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1.
探讨金樱子多糖的含量及其单糖组成,为金樱子质量评价及临床用药提供参考依据。本文采用水提-醇沉法获得金樱子多糖,以葡萄糖为标准品,蒽酮-硫酸比色法测定多糖含量;多糖酸解后经三甲基硅烷(TMS)衍生化,以标准品单糖为对照,采用气-质联用法(GC-MS)测定多糖的单糖组成。结果表明,本实验条件下,测得金樱子多糖提取得率为29.38%;金樱子多糖中单糖由阿拉伯糖、鼠李糖、木糖、甘露糖、半乳糖、葡萄糖、果糖组成,其中葡萄糖、甘露糖、果糖和半乳糖在金樱子多糖中占比较大,分别为65.03%、7.36%、16.11%及8.87%。  相似文献   

2.
多糖是药用植物金樱子所含有的数种主要生物活性物质之一,其具有多种生物活性,厘清该成分的作用效应具有重要意义。本文通过将黔产金樱子制备为金樱子粉末、分离纯化得到活性成分金樱子多糖;采用磺酰罗丹明染色法测定其对人肝癌细胞BEL-7402以及人正常肝细胞HL-7702增殖的影响并比较。发现金樱子提取物中所存在的多糖类化合物对体外培养的人肝癌细胞BEL-7402的增殖具有一定抑制作用,其半数抑制浓度为(12.43±1.95)μmol/L;且对体外培养的人正常肝细胞HL-7702的毒性较低,其半数抑制浓度为(31.04±3.68)μmol/L。初步证明金樱子提取物中含有的多糖类化合物具有一定的体外抗肿瘤活性,作为低毒性的天然提取物,具有广阔的抗肿瘤前景。  相似文献   

3.
金樱子多糖的抑菌和抗炎作用研究   总被引:20,自引:0,他引:20  
研究了金樱子多糖的抗菌活性和抗炎作用。实验表明:金樱子多糖具有一定的抑菌活性,如对大肠杆菌、副伤寒杆菌、白葡萄球菌以及金黄色葡萄球菌等均有较强的抑制作用;能抑制二甲苯引起小鼠的耳肿胀,与NS组比较有明显差异(P<0.01),具有一定的抗炎作用。  相似文献   

4.
皖西大别山区金樱子野生资源贮备量的调查研究   总被引:10,自引:0,他引:10  
本文采用不同地段金樱子多度调查,样方调查等方法,对皖西大别山区野生金樱子的资源储备量作了调查研究,提出了该区金樱子年产量的计算方法,并对金樱子的进一步开发提出建议。  相似文献   

5.
金樱子提取液体外抗氧化作用研究   总被引:1,自引:0,他引:1       下载免费PDF全文
目的:探讨金樱子(Rosa Laevigata Mickx.,RLM)提取液的体外抗氧化活性,以更好的评估金樱子的作用。方法:通过体外实验研究金樱子提取液对羟自由基(-OH)、超氧阴离子(O2-)的清除作用;研究金樱子水提取液对正常大鼠肝、肾组织匀浆脂质过氧化产物丙二醛(Malondialdehyde,MDA)生成的影响以及金樱子水提取液对过氧化氢(H2O2)诱导的红细胞氧化溶血的保护作用。结果:金樱子提取液清除-OH及O2-作用呈现出明显的剂量依赖性,可显著抑制大鼠离体肝、肾组织中MDA的生成,还可以明显抑制H2O2诱导的大鼠红细胞氧化性溶血。结论:金樱子提取液体外具有明显的抗氧化活性。  相似文献   

6.
金樱子资源的开发利用   总被引:7,自引:0,他引:7  
金樱子资源的开发利用顾志平,张曙明,刘东(中国医学科学院药用植物资源开发研究所北京100094)金樱子(BosaleavigataMichx.)是蔷薇科蔷薇属植物,果富含维生素,民间早有食用习惯,亦为我国较常用的中药,历史悠久,现代研究表明,金樱子有...  相似文献   

7.
中药金樱子的研究应用概况   总被引:20,自引:2,他引:18  
本文就国内外对中药金樱子的化学成分及其提取分离方法、药理学研究和临麻应用作了综述,为金樱子的综合开发提供依据。  相似文献   

8.
目的:研究金樱子对糖尿病大鼠单核细胞趋化因子-1(MCP-1)表达的影响.方法:用STZ腹腔注射诱导建立SD大鼠糖尿病模型后,随机分为糖尿病模型组和金樱子干预组,同时另设正常对照组和金樱子对照组.测定大鼠血糖、血肌酐(Scr)、血尿素氮(BUN)、胆固醇(TC)、甘油三酯(TG)、24小时尿蛋白.HE染色观察肾组织病理改变、免疫组织化学、Western blot检测各组肾组织MCP-1表达情况.结果:金樱子能明显改善肾功能,降低实验性糖尿病大鼠血糖、血肌酐、血尿素氮、胆固醇、甘油三酯、24小时尿蛋白定量.形态学观察,糖尿病大鼠在金樱子干预后,肾小球硬化指数与肾小管损伤指数明显减小.免疫组织化学和Western bolt分析显示,MCP-1蛋白表达在糖尿病模型组中显著增强,而在金樱子干预组的表达显著减弱(P<0.05),但仍较正常对照组蛋白表达升高.结论:金樱子对糖尿病肾病具有防治作用,其机制可能与降低MCP-1表达有关.  相似文献   

9.
采用纸片扩散法和试管稀释法,研究金樱子茎不同溶剂粗提取物对临床常见病原细菌的抑菌活性。结果表明,金樱子茎水提取物对绿脓杆菌、痢疾杆菌、大肠杆菌、变形杆菌无抑菌活性;对伤寒杆菌的最低抑菌浓度(MIC)为20 mg(生药)/mL;对金黄色葡萄球菌的MIC为10 mg(生药)/mL。金樱子茎75%乙醇提取物对绿脓杆菌、伤寒杆菌、痢疾杆菌、大肠杆菌、变形杆菌无抑菌活性;对金黄色葡萄球菌MIC为10 mg(生药)/mL。金樱子茎乙酸乙酯、氯仿、石油醚提取物对绿脓杆菌、伤寒杆菌、痢疾杆菌、大肠杆菌、金黄色葡萄球菌、变形杆菌无抑菌活性。  相似文献   

10.
目的:研究金樱子提取液对糖尿病肾病(Diabetic Nephropathy,DN)大鼠的肾脏保护作用。方法:在高糖高脂饲料喂食SD(Sprague-Dawley)大白鼠的基础上腹腔注射链脲佐菌素(streptozotocin,STZ)诱导糖尿病肾病大鼠模型,随机分为糖尿病肾病模型组(DN组)和金樱子治疗组(DN+RLM组),同时另设正常对照组(NC组)和金樱子对照组(NC+RLM组)。检测金樱子提取液对各组大鼠血糖(fasting blood-glucose,FBG)、糖化血红蛋白(glycosylated haemoglobin,GHb)、24小时尿微量白蛋白和尿量、血尿素氮(BUN)、血肌酐(Scr)、胆固醇(TC)、甘油三酯(TG)及肾脏结构的影响。结果:与DN大鼠相比,糖尿病肾病大鼠经金樱子提取液治疗后,大鼠FBG、GHb水平、24 h尿微量白蛋白、24 h尿量、肾脏指数明显降低,血脂紊乱、肾功能损害以及DN肾脏病理明显改善,且无明显副作用。结论:金樱子提取液可明显降低DN大鼠血糖,改善DN大鼠血脂、肾功能紊乱及肾脏病理变化,对糖尿病大鼠肾脏具有较强的保护作用。  相似文献   

11.
The structure of the capsular polysaccharide from Klebsiella type 55 has been investigated by using the techniques of methylation, Smith periodate oxidation, and partial, acid hydrolysis. The anomeric configurations of the glycosidic linkages were determined by performing 1H-n.m.r. and 13C-n.m.r.spectroscopy on the polysaccharide and derived poly- and oligo-saccharides obtained through degradative procedures. The position of the O-acetyl group was located by devising an improved method for its replacement by a methyl ether group. The structure was shown to consist of the following tetrasaccharide repeating unit.  相似文献   

12.
When the extracellular polysaccharide from the black yeast NRRL Y-6272, composed of two parts N-acetyl-D-glucosamine and one part N-acetyl-D-glucosaminuronic acid, is isolated at maximum culture viscosity, adhering black pigment gives the polysaccharide preparations a gray-to-black appearance. Precipitation of the polysaccharide from cell-free culture supernatants with either ethanol of hexadecyltrimethylammonium bromide failed to remove the pigment. Various other methods were therefore tried for obtaining a high-viscosity polysaccharide product free of pigment. By systematically varying ingredients of defined and semidefined media, an improved medium was found that not only gave polysaccharide preparations of increased viscosity, but also increased yield. A key ingredient in this medium is L-asparagine. Also, adding autoclaved bovine serum albumin or egg albumin to this medium at the time of inoculation allowed a pigment-free polysaccharide to be isolated by standard procedures. None of several other proteins of synthetic polyamides tested were as effective as bovine serum albumin or egg albumin. In an alternate approach, pink mutants obtained by irradiation of the parent black strain with ultraviolet light, apparently produce the same extracellular polysaccharide free of any pigment but in lower yields or inferior in quality.  相似文献   

13.
The structure of the capsular polysaccharide from Klebsiella type 59 has been investigated by methylation analysis, a modified Smith-degradation procedure, and uronic acid degradation followed by oxidation and elimination of the substituents of the oxidized residue. The oligomeric fragments produced by these degradative procedures were isolated and characterized. O-Acetyl groups were identified and their position determined. The polysaccharide consists of the following pentasaccharide repeating-unit (dotted lines indicate that only some of the residues carry the O-acetyl substituent). See article.  相似文献   

14.
Hyaluronate has been labelled with fluorescein groups by two procedures. Products with degrees of substitution ((d.s.) between 0.05 and 0.001 were obtained. Physico-chemical analysis (viscometry, gel chromatography, and measurements of sedimentation and diffusion coefficients) of the parent compound and the products showed that the labelling procedures caused only a limited degradation of the polysaccharide.  相似文献   

15.
Glycosaminoglycans were extracted from bovine liver capsule with 4 M-guanidinium chloride, resulting in solubilization of approx. 90% of the total uronic acid-containing polysaccharide of the tissue. The extracted polysaccharide was purified and fractionated by anion-exchange chromatography on DEAE-cellulose, density-gradient ultracentrifugation in CsCl and finally gel chromatography on Sepharose 4B. By using these procedures, the two major polysaccharide components, dermatan sulphate and heparin, which constituted 55 and 30% respectively of the total glycosaminoglycan content of the tissue, were separated from each other. Analysis of the macromolecular properties of the two polysaccharides showed that heparin existed exclusively as single polysaccharide chains, whereas dermatan sulphate occurred largely as a proteoglycan (protein content, 74% dry wt.). The purified heparin preparation was subjected to sedimentation-equilibrium ultracentrifugation, indicating a molecular weight of 8800. Analysis for neutral sugars (by g.l.c.) showed 0.1 residue of xylose and 0.2 residue of galactose/polysaccharide chain; serine amounted to 0.3 residue/polysaccharide chain. Reduction of the heparin with NaB3H4 resulted in incorporation of 3H, approximately corresponding to one reducible group/polysaccharide chain. The 3H-labelled sugar residue was liberated by a combination of acid hydrolysis and deaminative cleavage of the polysaccharide with HNO2; it was subsequently identified as an aldonic acid by paper electrophoresis. Most of the heparin chains thus contained a uronic acid residue in reducing position. It is suggested that heparin isolated from bovine liver capsule is a degradation product released from larger molecules by an endo-glycuronidase.  相似文献   

16.
The structure of the capsular polysaccharide from Klebsiella K79 was determined by the techniques of methylation, periodate oxidation, beta-elimination, chromic acid oxidation, and partial hydrolysis. N.m.r. spectroscopy (1H and 13C) was used extensively to establish the nature of the anomeric linkages of the polysaccharide and of oligosaccharides derived through degradative procedures. The polysaccharide was found to have the heptasaccharide, "5 + 2" repeating unit: (Formula: see text).  相似文献   

17.
目的:研究黄芪多糖和枸杞多糖的抑菌活性并探讨不同pH值对其抑菌活性的影响。方法:采用滤纸片扩散法,分析不同浓度黄芪多糖和枸杞多糖在不同pH值下对几种常见细茵和霉菌(大肠杆菌、沙门氏菌、金黄色葡萄球菌、黑曲霉、产黄青霉)的抑制效果。结果:对于细菌,枸杞多糖8mg/mL时出现抑菌圈,而黄芪多糖0.02 mg/mL时效果最佳;对于霉菌,随着枸杞多糖浓度的增大,抑菌圈的直径增大,而黄芪多糖0.02 mg/mL时效果最佳;当枸杞多糖和黄芪多糖在pH6的条件下,二者抑菌活性均最强。结论:枸杞多糖和黄芪多糖对细菌、霉菌都有一定的抑制效果,pH值可影响枸杞多糖和黄芪多糖的抑菌效果。  相似文献   

18.
Bacillus pumilus strain Sh18 cell wall polysaccharide (CWP), cross-reactive with the capsular polysaccharide of Haemophilus influenzae type b, was purified and its chemical structure was elucidated using fast atom bombardment mass spectrometry, nuclear magnetic resonance techniques, and sugar-specific degradation procedures. Two major structures, 1,5-poly(ribitol phosphate) and 1,3-poly(glycerol phosphate), with the latter partially substituted by 2-acetamido-2-deoxy-alpha-galactopyranose (13%) and 2-acetamido-2-deoxy-alpha-glucopyranose (6%) on position O-2, were found. A minor component was established to be a polymer of -->3-O-(2-acetamido-2-deoxy-beta-glucopyranosyl)-1-->4-ribitol-1-OPO3-->. The ratios of the three components were 56, 34, and 10 mol%, respectively. The Sh18 CWP was covalently bound to carrier proteins, and the immunogenicity of the resulting conjugates was evaluated in mice. Two methods of conjugation were compared: (i) binding of 1-cyano-4-dimethylaminopyridinium tetrafluoroborate-activated hydroxyl groups of the CWP to adipic acid dihydrazide (ADH)-derivatized protein, and (ii) binding of the carbodiimide-activated terminal phosphate group of the CWP to ADH-derivatized protein. The conjugate-induced antibodies reacted in an enzyme-linked immunosorbent assay with the homologous polysaccharide and with a number of other bacterial polysaccharides containing ribitol and glycerol phosphates, including H. influenzae types a and b and strains of Staphylococcus aureus and Staphylococcus epidermidis.  相似文献   

19.
探究稻曲病菌Ustiloginoidea virens (Cooke) Takahashi厚垣孢子壁多糖的最佳提取方法,为孢壁多糖含量和组成的研究提供基础.采用5种方法提取该病菌黑色厚垣孢子壁多糖,用苯酚-硫酸法测定多糖含量.经研究比较,最佳提取方法为复合酶-热水浸提-sevag法,最佳提取条件是复合酶量4%,pH 4,浸提温度70℃,浸提时间120 min,物料比1:75(V/V);在优选的方法和条件下,测定稻曲病菌黑色厚垣孢子壁粗多糖相对得率21.2%,多糖含量72 3%;黄色厚垣孢子壁粗多糖相对得率17.5%,多糖含量66.7%,前者明显高于后者.研究表明复合酶-热水浸提-sevag法的工艺简单、可行,适宜稻曲病菌厚垣孢子壁多糖的测定.  相似文献   

20.
A soluble polysaccharide antigen from the cell wall of Rothia dentocariosa ATCC 17931 has been isolated, purified and characterized by serological and chemical procedures. The polysaccharide (RPS) was found to be located at the surface of cells grown under diverse environmental conditions, and could be easily detected on cells in pure culture or in clinical samples from humans and experimentally infected hamsters by fluorescent-antibody techniques. Fructose, glucose, galactose, and ribose were the major constituents of RPS. Although purified RPS was not immunogenic in rabbits, it was presumed to be a major antigen of the cell because it could specifically absorb approximately one-third of the antibody nitrogen in antisera prepared against whole cells of R. dentocariosa. Haptene inhibition studies indicated that fructose was the principal determinant of serological specificity in RPS. This polysaccharide was found to be serologically unique and did not cross-react with the polysaccharides and surface polymers of other oral actinomycetes and filamentous organisms.  相似文献   

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