WO2012058935A1 - 板蓝根总多糖及其组分和它们作为疫苗佐剂的用途 - Google Patents

板蓝根总多糖及其组分和它们作为疫苗佐剂的用途 Download PDF

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WO2012058935A1
WO2012058935A1 PCT/CN2011/076310 CN2011076310W WO2012058935A1 WO 2012058935 A1 WO2012058935 A1 WO 2012058935A1 CN 2011076310 W CN2011076310 W CN 2011076310W WO 2012058935 A1 WO2012058935 A1 WO 2012058935A1
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radix isatidis
vaccine
polysaccharide
total
component
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French (fr)
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单俊杰
王玉霞
姜威
武军华
贾培媛
朱婷
赵修南
刁玉林
王晨宇
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中国人民解放军军事医学科学院毒物药物研究所
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Priority to US13/883,486 priority Critical patent/US20140178427A1/en
Publication of WO2012058935A1 publication Critical patent/WO2012058935A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K36/00Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
    • A61K36/18Magnoliophyta (angiosperms)
    • A61K36/185Magnoliopsida (dicotyledons)
    • A61K36/31Brassicaceae or Cruciferae (Mustard family), e.g. broccoli, cabbage or kohlrabi
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/36Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K39/12Viral antigens
    • A61K39/145Orthomyxoviridae, e.g. influenza virus
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K39/39Medicinal preparations containing antigens or antibodies characterised by the immunostimulating additives, e.g. chemical adjuvants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00Drugs for immunological or allergic disorders
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K2039/555Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
    • A61K2039/55511Organic adjuvants
    • A61K2039/55583Polysaccharides

Definitions

  • the invention belongs to the field of medical technology and relates to a total polysaccharide of Radix isatidis and its components and their use as vaccine adjuvants. Specifically, it relates to the Radix isatidis total polysaccharide and its neutral polysaccharide component and acidic polysaccharide component extracted from Radix Isatidis, and their use as vaccine adjuvants or for preparing vaccine compositions.
  • the invention further relates to vaccine adjuvants and vaccine formulations comprising the above-described Radix isatidis total polysaccharide or polysaccharide component, a method of preparing antibodies, and an immunization or inoculation method. Background technique
  • Radix Isatidis can improve immune function and anti-tumor effects.
  • the main chemical components in Radix Isatidis are flavonoids, lignin, alkaloids and polysaccharides. In recent years, the following literature reports on the preparation of total polysaccharides from Radix Isatidis and its effects on animal immune function.
  • the total polysaccharide of Radix Isatidis was used as an immunopotentiator in combination with the porcine reproductive and respiratory syndrome inactivated vaccine to immunize piglets.
  • the results showed that the polysaccharide could significantly increase the percentage of CD3+, CD8+ lymphocytes and specific antibody titers in piglets (Zhang Hongying et al., Chinese Immunology) Journal, 2007, 23: 134 - 137 ).
  • One aspect of the invention relates to a Radix isatidis component (i.e., a neutral polysaccharide component) having the following characteristics:
  • the molecular weight is 2000-10000.
  • Another aspect of the invention relates to a Radix Isatidis component having the following characteristics (ie acidic polysaccharide component):
  • a further aspect of the invention relates to a Radix isatidis total polysaccharide comprising:
  • a Radix isatidis total polysaccharide according to any one of the inventions, characterized in that:
  • a total polysaccharide of Radix isatidis according to any one of the present invention, which has Fig. 1 or
  • the Radix Isatidis is immersed at 30 - 60 or 25 - 55; more preferably, 40 - 55; further preferably, 45 - 55; particularly preferably, 50 - 55C such as 50, 51*C, 52 , 53* ⁇ , or 55.
  • the difference in extraction temperature determines the difference in polysaccharide composition. Below 60C does not affect chemical stability, but the yield is lower; above 60, the yield will increase, but may affect the composition of the total polysaccharide and the polysaccharide structure. In the range of 55, the prepared polysaccharide and polysaccharide components are obtained between the activity retention and the product yield. A good balance.
  • the leaching time is not particularly limited, and is preferably 1-48 hours, more preferably 2-12 hours, still more preferably 2-8 hours, such as 2, 3, 4, 5, 6, 7, or 8. hour.
  • step 2) The aqueous extract in step 1) is dialyzed against ethanol, and the supernatant is dialyzed and lyophilized to obtain the total polysaccharide of Radix isatidis.
  • the Radix isatidis total polysaccharide according to any one of the present invention, which is characterized by any one or more of the following items (1) to (12):
  • step 1) the residue obtained after leaching is subjected to one or more leaching according to the same conditions, and the aqueous extract is combined;
  • Step 1) The water used in the process is distilled water or deionized water;
  • Step 1) The amount of water used is 5- to 15-fold (L/Kg) of Radix isatidis;
  • step 1) The blue roots used in step 1) are smashed radix isatidis;
  • the Radix isatidis used in step 1) is a Radix isatidis residue leached with an organic solvent such as petroleum ether, ethyl acetate, chloroform, diethyl ether, n-hexane, cyclohexane, n-butanol, ethanol or methanol (for example, 75% ethanol extraction, which can be leached for 24 hours); the organic solvent extraction part can be used for other purposes (such as separation of other active small molecule components), improve the utilization of the raw material Radix, for polysaccharides or polysaccharide components Extraction does not affect.
  • an organic solvent such as petroleum ether, ethyl acetate, chloroform, diethyl ether, n-hexane, cyclohexane, n-butanol, ethanol or methanol (for example, 75% ethanol extraction, which can be leached for 24 hours); the organic solvent extraction part can be used for other purposes (such as separation
  • step 1) stir during the leaching
  • step 1) the obtained aqueous extract is concentrated under reduced pressure to obtain a concentrated aqueous extract
  • the ethanol alcohol precipitation conditions are: the final concentration of ethanol after the alcohol precipitation is 60 - 80%; preferably, the alcohol precipitation time is greater than 12 hours;
  • step 2) the precipitate obtained by centrifugation of ethanol alcohol is further subjected to one or more ethanol alcohol precipitation, and the supernatant is combined; (10) in step 2), the dialysis bag used for dialysis has a molecular weight cut-off of more than 1000; the dialysis bag of the molecular weight range can effectively retain polysaccharides and oligosaccharides;
  • step 2) dialysis is carried out one or more times;
  • step 2) the obtained dialysate is concentrated (e.g., concentrated under reduced pressure) at 50 X: - 55 X: before lyophilization.
  • the present invention also relates to a Radix isatidis total polysaccharide prepared according to the above preparation method.
  • the Radix isatidis total polysaccharide has the characteristics of the Radix isatidis total polysaccharide of any of the foregoing.
  • the Radix isatidis total polysaccharide of any of the present invention was subjected to DEAE-cellulose column chromatography to obtain a water-eluting fraction.
  • the present invention also relates to a Radix isatidis neutral polysaccharide fraction prepared according to the above preparation method.
  • the Radix isatidis neutral polysaccharide component has the characteristics of the Radix isatidis neutral polysaccharide component of any of the foregoing.
  • the total extract of Radix isatidis of any of the present invention was subjected to DEAE-cellulose column chromatography to obtain a fraction eluted with 0.25 NaHC0 3 .
  • the present invention also relates to a Radix isatidis acid polysaccharide component prepared according to the above production method.
  • the Radix isatidis acid polysaccharide component has the characteristics of the Radix isatidis acid polysaccharide component of any of the foregoing.
  • a further aspect of the invention relates to a pharmaceutical composition comprising the invention A Ban GmbH polysaccharide component or a Radix isatidis total polysaccharide; optionally, further comprising a pharmaceutically acceptable adjuvant.
  • a further aspect of the present invention relates to a vaccine adjuvant comprising the Radix isatidis polysaccharide component or Radix isatidis total polysaccharide according to any one of the present invention; in particular, the vaccine adjuvant is an attenuated vaccine, a protein vaccine, DNA An adjuvant for a vaccine or polypeptide vaccine.
  • a further aspect of the invention relates to a vaccine formulation or vaccine composition comprising the Radix isatidis total polysaccharide or Radix isatidis polysaccharide component of the invention.
  • the vaccine preparation or vaccine composition according to any one of the present invention which is an attenuated vaccine, a protein vaccine, a DNA vaccine or a polypeptide vaccine; specifically, an H1N1 influenza vaccine.
  • a further aspect of the invention relates to the use of the Radix isatidis polysaccharide component or the Radix isatidis total polysaccharide as a vaccine adjuvant according to any one of the inventions; or to the preparation of a vaccine preparation, a vaccine composition, or an antibody.
  • the vaccine preparation is an attenuated vaccine, a protein vaccine, a DM vaccine or a polypeptide vaccine
  • the vaccine adjuvant is an adjuvant of an attenuated vaccine, a protein vaccine, a DNA vaccine or a polypeptide vaccine
  • a further aspect of the invention relates to a method of preparing an antibody comprising the step of using an effective amount of the Radix isatidis polysaccharide component and/or Radix isatidis total polysaccharide; in particular, the antibody is a monoclonal antibody or a polyclonal antibody.
  • a further aspect of the invention relates to an immunization method or method of inoculation comprising the step of administering to a mammal an effective amount of a vaccine formulation or vaccine composition of the invention.
  • the mammal is a human.
  • the vaccine preparation or vaccine composition is an attenuated vaccine, a protein vaccine, a DNA vaccine or a polypeptide vaccine; more specifically, an H1N1 influenza vaccine.
  • the dosage must be determined by the attending physician within the scope of sound medical judgment.
  • the term "blueberry polysaccharide component” means a Radix isatidis neutral polysaccharide component and/or an acidic polysaccharide component unless otherwise specified.
  • the term "effective amount" refers to a dose of a vaccine formulation or vaccine composition that achieves an immunological effect in a mammal.
  • the Radix isatidis total polysaccharide and its neutral polysaccharide component and acidic polysaccharide component of the present invention can be used as an adjuvant for an attenuated vaccine, a protein vaccine, a DM vaccine or a polypeptide vaccine.
  • the Radix isatidis total polysaccharide or polysaccharide component of the present invention can be used as a good vaccine adjuvant.
  • the preparation process of the total polysaccharide and polysaccharide component of Radix isatidis of the invention is simple, the cost is low, and the yield is high, which is advantageous for large-scale production.
  • Fi g. 1 DEAE-cellulose column chromatography elution curve of total polysaccharide A of Radix Isatidis (polyphenol component detected by phenol-sulfuric acid method, wavelength of 490 nm).
  • Fi g. 2 DEAE-cellulose column chromatography elution curve of Radix isatidis total polysaccharide A (absorbance measured at 280 nm wavelength).
  • Fig. 6 OVA compatibility
  • BLG- A 50 ⁇
  • the first immunization of mouse serum antibody titer. Mean SD; n 5.
  • BLG-A lmg/mouse; OVAO. 06mg/mouse).
  • Fig. 7 OVA compatibility
  • BLG- A 50 ⁇ 55*C
  • the second antibody immunized mice serum titer. Mean SD; n 5.
  • BLG-A lmg/mouse; OVAO. 06mg/mouse).
  • Fig. 11 H1N1 virus compatibility BLG-A1 serum antibody titer of primary immunized mice.
  • HlNl 3 g/mouse
  • Fig. 12 H1N1 virus compatibility BLG-A2 serum antibody titer of primary immunized mice.
  • HlNl 3 g/mouse
  • Fig. 13 Antibody titer of mice immunized with BLG-Al and H1N1 attenuated vaccine (Al: 10 mg/ml, lmg/mouse).
  • Fig. 14 Antibody titer of mice immunized with BLG-A2 and H1N1 attenuated vaccine (A2: 10 mg/ml, lmg/mouse). detailed description
  • the twice extracted aqueous extracts were combined, concentrated under a reduced pressure of 50 - 55 to 1000 ml, and then added in 3 volumes (3000 ml) of 95% ethanol for 48-72 hours of alcohol precipitation.
  • the alcohol precipitation solution was centrifuged (3000r/minx lOmin), and the precipitate was added to 1000 ml of water to stir and dissolve, centrifuged, and precipitated for the same operation twice.
  • the dissolved supernatant was combined and placed in a dialysis bag (molecular weight cutoff >1000). After dialyzing for 48 hours, the distilled water was exchanged for another 24 hours.
  • the alcohol precipitation solution was centrifuged (3000r/minx lOmin), and the precipitate was added to 1000 ml of water to stir and dissolve, centrifuged, and the precipitate was again worked twice.
  • the dialysate was concentrated to a concentration of about 200 ml under a reduced pressure of 50 - 55, and placed in a vial for lyophilization to obtain a pale yellow powder, that is, a total amount of BLAN-A sample 2 (yield rate: 0.438 %).
  • Example 3 Preparation of Radix Isatidis Neutral Polysaccharide Component (BLG-A1) and Acidic Polysaccharide Component (BLG-A2)
  • the lycopene total polysaccharide lg prepared in Example 2 was dissolved in 50 ml of distilled water, and the solution was applied to a DEAE-cellulose column ( ⁇ 8 cm X 35 cm), respectively, using water, 0.25 mol / L NaHC0 3 , 0.5 mol/L NaHC0. 3 and 0.1 mol / L NaOH were continuously eluted, and the polysaccharide fraction was detected by the sulfuric acid-phenol method (Fig.
  • the Radix isatidis total polysaccharide was prepared as in Example 2, and the neutral polysaccharide component and the acidic polysaccharide component were prepared as in Example 3.
  • the sugar content was determined by the sulfuric acid-phenol method.
  • the total polysaccharide BLAN-A is a light yellow powder with a sugar content of 58.93% (calculated as glucose).
  • the neutral polysaccharide component BLG-A1 is a white powder with a sugar content of 98.13% (calculated as glucose).
  • the acidic polysaccharide component BLG-A2 is a pale yellow powder with a sugar content of 92.11% (calculated as glucose).
  • the uronic acid content was determined by the meta-hydroxybiphenyl method.
  • the uronic acid content of the total polysaccharide BLG-A of Radix Isatidis was 13.36% (calculated as galacturonic acid).
  • the acid polysaccharide component BLG-A2 has a uronic acid content of 6.41% (calculated as galacturonic acid).
  • the ratio of monosaccharides was obtained by derivatization and gas chromatography.
  • the molecular weight of the neutral polysaccharide component BLG-A1 is 2000 - 10000.
  • the acidic polysaccharide component BLG-A2 has a molecular weight of 3000 - 70,000.
  • Example 5 Determination of adjuvant activity of Radix isatidis total polysaccharide sample 1
  • the Radix isatidis total polysaccharide BLG-A prepared in Example 1 was used as an adjuvant, and ovalbumin (OVA) was used as an antigen, and the mice were intramuscularly injected to measure the antibody titer produced.
  • OVA ovalbumin
  • mice Balb/C, 6-8 weeks, 5/group, female.
  • Radix isatidis total polysaccharide BLG-A prepared by the above Example 1 20 mg / ml; OVA: 1.2 mg / ml; aluminum adjuvant: 2 mg / ml;
  • sputum group PBS+0VA
  • aluminum adjuvant group aluminum adjuvant +0VA
  • BLG- ⁇ group BLG-A+0VA
  • solvent control group normal saline.
  • Immunization protocol Animals were bled in the tail vein 3 weeks after the first immunization with the immunization group, and the antibody titer in the serum was determined. Detection of antibody drops at week 3 after the first immunization Degree, the fourth week of booster immunization, 2 weeks after the second immunization, blood was taken from the tail vein, and the antibody titer in the serum was measured. According to the titer, the third immunization was performed 2 weeks after the measurement. The antibody titer in serum was determined by ELISA.
  • Antigen coating solution 50 mmol/L carbonate buffer pH 9.6. Anhydrous Na 2 C0 3 1.696 g, NaHC0 3 2.856 g was added and dissolved in water to 1000 ml, and the pH was adjusted to 9.6.
  • Washing solution (lOxPBST, pH 7.4): Weigh NaCl 80 g, KC12g, Na 2 HP0 4 29 g, KH 2 P0 4 2 g, Tween-20 10 ml, double distilled water to 1000 ml, adjust pH 7.4, 10 times diluted for use.
  • Blocking solution 1% BSA, dissolved in 50 mmol/L PBS pH 7.4.
  • Substrate solution (TMB-H 2 0 2 ): Mix the substrate liquids A and B in equal volume when using, add 30% H 2 0 2 , and the final concentration is 0.5%.
  • Substrate A weigh 200 mg of TMB, 100 ml of absolute ethanol, and add double distilled water to 1000 ml.
  • Substrate B (0.1 mol/L citric acid-0.2 mol/L Na 2 HP0 4 buffer), Na 2 HP0 4 24.8 g, citric acid 19.33 g, add double distilled water to 1000 ml, adjust pH 5.0 - 5.4.
  • OVA was dissolved in the antigen coating solution at a concentration of 4 ⁇ 8 /ml, and coated in a 96-well plate (Costa) ⁇ /well overnight. Wash PBST 3 times, 1 % BSA-PBS 37 for 1 h. After washing 3 times with PBST, a mouse serum sample diluted with PBST was added, 100 ⁇ M/well, and 37 incubation temperature for 1 h. Wash 3 times with PBST, add HRP-goat anti-mouse IgG ( 1: 1000, PBST) 37 X: Incubate temperature 1, wash 6 times with PBST, add ⁇ substrate solution, and add 50 ⁇ 1 2 NH 2 S0 4 to stop the reaction. Determination of ⁇ 45 . .
  • Example 5 The specific procedure was the same as in Example 5 except that the sample used was the Radix isatidis total polysaccharide sample 2 prepared in Example 2. The results are shown in Fig. 6 and Fig. 7.
  • the Radix isatidis neutral polysaccharide component BLG-A1 and the acidic polysaccharide BLG-A2 were prepared as adjuvants in Example 3, and ovalbumin (OVA) was used as an antigen.
  • OVA ovalbumin
  • BLG-Al 10 mg/ml
  • BLG-A2 10 mg/ml
  • OVA 1.2 mg/ml
  • Aluminum adjuvant 2 mg/ml
  • Control solvent physiological saline.
  • the total polysaccharide BLG of Radix Isatidis was separated by DEAE-cellulose column chromatography, and the neutral polysaccharide component BLG-A1 and the acidic polysaccharide component BLG-A2 were obtained, and further adjuvant activity determination was carried out according to the immunization protocol. After secondary immunization, the A1 and A2 components have higher immunoadjuvant activity (Fig. 8 and Fig. 9).
  • the neutral polysaccharide component BLG-A1 and the acidic polysaccharide BLG-A2 prepared in Example 3 were used as adjuvants, and the mice were immunized with H1N1 influenza vaccine (H1N1 influenza virus lysate, 30 g/ml), and the same was observed after 2 weeks.
  • Antibody titers were determined using the ELASI method. The experiment was divided into normal saline group, H1N1 vaccine group and H1N1 + BLG-A1 group. The results showed that H1N1 virus lysate was an immunizing antigen, and BLG-A1 and BLG-A2 were used as adjuvants to produce higher titer antibodies.
  • Fig. 11 , Fig. 12 Example 9: Antibody titer of Radix isatidis neutral polysaccharide component and acidic polysaccharide component Determination 3
  • the Radix isatidis total polysaccharide sample 1 prepared in Example 1 was subjected to the method of Example 3 to obtain a Radix isatidis neutral polysaccharide component and an acidic polysaccharide component, respectively.
  • Example 8 The experimental procedure is referred to in Example 8.

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Description

板蓝根总多糖及其组分和它们作为疫苗佐剂的用途 技术领域
本发明属于医药技术领域, 涉及一种板蓝根总多糖及其组分 和它们作为疫苗佐剂的用途。 具体地, 涉及从中药材板蓝根中提 取的板蓝根总多糖及其中性多糖组分和酸性多糖组分, 以及它们 作为疫苗佐剂或用于制备疫苗组合物的用途。 本发明还涉及包含 上述板蓝根总多糖或多糖组分的疫苗佐剂和疫苗制剂、 一种制备 抗体的方法、 以及一种免疫或接种方法。 背景技术
板蓝根为十字花科植物菘蓝 ( Isat is indigot ica ) 的干燥根, 具有清热解毒、 凉血利咽之功效, 常用于温毒发斑, 舌绛紫暗, 喉 痹, 烂喉丹痧, 丹毒和痈肿。 现代药理研究表明板蓝根能提高免疫 功能和抗肿瘤作用。 板蓝根中主要化学成分有黄酮、 木质素、 生物 碱以及多糖等。近年来有以下文献报道有关板蓝根总多糖制备方法 以及对动物免疫功能的影响。
邱妍等(江苏农业科学, 2009, 2: 32 - 35 )采取水煎醇沉法 提取板蓝根总多糖(糖含量为 56% ) , 研究对鸡外周血 T淋巴细胞 IL-4、 IFN- γ的 mRNA表达的影响。 结果表明该多糖能提高淋巴细 胞 IL- 4、 IFN- γ的 mRNA表达水平。 邱妍等(南京农业大学学报 2008, 31 (1) : 77- 8 ) 又将该多糖与鸡新城疫-传染性支气管炎二 联 (NDV- IBV)弱毒苗一起免疫小鼠,能显著提高新城疫 HI抗体效价, 促进外周血 T淋巴细胞增殖, 提高 CD4+、 CD8+T淋巴细胞含量和 CD4+/CD8+值。
孔祥峰等 (畜牧兽医学报, 2004, 35 (4), 468-472 )用新城疫 IV 系疫苗免疫雏鸡,在免疫前、 后分别注射高、 低剂量的板蓝根总多 糖(糖含量为 82. 94 % ) , 结果表明能不同程度地提高抗体效价, 且与给药时间、 剂量和免疫接种次数有一定关系。
张红英等(河南农业大学学报, 2009 , 43 ( 2 ) : 173 - 176 ) 测定不同浓度的板蓝根总多糖对体外培养的猪脾脏淋巴细胞增殖 的影响。 结果表明板蓝根总多糖能显著促进猪脾脏淋巴细胞的增 殖, 同时又能协同 ConA或 LPS诱导的猪脾脏淋巴细胞增殖, 能显 著促进由 ConA诱导的猪脾脏淋巴细胞分泌 IFN- γ,抑制 IL- 2的分 泌, 显著促进 NO的分泌。
以板蓝根总多糖作为免疫增强剂联合猪繁殖与呼吸综合征灭 活疫苗免疫仔猪, 结果显示该多糖能显著提高仔猪的 CD3+、 CD8+ 淋巴细胞的百分数和特异性抗体滴度(张红英等,中国免疫学杂志, 2007, 23: 134 - 137 ) 。
Chen L 等( Intervi trology, 2005, 48: 207- 212 )将板蓝根 水煎液作为佐剂, 与手足口病病毒( FMDV )的 DNA疫苗一起注射小 鼠, 能明显增加 FMDV的抗体反应, 促进 T细胞增殖, 增强小鼠对 手足口病病毒攻击的保护能力, 作用效果优于单独注射 FMDV DNA。
陈亮等(中国专利, 专利号 ZL03145034. 2, 授权日 2006年 5 月 17 日)将板蓝根水煎液作为佐剂, 与口蹄疫病毒 DNA、 乙肝病毒 核心抗原原核表达产物或口蹄疫灭活疫苗联用,抗体产生量明显增 加。 该佐剂能直接或间接激活活性细胞, 增加抗原表面积, 延长抗 原在局部组织的存留时间。
李宁(中国专利, 公开号 CN101703772A, 公开日 2010年 5月 12 日)制备复方板蓝根口服液, 其中板蓝根总多糖 0. 5 - 20kg, 黄 芪多糖含量为 50 %的黄芪多糖原料药 0. 5 - 20kg, 淫羊藿多糖含量 为 50 %的淫羊 $多糖原料药 0. 5 - 10kg,巴戟天提取物 0. 5 - 10kg, 山梨酸钟 50g, 余量的注射用水。 该口月良液对于禽类由于疾病或饲 养条件造成的免疫力低下具有良好疗效, 同时可增强疫苗免疫效 果。
也有文献报道了板蓝根总多糖的制备方法。
陈浩然等(中国药房, 2009 , 20 ( 21 ) : 1642 - 1644 )将板蓝 根药材以 8倍、 6倍量水提取 2次, 水提取液减压浓缩, 加入乙醇 至终浓度为 70%, 得到沉淀为板蓝根粗多糖部位。 板蓝根总多糖水 溶解后, 加乙醇分级沉淀, 得到 50%和 70%醇沉多糖部分, 70%醇沉 多糖经 SephadexGl OO排阻色谱分离,得到板蓝根纯化多糖 A。板蓝 根总多糖 A的相对分子质量为 11 700, 多糖 A水解后有 2个斑点, 分别为阿拉伯糖和半乳糖。
张体祥等(河南工程学院学报, 2009 , 21 ( 3 ) : 13 - 17 )采 用水煮醇沉方法制备板蓝根粗多糖, 再将粗多糖加水溶胀、 煮沸和 离心, 取上层清液滴加一定量的三氯乙酸, 剧烈搅拌, 离心除去沉 淀, 经透析、 醇沉、 洗涤、 干燥, 即得脱蛋白多糖。 利用葡聚糖凝 胶(SephadexG-100)柱层析法进行多糖的分离,得到一种分子量均 一的 ISP2多糖, 其相对分子量为 2. 24 x l05。 ISP2是由鼠李糖、 果糖、葡萄糖、半乳糖四种单糖组成的杂多糖,它们的质量比为 1: 4: 58. 2 : 3. 1。
张体祥等(时珍国药, 2009 , 20 ( 8 ) : 1992 - 1994 )采用以 下路线制备精制多糖:板蓝根—粉碎—称量—乙醚脱脂―热水浸提 →离心取上清液→残渣重复浸提两次→合并上清液→减压浓缩→ 透析→测含糖量→乙醇沉淀→有机溶剂洗涤→真空干燥→板蓝根 粗多糖。粗多糖溶液― SehadexG-100柱层析→洗脱液浓缩→乙醇沉 淀→冷冻干燥→精制板蓝根总多糖。 该多糖得率 25. 63%, 多糖含 量 76. 42%。 鲁建江等(广东药学, 2001, 11 ( 4 ) : 16 - 18 )将板蓝根洗 净, 晾干, 精密称取 100g, 置索氏提取器中, 依次用石油醚 (60- 90*€)、 乙醚和 80%乙醇回流提取 4h。 残渣挥干溶剂后, 再继续以 水回流提取 4h, 减压浓缩至一半体积, 加入 0.1%活性炭, 脱色, 滤过, 滤液加入 95%乙醇使溶液含醇 80%, 静置过夜, 滤过, 残渣 用乙醚、 无水乙醇反复洗涤, 得板蓝根总多糖。 测得板蓝根中多糖 含量 0.8099%。
然而, 现有的板蓝根总多糖的制备方法比较烦瑣, 成本较高, 并且对其中的活性多糖成分可能有所破坏(特别是煎煮和回流步 骤) 。 此外, 板蓝根总多糖的收率也往往并不理想。 发明内容
本发明人经过创造性的劳动和深入的研究, 得到了一种板蓝 根总多糖和多糖组分(中性多糖组分和酸性多糖组分) 。 并且本 发明人惊奇地发现, 所述板蓝根总多糖和多糖组分能够作为良好 的疫苗佐剂。 由此提供了下述发明: 本发明的一个方面涉及一种具有如下特征的板蓝根多糖组分 (即中性多糖组分) :
(1)其包含葡萄糖、 半乳糖、 甘露糖、 鼠李糖、 阿拉伯糖和 木糖, 并且摩尔比 Rha: Ara: Xyl: Man: Glc: Gal = 1.00: 2.35: 2.38: 9.27: 27.47: 13.03;
(2) 以葡萄糖计算, 含糖量为 98.13%;
(3)分子量为 2000— 10000。 本发明的另一个方面涉及具有如下特征的板蓝根多糖组分 (即酸性多糖组分) :
( 1 )其包含阿拉伯糖、 葡萄糖、 半乳糖、 鼠李糖和甘露糖, 并且摩尔比为 Rha: Ara: Man: Glc: Gal = 1.00: 40.06: 0.61: 22.24: 18.04;
( 2) 以葡萄糖计算, 含糖量为 92.11%;
( 3) 以半乳糖醛酸计算, 糖醛酸含量为 6.41%;
( 4)分子量为 3000 - 70000。 本发明的再一方面涉及一种板蓝根总多糖, 其包含:
( 1 )上述的板蓝根中性多糖组分; 和
( 2)上述的板蓝根酸性多糖组分。
根据本发明任一项所述的板蓝根总多糖, 其特征在于:
( 1 ) 以葡萄糖计算, 含糖量为 58.93%;
( 2) 以半乳糖醛酸计算, 糖醛酸含量为 13.36%。
根据本发明任一项所述的板蓝根总多糖, 其具有 Fig.1或者
Fig.2所示的特征。
根据本发明任一项所述的板蓝根总多糖, 其通过如下步骤制 得:
1)用水在 O - 60 下浸提板蓝根, 得到水提液;
优选地,在 30 - 60 或 25 - 55 下浸提板蓝根; 更优选 地, 为 40 - 55 ; 进一步优选地, 为 45 - 55 ;特别优选地, 为 50 - 55C 例如 50 、 51*C、 52 、 53*Ό、 或 55 。
不拘束于理论的限制, 提取温度不同决定着多糖组成不同。 低于 60C —般不影响化学稳定性, 但得率较低; 高于 60 , 得 率会升高, 但可能影响总多糖的组成和多糖结构。 在 55 范围内, 制备的多糖和多糖组分的活性保留和产品收率之间得到 了良好的平衡。
浸提的时间并不特别限定, 优选的是 1-48小时, 更优选的 是 2- 12小时, 进一步优选的是 2- 8小时, 例如 2、 3、 4、 5、 6、 7、 或 8小时。
2) 将步骤 1)中的水提液经乙醇醇沉、 上清液透析和冷冻干 燥, 得到板蓝根总多糖。
根据本发明任一项所述的板蓝根总多糖, 其特征在于如下的 (1) - (12)项中的任意一项或多项:
( 1 )步骤 1 )中, 将浸提后得到的残渣按照相同条件进行一 次或多次浸提, 合并水提液;
(2) 步骤 1) 中所用水为蒸馏水或去离子水;
(3) 步骤 1) 中水的用量为板蓝根的 5- 15倍量(L/Kg) ;
(4) 步骤 1) 中所用板蓝根为粉碎的板蓝根;
(5) 步骤 1) 中所用板蓝根为经过有机溶剂 (例如石油醚、 乙酸乙酯、 氯仿、 乙醚、 正己烷、 环己烷、 正丁醇、 乙醇或甲醇) 浸提过的板蓝根残渣(例如用 75%乙醇浸提,可以是浸提 24小时); 有机溶剂萃取的部分可以用于其它用途(例如分离其它的活 性小分子成分) , 提高了原料板蓝根的利用率, 对多糖或多糖组 分的提取并不影响。
(6) 步骤 1) 中, 浸提期间进行搅拌;
(7)步骤 1) 中, 将得到的水提液进行减压浓缩, 得到浓缩 的水提液;
(8)步骤 2) 中, 乙醇醇沉的条件是: 醇沉后乙醇的终浓度 为 60 - 80%; 优选地, 醇沉的时间大于 12小时;
(9)步骤 2) 中, 将乙醇醇沉后离心得到的沉淀再进行一次 或多次乙醇醇沉, 合并上清液; ( 10 )步骤 2 )中 ,透析所用的透析袋的截留分子量大于 1000; 该分子量范围的透析袋能够有效地截留多糖和寡糖;
( 11 ) 步骤 2 ) 中, 透析进行一次或多次;
( 12 ) 步骤 2 ) 中, 在冷冻干燥之前, 将得到的透析液在 50 X: - 55 X:下进行浓缩 (例如减压浓缩) 。
本发明还涉及根据上述制备方法制得的板蓝根总多糖。 在具 体的实施方案中, 该板蓝根总多糖具有前述任一项的板蓝根总多 糖的特征。 根据本发明任一项所述的板蓝根中性多糖组分, 其通过如下 步骤制得:
将本发明任一项的板蓝根总多糖经 DEAE -纤维素柱层析, 得 到水洗脱部分。
本发明还涉及根据上述制备方法制得的板蓝根中性多糖组 分。 在具体的实施方案中, 该板蓝根中性多糖组分具有前述任一 项的板蓝根中性多糖组分的特征。 根据本发明任一项所述的板蓝根多糖组分, 其通过如下步骤 制得:
将本发明任一项的板蓝根总多糖经 DEAE -纤维素柱层析, 得 到 0. 25 NaHC03洗脱部分。
本发明还涉及根据上述制备方法制得的板蓝根酸性多糖组 分。 在具体的实施方案中, 该板蓝根酸性多糖组分具有前述任一 项的板蓝根酸性多糖组分的特征。 本发明的再一方面涉及一种药物组合物, 其包含本发明中任 一项所述的板蓝根多糖组分或板蓝根总多糖; 可选地, 还包含药 学上可接受的辅料。 本发明的再一方面涉及一种疫苗佐剂, 其包含本发明中任一 项所述的板蓝根多糖组分或板蓝根总多糖; 具体地, 所述疫苗佐 剂为减毒疫苗、 蛋白质疫苗、 DNA疫苗或多肽疫苗的佐剂。 本发明的再一方面涉及一种疫苗制剂或疫苗组合物, 其包含 本发明的板蓝根总多糖或板蓝根多糖组分。
根据本发明任一项所述的疫苗制剂或疫苗组合物, 其为减毒 疫苗、 蛋白质疫苗、 DNA疫苗或多肽疫苗; 具体地, 为 H1N1流感 疫苗。 本发明的再一方面涉及本发明中任一项所述的板蓝根多糖组 分或者板蓝根总多糖作为疫苗佐剂的用途;或者在制备疫苗制剂、 疫苗组合物、 或抗体中的用途。
根据本发明任一项的用途, 其中, 所述疫苗制剂为减毒疫苗、 蛋白质疫苗、 DM 疫苗或多肽疫苗; 所述疫苗佐剂为减毒疫苗、 蛋白质疫苗、 DNA疫苗或多肽疫苗的佐剂。 本发明的再一方面涉及一种制备抗体的方法, 包括使用有效 量的本发明的板蓝根多糖组分和 /或板蓝根总多糖的步骤; 具体 地, 所述抗体为单克隆抗体或多克隆抗体。 本发明的再一方面涉及一种免疫方法或者接种方法, 包括给 予哺乳动物有效量的本发明的疫苗制剂或疫苗组合物的步骤。 在 本发明的一个实施方案中, 所述哺乳动物是人。 具体地, 所述疫 苗制剂或疫苗组合物是减毒疫苗、 蛋白质疫苗、 DNA 疫苗或多肽 疫苗; 更具体地, 为 H1N1流感疫苗。 用量须由主诊医师在可靠的 医学判断范围内作出决定。 在本发明中, 如果没有特殊说明, 术语 "板蓝根多糖组分" 是指板蓝根中性多糖组分和 /或酸性多糖组分。
术语 "有效量" 是指可在哺乳动物中实现免疫效果的疫苗制 剂或者疫苗组合物的剂量。 发明的有益效果
本发明的板蓝根总多糖及其中性多糖组分和酸性多糖组分均 可以用作减毒疫苗、 蛋白质疫苗、 DM 疫苗或多肽疫苗的佐剂。 本发明的板蓝根总多糖或多糖组分能够作为良好的疫苗佐剂。 并 且本发明的板蓝根总多糖和多糖组分的制备过程简单,成本较低, 并且收率较高, 有利于大规模生产。 附图说明
Fi g. 1: 板蓝根总多糖 A 的 DEAE -纤维素柱层析洗脱曲线 (苯酚 -硫酸法检测多糖组分, 490nm波长) 。
Fi g. 2: 板蓝根总多糖 A 的 DEAE -纤维素柱层析洗脱曲线 ( 280nm波长下测定吸光度 ) 。
Fi g. 3 : OVA 配伍 BLG- A 第 1 次免疫小鼠血清抗体滴度。 mean+SD; n=5。
Fi g. 4: OVA 配伍 BLG- A 第 2 次免疫小鼠血清抗体滴度。 mean+SD; n=5。 Fig. 5: OVA 配伍 BLG- A 第 3 次免疫小鼠血清抗体滴度。 mean+SD; n=5。
Fig. 6: OVA配伍 BLG- A ( 50 ~ )第 1次免疫小鼠血清抗 体滴度。 mean SD; n=5。 (BLG- A: lmg/鼠; OVAO. 06mg/鼠)。
Fig. 7: OVA配伍 BLG- A ( 50 ~ 55*C ) 第 2次免疫小鼠血清抗 体滴度。 mean SD; n=5。 (BLG- A: lmg/鼠; OVAO. 06mg/鼠)。
Fig. 8: OVA配伍 BLG-Al, BLG-A2第 1次免疫小鼠血清抗体滴 度。 mean土 SD; n=5。
Fig. 9: OVA配伍 BLG-Al, BLG-A2第 2次免疫小鼠血清抗体滴 度。 mean土 SD; n=5。
Fig. 10: OVA配伍 BLG-Al, BLG-A2第 3次免疫后小鼠血清抗 体滴度。 mean土 SD; n=5。
Fig. 11: H1N1病毒配伍 BLG- A1初次免疫小鼠血清抗体滴度。
HlNl: 3 g/鼠, BLG-Al: lmg/鼠. mean土 SD; n=5。
Fig. 12: H1N1病毒配伍 BLG- A2初次免疫小鼠血清抗体滴度。
HlNl: 3 g/鼠, BLG-A2: 0. lmg/鼠. mean+SD; n=5。
Fig. 13: BLG-Al 与 H1N1减毒疫苗免疫小鼠抗体滴度( Al: 10mg/ml, lmg/鼠 ) 。
Fig. 14: BLG-A2 与 H1N1减毒疫苗免疫小鼠抗体滴度( A2: 10mg/ml, lmg/鼠 ) 。 具体实施方式
下面将结合实施例对本发明的实施方案进行详细描述, 但是 本领域技术人员将会理解, 下列实施例仅用于说明本发明, 而不 应视为限定本发明的范围。 实施例中未注明具体条件者, 按照常 规条件或制造商建议的条件进行。 所用试剂或仪器未注明生产厂 商者, 均为可以通过市购获得的常规产品。 实施例 1: 板蓝根总多糖 BLG - A样品 1的制备
中药材板蓝根 lkg, 粉碎, 室温下加入 10L 75%乙醇浸泡 24 小时, 过滤, 离心 OOOr/minx lOmin) , 残渣同样条件再浸提 一次, 合并滤液, 40 - 45 减压回收浸膏。 经过 75%乙醇浸提 后的板蓝根残渣 50 烘干后,加入 15L蒸馏水,在室温下浸提 24 小时, 期间不时搅拌; 然后过滤, 滤液离心 lOmin (转速 3000r/min) , 浸提后的板蓝根残渣在同样条件下进行二次提取。 合并二次提取的水提液, 50 - 55 减压浓缩至 1000ml, 然后加 入 3倍体积( 3000ml ) 95 %的乙醇进行 48 - 72小时的醇沉。 醇沉 溶液离心( 3000r/minx lOmin) , 沉淀部分加入 1000ml水搅拌溶 解, 离心, 沉淀再同样操作二次。 合并溶解的上清液, 装入透析 袋(截留分子量 >1000 ) , 自来水透析 48小时后换蒸馏水再透析 24小时。该透析液 50 - 55 减压浓缩至 200ml左右,装入小瓶 进行冷冻干燥, 获得淡黄色粉末, 即板蓝根总多糖 BLG- A样品 1 (得率为 0. 417% ) 。 实施例 2: 板蓝根总多糖 BLG- A样品 2的制备
中药材板蓝根 lkg, 粉碎后加入 15L蒸馏水, 在 50*€ - 55*€ 温度下浸提 4小时, 期间不时搅拌; 然后过滤, 滤液离心 lOmin (转速 3000r/min) , 浸提后的板蓝根残渣在同样条件下进行二 次提取。合并二次提取的水提液, 50*€ - 55*€减压浓缩至 1000ml, 然后加入 3倍体积( 3000ml )95 %的乙醇进行 48 - 72小时的醇沉。 醇沉溶液离心( 3000r/minx lOmin) , 沉淀部分加入 1000ml水搅 拌溶解, 离心, 沉淀再同样操作二次。 合并溶解的上清液, 装入 透析袋(截留分子量 >1000 ) , 自来水透析 48小时后换蒸馏水再 透析 24小时。 该透析液在 50 - 55 减压浓缩至 200ml左右, 装入小瓶进行冷冻干燥, 获得淡黄色粉末, 即板蓝根总多糖 BLG - A样品 2 (得率为 0. 438 % ) 。
与样品 1的制备相比, 样品 2的制备方法与之相同, 只是样 品 1的制备使用的原料是经过 75 %乙醇浸提后的板蓝根残渣, 目 的是获得浸膏用于其它用途, 而本发明人在后面的实验中发现, 这并不影响制得的板蓝根总多糖的产品组成和效果。 实施例 3: 板蓝根中性多糖组分( BLG - A1 )和酸性多糖组分 ( BLG - A2 ) 的制备
取实施例 2制备的板蓝根总多糖 lg,加入蒸馏水 50ml溶解, 溶解液上样 DEAE -纤维素柱 ( Φ 8cm X 35cm ) , 分别采用水、 0. 25mol /L NaHC03、 0. 5mol/L NaHC03和 0. 1 mol /LNaOH进行连续 洗脱, 采用硫酸-苯酚法检测多糖流分(Fig. 1 ) , 相应获得多糖 组分 BLG - Al ( H20 ) 、 BLG - A2 ( 0. 25mol /L NaHC03 ) 、 BLG - A3 ( 0. 5mol /L NaHC03 )和 BLG - A4 ( 0. 1 mol/L NaOH ) , 同时测定 洗脱液在 280nm处的吸光度, 洗脱曲线见 Fig. 2。 实施例 4: 板蓝根总多糖、 中性多糖组分和酸性多糖组分的 理化性质测定
实验样品:
所用板蓝根总多糖为实施例 2制备, 中性多糖组分和酸性多 糖组分为实施例 3制备。
1. 板蓝根总多糖、 中性多糖组分和酸性多糖组分的含糖量 (以葡萄糖计) 的测定 1 ) 实验方法
采用硫酸 -苯酚法测定糖含量。
2) 实验结果
板蓝根总多糖 BLG- A为淡黄色粉末, 含糖量为 58.93% (以 葡萄糖计算) 。
中性多糖组分 BLG- A1为白色粉末, 含糖量为 98.13% (以 葡萄糖计算) 。
酸性多糖组分 BLG - A2为浅黄色粉末,含糖量为 92.11 %(以 葡萄糖计算) 。
2. 板蓝根总多糖、酸性多糖组分的糖醛酸含量(以半乳糖醛 酸计) 的测定
1 ) 实验方法
采用间羟联苯法测定糖醛酸含量。
2) 实验结果
板蓝根总多糖 BLG- A的糖醛酸含量为 13.36% (以半乳糖醛 酸计算) 。
酸性多糖组分 BLG - A2的糖醛酸含量为 6.41 % (以半乳糖醛 酸计算) 。
3. 板蓝根中性多糖组分和酸性多糖组分的单糖比例的测定
1 ) 实验方法
采用衍生化、 气相色谱分析获得单糖比例。
2) 实验结果
中性多糖组分 BLG- A1主要由葡萄糖、 半乳糖、 甘露糖以及 少量鼠李糖、 阿拉伯糖和木糖组成, 摩尔比为 Rha: Ara: Xyl: Man: Glc: Gal = 1.00: 2.35: 2.38: 9.27: 27.47: 13.03。
酸性多糖组分 BLG- A2主要由阿拉伯糖、 葡萄糖、 半乳糖以 及少量鼠李糖和甘露糖组成, 摩尔比为 Rha: Ara: Man: Glc: Gal = 1.00: 40.06: 0.61: 22.24: 18.04。
4. 板蓝根中性多糖组分和酸性多糖组分的分子量测定
1 ) 实验方法
仪器: HPLC, Waters公司; 色傳柱: TSKsw4000; 流动相: 0.1 M Na2S04; 流速: 0.6 ml/min; 检测器: 示差。
2) 实验结果
中性多糖组分 BLG- A1的分子量为 2000 - 10000。
酸性多糖组分 BLG- A2的分子量为 3000 - 70000。 实施例 5: 板蓝根总多糖样品 1的佐剂活性测定
1. 实驗目的:
将实施例 1制备的板蓝根总多糖 BLG- A作为佐剂,以卵清蛋 白(OVA)为抗原,二者联用肌肉注射小鼠,测定产生的抗体滴度。
2. 实验方法
实验动物: Balb/C, 6- 8周, 5只 /组, 雌性。
药物浓度: 由上述实施例 1 制备的板蓝根总多糖 BLG-A: 20mg/ml; OVA: 1.2mg/ml; 铝佐剂: 2mg/ml;
对照溶剂: 生理盐水
给药剂量: OVA- 60μ8/50μ1/鼠; 铝佐剂 - 100μ8/50μ1/鼠; BLG - A: 1η^/50μ1/鼠;
分组: (1) Ρ组: PBS+0VA; (2)铝佐剂组: 铝佐剂 +0VA; (3) BLG- Α组: BLG- A+0VA; (4)溶剂对照组: 生理盐水。
注射前等体积混合, ΙΟΟμΙ/鼠, 右后肢肌肉注射。
免疫方案: 动物按照免疫分组首次免疫注射后 3周,尾静脉 取血, 测定血清中抗体滴度。 首次免疫注射后第 3周检测抗体滴 度, 第 4周加强免疫, 二次免疫注射后 2周, 尾静脉取血, 测定 血清中抗体滴度,视滴度情况,测定后 2周进行第 3次免疫。 ELISA 测定血清中抗体滴度。
ELISA法所用试剂配制:
抗原包被液: 50 mmol/L 碳酸盐緩冲液 pH9.6。 称取无水 Na2C03 1.696 g, NaHC03 2.856 g加水溶解到 1000 ml, 调节 pH 至 9.6。
洗涤液(lOxPBST, pH7.4):称取 NaCl 80 g, KC12g, Na2HP04 29 g, KH2P04 2 g, Tween-20 10 ml, 双蒸水至 1000 ml, 调节 pH7.4, 10倍稀释使用。
封闭液: 1%BSA, 用 50 mmol/L PBS pH7.4溶解。
底物液( TMB- H202 ): 使用时将底物液 A和 B等体积混合, 加 入 30% H202, 终浓度 0.5%„
底物液 A (TMB) , 称取 TMB 200 mg, 无水乙醇 100 ml, 加 双蒸水至 1000 ml。
底物液 B (0.1 mol/L柠檬酸 -0.2 mol/L Na2HP04緩冲液) , Na2HP0424.8 g,柠檬酸 19.33 g,加双蒸水至 1000 ml,调节 pH5.0 - 5.4。
2 N H2S04
OVA 溶解于抗原包被液, 浓度为 4μ8 /ml, 包被 96 孔板 (Costa) ΙΟΟμΙ/孔, 过夜。 PBST 洗 3遍, 1 % BSA-PBS 37 封闭 1 h。 PBST洗 3遍后加入以 PBST稀释的小鼠血清样品, 100 μ ΐ/孔, 37 孵温 1 h。 PBST洗 3遍, 加入 HRP-羊抗小鼠 IgG ( 1: 1000, PBST) 37 X:孵温 1, PBST洗 6遍, 加入 ΙΟΟμΙ底 物液显色后, 加入 50μ1 2 N H2S04终止反应测定 Α45。。
3. 实验结果 实验结果表明经过第一、 二次免疫所有测试组抗体滴度均比 较低 ( Fig.3和 Fig.4 ) , 而经过第三免疫后 BLG - A注射组动物 血清具有较高的抗体滴度(Fig.5) , 说明 BLG- A能显著促进抗 体产生, 佐剂效果优于铝佐剂(Fig.3、 Fig.4和 Fig.5分别为 1, 2, 3次免疫后 ELISA检测小鼠血清抗 OVA 抗体滴度,平均值土 SD; n=5) 。 实施例 6: 板蓝根总多糖样品 2的佐剂活性测定
具体步骤与实施例 5相同, 除了所用样品为实施例 2制备的 板蓝根总多糖样品 2。 结果如 Fig.6、 Fig.7所示。
结果显示,板蓝根总多糖样品 2能够有效地促进抗体的生成。 实施例 7: 板蓝根中性多糖组分和酸性多糖组分的抗体滴度 测定 1
1. 实驗目的:
分别将实施例 3中制备板蓝根中性多糖组分 BLG - A1和酸性 多糖 BLG- A2作为佐剂, 以卵清蛋白(OVA)为抗原, 二者联用肌 肉注射小鼠, 测定产生的抗体滴度。
2. 实验方法
具体实验步骤参照实施例 5。
药物浓度: BLG- Al: 10mg/ml; BLG- A2: 10mg/ml; OVA: 1.2mg/ml; 铝佐剂: 2mg/ml; 对照溶剂: 生理盐水。
给药剂量: OVA- 60μ8/50μ1/鼠; 铝佐剂 - 100μ8/50μ1/鼠; BLG- A1: 0.5η^/50μ1/鼠; BLG— Α2: 0.5mg/50 l/鼠; 分组: (1) P组: PBS+0VA; (2)铝佐剂组: 铝佐剂 +0VA; ( 3 ) BLG - A1组: BLG - A1+0VA; ( 4 ) BLG - A2组: BLG - A2+0VA; 注射前等体积混合, ΙΟΟμΙ/鼠, 右后肢肌肉注射。
3. 实验结果
板蓝根总多糖 BLG - Α经 DEAE -纤维素柱层析分离, 得到中 性多糖组分 BLG - A1和酸性多糖组分 BLG - A2, 按照免疫方案进 行进一步的佐剂活性功能测定, 经第一、 二次免疫后检测, A1和 A2组分具有较高的免疫佐剂活性(Fig. 8和 Fig. 9 ) 。 第三次免 疫后抗体的滴度没有明显提高 ( Fig. 8、 Fig. 9和 Fig. 10分别为 第 1, 2, 3次免疫后 ELISA检测小鼠血清抗 OVA 抗体滴度,平均值 土 SD; n=5 ) 。 实施例 8: 板蓝根中性多糖组分和酸性多糖组分的抗体滴度 测定 2
分别将实施例 3 制备的中性多糖组分 BLG-A1 和酸性多糖 BLG- A2作为佐剂, 与 H1N1流感疫苗 (H1N1流感病毒裂解液, 30 g/ml ) 混和免疫小鼠, 2周后同样采用 ELASI方法测定抗体滴 度。 实验分为生理盐水组、 H1N1疫苗组和 H1N1 + BLG- A1组, 结 果说明 H1N1病毒裂解液为免疫抗原, BLG- A1和 BLG- A2作为佐剂 初次免疫即可产生较高滴度的抗体(Fig. 11 , Fig. 12 ) 。 实施例 9: 板蓝根中性多糖组分和酸性多糖组分的抗体滴度 测定 3
所用样品: 将实施例 1制备的板蓝根总多糖样品 1 , 按照实 施例 3中的方法,分别制得板蓝根中性多糖组分和酸性多糖组分。
实验步骤参照实施例 8。
结果如 Fig. 13、 Fig. 14所示。
结果显示, 由板蓝根总多糖样品 1制得的板蓝根中性多糖组 分和酸性多糖组分能够有效地促进抗体的生成。
尽管本发明的具体实施方式已经得到详细的描述, 本领域技 术人员将会理解。 根据已经公开的所有教导, 可以对那些细节进 行各种修改和替换, 这些改变均在本发明的保护范围之内。 本发 明的全部范围由所附权利要求及其任何等同物给出。

Claims

权利要求
1. 具有如下特征的板蓝根多糖组分:
(1)其包含葡萄糖、 半乳糖、 甘露糖、 鼠李糖、 阿拉伯糖和 木糖, 并且摩尔比 Rha: Ara: Xyl: Man: Glc: Gal = 1.00: 2.35:
2.38: 9.27: 27.47: 13.03;
(2) 以葡萄糖计算, 含糖量为 98.13%;
(3)分子量为 2000 - 10000。
2. 具有如下特征的板蓝根多糖组分:
(1)其包含阿拉伯糖、 葡萄糖、 半乳糖、 鼠李糖和甘露糖, 并且摩尔比为 Rha: Ara: Man: Glc: Gal = 1.00: 40.06: 0.61: 22.24: 18.04;
(2) 以葡萄糖计算, 含糖量为 92.11%;
(3) 以半乳糖醛酸计算, 糖醛酸含量为 6.41%;
(4)分子量为 3000 - 70000。
3. 一种板蓝根总多糖, 其包含:
( 1 )权利要求 1所述的板蓝根多糖组分; 和
( 2 )权利要求 2所述的板蓝根多糖组分。
4. 根据权利要求 3所述的板蓝根总多糖, 其特征在于:
(1) 以葡萄糖计算, 含糖量为 58.93%;
( 2 )以半乳糖醛酸计算, 糖醛酸含量为 13.36 %。
5. 根据权利要求 4所述的板蓝根总多糖, 其具有 Fig.1或者 Fig.2所示的特征。
6. 根据权利要求 3至 5中任一项所述的板蓝根总多糖, 其通 过如下步骤制得:
1)用水在 50 - 55 下浸提板蓝根, 得到水提液; 2) 将步骤 1)中的水提液经乙醇醇沉、 上清液透析和冷冻干 燥, 得到板蓝根总多糖。
7. 根据权利要求 6所述的板蓝根总多糖, 其特征在于如下的 (1) - (12)项中的任意一项或多项:
(1) 步骤 1) 中, 将浸提后得到的残渣按照相同条件进行一 次或多次浸提, 合并水提液;
(2) 步骤 1) 中所用水为蒸馏水或去离子水;
(3) 步骤 1) 中水的用量为板蓝根的 5- 15倍量(L/Kg) ;
(4) 步骤 1) 中所用板蓝根为粉碎的板蓝根;
(5) 步骤 1) 中所用板蓝根为经过有机溶剂 (例如石油醚、 乙酸乙酯、 氯仿、 乙醚、 正己烷、 环己烷、 正丁醇、 乙醇或甲醇) 萃取过的板蓝根残渣;
(6) 步骤 1) 中, 浸提期间进行搅拌;
(7) 步骤 1) 中, 将得到的水提液进行减压浓缩, 得到浓缩 的水提液;
(8) 步骤 2) 中, 乙醇醇沉的条件是: 醇沉后乙醇的终浓度 为 60 - 80%; 优选地, 醇沉的时间大于 12小时;
(9) 步骤 2) 中, 将乙醇醇沉后离心得到的沉淀再进行一次 或多次乙醇醇沉, 合并上清液;
( 10 )步骤 2 )中,透析所用的透析袋的截留分子量大于 1000;
(11) 步骤 2) 中, 透析进行一次或多次;
(12) 步骤 2) 中, 在冷冻干燥之前, 将得到的透析液在 50 -55 下进行浓缩。
8. 根据权利要求 1所述的板蓝根多糖组分, 其通过如下步骤 制得:
将权利要求 6或 7得到的板蓝根总多糖经 DEAE -纤维素柱层 析, 得到水洗脱部分。
9. 根据权利要求 2所述的板蓝根多糖组分, 其通过如下步骤 制得:
将权利要求 6或 7得到的板蓝根总多糖经 DEAE -纤维素柱层 析, 得到 0. 25 NaHC03洗脱部分。
10. 一种药物组合物, 其包含权利要求 1至 9 中任一项所述 的板蓝根多糖组分或板蓝根总多糖; 可选地, 还包含药学上可接 受的辅料。
11. 一种疫苗佐剂, 其包含权利要求 1至 9 中任一项所述的 板蓝根多糖组分和 /或板蓝根总多糖; 具体地, 所述疫苗佐剂为减 毒疫苗、 蛋白质疫苗、 DNA疫苗或多肽疫苗的佐剂。
12. 一种疫苗制剂或疫苗组合物, 其包含权利要求 1至 9 中 任一项所述的板蓝根多糖组分和 /或板蓝根总多糖; 具体地, 所述 疫苗制剂或疫苗组合物为减毒疫苗、 蛋白质疫苗、 D 疫苗或多 肽疫苗; 更具体地, 为 H1N1流感疫苗。
13. 权利要求 1至 9 中任一项所述的板蓝根多糖组分或者板 蓝根总多糖作为疫苗佐剂的用途; 或者在制备疫苗制剂、 疫苗组 合物、 或抗体中的用途。
14. 根据权利要求 13所述的用途, 其中, 所述疫苗制剂为减 毒疫苗、 蛋白质疫苗、 DNA 疫苗或多肽疫苗; 所述疫苗佐剂为减 毒疫苗、 蛋白质疫苗、 DNA疫苗或多肽疫苗的佐剂。
15. 一种制备抗体的方法, 包括使用有效量的权利要求 1至 9 中任一项所述的板蓝根多糖组分和 /或板蓝根总多糖的步驟;具体 地, 所述抗体为单克隆抗体或多克隆抗体。
16. 一种免疫方法或者接种方法, 包括给予哺乳动物有效量 的权利要求 12所述的疫苗制剂或疫苗组合物的步骤。
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