板蓝根泡腾片浸膏中腺苷和(R,S)-告依春的含量测定

目的:建立板蓝根泡腾片浸膏中腺苷和(R,S)-告依春含量的高效液相色谱测定方法。方法:高效液相色谱仪Waters 2695-2487;Diamonsil C18柱(250 mm×4.6 mm,5μm);柱温:30℃;流动相:甲醇-水(10:90);流速为1.0mL/min;检测波长:255nm。结果:精密度和稳定性均良好,腺苷的质量浓度在1.012μg/mL~30.36μg/mL范围内,线性关系良好,r=1,平均回收率为96.7%,RSD为1.1%;(R,S)-告依春的质量浓度在2.042μg/mL~61.26μg/mL范围内,线性关系良好,r=1,平均回收率为97.9%,RSD为0.7%。结论:该法简便快速,结果准确,重复性好,可作为板蓝根泡腾片浸膏的质量控制方法。     

《内蒙古植物志》第二版菘蓝属的订正

《内蒙古植物志》第二版十字花科菘蓝属中长圆果菘蓝的依据标本应为三肋菘蓝,在内蒙古没有长圆果菘蓝的分布;菘蓝的依据果实标本应为欧洲菘蓝,而欧洲菘蓝的依据标本应为菘蓝。     

菘蓝的组织培养

本文报道了菘蓝的组织培养,探讨了外植体部位、外源植物激素的种类、浓度等对培养效果的影响。初步筛选出较好组合的培养基是:Ms+6-BA 1mg/L.+IBA lmg/L.简介了菘蓝试管苗移栽的方法。     

Improved Synthesis of Indirubin Derivatives by Sequential Build‐Up of the Indoxyl Unit: First Preparation of Fluorescent Indirubins

Indirubin, present in extracts of Isatis tinctoria and some other plant species, has promising cytotoxicity against a variety of cell lines by inhibition of cyclin‐dependent kinases. Chemical synthesis of its derivatives relies on the combination of isatins and 2,3‐dihydro‐1H‐indol‐3‐one (‘indoxyl’) derivatives and usually yields indigo as well as other by‐products. Inspection of the hydrolysis of the long‐known condensation products of 2‐thioxothiazolidin‐4‐one with isatins gave useful hints for an improved synthesis of indirubins: this reaction does not yield quinoline derivatives but 2‐(2,3‐dihydro‐2‐oxo‐1H‐indol‐3‐ylidene)‐2‐sulfanyl acetic acids. By substitution of the sulfanyl group in this oxindoles with anilines and straightforward cyclization under Nazarov conditions, a broad variety of indirubins substituted in the indoxyl ring system are thus available, usually in very good purity and yield. Use of naphthylamines in this reaction sequence yields various fluorescent substances with λ_fl at ca. 630 nm.     

板蓝根生药中蛋白质提取方法的比较

分别以40％乙醇、20％乙醇和0．02mol／L盐酸3种提取液来提取生药板蓝根中的蛋白质，并以Tris-HCl缓冲液为对照，用752紫外分光光度计测定各样品提取液的O．D值，计算蛋白质的含量：蛋白质浓度(mg／mL)=1．45D280-0．74D260，同时测定各样品的血凝活性，并对板蓝根中蛋白质含量与血凝活性的相关性进行了分析．实验结果表明：3种提取液对同一种板蓝根生药中蛋白质的提取量存在显著差异，其中以40％乙醇为提取液所测得的蛋白质含量最高，但蛋白质含量多少与血凝活性之间并无明显相关性．     

4种抗生素对菘蓝外植体生长的影响

对抗生素卡拉霉素和潮霉素进行菘蓝外植体抗性浓度筛选，结果表明不同外植体具有不同抗性．子叶芽分化阶段，卡拉霉素和潮霉素筛选浓度范围分别为10-50mg／L和5-30mg／L；下胚轴芽分化阶段的筛选浓度分别为15-50mg／L和10-30mg/L；分化苗生根时筛选浓度分别为30mg/L和20mg/L．芽分化阶段宜使用头孢霉素为抗菌剂，但分化苗生根时宜选用羧苄青霉素．     

正交设计在欧洲菘蓝组织培养中的应用

以欧洲菘蓝下胚轴和子叶为外植体,应用正交设计方法,对愈伤组织的诱导和分化培养基进行了优化筛选.分析结果表明,6-BA和2,4-D的交互作用对下胚轴愈伤组织的诱导有显著影响,结合直观分析确定下胚轴的愈伤组织最佳诱导培养基为MS 6-BA 0.5 mg.L-1(后同) 2,4-D 0.5;6-BA和NAA的交互作用对子叶愈伤组织诱导有极显著影响,结合直观分析确定子叶最佳诱导培养基为MS 6-BA 0.5 NAA 0.2.在不同培养基对欧洲菘蓝愈伤组织分化能力的影响试验中,各种因子在所试浓度范围内的作用均不显著,有待进一步试验.根据直观分析我们认为MS 6-BA 2 NAA 1诱导的愈伤组织更有利于分化.不定芽在转移到MS NAA 0.5一个月后80%以上都能长出很好的根系.生根后的组培苗经过3天炼苗后移栽至花盆后80%以上可以存活.     

Dihydroxyquingdainone Induces Apoptosis in Leukaemia and Lymphoma Cells via the Mitochondrial Pathway in a Bcl-2- and Caspase-3-Dependent Manner and Overcomes Resistance to Cytostatic Drugs In Vitro

Isatis tinctoria and its indigo dyes have already provided highly active anti-leukaemic lead compounds, with the focus mainly being on indirubin, whereas indigo itself is inactive. There are many more indigoids to find in this plant extract, for example, quingdainone, an indigoid derived from tryptanthrin. We present here a new synthesis of hitherto neglected substituted quingdainones, which is very necessary due to their poor solubility behaviour, and a structure-dependent anti-leukaemic activity study of a number of compounds. Substituted α-phenylaminoacrylic acid was synthesised by hydrogen sulfide extrusion from an analogue mercaptoacetic acid, available from the condensation of rhodanin and a substituted tryptanthrin. It is shown that just improving water solubility does not increase anti-leukaemic activity, since a quingdainone carboxylic acid is inactive compared to dihydroxyquingdainone. The most effective compound, dihydroxyquingdainone with an AC₅₀ of 7.5 µmole, is further characterised, revealing its ability to overcome multidrug resistance in leukaemia cells (Nalm-6/BeKa) with p-glycoprotein expression.     

板蓝根木脂素苷A的平面结构研究

经过溶剂法和各种色谱方法从十字花科菘蓝属植物板蓝根（Isatis indigotica Fort .）的抗病毒有效部位中分离得到1个化合物：板蓝根木脂素苷 A（Indigoticoside A；3 -(4 -O-β-D-glucopyranosyl-α-hydroxy-3-methoxy-benzyl)-4-(4-hydroxy -3-methoxy-benzyl)tetrahydrofuran）. 通过谱学分析（¹H NMR、¹³ C NMR和2D NMR）对该新化合物的碳氢信号进行了确切归属.     

Isolation,structural determination and cytotoxic activity of two new ceramides from the root of <Emphasis Type="Italic">Isatis indigotica</Emphasis>

Two new ceramides were isolated from the 95% EtOH extract of traditional Chinese medicinal plant Isatis indigotica. Their structures were elucidated as 1-O-β-D-glucopyranosyl-(2S, 3R)-N-(2′-hydroxype-ntacosanoyl)-octadeca-11E-sphingenine (1) and 1-O-β-D-glucopyranosyl-(2S,3R)-N-(2′-hydroxyhe xacosanoyl)-octadeca-11E-sphingenine (2) on the basis of spectroscopic data. Their cytotoxic effects were evaluated by using MTT method.