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CN100594938C - Pulullan polysaccharide carrier material having the function of targeting therapy of cancer - Google Patents

Pulullan polysaccharide carrier material having the function of targeting therapy of cancer Download PDF

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Publication number
CN100594938C
CN100594938C CN 200710057172 CN200710057172A CN100594938C CN 100594938 C CN100594938 C CN 100594938C CN 200710057172 CN200710057172 CN 200710057172 CN 200710057172 A CN200710057172 A CN 200710057172A CN 100594938 C CN100594938 C CN 100594938C
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pulullan polysaccharide
biotin
carrier material
polysaccharide
pulullan
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CN101036788A (en
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张其清
史艳萍
李学敏
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Institute of Biomedical Engineering of CAMS and PUMC
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Institute of Biomedical Engineering of CAMS and PUMC
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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

The invention relates to pulullan polysaccharide carrier material with targeting effect of tumour, which is pulullan polysaccharide derivative obtained by reacting biotin with pulullan polysaccharide,and the substitution degree of biotin is 20-85%. In organic solvent, the pulullan polysaccharide carrier material is prepared by reacting biotin, dicyclohexylcarbodiimide, 4-dimethylamino pyridine and pulullan polysaccharide and dialysing. The invention reduces the water solubility of pulullan polysaccharide by combining biotin to make it easy to form microparticles in water solution. And the ability of specific binding cell makes the said derivative be carrier material with targeting effect of tumour. The preparation method is simple, and the reproductivity is good.

Description

Pulullan polysaccharide carrier material with cancer target effect
Technical field
The present invention relates to field of medicaments Chinese medicine carrier, particularly a kind of pulullan polysaccharide carrier material and preparation method thereof with cancer target effect.This carrier material is a biotinylation pulullan polysaccharide derivant.
Background technology
Pulullan polysaccharide (Pullulan) Chinese also is translated into pullulan, pullulan, general poly-polysaccharide or pulullan.It is the extracellular polysaccharide of the mould generation of falx of sprouting, and with α-1, it is main that the 6-glycosidic bond constitutes the homotype polysaccharide in conjunction with maltose, be glucose by α-1, the 4-glycosidic bond is combined into maltotriose, two ends are again with α-1, the 6-glycosidic bond is with other maltotriose combination, and macromolecule polysaccharide so repeatedly is formed by connecting.α-1,4-glycosidic bond same α-1, the ratio of 6-glycosidic bond is 2: 1, the degree of polymerization (D.P) is 100-5000.Commodity pulullan mean molecule quantity 2X10 5, approximately form by 480 maltotrioses.This material is nontoxic, no mutagenic action, and colorless and odorless, edible, have excellent biological compatibility, can be degraded by the body endo-amylase, be a kind of excellent drug carrier material.Its aqueous solution viscosity is starkly lower than other polysaccharide solution, makes it more help practical application.Research shows that also pulullan polysaccharide can combine with the galactosylated acceptor of surface of hepatocytes, can be the medicine liver target new material is provided.But, because the water solublity of pulullan polysaccharide is extremely strong, so want in aqueous solution, to prepare can medicine carrying microgranule, must in preparation process, add cross-linking agent, as glutaraldehyde etc., these deleterious cross-linking agent are difficult to thoroughly remove at last handling process, will cause final product to have certain toxicity.In recent years, synthetic hydrophobically modified pulullan polysaccharide derivant has been widely used in the delivery system of number of chemical medicine, protein drug and genomic medicine as pharmaceutical carrier.
Biotin (biotin) claims biotin again, molecular formula C 10H 16N 2O 3S, chemical structural formula:
Figure C20071005717200031
Biotin is a kind of water soluble vitamins of needed by human, but human body can not self be synthetic, must replenish by extraneous.Studies show that further the nearly all cell surface of human body all has biotin receptor expression, especially tumor cell.Tumor cell increases fast needs a large amount of trophic factors, and the biological example element is so cell surface meeting overexpression can form one like this and more normally organize the higher relatively zone in conjunction with biotin in conjunction with the receptor of biotin around tumor cell.Utilize these characteristics can be with the target spot of biotin receptor, by making material have the tumor cell targeting in conjunction with biological rope as a kind of specific recognition.
As micromolecular biotin, the advantage that more traditional tumor targeted molecular antibody has is its Stability Analysis of Structures, and non-immunogenicity has strong specific bond ability with cell surface, enters cell by receptor-mediated endocytosis by cell membrane.
Summary of the invention
The present invention aims to provide a kind of pulullan polysaccharide carrier material with cancer target effect and preparation method thereof, and this carrier material is a kind of biotinylation pulullan polysaccharide derivant that can the target tumor cell.The present invention is the characteristics in conjunction with pulullan polysaccharide and biotin, by in conjunction with biotin, reduced the water solublity of pulullan polysaccharide, make it be easy in water solublity, form microgranule, the ability of their specific bond cell makes this derivant become a kind of carrier material with cancer target effect simultaneously.
Pulullan polysaccharide carrier material with cancer target effect provided by the invention is the pulullan polysaccharide derivant that biotin and pulullan polysaccharide reaction obtain, the biotin substitution value is 20-85%, it is in organic solvent, biotin, dicyclohexylcarbodiimide and 4-dimethylamino pyridine and pulullan polysaccharide reaction prepare through dialysis.Concrete preparation method is as follows:
1) biotin under the room temperature, dicyclohexylcarbodiimide (DCC) and 4-dimethylamino pyridine (DMAP) are dissolved in the organic solvent, react 1-3 hour;
2) under agitation pulullan polysaccharide is added in the above-mentioned reactant liquor, reacted 3-10 days;
3) with reacting liquid filtering, remove DCU, filtrate is put into bag filter, and dialysis is 3-10 days in 1-10L water dialysis solution, changes liquid every half an hour;
4) white depositions after will dialysing is filtered and is collected, and washs 3-5 time respectively with organic solvent and water, and drying obtains the white solid powder.
Described organic solvent is dimethyl sulfoxide (DMSO).
Described biotin: DCC: DMAP: pulullan polysaccharide=1: 0.1~10: 0.01~10: 0.0001~0.001 (mol ratio).
Total reactant concentration is 0.1~25% in the described organic reagent.
The required organic reagent of described washing is: dichloromethane.
The molecular weight of described pulullan polysaccharide is (20,000-200,000) (1.2 * 10 -4-1.2 * 10 -3).Bag filter molecular cut off 2,000-40,000; Dialysis solution is a deionized water.
Pulullan polysaccharide carrier material with cancer target effect provided by the invention is the characteristics in conjunction with pulullan polysaccharide and biotin, by in conjunction with biotin, reduced the water solublity of pulullan polysaccharide, make it be easy in water solublity, form microgranule, the ability of their specific bond cell makes this derivant become a kind of carrier material with cancer target effect simultaneously.The synthetic pulullan polysaccharide carrier material of the present invention is a biotinylation pulullan polysaccharide derivant, and preparation method is simple, favorable reproducibility.
Description of drawings:
Fig. 1 is biotinylation Pulan polysaccharide derivates and pulullan polysaccharide IR spectrogram.
Fig. 2 is a biotinylation Pulan polysaccharide derivates 1The H-NRM spectrogram.(solvent: deuterated dimethyl sulfoxide: DMSO-d 6).
The specific embodiment
Embodiment 1:
Get biotin 2.44g, DCC2.06g and DMAP 611mg add dissolving fully in the 50ml anhydrous dimethyl sulphoxide (DMSO), and react 1 hour.Subsequently, the 244mg pulullan polysaccharide is joined in the above-mentioned reactant liquor reaction 6 days, be reflected under the magnetic agitation and carry out.After finishing, reaction, removes the sediment D CU in the reactant liquor with reactant liquor buchner funnel sucking filtration three times.The every 25ml of filtrate is put into a bag filter, again bag filter is put into 3L deionized water dialysis 6 days, changed water once in per 30 minutes.After dialysis finishes the white depositions in the bag filter is taken out, use the buchner funnel sucking filtration 3 times, the white solid on the funnel is collected, with 200ml washed with dichloromethane 3 times, reuse deionized water wash 3 times is after the drying, obtain white solid matter, the biotin substitution value is 81%.
Substitution value assay method: accurately take by weighing product 50mg, add dissolving with hydrochloric acid and be settled to 20ml.Hydrochloric acid solution is measured the S constituent content by inductively-coupled plasma spectrometer (IPC), again according to formula:
Substitution value %=S element (molal quantity)/anhydrous grape saccharide residue (molal quantity) * 100
Calculate the biotin substitution value.
Fig. 1 is biotinylation Pulan polysaccharide derivates and pulullan polysaccharide IR spectrogram.Fig. 2 is a biotinylation Pulan polysaccharide derivates 1The H-NRM spectrogram.(solvent: deuterated dimethyl sulfoxide: DMSO-d 6).
Embodiment 2:
Get biotin 1.22g, DCC1.06g and DMAP 300mg add dissolving fully among the anhydrous DMSO of 50ml, and react 1 hour.Subsequently, the 244mg pulullan polysaccharide is joined in the above-mentioned reactant liquor reaction 3 days, be reflected under the magnetic agitation and carry out.After finishing, reaction, removes the sediment D CU in the reactant liquor with reactant liquor buchner funnel sucking filtration three times.The every 25ml of filtrate is put into a bag filter, again bag filter is put into 3L deionized water dialysis 6 days, changed water once in per 30 minutes.After dialysis finishes the white depositions in the bag filter is taken out, use the buchner funnel sucking filtration 3 times, the white solid on the funnel is collected, with 200ml washed with dichloromethane 3 times, reuse deionized water wash 3 times obtains white solid matter after the drying.Accurately take by weighing product 50mg, add dissolving with hydrochloric acid and be settled to 20ml.Hydrochloric acid solution is measured the S constituent content by inductively-coupled plasma spectrometer (IPC), again according to formula:
Substitution value %=S element (molal quantity)/anhydrous grape saccharide residue (molal quantity) * 100
Calculating the biotin substitution value is 21%.

Claims (1)

1, a kind of pulullan polysaccharide carrier material with cancer target effect, by biotin and pharmaceutical carrier prepared in reaction, it is characterized in that: described pharmaceutical carrier is a pulullan polysaccharide, in organic solvent, biotin, dicyclohexylcarbodiimide and 4-dimethylamino pyridine and pulullan polysaccharide reaction, be prepared from through dialysis, the biotin substitution value is 81%, and concrete preparation method is as follows:
1) biotin under the room temperature, dicyclohexylcarbodiimide and 4-dimethylamino pyridine are dissolved in the organic solvent dimethyl sulfoxide, react 1-3 hour;
2) under agitation pulullan polysaccharide is added in the above-mentioned reactant liquor, reacted 3-10 days;
3) with reacting liquid filtering, remove the sediment D CU in the reactant liquor, filtrate is put into bag filter, and dialysis is 3-10 days in 1-10L water dialysis solution, changes liquid every half an hour;
4) white depositions after will dialysing is filtered and is collected, and washs 3-5 time respectively with dichloromethane and water, and drying obtains the white solid powder.
CN 200710057172 2007-04-20 2007-04-20 Pulullan polysaccharide carrier material having the function of targeting therapy of cancer Expired - Fee Related CN100594938C (en)

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CN101831000A (en) * 2010-05-21 2010-09-15 中国医学科学院生物医学工程研究所 Purification method of acetyl pullulan polysaccharide folate conjugate and preparation method of nanometer particles thereof
US10130587B2 (en) 2011-01-11 2018-11-20 Capsugel Belgium Nv Hard capsules
US11576870B2 (en) 2017-04-14 2023-02-14 Capsugel Belgium Nv Pullulan capsules
CN110678555B (en) 2017-04-14 2023-10-13 比利时胶囊公司 How to make pullulan
CN110051034B (en) * 2019-05-13 2021-05-07 云南中烟工业有限责任公司 Method for improving moisture retention and moisture resistance of cigarette cut tobacco

Citations (1)

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CN1768860A (en) * 2005-10-24 2006-05-10 天津大学 Hydrazide-based assembly method of multiple biological functional factors on the surface of microparticles

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Publication number Priority date Publication date Assignee Title
CN1768860A (en) * 2005-10-24 2006-05-10 天津大学 Hydrazide-based assembly method of multiple biological functional factors on the surface of microparticles

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Title
Self-assembled nanoparticles of hydrophobically-modifiedpolysaccharide bearing vatiamin H as a targeted anti-cancerdrug delivery system. Kun Na,et al.European Journal of Pharmaceutical Science,No.18. 2003 *

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