茶树花多糖的提取、纯化、结构鉴定及生物活性的研究
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
茶树花富含营养成分和活性物质,是一类具重要的潜在资源。本文在系统研究茶叶多糖分离纯化、理化性质和一级结构的基础上,利用生物大分子研究的近代最新技术和现代分离、分析手段与药理实验方法,表征茶树花多糖的溶液行为和三维链构象,尝试揭示多糖的高级结构与其重要生物活性的关系。
     茶树花多糖的提取主要包括茶树花多糖提取条件的优化和茶树花多糖脱蛋白,脱色等方法的选择。采用单因素实验和Box-Behnken中心组合设计实验,确定了热水提取茶树花多糖最佳提取条件:21.75倍量水,90。C提取1.89h。通过综合考量Sevag法、三氯乙酸法、盐酸法和氯化钙法的脱蛋白率和多糖保留量,确定了以Sevag法作为茶树花多糖脱蛋白的方法。实验还比较了活性炭吸附法,H2O2氧化法和溶剂洗涤法的脱色效果,活性炭吸附法能够得到较高的脱色率和多糖保留量。经Sephadex G-100凝胶柱层析分离得到多糖组分TFP-1和TFP-2,冷冻干燥后为灰白色粉末,多糖含量为83.6%和87.9%,蛋白含量为1.5%和2.9%,糖醛酸含量为2.7%和7.1%。
     高效液相凝胶色谱法分析茶树花多糖组分TFP-1和TFP-2,得到TFP-1的分子量为167.5kDa,单糖组成葡萄糖:木糖:鼠李糖:半乳糖=1.0:1.2:0.81:0.98。TFP-2分子量为10.1kDa,单糖组成葡萄糖:木糖:鼠李糖:阿拉伯糖=1.0:0.76:2.3:2.3。多糖的初步分析显示,TFP-1和TFP-2是水溶性、非淀粉、非酚类物质,不含还原糖和核酸、含有蛋白质的多糖。β-消去反应表明TFP-1和TFP-2中糖链与蛋白质之间通过0-糖肽键相连。通过红外光谱分析得出TFP-1和TFP-2具有典型的糖类化合物的光谱特征,TFP-1同时含有α-吡喃环以及β-吡喃环的特征吸收峰,而TFP-2只含有α-吡喃环的特征吸收峰。1H NMR中的化学位移显示TFP-1含有α-D-Galp、α-D-GalpNAc、α-D-Xylp、α-D-Glcp和β-D-Glcp残基,而TFP-2含有α-L-Arap、α-D-Glcp、α-D-Xylp和α-D-GlcpNAc残基。
     原子力显微镜(AFM)的图像显示,茶树花多糖链分子间互相缠绕,在浓度为5μg/mL下TFP-1和TFP-2直径为250nm和150nm,在浓度为20μg/mL时直径增加为500nm和200nm。茶树花粗多糖TFP及组分TFP-1和TFP-2在水溶液中表现为剪切变稀,在相同的剪切速率下,茶树花多糖溶液粘度TFP>TFP-1>TFP-2。通过激光光散射、粘度测定和刚果红反应等方法确定了茶树花多糖在0.1MNaCl水溶液中呈现球状构象,且分枝较多。pH值、温度、离子强度等环境因素的改变均影响其立体构象。扫描电镜SEM观察和X-射线衍射分析表明TFP-1和TFP-2为无定形结构,提示多糖的空间结构和溶液行为将明显影响多糖的生物活性。
     系统的研究了茶树花多糖的体外和体外抗氧化活性。通过比较茶树花粗多糖TFP及组分TFP-1和TFP-2对羟基自由基,超氧阴离子自由基以及DPPH自由基的清除活性,得出抗氧化活性TFP-2>TFP-1>TFP,这可能与组成多糖的成分及水溶性和粘度有关。灌胃茶树花多糖(75、150和300mg/kg) 28d后可抑制溴化苯诱导的小鼠肝脏脂质过氧化,能显著提高小鼠SOD活性和T-AOC水平,并且抑制MDA含量的升高。
     灌胃茶树花多糖(75、150和300mg/kg)14d后能显著增加正常小鼠巨噬细胞的吞噬活性,对二硝基甲苯诱导的小鼠迟发型超敏反应也有显著的增强。对S180肉瘤小鼠的研究发现,灌胃TFP(75、150和300mg/kg) 7d后能显著改善荷瘤小鼠生活状况,显著增加荷瘤小鼠生存时间和存活率,抑瘤率分别为45.5%,60.9%和64.5%。能显著增加荷瘤小鼠血清中IFN-γ和IL-2含量的影响,并且能增加T细胞亚群CD4+的数量及改善CD4+/CD8-的失调,提示摄入茶树花多糖可明显增强免疫活性。
     茶树花多糖对四氧嘧啶引起的小鼠实验性糖尿病有明显的防治作用。灌胃茶树花多糖(75、150和300mg/kg)21d后,能明显改善糖尿病小鼠的“三多一少”状况,显著降低四氧嘧啶诱导的糖尿病小鼠的血糖(p<0.01)。茶树花多糖在体外可以抑制α-淀粉酶和α-葡萄糖苷酶活性,在0.2-2.0mg/mL浓度范围内呈量效关系。
Tea (Camellia sinensis) flower is rich in nutritional components and active substances, from this point, tea flower as a kind of potential resources which has important application values. The physicochemical properties and the chemical structure of tea flower polysaccharide (TFP) and its fractions (TFP-1 and TFP-2) were studied in this doctoral dissertation. The solution behavior and three-dimensional conformation of TFP were also investigated here, with the advanced methods of isolation and purification technique, chemical and instrument analysis technique of biomacromolecular. The correlation between bioactivities and the conformation of polysaccharides was discussed.
     Response surface methodology was applied to optimize the hot-water extraction parameters for TFP with a Box-Behnken design. The optimal conditions to obtain the highest yield of TFP were temperature,90℃; time,1.89 h and liquid-solid ratio,21.75. The protein of TFP are removed by using one of the four following methods (sevag reagent, trichloroacetic acid, HC1 or CaCl2), respectively. Considering the deproteinization rate and inventory of polysaccharide, sevag method was chosen for the deproteinization. The decoloration by active carbon, organic solvent and H2O2 were also studied, the results showed that active carbon was more effective in this case. TFP-1 and TFP-2, which were two homogeneous polysaccharide fractions, were separated from TFP by Sephadex G-100 column chromatography. After freeze-dried, it was found that TFP-1 and TFP-2 were grayish powder and the contents of uronic acid, protein and sugar were 2.7 and 7.1%; 1.5 and 2.9%; 83.6 and 87.9%, respectively.
     The high performance gel filtration chromatography analysis showed that TFP-1 was composed of Glc:Xyl:Rha:Gal=1.0:1.2:0,81:0.98 with a molecular weight of 167.5 kDa, while TFP-2 comprised Glc:Xyl:Rha:Ara=1.0:0.76:2.3:2.3 with a molecular weight of 10.1 kDa. TFP-1 and TFP-2 were water soluble and have trace protein conjugate with polysaccharide. In addition, no starch, phenol, reducing sugar and nucleic acid has been found in them. The results ofβ-elimination reaction indicated that the chain of polysaccharides and protein was connected by 0-linked chemical bond. The IR analysis showed that TFP-1 containedαandβtype glycosidic linkages, while onlyαtype glycosidic linkage in TFP-2. The'H NMR revealed that TFP-1 containedα-L-Rhap,α-D-Galp, a-D-GalpNAc,α-D-Xylp,α-D-Glcp andβ-D-Glcp residues, while. TFP-2 was illustrated to haveα-L-Rhap,α-L-Arap,α-D-Xylp,α-D-Glcp andα-D-GlcpNAc residues.
     By using technique of atomic force microscope, we found that with the concentrations of 5 and 20μg/mL, the diameters of spherical lumps of TFP-1 and TFP-2 were about 250 nm and 150 nm,500 nm and 200 nm, respectively. The polysaccharide solution showed significant shear thinning behavior, and under a same shear rate, the viscosity showed TFP>TFP-1> TFP-2; The three dimensional conformation and solution behavior were studied by using the technique of laser light scattering and viscometer, the results confirmed that TFP-1 and TFP-2 existed almost as a branched spherical shape in 0.1 M NaCl aqueous. The conformation could be changed by the factors of pH, temperature, ion intensity etc. The results of SEM and X-ray indicated that the state structure of tea flower polysaccharides was noncrystal.
     The antioxidant effects of TFP and its fractions against DPPH radical, superoxide radical and hydroxyl radical were investigated in vitro assay systems compared with ascorbic acid, the antioxidant activity showed TFP-2>TFP-1>TFP, which was attributed to its relatively low molecular weight, low apparent viscosity and particularity of chemical composition. Administration of TFP (75,150 and 300 mg/kg) for 28 d continuously was found not only to be protective on liver lipid peroxidation induced by bromobenzene in mice through increasing the activity of superoxidase dismutase, total antioxidant capacity, but also markedly to attenuate the enhancement of malondialdehyde content in a dose dependent manner.
     After administration of TFP (75,150 and 300 mg/kg) for 14 d, there were a enhancement for macrophage phagocytic activity and delayed type hypersensitivity response induced by dinitrofluorobenzene in normal mice. Using S180 tumor bearing mice as model, research showed that continuous administration of TFP (75,150 and 300 mg/kg) for 7 d was found to inhibited the growth of transplanted S180 and prolonged the mice survival days, promoted the plasma interleukin-2, interferon-γlevels and improved the T-lymphocyte subsets CD4+ and CD4+/CD8+ ratio.
     Furthermore, TFP-2 was presented dose dependent inhibitory effects against a-glucosidase andα-amylase in vitro assay systems. Moreover, continuous administration of TFP-2 (75,150 and 300 mg/kg) for 21 d improved the life quality of alloxan-induced diabetic mice, and also caused a significant (p<0.01) decrease in blood glucose levels.
引文
Adolphi U, Kulicke WM.1997. Coil dimensions and conformation of macromolecules in aqueous media from flow field-flow fractionation/multi-angle laser light scattering illustrated by studies on pullulan. Polymer,38,1513-1519
    Andrew MT, Murray WT, Susan MD et al. Hospital admissions in diabetic and non-diabetic patients: A case-control study. Diabetes Research and Clinical Practice,2006,73:260-267
    Bagasra 0, Lisehner HW.1988. Activity of dextran sulfate and other polyanionic polysaeeharides against human immunodeficiency virus. Journal of Infectious Diseases,158 (5):1084-1087
    Barker SA, Bourne EJ, Stacey M et al.1954. Infrared spectra of carbohydrates. Part Ⅰ. Some derivatives of d-glucopyranose. Journal of the Chemical Society of Pakistan,171-176
    Batistuti JP, Barros RMC, Areas JAG.1991. Optimization of extrusion cooking process for chickpea (Cicer arietinum, L.) defatted flour by response surface methodology. Journal of Food Science,56:1695-1698
    Bitter T, Muir HM.1962. A modified uronic acid carbazole reaction. Analytical Biochemistry, 4:330-334
    Blackstock R.2003. Roles for CD40, B7 and major histocompatibility complex in induction of enhanced immunity by cryptococcal polysaccharide-pulsed antigen-presenting cells. Immunology,108 (2):158-166
    Box GEP, Wilson KB.1951. On the experimental attainment of optimum conditions. Journal of the Royal Statistical Society,13:1-45
    Box GEP, Behnken DW.1960. Some new three level designs for the study of quantitative variables. Technometrics,2:455-475
    Burchard W, Schmidt M, Stockmayer WH.1980. Information on polydispersity and branching from combined quasi-elastic and intergrated scattering. Macromolecules,13,1265-1272
    Bwititi P, Musabayane CT, Nhachi CFB.2000. Effects of Opuntia megacantha on blood glucose and kidney function in streptozotocin diabetic rats. Journal of Ethnopharmacology,69, 247-252
    Carlucci MJ, Pujol CA, Cianda M et al.1997. Antiherpetic and anticoagulant properties of carrageenans from the red seaweed Gigartina skottsbergii and their cyclized derivatives: correlation between structure and biological activity. International Journal of Biological Macromolecules,20 (2):97-105
    Chandrasekaran EV, BeMiller JN, Song-Chiau DL.1978. Isolation, partial characterization, and biological properties of polysaccharides from crude papain. Carbohydrate Research,60 (1):105-115
    Chattopadhyay N, Ghosh T, Sinha S et al.2010. Polysaccharides from Turbinaria conoides:Structural features and antioxidant capacity. Food Chemistry,118,823-829
    Chapdelaine P, Tremblay RR, Dube JY.1978. P-nitrophenol-α-glucopyramoside as substract for measurement of maltase activityin human semen. Clinical Chemistry,24:208-211
    Chattopadhyay K, Ghosh T, Pujol CA et al.2008. Polysaccharides from Gracilaria corticata: Sulfation, chemical characterization and anti-HSV activities. International Journal of Biological Macromolecules,43 (4):346-351
    Chen HX, Zhang M, Qu ZS et al.2008. Antioxidant activities of different fractions of polysaccharide conjugates from green tea (Camellia Sinensis). Food Chemistry,106:559-563
    Chen HX, Qu ZS, Fu LL et al.2009. Physicochemical properties and antioxidant capacity of 3 polysaccharides from green tea, Oolong tea and black Tea. Journal of Food Science,74: 469-474
    Chen RZ, Meng FL, Liu ZQ et al.2009. Antitumor activities of different fractions of polysaccharide purified from Ornithogalum caudatum Ait. Carbohydrate Polymers,80 (3):845-851
    Del Toro-Arreola S, Flores-Torales E, Torres-Lozano C et al.2005. Effect of D-limonene on immune response in BALB/c mice with lymphoma. International Immunopharmacology,5 (5):829-838
    Ding X, Feng S, Cao M et al.2010. Structure characterization of polysaccharide isolated from the fruiting bodies of Tricholoma matsutake. Carbohydrate Polymers,81:942-947
    Ducel V, Saulnier P, Richard J et al.2004. Plant protein-polysaccharide interactions in solutions:application of soft particle analysis and light scattering measurements. Colloids and Surfaces B:Biointerfaces,41:95-102
    Edge CJ, Rademacher TW, wormald MR et al.1992. Fast sequencing of oligosacchrides:the reagent-array analysis method. Proceedings of the National Academy of Sciences,89 (4):6338-6342
    Feng T, Gu ZB, Jin ZY et al.2008. Isolation and characterization of an acidic polysaccharide from Mesona Blumes gum. Carbohydrate Polymers,71:159-169
    Fenn JB, Mann M, Meng CK et al.1989. Electrospray ionisation for mass spectrometry of large biomolecules. Science,246:64-71
    Ferreira SLC, Bruns RE, Ferreira HS et al.2007. Box-Behnken design:An alternative for the optimization of analytical methods.Analytica Chimica Acta,597:179-186
    Franz G.1989. Polysaecharides in pharmaey:eurrent applieations and future coneept. Planta Madica,55:493-497
    Fuwa H.1954. A new method of micro-determination of amylase activity. Journal of Biochemistry, 41:583-603
    Gabriela G, Walther B.1995. Macromolecules Starch fractions as examples for nonrandomly branched macromolecules.1. Dimensional properties,289:2362-2370
    GerberP, Dutcher D, Adams V et al.1958. Protective effect of seaweed extracts for chicken embryos infected with influenza B or mumps. Proceedings of the Society for Experimental Biology and Medicine,99:590-593
    Goh KKT, Merino LM, Pinder DN et al.2011. Molecular characteristics of a novel water-soluble polysaccharide from the New Zealand black tree fern (Cyathea medullaris). Food Hydrocolloids,25:286-292
    Gunning AP, Giardina TP, Faulds CB et al.2003. Surfactant mediated solubilisation of amylase and visualization by atomic force microscopy. Carbohydrate Polymers,51:177-182
    Hammond BF.1971. Intracellular polysaccharide production by human oral strains of Lactobacillus casei. Archives of Oral Biology,16 (3):323-338
    Harman D.1956. Aging:a theory based on free radical and raliation chemistry. Journals of gerontology,11:298-300
    Hamuro J, Chihara G.1971. Mechanisms of action of antitumor polysaccharide I Effects of antilymphocyte serum on the antitumor activity of lentinan. International Journal of Cancer,8 (1):41-46
    Hollman PCH, Hertog MGL, Katan MB.1996. Analysis and health effects of flavonoids. Food Chemistry, 9 (57):43-46
    Huang Q, Zhang L.2005. Solution properties of (1→3) -α-D-glucan and its sulfated derivative from Poria cocos mycelia via fermentation tank. Biopolymers,79:28-38
    Hou X, Chen W.2008. Optimization of extraction process of crude polysaccharides from wild edible BaChu mushroom by response surface methodology. Carbohydrate Polymers,72:67-74
    Ibanoglu S, Ainsworth P.2004. Effect of canning on the starch gelatinization and protein in vitro digestibility of tarhana, a wheat flour-based mixture. Journal of Food Process Engineering,64:243-247
    Isnard N, Fodil-Bourahla I, Robert AM et al.2004. Pharmacology of skin aging. Stimulation of glycosaminoglycan biosynthesis by L-fucose and fucose rich polysaccharides, effect of in vitro aging of fibroblasts. Biomedicine & pharmacotherapy,58 (3):202-204
    James N. Bemiller.1996. Structure-property relationships of water-soluble polysaecharides. Journal of Applied Glycoscience,43 (3):377-384
    Kacurakova M, Capek P, Sasinkova V et al.2000. FT-IR study of plant cell wall model compounds: Pectic polysaccharides and hemicelluloses. Carbohydrate Polymers,43:195-203
    Kajiwara K, Burchard W.1984. Rotational isomeric state calculations of the dynamic structure factor and related properties of some linear chains.1. The ρ=[S2]1/2[RH-1] parameter. Macromolecules,17:2669-2673
    Karagozler AA, Erdag B, Emek YC et al.2008. Antioxidant activity and proline content of leaf extracts from Dorystoechas hastate. Food Chemistry,111:400-407
    Karmakar P, Pujol CA, Damonte EB et al.2010. Polysaccharides from Padina tetrastromatica: Structural features, chemical modification and antiviral activity. Carbohydrate Polymers,80 (2):513-520
    Khan N, Mukhtar H.2007. Tea polyphenols for health Promotion. Life Science,81:519-533
    Khan N, Mukhtar H.2008. Multitargeted therapy of cancer by green tea polyphenols. Cancer Letters, 269:269-280
    Kirby AR, Gunning AP, Morris VJ.1995. Imaging xanthan gum by atomic force microscopy. Carbohyd Research,267:161-166
    Kobayashi T, Takiguchi Y, Yazawa Y.2002. Structural analysis of an extracellular polysaccharide bioflocculant of Klebsiella pneumoniae. Bioscience Biotechnology and Biochemistry,66 (7):1524-1530
    Konishi T, Yoshizaki T, Yamakawa H.1991. On the "Universal Constants" ρ and Φ. of flexible polymers. Maeromolecule,24:5614-5622
    Kurata S, Yamada K, Takatsu K et al.2003. Extracellular acidicpolysaccharide production by a two-membered bacterial coculture. Bioscience Biotechnology Biochemistry,67 (1):8-14
    Lambert JD, Yang CS.2003. Cancer chemopreventive activity and bioavailability of tea and tea polyphenols. Mutation Research,523-524:201-208
    Li DT, Her GR.1998. Structural analysis of chromophorelabeled disaceharides and digosaecharides by eleetrospray inonization mass speetrometry and hight performance liquid chromatography/electrospray inonization mass spectrometry. Mass Speetrometry,33: 644-652
    Li SP, Zhang GH, Zeng Q et al.2006. Hypoglycemic activity of polysaccharide, with antioxidation, isolated from cultured Cordyceps mycelia. Phytomedicine,13:428-433
    Lissom P, Bami S, Rovelli F et al.1990. The biological significance of soluble interleukin-2 receptors in solid tumors. European Journal of Cancer,26 (1):33-36
    Liu CH, Xi T, Lin QX et al.2008. Immunomodulatory activity of polysaccharides isolated from Strongylocentrotus nudus eggs. International Immunopharmacology,8:1835-1841
    Loeliger AE, Rijkers GT, Aerts P et al.1995. Deficient antipneumococcal polysaccharide responses in HIV-seropositive patients. FEMS Immunology and Medical Microbiology,12:33-41
    Luo AX, He XJ, Zhou SD et al.2010. Purification, composition analysis and antioxidant activity of the polysaccharides from Dendrobium nobile Lindl. Carbohydrate Polymers,79:1014-1019
    Ma Z, Wang J, Zhang L.2008. Structure and chain conformation of β-glucan isolated from Auricularia auricula-judae. Biopolymers,89:614-622
    Manrique GD, Lajolo FM.2002. FT-IR spectroscopy as a tool for measuring degree of methyl esterification in pectins isolated from ripening papaya fruit. Postharvest Biology and Technology,25:99-107
    Marklund S, Marklund G.1974. Involvement of superoxide anion radical in the auto-oxidation of pyrogallol and a convenient assay of superoxide dismutase. Journal of Biochemistry, 47:469-474
    Masmoudi M, Besbes S, Chaabouni M et al.2008. Optimization of pectin extraction from lemon by-product with acidified date juice using response surface methodology. Carbohydrate Polymers,74:185-192
    Massimo M, Ettore B, Laura F et al. Cardio-cerebrovascular complications in elderly with diabetes. Archives of Gerontology and Geriatrics,2007,44:261-269
    Matin FR, Frutos MJ, PerezAlvarez JA et al.2002. Flavonoids as nutraeeuticals:Structural related antioxidant properties and their role on ascorbic acid preservation. Studies in Natural Products Chemistry,26:741-778
    Michela F, Meredith H, Paola C et al.2009. Conformational studies of the capsular polysaccharide produced by Neisseria meningitidis group A. Carbohyd Research,344:940-943
    Misaki A, Kakuta M.1981. Studies on interrelation of structure and antitumor effects of polysaccharides:antitumor action of periodate-modified, branched (1→3)-β-D-glucan of Auricularia auricula-judae, and other polysaccharides containing (1→3)-glycosidic linkages. Carbohydrate Research,92 (1):115-129
    Moon YJ, Wang X, Morris ME.2006. Dietary flavonoids:Effects on xenobiotic and carcinogen metabolism. Toxicology in Vitro,20:187-210
    Morris DL.1948. Quantitative determination of carbohydrate with Dreywood's anthrone reagent. Science,107:254-255
    Morri VJ, Gunning AP, Kirby AR et al.1997. Atomic force microscopy of plant cell walls, plant cell wall polysaccharides and gels. International Journal of Biological Macromolecules, 21:61-66
    Needs PW, Selvendra RR.1993. Avoiding oxidative degradation during sodium hydroxide/methyl iodide-mediated carbohydrate methylation in dimethyl sulfoxide. Carbohydrate Research, 245 (1):1-10
    Neukam K, Pastor N, Cortes F.2008. Tea flavanols inhibit cell growth and DNA topoisomerase Ⅱ activity and induce endoreduplication in cultured Chinese hamster cells. Mutation Research,654:8-12
    Niu A, Liaw DJ, Sang HC et al.2000. Light-scattering study of a zwitterionic polycarboxybetaine in aqueous solution, Macromolecules,33:3492-3494
    Ogawa K, Wanatabe T, Tsurugi J et al.1972. Conformational behavior of agel-forming (1→3)-β-glucan in alkaline solution. Carbohydrate Research,23,399-405.
    Ohno N, Suzuke I, Oikawa S et al.1984. Antitumor activity and structural characterization of Glucans extracted from cultured fruit bodies of Grifola frondosa. Chemical and Pharmaceutical Bulletin,32 (3):1142-1151
    Ourdia B, David N, Marjolaine R et al.2005. Fungal enzymes as a powerful tool to release simple phenolic compounds from olive oil by-products. Process Biochemistry,40:1855-1862
    Park JK, Lee SO, Cui WS et al.2005. Activity of Angiotensin Peptides in Clitoral Cavernosum of Alloxan Induced Diabetic Rabbit. European Urology,48 (6):1042-1050
    Peng YF, Zhang LN, Zeng FB et al.2003. Structure and antitumor activity of extracellular polysaccharides from mycelium. Carbohydrate Polymers,54 (30:297-303
    Petemon J, Dwyer J, Bhagwat S et al.2005. Major flavonoids in dry tea. Journal of Food Composition and Analysis,18:487-501
    Pezron I, Djabourov M, Leblond J.1991. Conformation of gelatin chains in aqueous solutions: 1. A light and small-angle neutron scattering study. Polymer,32,3201
    Piazza L, Bertini S, Milany J.2010. Extraction and structural characterization of the polysaccharide fraction of Launaea acanthodes gum. Carbohydrate Polymers,79:449-454
    Pierce J, Suelter CH.1977. An evaluation of the Coomassie brilliant blue G-250 dye-binding method for quantitative protein determination. Analytical Biochemistry,81:478-480
    Qiao DL, Liu J, Ke CL et al.2010. Structural characterization of polysaccharides from Hyriopsis cumingii. Carbohydrate Polymers,82:1184-1190
    Salkovic-Petrisic M, Lackovic Z, Hoyer S et al.2005. Central administration of alloxan impairs glucose tolerance in rats. Journal of Neural Transmission,112 (10):1391-1395
    Santhiya D, Subramanian S, Natarajan KA.2002. Surface chemical studies on sphalerite and galena using extra cellular polysaccharide isolated from Bacillus polymyxa. Journal of Colloid and Interface Science,256:237-248
    Sato T, Norisuye T, Fujita H.1983. Triple Helix of Schizophyllum commune Polysaccharide in Dilute Solution.5. Light Scattering and Refractometry in Mixtures of Wrater and Dimethyl Sulfoxide. Macromolecules,16:185-189
    Sevag MG, Lackman BD, Smolens J.1938. The isolation of the components of streptococcal nucleoproteins in serologically active form. Journal of Biological Chemistry,124: 425-436
    Shailaja G, Mahajan, Anita A et al.2010. Immunosuppressive activity of ethanolic extract of seeds of Moringa oleifera Lam. in experimental immune inflammation. Journal of Ethnopharmacology,130:183-186
    Shen X, Perreaul T.1999. Eleetrospray inonization mass spectrometry of 1-phenyl-3-methyl-5-pyrazolone derivatives of neutml and N-aeety-lated oligosaeeharides. Mass Spectrom, 34:502-510
    Sheng JC, Yu F, Xin ZH et al.2007. Preparation, identification and their antitumor activities in vitro of polysaccharides from Chlorella pyrenoidosa. Food Chemistry,105 (2):533-539
    Shieh CJ, Koehler PE, Akoh CC.1996. Optimization of sucrose polyester synthesis using response surface methodology. Journal of Food Science,61:97-100
    Sirk T, Brown E.2008. Modeling of biological membranes in the study of tea flavonoids. Chemistry and Physics of Lipids,154:21-31
    Singh UV, Udupa N.1997. In vitro characterization of methotrexate loaded poly (lactic-co-glycolic) acid microspheres and antitumor efficacy in Sarcoma-180 mice bearing tumor. Pharmaceutics Acta Helvetiae,72:165-173
    Smirnoff N, Cumbes QJ.1989. Hydroxyl radical scavenging activity of compatible solutes. Phytochemistry,28:1057-1060
    Snijman PW, Swanevelder S, Joubert E et al.2007. The antimutagenic activity of the major flavonoids of rooibos (Aspalathus linearis):Some dose-response effects on mutagen activation-flavonoid interactions. Mutation Research,631:111-123
    Srivastava R, Kulshreshtha DK.1989. Bioaetive Polysaeeharides from plants. Phytoehemistry, 28 (11):2877-2883
    Sun LQ, Wang CH, Shi QJ et al.2009. Preparation of different molecular weight polysaccharides from Porphyridium cruentum and their antioxidant activities. International Journal of Biological Macromolecules,45 (1):42-47
    Sun R, Lawther JM, Banks WB.1996. Fractional and structural characterization of wheat straw hemicelluloses. Carbohydrate Polymers,29:325-331
    Sun HH, Ma WJ, Chen Y et al.2009. Isolation, chemical characteristics and antioxidant properties of the polysaccharides from marine fungus Penicillium sp. F23-2. Carbohydrate Polymers, 78:117-124
    Sun ZW, Zhang LX, Zhang B et al.2010. Structural characterisation and antioxidant properties of polysaccharides from the fruiting bodies of Russula virescens. Food Chemistry,118 (3):675-680
    Surenjav U, Zhang LN, Xu XJ et al.2006. Effects of molecular structure on antitumor activities of (1→3)-β-D-glucans from different Lentinus Edodes. Carbohydrate Polymers,63 (1): 97-104
    Tian XX, Li A, Farrugia Ⅳ et al.2000. Isolation and identification of poly-alpha-(1→4) -linked 3-0-methyl-D-mannopyranose from a hot-water extract of mycobaeterium vaccae. Carbohydrate Research,324:38-44
    Toklu HZ, Sener G, Jahovie N et al.2006. Beta-gluean protects against burn-induced oxidative organ damage in rats. International Immunopharmacology,6 (2):156
    Tong HB, Xia FG, Feng K et al.2009. Structural characterization and in vitro antitumor activity of a novel polysaccharide isolated from the fruiting bodies of Pleurotus ostreatus Bioresource Technology,100 (4):1682-1686
    Torel J, Cillard J, Cillard P.1986. Antioxidant activity of flavonoids and reactivity with peroxyradical. Phytochemistry,25 (2):383-385
    Turner MA. Screening Methods in Pharmacology. New York, Academic Press,1965
    Varnalis AI, Brennan JG, MacDougall DB et al.2004. Optimisation of high temperature puffing potato cubes using response surface methodology. Journal of Food Process Engineering,61:153-163
    Wang Q, Huang XQ, Nakamura K et al.2005. Molecular characterisation of soybean polysaccharides: an approach by size exclusion chromatography, dynamic and static light scattering methods. Carbohydrate Research,340:2637-2644
    Warren RE.2004. The stepwise approach to the management of type 2 diabetes. Diabetes Research and Clinical Practice,65:53-58
    Wei XL, Chert MA, Xiao JB et al.2010. Composition and bioactivity of tea flower polysaccharides obtained by different methods. Carbohydrate Polymers,79 (2):418-422
    Willemsen OH, Snel MM, Cambi A et al.2000. Biomolecular interactions measured by atomic force microscopy. Biophysics Journal,79:3267-3281
    Witvrouw M, Desmyter J, De Clercq.1994. Antiviral portrait series:4. Polysulfates as inhibitors of HIV and other enveloped viruses. Antiviral Chemistry & Chemotherapy,5 (6):345-349
    Wuorimaa T, Kayhty H, Eskola J et al.2001. Activation of cell-mediated immunity following immunization with pneumococcal conjugate or polysaccharide vaccine. Scandinavian Journal of Immunology,2001,53 (4):422-428
    Xu HS, Wu YW, Xu SF et al.2009. Antitumor and immunomodulatory activity of polysaccharides from the roots of Actinidia eriantha. Journal of Ethnopharmacology,125:310-317
    Yamashita K, Ohkura T, Okada S et al.1981. Urinary oligosaccharides of gm-gangliosidosis different excretion paterm of oligosaccharides in the urine of typel and type2 subgroups. Journal of Biological Chemistry,256 (10):4789-4798
    Yu MS, Wong AY, So KF, et al.2007. New polysaccharide from Nerium in dicum protects neurons via stress kinase signaling pathway. Brain Research,1153:221-230
    Yuan JF, Zhang ZQ, Fan ZC et al.2008. Antioxidant effects and cytotoxicity of three purified polysaccharides from Ligusticum chuanxiong Hort. Carbohydrate Polymers,74:822-827
    Zha XQ, Wang JH, Yang XF et al.2009. Antioxidant properties of polysaccharide fractions with different molecular mass extracted with hot-water from rice bran. Carbohydrate Polymers, 78:570-575
    Zhang LN, Zhang M, Chen JH et al.2001. Solution properties of antitumor sulfated derivative of α-(1→3)-D-glucan from Ganoderma lucidum. Chinese Journal of Polymer Science, 19 (3):283-289
    Zhang L, Li X, Xu X et al.2005. Correlation between antiturnor activity, molecular weight, and conforrnation of lentinan. Carbohydrate Research,340:1515-1521
    Zhang J, Wu J, Liang JY et al.2007. Chemical characterization of Artemisia seed polysaccharide. Carbohydrate Polymers,67:213-218
    Zhao LY, Dong YH, Chen GT et al.2009. Extraction, purification, characterization and antitumor activity of polysaccharides from Ganoderma lucidum. Carbohydrate Polymers,80(3):783-789
    Zhu BT, Tanejia N, Loder DP, et al.1998. Effect of tea polyphenols and flavonoids on liver microsomal glucuronidation of estradiol and estrone. The Journal of Steroid Biochemistry and Molecular Biology,64 (3-4):207-215
    曹炜,姚亚平.用荧光探针法研究茶叶花粉黄酮对氧自由基致鼠红细胞膜氧化损伤的保护作用.光子学报,2002,31(4):394-397
    陈蕾.身价百亿茶树花.中国投资,2006,(2):105-107
    陈克复.食品流变学及其测量.北京:轻工业出版社,1999:78-89
    蔡孟深,李中军.糖化学.北京:化学工业出版杜,2007,401
    傅继华,温涛,徐琛.芦荟多糖对动物实验性胃溃疡的影响.中草药,2006,37(6):894-897
    方积年.多糖研究现状.药学学报,1986a,21(12):944-948
    方积年.多糖的甲基化分析方法.国外医学(药学分册),1986b,4:222-225
    顾亚萍,钱和.茶树花香气成分研究及其香精的制备.食品研究与开发,2008,29(1):187-190
    谷铣之,殷蔚伯,刘泰福等.肿瘤放射治疗学.北京:北京医科大学中国协和医科大学联合出版社,1993,737-738
    顾亚萍.茶树花的综合利用-茶树花中多糖和香气成分的提取与分析.无锡:江南大学,2008
    黄阿根,董瑞建,葛庆丰.超滤用于茶树花多酚纯化工艺的研究.食品与发酵工业,2007,33(8):158-162
    华允华.铁皮石斛多糖成分研究.杭州:浙江大学,2005
    黄芳,蒙义文.活性多糖的研究进展.天然产物研究与开发,2000,11(5):90-98
    黄琳娟,林颖,田庚元等.枸杞子中免疫活性成分的分离,纯化及物理化学性质的研究.药学学报,1998,33(7):512-516
    姜世权,叶飞,苏士杰等.黄蘑多糖的辐射防护作用及其机理的初步探讨.中国辐射卫生,2001,10(2):67-68
    刘长福,刘涛,刘秀梅.高效液相色谱法测定香菇多糖的分子量.化学工程,2005,118(7):28-29
    刘如林,杨春.小核菌多糖分子形貌的电镜研究.南开人学学报,1995,28(1):68-71
    李晓诗,孙亚荣,丰立忠等.癌性渗出液中IL-2、IL-6、IL-8、TNF-α和IFN-γ活性分析.中国肿瘤临床与康复,1999,6(2):22
    梁名志,浦绍柳,孙荣琴.茶花综合利用初探.中国茶叶,2002,24(5):16-17
    鲁子贤,崔涛,施庆洛等.圆二色性和旋光色散在分子生物学中的应用.北京:科学出版社,1987
    刘福英,王秀芳,冯旭.可移植性肿瘤动物模型的复制应用及问题.2000,16(9):482-485
    凌笑梅,张娅婕.鳖甲粗多糖预防辐射损伤效应的初步研究.辐射研究与辐射工艺学报,1996,14(3):190-192
    苗明三,苗艳艳,孙艳红.大枣多糖对血虚大鼠全血细胞及红细胞ATP酶活力的影响.中国临床康复,2006,10(11):97-99
    宁波.肿瘤免疫逃避机制的研究进展明.实用癌症杂志,2003,18(4):444-446
    欧阳平凯.生物分离原理及技术.北京:化学工业出版社,1999,282-294
    沈萍萍.真菌多糖研究进展.南京大学学报,1991,27(3):524-529
    唐礼可.山楂多糖抗疲劳作用实验研究.云南中医中药杂志,2008,29(2):32
    田云,卢向阳.糖生物学.生物学通报,2002,37(8):15-16
    翁蔚.茶花主要生物活性成分研究及应用展望.杭州:浙江大学,2004
    邬龄盛,叶乃兴,杨江帆等.茶树花酒的研制.中国茶叶,2005,(6):40
    王晓婧,翁蔚,杨子银等.茶花研究利用现关及展望.中国茶叶,2004,26(4):8-10
    王建,龚兴国.糖的抗肿瘤及免疫调节研究进展.中国生化药物杂志,2001,22(1):52-54
    王郁风.开发茶树花资源增加茶农收入.茶叶机械杂志,2002,(3):3-4
    王蘅文.实验肿瘤学基础.北京:人民卫生出版社,1992
    伍锡岳,熊宝珍,何睦礼等.茶树花果利用研究总结报告.广东茶业,1996,(3):11-24
    吴东儒.糖类的生物化学.北京:高教出版社,1986,877
    吴松泉,傅其宏,邱长春.血清IL-2和TNF水平变化对口腔恶性肿瘤的临床意义.实用肿瘤学杂志,1998,12(1):62-63
    严鸿德,汪东风,王泽农等.茶叶深加工技术.北京:中国轻工业出版社,1998
    叶乃兴,杨江帆,邬龄盛等.茶树花主要形态性状和生化成分的多样性分析.亚热带农业研究,2005,1(4): 30-33
    杨惠玲,潘景轩,吴伟康.高级病理生理学.北京:科学出版社,2006:353-358
    杨明,王晓娟,孙红等.树舌多糖抗溃疡作用.中药药理与临床,2004,20(6):11-13
    赵旭,顾亚萍,钱和.茶树花冰茶的研制.安徽农业科学,2008,36(7):2924-2925
    郑建仙.功能性食品.北京:中国轻工业出版社,1995:9-13
    周鹏,谢明勇,王远兴.高效液相色谱-电喷雾质谱法用于茶多糖蛋白的纯度和相对分子质量的测定.2004,22(1):27-29
    张劲松,李卫军.肿瘤免疫抑制与治疗田.国外医学,2001,24(1):50-53
    张荫晶.中国癌症研究进展:北京:北京医科大学与中国协和医科大学联合出,1996:174-178
    张冀伸.多糖的结构测定.生物化学与生物物理进展,1983,(5):18-23
    左笑,张东翔.超声波在油脂提取中的应用.粮油加工,2007(11):70-73

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700