血粘度和血浆粘度,并有一定的抗菌作用,对链球菌的最小抑菌浓度为50g/L. 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＡｃｕｔｅｒｅｎａｌｆａｉｌｕｒｅ(ＡＲＦ),ｕｓｕａｌｌｙｒｅｆｅｒｒｅｄｔｏａｓａｃｕｔｅｔｕｂｕｌａｒｎｅｃｒｏｓｉｓ,ｉｓａｃｏｍｍｏｎｓｙｎｄｒｏｍｅｃｈａｒａｃｔｅｒｉｚｅｄｂｙａｎａｂｒｕｐｔａｎｄｓｕｓｔａｉｎｅｄｄｅｃｌｉｎｅｉｎｇｌｏｍｅｒｕｌａｒｆｉｌｔｒａｔｉｏｎｗｉｔｈｒｅｓｕｌｔａｎｔａｚｏｔｅｍｉａ,ｃａｕｓｅｄｂｙａｃｕｔｅｉｓｃｈｅｍｉｃａｎｄ/ｏｒｔｏｘｉｃｉｎｊｕｒｉｅｓ.Ｉｔｉｓｎｏｔｉｍｍｅｄｉａｔｅｌｙｒｅｖｅｒｓｉｂｌｅｗｈｅｎｃａ… 相似文献
19.
Stephen A. Shumake Ray T. Sterner Stanley E. Gaddis Kenneth A. Crane 《Learning & behavior》1982,10(4):499-504
The effects of select drugs, dosages, and modes of administration upon learned taste aversions were compared among groups of wild-caught male and female Philippine rice rats (R. r. mindanensis). Experiment 1 compared two-choice saccharin aversions for 28 days among groups intubated with copper sulfate, cyclophosphamide, lithium chloride, red squill, sodium chloride (control), or deionized water (control). Main results were that 375 mg/kg lithium chloride produced the greatest sustained aversions, whereas 198 mg/kg cyclophosphamide and 210 mg/kg red squill produced moderate aversions, with males showing more resistance to extinction than females. Experiment 2 compared saccharin aversion among matched groups of male and female rats that received low (36 mg/kg), moderate (105 mg/kg), or high (368 mg/kg) dosages of lithium by gavage, ip injection, or ingestion. Sex differences in rates of extinction were found for the ingestion and injection-dosed rats, but no sex difference was again found for rats dosed by gavage. A significant mode × day interaction indicated that extinction progressed more rapidly for rats dosed by gavage. For all modes of administration, high dosages yielded intense 28-day aversion, moderate dosages produced intermediate 3–5 day aversion, and low dosages caused no aversion. 相似文献
20.
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