雷公藤总甙(TⅡ)中雷藤氯内酯醇的高效液相色谱分析

建立了雷公藤总甙(T_1)中雷藤氯内酯醇的高效液相色谱分析方法。采用μ-Bondapak C_(18)柱和46％甲醇-水流动相,紫外检测波长219nm。考察了雷藤氯内酯醇的稳定性,雷藤氯内酯醇在0.5～10.0μg/ml范围内线性良好,回收率在98％～101％之间。     

雷公藤多甙对小鼠Ⅳ型超敏反应影响的研究

采用动物实验，选择Ⅳ型超敏反应局部渗出性改变、Ｔ细胞增殖能力的强弱和病理形态学观察等指标，研究了雷公藤多甙（ＴｒｉｐｔｅｒｙｇｉｕｍＷｉｌｆｏｒｄｉｉＰｏｌｙｇｌｙｃｏ－Ｓｏｄｉｕｍ，ＴＷＰ）对ＯＴ诱导的Ⅳ型超敏反应小鼠模型的影响。结果表明，经ＴＷＰ灌胃９～１５天的小鼠，发敏的局部渗出性改变明显降低，与未给药的模型组相比，Ｐ＜０．０５，病理形态学观察结果亦与之相符。ＴＷＰ的这种作用可能与已报道的其多种免疫抑制效应有关。     

Clinical observations on the use of the Chinese herbTripterygium wilfordii Hook for the treatment of nephrotic syndrome

A preparation of extracts from the root of the Chinese medicinal herbTripterygium wilfordii Hook was administered orally at a dose of 1 mg/kg body weight per day to 13 children with idiopathic nephrotic syndrome. Eight children, including 4 who were steroid resistant, went into remission which was maintained in 4 for up to 3 years after withdrawal of treatment. In 3 children the proteinuria lessened with the return of plasma protein concentration to normal, and in 1 child this improvement was maintained for 4 years after treatment ceased. No serious side-effects were noted, but a temporary anti-fertility activity has been noted in other studies of both men and women.     

肉苁蓉总苷对阿霉素所致小鼠心肌毒性的保护作用

目的：探讨肉苁蓉总苷（GCs)对阿霉素（Dox)所致小鼠心肌损害的保护作用及其机制。方法：选用NIH小鼠一次腹腔注射Dox(17.5mg/kg)造成急性心肌损伤模型，测定心肌超氧化物歧化酶（SOD）活性；硒－谷胱苷肽过氧化物酶（Se-GSH-Px)活性；丙二醛（MDA）含量及血清肌酸磷酸激酶（CPK）活性。电镜检查心肌细胞超微结构的改变。结果：腹腔注射Dox 48h后可致小鼠心肌明显损害，心肌SOD及Se-GSH-Px活性下降，MDA含量升高，血清中CPK的活性增强，同时出现心肌组织超微结构的损伤。GCs(62.5、125.0、250.0mg/kg）能增加心肌SOD、Se-GSH-Px活性，降低MDA含量，减少CPK释放，减轻心肌超微结构的损伤。结论：肉苁蓉总苷对阿霉素所致心肌损害有一定的保护作用，其机制可能与其保护心肌SOD及Se-GSH-Px活性及其清除自由基，防止脂质过氧化有关。     

昆明山海棠碱对Jurkat淋巴瘤细胞株的细胞周期和凋亡时相的影响

目的 探讨昆明山海棠(THH)碱对Jurkat T淋巴瘤细胞的细胞毒性、细胞周期和凋亡时相特异性的影响，以了解THH碱诱导细胞凋亡的机制。方法 台盼蓝染色法检测细胞生长和细胞活力；DNA染色法、TUNEL标记结合流式细胞术检测细胞周期和凋亡时相特异性。结果 THH碱能有效抑制Jurkat细胞增殖、细胞活力下降，细胞在增殖周期中被阻滞于G1期。THH碱首先能诱导S、C2／M期细胞凋亡，同时能诱导G1期细胞凋亡。结论 提示THH碱能抑制Jurkat细胞的DNA合成，抑制细胞增增殖，并可显著诱导各期相细胞发生凋亡。     

雷公藤多甙与棉酚合用对雄大鼠生育力的影响

本研究探讨雷公藤多甙(GTW)与棉酚合用对雄大鼠生育力的影响。SD雄大鼠用棉酚及GTW各6 mg/kg/d,灌胃给药,每周6日,共11周。10只用药动物全部不育,附睾精子密度和活率也明显下降,而体重增长如常,性行为存在。睾丸光镜下结构绝大多数无明显异常,血清睾酮水平正常,副性腺重量无明显变化。停药6周后生育力恢复。在相同剂量下,单用GTW或棉酚均无抗生育效果。表明两药合用有相加作用,为减少棉酚和GTW副作用提供一条可能途径。     

Reversal of toxic and non-toxic effects of digoxin by digoxin-specific fab fragments in isolated human ventricular myocardium

Summary The time course of the reversal of toxic and nontoxic effects of digoxin by digoxin-specific antibody fragments (Fab) was measured in isolated human ventricular myocardium. A concentration of 2×10^–6 mol/l digoxin was used to produce positive inotropy followed by mechanical signs of toxicity. After addition of a 1.5-fold higher molar concentration of digoxin-specific Fab, signs of toxicity disappeared within 30 min and digoxin-induced force of contraction decayed with a monoexponential time course with a half-life of 52 min. This rate of decay was almost identical to that observed for the dissociation of the digoxin-(Na⁺+K⁺)-ATPase complex in human heart cell membranes. It is concluded that (a) digoxin-specific Fab are capable of completely removing digoxin from its binding sites, (b) the maximal rate of removal of digitalis glycosides from the (Na⁺+K⁺)-ATPase is limited by the dissociation rate constant, and (c) there is a close correlation between the degree of binding of digitalis glycosides to the (Na⁺+K⁺)-ATPase and the increase in force of contraction.Abbreviation Fab Fragment antibody binding (digitalis antidote)     

雷公藤单体T_4体外给药对IL－2R表达的影响

Ｔ_Ⅱ是中草药雷公藤的一类粗提物，临床治疗类风湿关节炎和系统性红斑狼疮等免疫性疾病效果显著。Ｔ_４是进一步从Ｔ_Ⅱ中提取出的单体成分。以正常人外周血单个核细胞（ＰＢＭＣ）为实验材料，测定了不同浓度的Ｔ_Ⅱ（０．０９８～３．１３Ｕ／ｍｌ）和Ｔ_４（０．０３９～５ｎｇ／ｍｌ）对于Ｔ细胞功能的影响。结果表明，Ｔ_Ⅱ和Ｔ_４对Ｔ细胞表面ＩＬ－２Ｒ的表达剂量相关的抑制作用。结果还显示，在药物作用下，ＩＬ－２对ＩＬ－２Ｒ表达的调节作用是很有限的。