CN115068336A - 一种基于液滴微流控的肠道菌群包埋工艺 - Google Patents
一种基于液滴微流控的肠道菌群包埋工艺 Download PDFInfo
- Publication number
- CN115068336A CN115068336A CN202210682131.7A CN202210682131A CN115068336A CN 115068336 A CN115068336 A CN 115068336A CN 202210682131 A CN202210682131 A CN 202210682131A CN 115068336 A CN115068336 A CN 115068336A
- Authority
- CN
- China
- Prior art keywords
- capillary tube
- solution
- intestinal flora
- embedding process
- continuous phase
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000000968 intestinal effect Effects 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 20
- 239000003094 microcapsule Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 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 abstract description 25
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 25
- 239000000661 sodium alginate Substances 0.000 claims abstract description 25
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 25
- 241001052560 Thallis Species 0.000 claims abstract description 7
- 235000010410 calcium alginate Nutrition 0.000 claims abstract description 6
- 239000000648 calcium alginate Substances 0.000 claims abstract description 6
- 229960002681 calcium alginate Drugs 0.000 claims abstract description 6
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 40
- 230000001580 bacterial effect Effects 0.000 claims description 15
- 239000000725 suspension Substances 0.000 claims description 7
- 239000003223 protective agent Substances 0.000 claims description 6
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 claims description 4
- 239000002285 corn oil Substances 0.000 claims description 4
- 235000005687 corn oil Nutrition 0.000 claims description 4
- 239000000787 lecithin Substances 0.000 claims description 4
- 235000010445 lecithin Nutrition 0.000 claims description 4
- 229940067606 lecithin Drugs 0.000 claims description 4
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
- 229930006000 Sucrose Natural products 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 235000019198 oils Nutrition 0.000 claims description 3
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 3
- 229920000053 polysorbate 80 Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000005720 sucrose Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 244000005709 gut microbiome Species 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 13
- 241000894006 Bacteria Species 0.000 description 12
- 239000002245 particle Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000002550 fecal effect Effects 0.000 description 6
- 210000001035 gastrointestinal tract Anatomy 0.000 description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 239000007850 fluorescent dye Substances 0.000 description 5
- 239000001110 calcium chloride Substances 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- 235000011148 calcium chloride Nutrition 0.000 description 4
- 239000002775 capsule Substances 0.000 description 4
- 229940100691 oral capsule Drugs 0.000 description 4
- 239000006041 probiotic Substances 0.000 description 4
- 235000018291 probiotics Nutrition 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000000529 probiotic effect Effects 0.000 description 3
- 238000002054 transplantation Methods 0.000 description 3
- 208000037384 Clostridium Infections Diseases 0.000 description 2
- 206010009657 Clostridium difficile colitis Diseases 0.000 description 2
- 206010054236 Clostridium difficile infection Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001079 digestive effect Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002073 fluorescence micrograph Methods 0.000 description 2
- 210000004051 gastric juice Anatomy 0.000 description 2
- 238000012837 microfluidics method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 210000002784 stomach Anatomy 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010011732 Cyst Diseases 0.000 description 1
- 208000036649 Dysbacteriosis Diseases 0.000 description 1
- 208000027244 Dysbiosis Diseases 0.000 description 1
- 241000792859 Enema Species 0.000 description 1
- 241000194029 Enterococcus hirae Species 0.000 description 1
- 239000003833 bile salt Substances 0.000 description 1
- 239000004227 calcium gluconate Substances 0.000 description 1
- 235000013927 calcium gluconate Nutrition 0.000 description 1
- 229960004494 calcium gluconate Drugs 0.000 description 1
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 208000031513 cyst Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007140 dysbiosis Effects 0.000 description 1
- 239000007920 enema Substances 0.000 description 1
- 229940095399 enema Drugs 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 210000004211 gastric acid Anatomy 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000009777 vacuum freeze-drying Methods 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
- A61J3/07—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use
- A61J3/078—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use into the form of wafers or cachets
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/015—Inorganic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/03—Organic compounds
- A23L29/035—Organic compounds containing oxygen as heteroatom
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/20—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents
- A23L29/206—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of vegetable origin
- A23L29/256—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of vegetable origin from seaweeds, e.g. alginates, agar or carrageenan
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/135—Bacteria or derivatives thereof, e.g. probiotics
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P10/00—Shaping or working of foodstuffs characterised by the products
- A23P10/30—Encapsulation of particles, e.g. foodstuff additives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
- A61J3/07—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use
-
- 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
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5036—Polysaccharides, e.g. gums, alginate; Cyclodextrin
-
- 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
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5089—Processes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/04—Antibacterial agents
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Pharmacology & Pharmacy (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Nutrition Science (AREA)
- Mycology (AREA)
- Epidemiology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Oncology (AREA)
- Communicable Diseases (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Dispersion Chemistry (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
本发明是一种基于液滴微流控的肠道菌群包埋工艺,该工艺通过第一毛细管穿过T型三通,第一毛细管一端连接注射器用于输送分散相;连续相第二毛细管经T型三通上方注入,从第三毛细管流出;第一、第三毛细管共同形成共轴流液滴生成结构,生成的液滴通入CaCl2溶液中;包裹有菌体的海藻酸钠微液滴通入不断搅拌中的CaCl2溶液中形成海藻酸钙微胶囊。本发明通过控制微通道结构和连续相、分散相两相流速来控制液滴的生成,分散相在两相交界处通过界面张力和剪切力的作用生成液滴,以微液滴的形式分散于连续相中,生成的液滴通过毛细管通入CaCl2溶液中,形成微胶囊。微胶囊粒径可控、均一度好,而且结构稳定,形态良好。
Description
技术领域
本发明涉及肠道菌群处理的领域,特别涉及一种基于液滴微流控的肠道菌群包埋工艺。
背景技术
在2013年时,菌群移植(FMT)技术就被列入美国临床医学指南以用于治疗复发性难辨梭状芽孢杆菌感染(CDI)。近年来,随着利用菌群移植治疗菌群失调引起的相关性疾病的临床证据不断增加,这种治疗方式已经成为全球临床医学、微生物学和转化医学的研究热点。
目前临床上常用的菌群移植方式有口服胶囊和菌液(上消化道-鼻肠管,下消化道-结肠镜,灌肠)两种。对于患者而言,相较于需要侵入式置管的菌液,简单便捷舒适度更高的口服胶囊无疑更容易被接受。
然而,不同于置管侵入直达肠道的菌液,口服胶囊会通过消化道,先经过胃部再到达肠道。在口服胶囊停留在胃部的过程中,胃液会对胶囊外壳造成腐蚀,使得胶囊外壳破损,菌群暴露在胃液中,这将导致大量菌群失活,极大程度的影响口服胶囊的治疗效果。
将菌群进行包埋就是该难题的解决方案之一。目前最常用的包埋壁材为海藻酸钠和氯化钙——利用海藻酸钠和氯化钙接触反应生成海藻酸钙包覆菌体形成包埋体。如专利申请202110489741.0公开的具备改善肠道功能的包埋益生菌微囊的制备方法,第一步称取海藻酸钠放入水中同时加入益生菌菌体得到凝胶液,第二步在凝胶液加入橄榄油与白醋后形成胶体液,第三步在胶体液内加入的葡萄糖酸钙溶液制成微囊,第四步将微囊置于真空冷冻干燥机中形成冻干微囊,第五步将步骤四中等到的冻干微粉包装成药剂。该具备改善肠道功能的包埋益生菌微囊的制备方法,选取的原料是海藻酸钠绿色纯天然没有副作用,将益生菌更好的在肠道释放,微囊可以抵抗胃酸和胆盐的侵蚀,并在肠道中释放,有调节肠道菌群的结构,改善肠道的微环境,从而改善了人体肠道功能,达到润肠通便的效果。
现有的利用海藻酸钠壁材进行包埋的工艺现有喷雾干燥法、内源乳化法、外源乳化法等。然而这些工艺都存在有明显的缺陷,它们包埋形成的微球粒径分布广,大小不均一,亦或是包埋工艺会对菌群活性造成影响等。
发明内容
为解决上述问题,本发明的首要目的是提供一种基于液滴微流控的肠道菌群包埋工艺,该工艺利用液滴微流控技术可以批量制备粒径可控、均一度好、结构稳定的微液滴,克服现有海藻酸钠包埋的缺陷。
发明人研究发现:液滴微流控是最近兴起的一种利用互不相溶的两相液体产生分散的微液滴进行实验操作的非连续流微流控技术。该技术通过控制微通道结构和两相流速来控制液滴的生成。在固定体积流率的驱动泵的推动下,连续相和分散相分别进入不同的微通道,当两相流体在交界点处相遇后,分散相在界面张力和剪切力的作用下生成液滴,以微液滴的形式分散于连续相中。
由此,利用液滴微流控技术可以批量制备粒径可控、均一度好、结构稳定的微液滴。这些液滴所具有的性质与微胶囊的要求相近,因此,可以利用液滴微流控技术进行菌群包埋。
为实现上述目的,本发明采用的技术方案是:
一种基于液滴微流控的肠道菌群包埋工艺,该工艺通过第一毛细管穿过T型三通,第一毛细管一端连接注射器用于输送分散相,第一毛细管另一端插入第三毛细管内;连续相第二毛细管经T型三通上方注入,从第三毛细管流出;第一、第三毛细管共同形成共轴流液滴生成结构,生成的液滴通入CaCl2溶液中;包裹有菌体的海藻酸钠微液滴通入不断搅拌中的CaCl2溶液中形成海藻酸钙微胶囊;
其中,连续相为玉米油;分散相包含有肠道菌群液、保护剂和海藻酸钠溶液,连续相流速和分散相流速按照6:1的比例进行控制。
本发明控制微通道结构和连续相、分散相两相流速来控制液滴的生成,在T型三通下,连续相和分散相分别进入不同的微通道,当两相流体在交界点处相遇后,分散相在界面张力和剪切力的作用下生成液滴,以微液滴的形式分散于连续相中,生成的液滴通过毛细管通入CaCl2溶液中,形成微胶囊。这些液滴是在剪切力和界面张力作用下形成的,通过精准控制两相流速,生成的液滴粒径可控、均一度好,而且结构稳定。
进一步,连续相中,还含有2wt.%卵磷脂,卵磷脂作为乳化剂。
进一步,分散相中,肠道菌群液为5*1010cfu/mL的菌悬液,保护剂为5%的蔗糖,海藻酸钠溶液为2-2.5wt.%,其中,菌悬液:海藻酸钠溶液=1:2。
进一步,CaCl2溶液通过烧杯置于磁力搅拌器上,以200rpm的速度不断搅拌。
更进一步,连续相和分散相均使用5mL注射器、精密注射泵输送,连续相流速Qc为18μL/min,分散相流速Qd为3μL/min。
进一步,在海藻酸钠微液滴全部通入CaCl2溶液中形成微胶囊后再搅拌半小时对微胶囊进行固化。
更进一步,固化后的微胶囊用300目的滤网过滤出微胶囊,并用1%的吐温80溶液洗涤去除油相,即可得到海藻酸钠包埋的肠道菌群微胶囊。
所述第一毛细管,内径100μm,外径360μm。
所述第二毛细管,内径100μm,外径360μm。
所述第三毛细管,内径500μm,外径690μm。
第一毛细管和第二毛细管保持一致,以便于控制连续相和分散相的流速。
本发明通过控制微通道结构和连续相、分散相两相流速来控制液滴的生成,分散相在两相交界处通过界面张力和剪切力的作用生成液滴,以微液滴的形式分散于连续相中,生成的液滴通过毛细管通入CaCl2溶液中,形成微胶囊。微胶囊粒径可控、均一度好,而且结构稳定,形态良好。
且该方法包埋率高,对菌体活性无明显影响。
附图说明
图1为本发明的包埋仪器示意图。
图2为本发明的微胶囊光学显微镜图。
图3为本发明的微胶囊粒径分布图。
图4为本发明的单菌微胶囊死活染色荧光图。
图5为本发明的粪菌微胶囊死活染色荧光图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
图1所示,本发明所使用的包埋仪器。图中所示,内径100μm,外径360μm的第一毛细管1穿过T型三通2,第一毛细管1一端连接注射器用于输送分散相,第一毛细管1另一端插入内径500μm,外径690μm的第三毛细管4内;连续相经第二毛细管3、T型三通2上方注入,从内径500μm的第三毛细管4流出;两根毛细管1、4共同形成共轴流液滴5生成结构。生成的液滴5通入装有CaCl2溶液的烧杯6中。装有CaCl2溶液的烧杯6置于磁力搅拌器8上,以200rpm的速度不断搅拌,生成凝胶化的液滴7,这些凝胶化的液滴7海藻酸钙微胶囊。
包埋过程:
配置好的连续相和分散相均使用5mL注射器、精密注射泵输送,其中,连续相流速Qc为18μL/min,分散相流速Qd为3μL/min。包裹有菌体的海藻酸钠微液滴通入不断搅拌中的CaCl2溶液中形成海藻酸钙微胶囊。在海藻酸钠微液滴全部通入CaCl2溶液中形成微胶囊后再搅拌半小时对微胶囊进行固化。然后,用300目的滤网过滤出微胶囊,并用1%的吐温80溶液洗涤去除油相,收集微胶囊并置于4℃恒温保藏。
实验流程:
实验目的:
利用液滴微流控技术结合海藻酸钠包埋肠道菌群。
实验材料:
LIVE/DEADTM BacLightTM Bacterial Viability Kit死活荧光染料、玉米油;卵磷脂;海藻酸钠;氯化钙;超纯水、柠檬酸钠。
实验仪器:
Harvard Pump 11Pico Plus Elite注射泵(Harvard Apparatus,Holliston,USA)、磁力搅拌器、粪便分析前处理仪及其耗材。
实验耗材:
弹性石英毛细管(100μm i.d.,360μm o.d.;500μm i.d.,690μm o.d.,永年锐沣色谱器件有限公司,中国河北);T型三通多端口连接器(IDEX Health&Science,USA);5mL注射器。
成分配置:
粪菌菌悬液:经粪便分析前处理仪处理提取的菌悬液。
单菌菌悬液:海氏肠球菌TG-056。
分散相:菌液+保护剂+2.5wt.%海藻酸钠的混合溶液(其中,菌液为5*1010的菌悬液,保护剂为5%的蔗糖,菌液:2.5wt.%海藻酸钠溶液=1:2)。
连续相:2wt.%卵磷脂的玉米油,卵磷脂作为乳化剂。
解囊液:0.2M柠檬酸钠溶液。
氯化钙溶液:1%CaCl2溶液。
实验结果:
单菌包埋:
1.液滴微流控法微胶囊粒径分布。
通过光学显微镜镜检观测,液滴微流控法包埋的微胶囊外观形态良好,球形度高(图2所示),不会出现畸形微胶囊。且微胶囊粒径分布均一性好,粒径集中在99±1μm范围内,如图3所示。
2.液滴微流控法对包埋活性的影响。
利用LIVE/DEADTM BacLightTM Bacterial Viability Kit死活荧光染料对微胶囊进行染色,再利用荧光显微镜进行镜检观察。
图4显示,微胶囊内几乎无红光,说明微胶囊内部死菌量极少,证明该包埋工艺对微胶囊活性几乎无影响。
3.液滴微流控法包埋率。
将单菌微胶囊利用解囊液解囊后,用LIVE/DEADTM BacLightTM BacterialViability Kit死活荧光染料进行染色,并利用流式细胞仪检测活性。按下列公式计算包埋率:
包埋率=包埋后总活菌数/包埋前总活菌数
经检测计算得,液滴微流控法包埋率为98%。
粪菌包埋:
1.菌群包埋镜检:利用LIVE/DEADTM BacLightTM Bacterial Viability Kit死活荧光染料对微胶囊进行染色,再利用荧光显微镜进行镜检观察。
图5显示,微胶囊外观形态完整,且内部菌群分布均匀。
2.液滴微流控法包埋率
将粪菌微胶囊利用解囊液解囊后,用LIVE/DEADTM BacLightTM BacterialViability Kit死活荧光染料进行染色,并利用流式细胞仪检测活性。按下列公式计算包埋率:
包埋率=包埋后总活菌数/包埋前总活菌数
经检测计算得,液滴微流控法包埋率为87%。
实验结果证明,液滴微流控包埋法既能用于包埋单一菌株也能用于包埋粪菌菌群。该技术适用性广,效果优异。包埋微胶囊经显微镜观测及流式细胞仪检测结果表明,液滴微流控法包埋出的微胶囊大小均一,形态良好,且该方法包埋率高,对菌体活性无明显影响。
以上仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (8)
1.一种基于液滴微流控的肠道菌群包埋工艺,其特征在于该工艺通过第一毛细管穿过T型三通,第一毛细管一端连接注射器用于输送分散相,第一毛细管另一端插入第三毛细管内;连续相第二毛细管经T型三通上方注入,从第三毛细管流出;第一、第三毛细管共同形成共轴流液滴生成结构,生成的液滴通入CaCl2溶液中;包裹有菌体的海藻酸钠微液滴通入不断搅拌中的CaCl2溶液中形成海藻酸钙微胶囊;
其中,连续相为玉米油;分散相包含有肠道菌群液、保护剂和海藻酸钠溶液,连续相流速和分散相流速按照6:1的比例进行控制。
2.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于连续相中,含有2wt.%卵磷脂。
3.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于分散相中,肠道菌群液为5*1010cfu/mL的菌悬液,保护剂为5%的蔗糖,海藻酸钠溶液为2-2.5wt.%,其中,菌悬液:海藻酸钠溶液=1:2。
4.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于CaCl2溶液通过烧杯置于磁力搅拌器上,以200rpm的速度不断搅拌。
5.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于连续相和分散相均使用5mL注射器、精密注射泵输送,连续相流速Qc为18μL/min,分散相流速Qd为3μL/min。
6.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于在海藻酸钠微液滴全部通入CaCl2溶液中形成微胶囊后再搅拌半小时对微胶囊进行固化。
7.根据权利要求6所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于固化后的微胶囊用300目的滤网过滤出微胶囊,并用1%的吐温80溶液洗涤去除油相,即可得到海藻酸钠包埋的肠道菌群微胶囊。
8.根据权利要求1所述的基于液滴微流控的肠道菌群包埋工艺,其特征在于所述第一毛细管,内径100μm,外径360μm;所述第二毛细管,内径100μm,外径360μm;所述第三毛细管,内径500μm,外径690μm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210682131.7A CN115068336A (zh) | 2022-06-15 | 2022-06-15 | 一种基于液滴微流控的肠道菌群包埋工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210682131.7A CN115068336A (zh) | 2022-06-15 | 2022-06-15 | 一种基于液滴微流控的肠道菌群包埋工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115068336A true CN115068336A (zh) | 2022-09-20 |
Family
ID=83253700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210682131.7A Pending CN115068336A (zh) | 2022-06-15 | 2022-06-15 | 一种基于液滴微流控的肠道菌群包埋工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115068336A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116237095A (zh) * | 2023-02-18 | 2023-06-09 | 四川大学 | 基于浸润原理可控制备单分散乳液的微流控方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101695646A (zh) * | 2009-10-28 | 2010-04-21 | 中国海洋大学 | 一种粒径均一的凝胶微球的制备装置和方法 |
CN102895927A (zh) * | 2012-10-23 | 2013-01-30 | 中国科学技术大学 | 粒径可控的单分散聚乙烯醇凝胶微球及其制备方法和所用装置 |
CN102935070A (zh) * | 2012-10-31 | 2013-02-20 | 武汉理工大学 | 利用微通道制备超分子水凝胶药物控释微粒的方法 |
CN103848996A (zh) * | 2012-12-09 | 2014-06-11 | 湖北文理学院 | 尺寸均一的魔芋葡甘聚糖微球的制备 |
CN104829850A (zh) * | 2015-04-14 | 2015-08-12 | 华中科技大学 | 一种球形海藻酸钙凝胶微粒的制备方法 |
CN104936682A (zh) * | 2012-10-26 | 2015-09-23 | 牛津纳米孔技术公司 | 微滴界面 |
CN106589412A (zh) * | 2016-11-28 | 2017-04-26 | 华南理工大学 | 一种基于微流控技术的聚合物微凝胶的制备方法 |
CN108927231A (zh) * | 2018-07-17 | 2018-12-04 | 王晓飞 | 基于大孔灌流微球的多通道液滴生成装置和方法 |
CN216367909U (zh) * | 2021-12-03 | 2022-04-26 | 四川大川合颐生物科技有限公司 | 基于微流控芯片的微球生产装置 |
CN114403290A (zh) * | 2022-01-28 | 2022-04-29 | 青岛诺安百特生物技术有限公司 | 一种噬菌体微胶囊及其制备方法 |
-
2022
- 2022-06-15 CN CN202210682131.7A patent/CN115068336A/zh active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101695646A (zh) * | 2009-10-28 | 2010-04-21 | 中国海洋大学 | 一种粒径均一的凝胶微球的制备装置和方法 |
CN102895927A (zh) * | 2012-10-23 | 2013-01-30 | 中国科学技术大学 | 粒径可控的单分散聚乙烯醇凝胶微球及其制备方法和所用装置 |
CN104936682A (zh) * | 2012-10-26 | 2015-09-23 | 牛津纳米孔技术公司 | 微滴界面 |
US20150285781A1 (en) * | 2012-10-26 | 2015-10-08 | Oxford Nanopore Technologies Ltd. | Droplet interfaces |
CN102935070A (zh) * | 2012-10-31 | 2013-02-20 | 武汉理工大学 | 利用微通道制备超分子水凝胶药物控释微粒的方法 |
CN103848996A (zh) * | 2012-12-09 | 2014-06-11 | 湖北文理学院 | 尺寸均一的魔芋葡甘聚糖微球的制备 |
CN104829850A (zh) * | 2015-04-14 | 2015-08-12 | 华中科技大学 | 一种球形海藻酸钙凝胶微粒的制备方法 |
CN106589412A (zh) * | 2016-11-28 | 2017-04-26 | 华南理工大学 | 一种基于微流控技术的聚合物微凝胶的制备方法 |
CN108927231A (zh) * | 2018-07-17 | 2018-12-04 | 王晓飞 | 基于大孔灌流微球的多通道液滴生成装置和方法 |
CN216367909U (zh) * | 2021-12-03 | 2022-04-26 | 四川大川合颐生物科技有限公司 | 基于微流控芯片的微球生产装置 |
CN114403290A (zh) * | 2022-01-28 | 2022-04-29 | 青岛诺安百特生物技术有限公司 | 一种噬菌体微胶囊及其制备方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116237095A (zh) * | 2023-02-18 | 2023-06-09 | 四川大学 | 基于浸润原理可控制备单分散乳液的微流控方法 |
CN116237095B (zh) * | 2023-02-18 | 2024-06-04 | 四川大学 | 基于浸润原理可控制备单分散乳液的微流控方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Zhao et al. | Biomimetic intestinal barrier based on microfluidic encapsulated sucralfate microcapsules | |
Koch et al. | Alginate encapsulation of genetically engineered mammalian cells: comparison of production devices, methods and microcapsule characteristics | |
Liu et al. | Preparation of monodisperse calcium alginate microcapsules via internal gelation in microfluidic-generated double emulsions | |
CN107376008B (zh) | 一种无机纳米颗粒-明胶核壳结构复合材料颗粒的制备方法 | |
Gao et al. | Recent advances in microfluidic-aided chitosan-based multifunctional materials for biomedical applications | |
Tang et al. | Designable dual-power micromotors fabricated from a biocompatible gas-shearing strategy | |
Ouyang et al. | Artificial cell microcapsule for oral delivery of live bacterial cells for therapy: design, preparation, and in-vitro characterization | |
ES2902551T3 (es) | Métodos de encapsulación y microcápsulas producidas mediante los mismos | |
CN107997179A (zh) | 一种乳酸菌微胶囊的制备方法 | |
CN105980043A (zh) | 稳定化的全水乳液及其制备和使用方法 | |
CN113975250A (zh) | 一种具有核壳结构的双水相多孔胰岛微胶囊的制备及应用 | |
CN115068336A (zh) | 一种基于液滴微流控的肠道菌群包埋工艺 | |
Silva et al. | Development of innovative medical devices by dispersing fatty acid eutectic blend on gauzes using supercritical particle generation processes | |
CN108371708A (zh) | 一种口服胰岛素纳米颗粒制剂及其制备方法 | |
CN103584081A (zh) | 一种沙棘油微胶囊的制备方法 | |
CN107158382A (zh) | 基于空心普鲁士蓝的热刺激响应型药物释放纳米载体及其制备方法 | |
CN109497555A (zh) | 一种槐糖微胶囊及其制备方法和应用 | |
Qu et al. | Aqueous two-phase droplet-templated colloidosomes composed of self-formed particles via spatial confined biomineralization | |
WO2020060275A1 (ko) | 나노버블과 약물이 함유된 약물담지체를 활용한 초음파 유도 약물전달 시스템 | |
Wang et al. | Preparation of core-shell microcapsules based on microfluidic technology for the encapsulation, protection and controlled delivery of phycocyanin | |
CN109589885A (zh) | 一种单分散性含油海藻酸钙微囊的制备方法 | |
CN108905914B (zh) | 一步法制备生物相容油核微囊及其应用 | |
CN112522176B (zh) | 组合物、细胞微囊化试剂盒和微囊化的单细胞的制备方法 | |
CN111450077B (zh) | 一种用于将营养物质/药物运送到小肠并缓释的毫米级多核胶囊及其制备方法和应用 | |
WO2012099482A2 (en) | Device, method and system for preparing microcapsules |
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 |