蛇床子水提取液抑瘤作用的实验研究

目的 :研究蛇床子水提取液的体内抗肿瘤作用。方法 :通过 S180 肉瘤移植建立荷瘤小鼠模型 ,给予不同剂量蛇床子水提取液后观察 S180 荷瘤小鼠肿瘤生长曲线、血清唾液酸 (SA)、瘤重及小鼠生存天数的变化。结果 :蛇床子水提取液能明显抑制肿瘤生长 ,降低荷瘤小鼠血清 SA水平 ,0 .0 6mg/(g· d) ,0 .1 1 mg/(g· d)、0 .2 1 mg/(g· d)剂量组平均瘤重低于肿瘤对照组 (P<0 .0 5 ) ,抑瘤率依次为 2 3 .2 %、2 9.1 %和 2 4 .8%,且能延长荷瘤小鼠生存天数 (P<0 .0 1 ) ,动物生命延长率依次为 :2 6 .9%、3 4 .8%和 2 6 .6 %。结论 :蛇床子水提取液具有较强的抗肿瘤效应 ,有很好的利用前景 ,值得对其进行深入研究。     

利用主客体分子包结现象选择分离蛇床子有效成分的方法

利用1,1,6-四苯基-2,4-已二炔-1,6-二醇(I)的包结能力,可简单而迅速地从蛇床子中选择分离出有效成分欧前胡素(2)和花椒毒素(3),收率分别为0.054%(2)和0.002%(3)。本文用UV,IR,¹HNMR和¹³CNMR验证了2和3的化学结构,并用HPLC检验了2和3的纯度。X-射线衍射晶体结构分析表明主体分子I与组分2靠氢键形成包结物,它们的摩尔比为1:2,氢键长为2.8612A。包结物晶体属单斜晶系,空间群为已P₂₁/C,晶胞参数:a=15.468(5)A,b=8.595(3)A,c=18.663(7)A,β=93.64(5)°,Z=4和R=0.088。     

蛇床子化学成分及抗肿瘤活性的研究进展

中药蛇床子Cnidium momnieri的主要药理活性成分是香豆素类化合物和挥发油,另外还含有单萜多醇,糖类成分,以及近来新发现的倍半萜类成分等。近年来国内外对蛇床子抗肿瘤活性的研究较为活跃,其抗肿瘤作用是多方面的综合作用,包括直接的抑瘤作用,抗突变活性,逆转肿瘤多药耐药性,以及免疫增强作用等。综述了近10年来国内外对蛇床子的化学成分,抗肿瘤作用及相关方面的研究进展,以促进蛇床子抗肿瘤研究的深入。     

气相色谱-质谱联用法测定蛇床子超临界二氧化碳流体提取物中蛇床子素含量

目的 建立气相色谱-质谱联用法测定蛇床子超临界二氧化碳(C02)流体提取物中蛇床子素的含量.方法 样品采用C02超临界流体萃取,萃取液用乙酸乙酯溶解,选择监测离子法测定蛇床子素的含量.色谱条件:DB-5 MS(30 m×0.32 mm,0.25 μm)石英毛细管色谱柱;柱流速2.0 mL·min-1,柱温60℃保持2 min,以10℃·min-1到280℃,保持6 min;进样口和接口温度为280 ℃.结果 蛇床子素在5～1 000μg·mL-1线性关系良好,r=0.999 1,平均回收率为98.97％,检测限1.0 ng·mL-1.结论 该方法稳定可靠,适用于蛇床子药材的质量控制.     

基于热休克蛋白家族分析醇提蛇床子对红色毛癣茵抗真菌作用的机制

目的:检测醇提蛇床子对红色毛癣菌的作用及其机制.方法:利用连续稀释法检测醇提蛇床子对红色毛癣菌增殖的抑制作用并计算最低抑菌浓度.利用Real-time PCR和Western印迹检测红色毛癣菌中热休克蛋白(heat shock protein,Hsp)家族蛋白的变化.结果:醇提蛇床子可以抑制红色毛癣菌的增殖.经醇提蛇床子处理的红色毛癣菌中Hsp60和Hsp90 mRNA和蛋白含量降低.结论:醇提蛇床子可以通过抑制Hsp60和Hsp90的表达抑制抑制红色毛癣菌的增殖.     

蛇床子总黄酮对去卵巢骨质疏松大鼠股骨骨密度及生物力学的影响

目的探讨蛇床子总黄酮对去卵巢（OVX）骨质疏松大鼠股骨骨密度及股骨生物力学的影响。方法40只6、7月龄雌性SD大鼠随机分为4组：假手术（SHAM）组,去卵巢（OVX）组,OVX＋已烯雌酚（E）组和OVX＋蛇床子总黄酮组,每组10只。实行手术后,于术后第三天开始灌胃用药。90天后处死大鼠,取左测股骨进行股骨骨密度和股骨生物力学的测量。结果去卵巢后股骨骨密度及股骨生物力学指标明显下降;用蛇床子总黄酮后,股骨骨密度及股骨生物力学指标均增高。结论蛇床子总黄酮对去卵巢（OVX）造成的骨质疏松有一定的防治作用,能防止骨生物力学性能的受损,效果略逊色于已烯雌酚。     

Petroleum ether extract of Cnidium monnieri ameliorated scopolamine-induced amnesia through adrenal gland-mediated mechanism in male rats

AIM: Our previous study indicated petroleum ether layer of Cnidium monnieri L. Cuss. (CM) and its ingredient osthole could alleviate scopolamine-induced amnesia in female rats. MATERIALS AND METHODS: Hence, this study was desired to investigate the mechanism of the ameliorating effects of petroleum ether layer of CM on the performance impairment of inhibitory avoidance task and Morris water maze induced by scopolamine in male rats. RESULTS: CM at 0.1-0.6g/kg orally administered 60 min before the training trial ameliorated the scopolamine-induced performance impairment on inhibitory avoidance learning and water maze in male rats. Only adrenalectomy but not peripheral cholinergic antagonist scopolamine methylbromide and catecholaminergic neurotoxin 6-hydroxydopamine blocked the ameliorating effects of CM on scopolamine-induced performance impairment in rats. CONCLUSION: Therefore, we demonstrated that the ameliorating effects of CM on scopolamine-induced performance impairment may be related to activating the adrenal gland and central acetylcholingeric neuron, instead of peripheral nervous system.     

Antistress effects of bacosides of Bacopa monnieri: modulation of Hsp70 expression,superoxide dismutase and cytochrome P450 activity in rat brain

The antistress effect of bacosides of Brahmi (Bacopa monnieri, BBM), dissolved in distilled water, was -studied in adult male Sprague Dawley rats by administering oral doses of 20 and 40 mg/kg for 7 consecutive days. In half of the animals treated with 20 or 40 mg/kg of BBM, stress was given 2 h after the last dose. Stress was also administered to the animals treated with distilled water alone. BBM, at both doses, did not induce a significant change in the expression of Hsp70 in any brain region studied while stress alone produced a significant increase in the Hsp70 expression in all the brain regions. A significant decrease in the activity of superoxide dismutase (SOD) was evident in the hippocampus with the lower dose of BBM and in animals given stress alone, while an increase in the activity of SOD was observed in the brain regions with the higher dose of BBM. An increase in the activity of cytochrome P450 (P450) dependent 7-pentoxyresorufin-o-dealkylase (PROD) and 7-ethoxyresorufin-o-deethylase (EROD) was observed in all the brain regions after exposure to stress alone and with both doses of BBM although the magnitude of induction of P450 expression was less with a higher dose of BBM. Interestingly, stress when given to the animals pretreated with BBM for 7 days resulted in a decrease in Hsp70 expression in all the brain regions with a significant decrease occurring only in the hippocampus. Likewise the activity of SOD was found to be further reduced in all the brain regions in the animals treated with the lower dose of BBM followed by stress. However, when stress was given to the animals pretreated with the higher dose of BBM, a significant increase in the enzyme activity was observed in the cerebral cortex and in the rest of the brain while the activity of SOD was reduced to a much greater extent in the cerebellum and in the hippocampus. Likewise, the activity of P450 enzymes was found to be restored to almost control levels in the animals given stress and pretreated with the higher dose of BBM, while a lesser degree of induction, compared with animals treated with BBM or stress alone, was observed in the animals pretreated with the lower dose of BBM and given stress. The data indicate that BBM has potential to modulate the activities of Hsp70, P450 and SOD thereby possibly allowing the brain to be prepared to act under adverse conditions such as stress.     

假马齿苋的化学成分和药理作用研究进展

假马齿苋是玄参科假马齿苋属植物,主要分布于热带和亚热带地区.其主要化学成分为三萜皂苷类化合物.现代药理研究表明假马齿苋对神经系统、消化系统和血液循环系统等均有作用,是一种有开发潜力的药用植物.现对国内外有关假马齿苋的化学成分、药理作用的研究成果进行综述,为全面开发利用假马齿苋提供参考.     

蛇床子挥发油化学成分的GC-MS分析

目的:用气相色谱-质谱法对蛇床子挥发油化学成分进行分析。方法:采用水蒸气蒸馏法从蛇床子中提取挥发油。用气相色谱-质谱法对化学成分进行鉴定。用归一化法确定其相对百分含量。结果:共鉴定了50个成分,占挥发油总成分的86％以上。结论:本方法稳定可靠,重现性好,适用于中药挥发油的化学成分分析。