白英提取液对Hela细胞凋亡及P53和Bcl-2蛋白表达的影响

目的探讨白英提取液对Hela细胞凋亡及野生型P53(wtP53)和Bcl-2蛋白表达的影响。方法采用MTT法检测细胞增殖抑制率,荧光显微镜检测癌细胞形态变化,TUNEL法检测凋亡率,二步法免疫组化检测P53和Bcl-2蛋白表达变化。结果白英提取液能够抑制Hela细胞增殖,且呈剂量依赖性;观察到凋亡细胞典型的形态特征;细胞凋亡率随白英提取液浓度增加而升高;P53蛋白表达显著上升(P<0.01),而Bcl-2蛋白表达明显下降(P<0.01)。结论白英提取液能促进Hela细胞凋亡,其分子机制可能与上调野生型P53蛋白表达和下调Bcl-2蛋白表达有关。     

复方龙葵胶囊抗肿瘤作用及其对肿瘤细胞周期分布的影响

目的验证复方龙葵胶囊抗肿瘤作用并初步探讨作用机制。方法采用肉瘤(S180)和肝癌(HepA)两种移植瘤模型,进行抑制肿瘤的实验,并应用流式细胞仪检测S180肿瘤细胞增殖周期。结果复方龙葵胶囊对S180肉瘤的抑制率大于20%,对HepA肝癌小鼠的生命延长率大于40%,可促进S180肿瘤细胞凋亡,使细胞周期阻滞于G0/G1期,减少增殖细胞在S期的分布。结论复方龙葵胶囊具有良好的抗肿瘤作用。     

龙葵全草皂苷类化学成分研究

目的研究龙葵Solanum nigrum全草的皂苷类化学成分。方法采用硅胶、反相ODS开放柱色谱及反相HPLC等手段分离化合物,运用波谱技术分析确定化学结构。结果龙葵全草60%乙醇提取物经D-101大孔树脂柱吸附,获得的60%乙醇洗脱部分再经分离得到8个化合物。利用理化及波谱分析确定这些化合物结构分别为uttroside B(Ⅰ)、uttroside A(Ⅱ)、22α,25R-26-O-β-D-吡喃葡萄糖基-22-羟基-呋甾-Δ5-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅲ)、22α,25R-26-O-β-D-吡喃葡萄糖基-22-甲氧基-呋甾-Δ5-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅳ)、5α,22α,25R-26-O-β-D-吡喃葡萄糖基-22-羟基-呋甾-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃葡萄糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅴ)、5α,22α,25R-26-O-β-D-吡喃葡萄糖基-22-甲氧基-呋甾-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃葡萄糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅵ)、dumoside(Ⅶ)、5α,20S-3β,16β-二醇-孕甾-22-羧酸-(22,16)-内酯-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅷ)。结论化合物Ⅲ～Ⅷ为首次从该属植物中分离得到。     

白英化学成分和药理作用研究进展

对白英的化学成分、药理作用和临床应用等方面进行综述,为白英的研究开发提供参考。白英中主要含有苷类、有机酸类、倍半萜类、甾醇类、香豆素以及其它化合物;具有良好的抗癌防癌、消除炎症、抗过敏及护肝等作用,在临床上具有广泛的应用价值。     

龙葵总碱对肿瘤细胞膜钠泵及钙泵活性影响的研究

目的：观察龙葵总碱对S180小鼠及H22小鼠肿瘤细胞膜Na^＋，K^＋-ATPase及Ca^＋＋，Mg^＋＋-ATPase活性的影响。方法：荷瘤小鼠分为治疗组（高剂量、中剂量、低剂量）和对照组（生理盐水组、环磷酰胺组），分别测定各组肿瘤细胞膜的Na^＋，K^＋ ATPase及Ca^＋＋，Mg^＋＋ -ATPase活性。结果：龙葵总碱对S180小鼠及H22小鼠肿瘤细胞膜Na^＋，K^＋ -ATPase及Ca^＋＋，Mg^＋＋ -ATPase活性均有明显的抑制作用，并且其抑制作用呈量效正相关。结论：龙葵总碱这一作用可能是其抗肿瘤作用机理之一。关键词：龙葵总碱肿瘤细胞膜钠泵钙泵     

龙葵碱对S180小鼠红细胞膜唾液酸和封闭度的影响

目的观察龙葵碱对S180小鼠红细胞膜唾液酸(SA)水平和红细胞膜封闭度的影响。方法采用比色法测定S180荷瘤小鼠的红细胞膜表面的SA水平和封闭度。结果龙葵碱能显著升高S180小鼠红细胞膜表面的SA水平和增加红细胞膜的封闭度,差异显著(P<0.05)。结论龙葵碱可能是通过增加红细胞膜表面的SA水平和增加封闭度来达到抗肿瘤作用的。     

白英化学成分的研究

目的 :对白英中的化学成分进行研究。方法 :大孔吸附树脂 ,sephadexLH-20 ,正相及反相硅胶柱色谱分离 ,光谱数据鉴定结构。结果 :分离鉴定了4个化合物 ,咖啡酸 ,香草酸 ,N(p-hydroxyphenethyl) p-coumaramide ,芦丁。结论 :4个化合物均为首次从该种植物中分离得到。     

Functional connectivity between forearm and digits representations in human somatosensory area 3b.

OBJECTIVE: We compared the effects of tactile interference to the forearm on magnetic responses evoked by electric stimulation of the little finger (D5) and the thumb (D1). METHODS: Electric stimulation was delivered to D5 or D1 individually. In each stimulus session, magnetic recordings were conducted with or without concurrent tactile interference to the radial side of the anterior forearm. RESULTS: With forearm interference, the amplitude of the primary response (N20m) following D5 stimulation was reduced to 90.7% of the control value without interference, while that following D1 stimulation was not affected (100.7%). CONCLUSIONS: In human somatosensory area 3b, the representation of the forearm is immediately adjacent to that of the D5, and distant from that of the D1. Thus, the result suggests that the tactile interference effect on N20m depends on the cortical distance between electrically and mechanically activated 3b areas. SIGNIFICANCE: Intrinsic synaptic connections between the 3b hand representation and its surroundings have been hypothesized as a neural basis for plastic changes of the human brain, such as a phantom hand phenomenon. The present finding implies that these connections may play some physiological roles even in normal adult humans.     

介绍几种残指延长拇指再造的方法

本文报告带血管神经蒂组织瓣移位及手残指缓慢长术治疗６４例拇指缺损，拇指平均延长２．６CＭ平均随访时间３年６个月，再造拇指外形及功能均较满意。本法简单，安全、有效。拇指掌指关节以远缺如，残端指骨延长术，不足１ＣＭ者可行第１掌骨延长术，二期行虎口加深术。掌指关节平面缺如采用第１掌骨延长术或带血管蒂皮瓣移位再造拇指。也可用带桡骨片的前臂桡侧皮瓣一期再造拇指。第１掌骨近侧平面缺如，由于骨缺损较多不宜选用残指延长术，以游离足趾移植再造拇指为首选。     

The effect of Solanum malacoxylon on rachitic bone lesions in the rat

Summary The plant Solanum malacoxylon (S.M.) is known to cause severe soft tissue calcifications in cattle and sheep and has recently become of special, interest since it exerts biological actions which resemble those of vitamin D. In order to investigate whether S.M. is capable to improve the rachitic bone changes in vitamin d and phosphate deficient rats, a watery extract of 50, 100 and 200 mg S.M. was fed daily to these animals over a period of 10 days. The width of epiphyseal plates was compared after that time with those of rats treated with 0, 0.225, 0.45 and 0.9 IU of vitamin D₃ daily. There was a dose related curative effect of S.M. on the epiphyseal lesions very similar to that of vitamin D₃. The hypercalcemic and hyperphosphatemic effect of S.M. was identical to that of vitamin D₃. The 25-hydroxy-vitamin D serum levels remained almost undetectable, in the S.M. treated rats as well as in the vitamin D₃ treated animals.Supported by the Deutsche Forschungsgemeinschaft.