CN116392599A - 双层水凝胶肠道递送载体及其应用 - Google Patents
双层水凝胶肠道递送载体及其应用 Download PDFInfo
- Publication number
- CN116392599A CN116392599A CN202310403038.2A CN202310403038A CN116392599A CN 116392599 A CN116392599 A CN 116392599A CN 202310403038 A CN202310403038 A CN 202310403038A CN 116392599 A CN116392599 A CN 116392599A
- Authority
- CN
- China
- Prior art keywords
- hydrogel
- solution
- cmcs
- matrix
- probiotic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000017 hydrogel Substances 0.000 title claims abstract description 45
- 239000006041 probiotic Substances 0.000 claims abstract description 52
- 235000018291 probiotics Nutrition 0.000 claims abstract description 52
- 229920001282 polysaccharide Polymers 0.000 claims abstract description 27
- 239000005017 polysaccharide Substances 0.000 claims abstract description 27
- 230000000529 probiotic effect Effects 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 229920001661 Chitosan Polymers 0.000 claims abstract description 15
- 238000009472 formulation Methods 0.000 claims abstract description 12
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 8
- 238000004132 cross linking Methods 0.000 claims abstract description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 6
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 6
- -1 dialdehyde polysaccharide Chemical class 0.000 claims abstract description 6
- 210000000936 intestine Anatomy 0.000 claims abstract description 3
- 150000004676 glycans Chemical class 0.000 claims description 22
- 240000006024 Lactobacillus plantarum Species 0.000 claims description 17
- 235000013965 Lactobacillus plantarum Nutrition 0.000 claims description 17
- 229940072205 lactobacillus plantarum Drugs 0.000 claims description 17
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims description 14
- 244000063299 Bacillus subtilis Species 0.000 claims description 11
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 10
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 4
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000661 sodium alginate Substances 0.000 claims description 4
- 235000010413 sodium alginate Nutrition 0.000 claims description 4
- 229940005550 sodium alginate Drugs 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000003113 alkalizing effect Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 229920002307 Dextran Polymers 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 239000001814 pectin Substances 0.000 claims description 2
- 235000010987 pectin Nutrition 0.000 claims description 2
- 229920001277 pectin Polymers 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims 1
- 238000004108 freeze drying Methods 0.000 claims 1
- 239000000376 reactant Substances 0.000 claims 1
- 210000001035 gastrointestinal tract Anatomy 0.000 abstract description 13
- 230000000968 intestinal effect Effects 0.000 abstract description 12
- 230000004083 survival effect Effects 0.000 description 14
- 230000029087 digestion Effects 0.000 description 12
- 239000012530 fluid Substances 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 230000002496 gastric effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 241000872931 Myoporum sandwicense Species 0.000 description 2
- 239000002262 Schiff base Substances 0.000 description 2
- 150000004753 Schiff bases Chemical class 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 210000004051 gastric juice Anatomy 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 210000002784 stomach Anatomy 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 206010010774 Constipation Diseases 0.000 description 1
- 206010012735 Diarrhoea Diseases 0.000 description 1
- 102000010834 Extracellular Matrix Proteins Human genes 0.000 description 1
- 108010037362 Extracellular Matrix Proteins Proteins 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 108010019160 Pancreatin Proteins 0.000 description 1
- 102000057297 Pepsin A Human genes 0.000 description 1
- 108090000284 Pepsin A Proteins 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 229920006321 anionic cellulose Polymers 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 208000019425 cirrhosis of liver Diseases 0.000 description 1
- 230000006196 deacetylation Effects 0.000 description 1
- 238000003381 deacetylation reaction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000012137 double-staining Methods 0.000 description 1
- 201000006549 dyspepsia Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 210000002744 extracellular matrix Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 210000004211 gastric acid Anatomy 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036737 immune function Effects 0.000 description 1
- 208000033065 inborn errors of immunity Diseases 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 230000003871 intestinal function Effects 0.000 description 1
- 230000007413 intestinal health Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000015816 nutrient absorption Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229940055695 pancreatin Drugs 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229940111202 pepsin Drugs 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 230000010399 physical interaction Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 208000028529 primary immunodeficiency disease Diseases 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 230000001850 reproductive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229940126586 small molecule drug Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/74—Bacteria
- A61K35/741—Probiotics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/74—Bacteria
- A61K35/741—Probiotics
- A61K35/742—Spore-forming bacteria, e.g. Bacillus coagulans, Bacillus subtilis, clostridium or Lactobacillus sporogenes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/74—Bacteria
- A61K35/741—Probiotics
- A61K35/744—Lactic acid bacteria, e.g. enterococci, pediococci, lactococci, streptococci or leuconostocs
- A61K35/747—Lactobacilli, e.g. L. acidophilus or L. brevis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/38—Cellulose; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/06—Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/10—Laxatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/12—Antidiarrhoeals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/14—Prodigestives, e.g. acids, enzymes, appetite stimulants, antidyspeptics, tonics, antiflatulents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Pharmacology & Pharmacy (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Microbiology (AREA)
- Mycology (AREA)
- Epidemiology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Molecular Biology (AREA)
- Immunology (AREA)
- Inorganic Chemistry (AREA)
- Zoology (AREA)
- Nutrition Science (AREA)
- Gastroenterology & Hepatology (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Medicinal Preparation (AREA)
Abstract
本发明公开了双层水凝胶肠道递送载体及其应用,属于载体递送技术领域。所述双层水凝胶肠道递送载体由以下成分组成:交联的水凝胶基质,植入水凝胶基质内的载体基质,载体基质用于包封待递送的活性物质;所述水凝胶基质为羧基修饰的壳聚糖与氧化双醛多糖交联形成的CMCS‑PSDs;所述载体基质为羧甲基纤维素。所述双层水凝胶肠道递送载体在制备定向递送至肠道的制剂中的应用。本发明还公开了一种益生菌制剂,由双层水凝胶肠道递送载体和待递送的益生菌组成,益生菌包封在载体基质中。本发明还公开了益生菌制剂的制备方法。本发明的双层水凝胶肠道递送载体可以保护活性物质,使其顺利到达肠道,本发明对研究活性物质的定向递送具有重要意义。
Description
技术领域
本发明涉及双层水凝胶肠道递送载体及其应用,属于载体递送技术领域。
背景技术
益生菌,是通过定殖在人体内,改变宿主某一部位菌群组成的一类对宿主有益的活性微生物。通过调节宿主黏膜与系统免疫功能或通过调节肠道内菌群平衡,促进营养吸收保持肠道健康的作用,从而产生有利于健康作用的单微生物或组成明确的混合微生物。免疫力低下者、消化不良者、便秘患者、腹泻患者、肠道功能逐渐减弱的中老年人、化疗或者放射治疗的肿瘤患者、肝硬化以及腹腔炎患者等均需要补充益生菌。为使益生菌顺利通过胃到达肠道,有必要建立一种适合递送益生菌的包封体系。益生菌是具有繁殖能力的活体,相比于小分子药物,包埋有难度。
水凝胶因其独特的三维网络结构,能为活细胞提供一个可以注入营养素的水环境,允许细胞生长和感知。同时,也可以防止环境对细胞的危害。此外,水凝胶与天然细胞外基质相似,具有良好的生物安全性、生物相容性和生物降解性。因此,水凝胶可作为封装活性物质的理想材料。
羧基修饰的壳聚糖(CMCS)是壳聚糖的重要衍生物,保留了壳聚糖良好的生物相容性、生物降解性和安全性。此外,CMCS包含了阳离子和阴离子电荷,是具有pH响应性的两性聚电解质。CMCS上的羧基可以用于感应外界pH。CMCS上含有的活性氨基,可提供共价交联,形成稳定水凝胶。因此,CMCS可作为水凝胶保护载体的理想材料。氧化双醛多糖(PSDs)可作为安全交联剂,交联CMCS可形成稳定的凝胶。但是,壳聚糖具有抗菌活性,壳聚糖及其衍生物不能直接用于益生菌的递送。
羧甲基纤维素(CarboxymethylCellulose,CMC),属阴离子型纤维素醚类,外观为白色或微黄色絮状纤维粉末或白色粉末,无臭无味,无毒;易溶于冷水或热水,形成具有一定粘度的透明溶液。溶液为中性或微碱性,不溶于乙醇、乙醚、异丙醇、丙酮等有机溶剂,可溶于含水60%的乙醇或丙酮溶液。有吸湿性,对光热稳定,粘度随温度升高而降低,溶液在pH值2~10稳定,pH低于2有固体析出,pH值高于10粘度降低。CMC可作为粘合剂、增稠剂、悬浮剂、乳化剂、分散剂、稳定剂、上浆剂等。
发明内容
针对上述现有技术,本发明提供了一种适合于益生菌的双层水凝胶肠道递送载体,为pH响应性的水凝胶载体,不受胃液的影响,可顺利将益生菌递送至肠道。本发明还提供了双层水凝胶肠道递送载体在制备定向递送至肠道的制剂中的应用。本发明还提供了一种益生菌制剂。
本发明是通过以下技术方案实现的:
一种双层水凝胶肠道递送载体,由以下成分组成:交联的水凝胶基质,植入水凝胶基质内的载体基质,所述载体基质用于包封待递送的活性物质;
所述水凝胶基质,为羧基修饰的壳聚糖与氧化双醛多糖交联形成的CMCS-PSDs;
所述载体基质为羧甲基纤维素。
进一步地,所述氧化双醛多糖选自氧化海藻酸钠(ADA)。
进一步地,所述活性物质选自益生菌;更进一步地,所述益生菌选自植物乳杆菌(LP)、枯草芽孢杆菌(BS)等。
进一步地,所述CMCS是通过以下方法制备得到的:将20g壳聚糖溶于150mL异丙醇中,加入50mL的浓度为13.3mol/L的NaOH溶液,在60℃下溶胀碱化1h;然后加入100g的一氯乙酸(一氯乙酸溶于异丙醇中,30min内滴加完),60℃下反应4h;80%乙醇溶液(体积百分数)洗涤,真空干燥,得到CMCS。
进一步地,所述PSDs是通过以下方法制备得到的:向多糖溶液中加入适量高碘酸钠(NaIO4),在30℃下反应12h;添加乙二醇以淬灭多余的高碘酸钠,猝灭反应2h;去离子水透析反应物72h,透析液冷冻干燥,得到PSDs。所述多糖溶液的浓度为2%。所述多糖溶液的溶质选自玉米淀粉、马铃薯淀粉、果胶、葡聚糖、海藻酸钠中的任意一种。所述高碘酸钠的加入量为1.4%。
所述双层水凝胶肠道递送载体在制备定向递送至肠道的制剂中的应用。进一步地,所述制剂为益生菌制剂。
一种益生菌制剂,由双层水凝胶肠道递送载体和待递送的益生菌组成,益生菌包封在载体基质中。
进一步地,所述益生菌选自植物乳杆菌、枯草芽孢杆菌等。
所述益生菌制剂的制备方法,包括以下步骤:
(1)益生菌菌液离心分离得沉淀物,将沉淀物分散到羟甲基纤维素溶液中,所述羟甲基纤维素溶液的浓度为2.0%~3.0%,优选2.5%;
(2)加入PSDs溶液,混匀,得混合物;所述PSDs溶液的浓度为1.0%~3.0%,优选2.0%;所述羟甲基纤维素溶液与PSDs溶液的体积比为1:0.8~1.2,优选1:1;
(3)使用注射器和泵将上述混合物滴加到CMCS溶液中,即得;所述CMCS溶液的浓度为2.0%~5.0%,优选3.0%;所述混合物与CMCS溶液的体积比为1:0.8~1.2,优选1:1。
进一步地,所述步骤(1)中,益生菌菌液的浓度为1.0×107~1.0×109CFU/ml,优选1.0×108CFU/ml。
进一步地,所述步骤(1)中,益生菌菌液与羟甲基纤维素溶液的体积比为1.8~2.2:1,优选2:1。
本发明的双层水凝胶肠道递送载体,以NaIO4为氧化剂氧化天然多糖制备PSDs交联剂,PSDs与CMCS进行交联形成CMCS-PSDs水凝胶,即CMCS上的氨基与PSDs的醛基之间发生席夫碱反应(-C=N-)。此外,CMCS和PSDs链上含有大量-COOH、-OH、-NH3等官能团,大分子之间能够形成物理交联(氢键作用、静电作用等)。因此,CMCS和PSDs可以形成动态共价反应(化学交联)和非共价交联(物理交联)的双交联网络结构,稳定性更好(酸性条件下会破坏多糖的物理相互作用,但不会破坏席夫碱共价键)。
本发明的双层水凝胶肠道递送载体、益生菌制剂,是由维持整体结构的羧甲基壳聚糖外层和包裹益生菌并将其与羧甲基壳聚糖外层分离的羧甲基纤维素内层组成的双层系统,可保护益生菌使其顺利到达肠道:在胃中,外层分子通过表面的亲水基团迅速吸收周围水分形成“高分子-水分子”屏障,防止胃液渗入,同时,共价键和氢键通过协同作用形成的致密高分子网络可以防止益生菌释出,从而有效保护益生菌;到达肠道之后,部分氢键通过环境响应性转换成静电斥力,分别在外层和内层迅速形成微米级孔隙并逐步分解,实现益生菌的快速精准释放。
本发明的双层水凝胶肠道递送载体,可以保护活性物质(尤其是益生菌),使其顺利到达肠道,使活性物质可以更好地在机体内发挥有益作用,本发明对研究活性物质的定向递送具有重要意义。
本发明使用的各种术语和短语具有本领域技术人员公知的一般含义。
附图说明
图1:释放率结果示意图。
图2:存活率结果示意图。
图3:流失计数的结果示意图。
图4:释放率结果示意图。
图5:释放率结果示意图。
具体实施方式
下面结合实施例对本发明作进一步的说明。然而,本发明的范围并不限于下述实施例。本领域技术人员能够理解,在不背离本发明的精神和范围的前提下,可以对本发明进行各种变化和修饰。
下述实施例中所涉及的仪器、试剂、材料,若无特别说明,均为现有技术中已有的常规仪器、试剂、材料,可通过正规商业途径获得。下述实施例中所涉及的实验方法、检测方法等,若无特别说明,均为现有技术中已有的常规实验方法、检测方法。
本发明中涉及的百分数,若无特别说明,均指质量体积百分数,单位g/ml。
本发明所采用的壳聚糖,购买于麦克林,货号:C804726壳聚糖,脱乙酰度≥95%,粘度100~200mpa.s。
实施例1益生菌制剂的制备
步骤如下:
(1)将20g壳聚糖溶于150mL异丙醇中,加入50mL的浓度为13.3mol/L的NaOH溶液,在60℃下溶胀碱化1h;然后加入100g的一氯乙酸(30min内滴加完),60℃下反应4h;80%乙醇溶液(体积百分数)洗涤,真空干燥,得到CMCS。
(2)向1000ml多糖溶液(溶质为海藻酸钠,浓度2%)中加入14g高碘酸钠,在30℃下反应12h;添加10ml乙二醇以淬灭多余的高碘酸钠,猝灭反应2h;去离子水透析反应物72h,透析液冷冻干燥,得到PSDs。
(3)取10ml益生菌菌液(植物乳杆菌的悬浮液,浓度1.0×108CFU/ml),离心(3000rpm/min,10min)得沉淀物,将沉淀物分散到5ml羟甲基纤维素溶液中,羟甲基纤维素溶液的浓度为2.5%;
(4)加入5mlPSDs溶液,混匀,得混合物;PSDs溶液的浓度为2.0%;
(5)使用注射器和泵(流速为20mL/h)将上述混合物滴加到10mlCMCS溶液(浓度为3.0%)中,得载有植物乳杆菌的双层水凝胶肠道递送载体(CMCS-ADA-CMC保护的植物乳杆菌,SCHM),重量计为G。
用同样的方法,制备得到载有枯草芽孢杆菌的双层水凝胶肠道递送载体,与上述制备方法的不同之处在于:步骤(3)中的益生菌菌液为枯草芽孢杆菌的悬浮液,浓度1.0×108CFU/ml。
用同样的方法,制备得到空白载体,即不载益生菌的双层水凝胶肠道递送载体,与上述制备方法的不同之处在于:步骤(3)中不向羟甲基纤维素溶液中加入沉淀物。
实验1双层水凝胶肠道递送载体的释放率、存活率的检测
将1g胃蛋白酶加入到1L超纯水中,pH值调节至1.2,制备模拟胃液(SGF)。
将1g胰酶加入到1L磷酸二氢钾缓冲液(浓度0.05M)中,pH值调节至7.4,制备模拟肠液(SIF)。
(一)载有植物乳杆菌的双层水凝胶肠道递送载体
(1)释放率的检测
将实施例1制备的CMCS-ADA-CMC保护的植物乳杆菌(SCHM)在模拟胃液模拟消化(将1/10G的SCHM加入到10ml的模拟胃液中)2h,离心分离(3000rpm/min,10min),转入模拟肠液中模拟消化4h。在模拟消化过程中,以0.5h的间隔取出溶液(200μL)进行OD600的测定。
结果如图1所示。由1可见,SCHM在SGF中模拟消化2h的释放率仅为3.38%。在SIF中完全溶胀,载体破碎,LP几乎得到全部释放,在SIF中模拟消化4h的释放率为90.02%。
(2)存活率的检测
为了探究载体对益生菌的保护作用,观察LP在模拟胃肠道内的存活。将1ml游离的益生菌LP(UEP)(植物乳杆菌的悬浮液,浓度1.0×108CFU/ml)和1/10G的SCHM分别加入到10ml的模拟胃液中,模拟消化2h。然后转入到肠液中模拟消化2h。平板计数,每隔0.5h取样,离心(3000rpm/min,10min),弃掉上清,洗涤沉淀,复溶;取出溶液(100μL)铺在MRS琼脂上,于37℃孵育48h,计数。流式细胞仪,使用活细菌/死细菌双染试剂盒对模拟消化后的菌液进行染色,用流式细胞仪对LP进行计数。
结果如图2、图3所示。
由图2可知,游离的UEP在SGF中模拟消化1h,其存活率仅为3.24%;在SGF中模拟消化2h,其存活率降低到0.43%;将其转移到SIF中继续消化2h,LP的存活率为0.42%。结果表明,经过2h的SGF模拟消化,UEP几乎全部失活。
SCHM在SGF中模拟消化1h,其存活率高达89.53%,远大于UEP的3.24%;在SGF中模拟消化2h,其存活率为85.47%;将其转移到SIF中继续消化2h,SCHM的存活率为85.81%。结果表明,SCHM能显著提高LP模拟消化后的存活率,能显著保护LP不受SGF的影响。
图3的流式计数结果与涂板计数结果一致。
结论:本发明的双层水凝胶肠道递送载体能够保护益生菌不受胃酸影响,使其顺利达到肠道后释放。
(二)载有枯草芽孢杆菌的双层水凝胶肠道递送载体
释放率、存活率的检测方法同上。结果如图4、图5所示。
由图4可知,载体保护的BS(PBS)在SGF中模拟消化2h的释放率仅为3.91%。在SIF中,其释放率为86.50%。
由图5可知,游离的BS(FBS)经过体外消化后,其存活率仅为0.28%。PBS经过体外消化,其存活率高达93.6%。结果表明,PBS能显著保护BS不受SGF的影响。
给本领域技术人员提供上述实施例,以完全公开和描述如何实施和使用所主张的实施方案,而不是用于限制本文公开的范围。对于本领域技术人员而言显而易见的修饰将在所附权利要求的范围内。
Claims (10)
1.一种双层水凝胶肠道递送载体,其特征在于,由以下成分组成:交联的水凝胶基质,植入水凝胶基质内的载体基质,所述载体基质用于包封待递送的活性物质;
所述水凝胶基质,为羧基修饰的壳聚糖与氧化双醛多糖交联形成的CMCS-PSDs;
所述载体基质为羧甲基纤维素。
2.根据权利要求1所述的双层水凝胶肠道递送载体,其特征在于:所述活性物质选自益生菌;所述益生菌选自植物乳杆菌、枯草芽孢杆菌。
3.根据权利要求1所述的双层水凝胶肠道递送载体,其特征在于,所述CMCS是通过以下方法制备得到的:将20g壳聚糖溶于150mL异丙醇中,加入50mL的浓度为13.3mol/L的NaOH溶液,在60℃下溶胀碱化1h;然后加入100g的一氯乙酸,60℃下反应4h;80%乙醇溶液洗涤,真空干燥,得到CMCS。
4.根据权利要求1所述的双层水凝胶肠道递送载体,其特征在于,所述PSDs是通过以下方法制备得到的:向多糖溶液中加入高碘酸钠,在30℃下反应12h;添加乙二醇以淬灭多余的高碘酸钠,猝灭反应2h;去离子水透析反应物72h,透析液冷冻干燥,得到PSDs;所述多糖溶液的溶质选自玉米淀粉、马铃薯淀粉、果胶、葡聚糖、海藻酸钠中的任意一种。
5.权利要求1~4中任一项所述的双层水凝胶肠道递送载体在制备定向递送至肠道的制剂中的应用。
6.根据权利要求5所述的应用,其特征在于:所述制剂为益生菌制剂。
7.一种益生菌制剂,由权利要求1~4中任一项所述的双层水凝胶肠道递送载体和待递送的益生菌组成,益生菌包封在载体基质中。
8.根据权利要求7所述的益生菌制剂,其特征在于:所述益生菌选自植物乳杆菌、枯草芽孢杆菌。
9.权利要求7或8所述的益生菌制剂的制备方法,其特征在于,包括以下步骤:
(1)益生菌菌液离心分离得沉淀物,将沉淀物分散到羟甲基纤维素溶液中,所述羟甲基纤维素溶液的浓度为2.0%~3.0%;
(2)加入PSDs溶液,混匀,得混合物;所述PSDs溶液的浓度为1.0%~3.0%;所述羟甲基纤维素溶液与PSDs溶液的体积比为1:0.8~1.2;
(3)将上述混合物滴加到CMCS溶液中,即得;所述CMCS溶液的浓度为2.0%~5.0%;所述混合物与CMCS溶液的体积比为1:0.8~1.2。
10.根据权利要求9所述的益生菌制剂的制备方法,其特征在于:所述步骤(1)中,益生菌菌液的浓度为1.0×107~1.0×109CFU/ml;益生菌菌液与羟甲基纤维素溶液的体积比为1.8~2.2:1。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310403038.2A CN116392599B (zh) | 2023-04-17 | 2023-04-17 | 双层水凝胶肠道递送载体及其应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310403038.2A CN116392599B (zh) | 2023-04-17 | 2023-04-17 | 双层水凝胶肠道递送载体及其应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN116392599A true CN116392599A (zh) | 2023-07-07 |
CN116392599B CN116392599B (zh) | 2024-07-26 |
Family
ID=87019687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310403038.2A Active CN116392599B (zh) | 2023-04-17 | 2023-04-17 | 双层水凝胶肠道递送载体及其应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116392599B (zh) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106750398A (zh) * | 2016-11-25 | 2017-05-31 | 暨南大学 | 载药壳聚糖/海藻酸钠双重交联水凝胶及其制法和应用 |
CN108324680A (zh) * | 2018-03-21 | 2018-07-27 | 武汉理工大学 | 用作结肠靶向的多重响应性智能水凝胶及其制备方法 |
CN109821023A (zh) * | 2019-02-22 | 2019-05-31 | 江西光至金辉医疗制品有限公司 | 一种pH敏感型智能药物控制释放载体及其制备方法 |
CN111019162A (zh) * | 2019-11-08 | 2020-04-17 | 武汉理工大学 | 以氧化透明质酸为交联剂的壳聚糖多肽衍生物自交联水凝胶的制备方法及应用 |
US20200197301A1 (en) * | 2017-06-13 | 2020-06-25 | Pusan National University Industry-University Cooperation Foundation | Probiotics-delivering hydrogel formulation for protecting probiotics in acidic environment and composition for delivering probiotics comprising same |
CN113274369A (zh) * | 2021-04-29 | 2021-08-20 | 暨南大学 | 一种结肠靶向的口服益生菌微囊及其制备方法与应用 |
CN113577376A (zh) * | 2021-08-10 | 2021-11-02 | 四川大学 | 一种双重载药多糖基自愈合水凝胶及其制备方法 |
CN114230812A (zh) * | 2021-12-07 | 2022-03-25 | 广东省科学院健康医学研究所 | 一种功能性水凝胶及其制备方法和应用 |
CN115337272A (zh) * | 2022-07-15 | 2022-11-15 | 汕头大学 | 一种天然多糖基化学-物理双交联水凝胶微粒及其制备与应用 |
CN115737537A (zh) * | 2022-11-18 | 2023-03-07 | 平顶山学院 | 一种靶向缓释益生菌的载体水凝胶及其制备方法和应用 |
CN115844811A (zh) * | 2022-09-10 | 2023-03-28 | 中南民族大学 | 基于pva-gg的双层非均质微凝胶递送系统及其在制备治疗结肠炎药物中的应用 |
-
2023
- 2023-04-17 CN CN202310403038.2A patent/CN116392599B/zh active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106750398A (zh) * | 2016-11-25 | 2017-05-31 | 暨南大学 | 载药壳聚糖/海藻酸钠双重交联水凝胶及其制法和应用 |
US20200197301A1 (en) * | 2017-06-13 | 2020-06-25 | Pusan National University Industry-University Cooperation Foundation | Probiotics-delivering hydrogel formulation for protecting probiotics in acidic environment and composition for delivering probiotics comprising same |
CN108324680A (zh) * | 2018-03-21 | 2018-07-27 | 武汉理工大学 | 用作结肠靶向的多重响应性智能水凝胶及其制备方法 |
CN109821023A (zh) * | 2019-02-22 | 2019-05-31 | 江西光至金辉医疗制品有限公司 | 一种pH敏感型智能药物控制释放载体及其制备方法 |
CN111019162A (zh) * | 2019-11-08 | 2020-04-17 | 武汉理工大学 | 以氧化透明质酸为交联剂的壳聚糖多肽衍生物自交联水凝胶的制备方法及应用 |
CN113274369A (zh) * | 2021-04-29 | 2021-08-20 | 暨南大学 | 一种结肠靶向的口服益生菌微囊及其制备方法与应用 |
CN113577376A (zh) * | 2021-08-10 | 2021-11-02 | 四川大学 | 一种双重载药多糖基自愈合水凝胶及其制备方法 |
CN114230812A (zh) * | 2021-12-07 | 2022-03-25 | 广东省科学院健康医学研究所 | 一种功能性水凝胶及其制备方法和应用 |
CN115337272A (zh) * | 2022-07-15 | 2022-11-15 | 汕头大学 | 一种天然多糖基化学-物理双交联水凝胶微粒及其制备与应用 |
CN115844811A (zh) * | 2022-09-10 | 2023-03-28 | 中南民族大学 | 基于pva-gg的双层非均质微凝胶递送系统及其在制备治疗结肠炎药物中的应用 |
CN115737537A (zh) * | 2022-11-18 | 2023-03-07 | 平顶山学院 | 一种靶向缓释益生菌的载体水凝胶及其制备方法和应用 |
Non-Patent Citations (4)
Title |
---|
MENGMENG WANG等: "Preparation of pH-sensitive carboxymethyl cellulose/chitosan/alginate hydrogel beads with reticulated shell structure to deliver Bacillus subtilis natto", 《INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES》, vol. 192, 1 December 2021 (2021-12-01), pages 684 * |
WEN-CAN HUANG等: "A Double-Layer Polysaccharide Hydrogel (DPH) for the Enhanced Intestine-Targeted Oral Delivery of Probiotics", 《ENGINEERING》, 22 September 2023 (2023-09-22), pages 1 - 15 * |
候冰娜等: "自修复氧化海藻酸钠-羧甲基壳聚糖水凝胶的制备及药物缓释性能", 《复合材料学报》, vol. 39, no. 01, 18 May 2021 (2021-05-18), pages 1 * |
李云洁等: "软骨组织工程用羧甲基壳聚糖/氧化海藻酸钠复合水凝胶的制备及体外评估", 《华西口腔医学杂志》, vol. 37, no. 03, 1 June 2019 (2019-06-01), pages 253 - 259 * |
Also Published As
Publication number | Publication date |
---|---|
CN116392599B (zh) | 2024-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Ramdhan et al. | Physical and mechanical properties of alginate based composite gels | |
Pushpamalar et al. | Biodegradable polysaccharides for controlled drug delivery | |
Qi et al. | Alginate-based double-network hydrogel improves the viability of encapsulated probiotics during simulated sequential gastrointestinal digestion: Effect of biopolymer type and concentrations | |
Hovgaard et al. | Current applications of polysaccharides in colon targeting | |
Coviello et al. | Polysaccharide hydrogels for modified release formulations | |
CA2302585C (en) | Controlled release formulations | |
US20050226905A1 (en) | Biocompatible compositions as carriers or excipients for pharmaceutical and nutraceutical formulations and for food protection | |
CN100478032C (zh) | 一种可注射型pH及葡萄糖敏感水凝胶的制备方法 | |
CN108676177B (zh) | 一种以纳米淀粉粒子为骨架的智能水凝胶加工方法 | |
Liao et al. | Potential of lactic acid bacteria derived polysaccharides for the delivery and controlled release of oral probiotics | |
CA1146865A (en) | Agent for preventing or treating infections in human beings and animals | |
CN113577376A (zh) | 一种双重载药多糖基自愈合水凝胶及其制备方法 | |
CN113372578A (zh) | pH响应型羧甲基壳聚糖/海藻酸钠水凝胶球的制备方法 | |
CN104302674B (zh) | 包含天然或合成聚合物的凝胶状物质和生产该凝胶状物质的方法 | |
CN109908103B (zh) | 一种用于制备植物软胶囊的组合物 | |
CN104644612A (zh) | 聚丙烯酸钠接枝海藻酸钠包埋益生菌微胶囊及其制备方法 | |
CN112335884A (zh) | 一种新型益生菌微球及其制备方法 | |
Putro et al. | Polysaccharides gums in drug delivery systems: A review | |
Esmaeilzadeh et al. | Evaluation of the effect of psyllium on the viability of lactobacillus acidophilus in alginate-polyl lysine beads | |
Giri et al. | Natural polysaccharides: Types, basic structure and suitability for forming hydrogels | |
CN116392599B (zh) | 双层水凝胶肠道递送载体及其应用 | |
Patel Parul et al. | Bacteria aided biopolymers as carriers for colon specific drug delivery system: A Review | |
Arfin et al. | Alginate: recent progress and technological prospects | |
Abbasi et al. | Konjac glucomannan-based nanomaterials in drug delivery and biomedical applications | |
Kojić et al. | Microbial polysaccharides: between oil wells, food and drugs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |