CN108929387A - 一种壳聚糖-g-抗菌肽聚合物的制备方法 - Google Patents
一种壳聚糖-g-抗菌肽聚合物的制备方法 Download PDFInfo
- Publication number
- CN108929387A CN108929387A CN201810893651.6A CN201810893651A CN108929387A CN 108929387 A CN108929387 A CN 108929387A CN 201810893651 A CN201810893651 A CN 201810893651A CN 108929387 A CN108929387 A CN 108929387A
- Authority
- CN
- China
- Prior art keywords
- chitosan
- antibacterial peptide
- peptide polymer
- carboxylic acid
- acid anhydrides
- 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
- 239000003910 polypeptide antibiotic agent Substances 0.000 title claims abstract description 38
- 229920000642 polymer Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920001661 Chitosan Polymers 0.000 claims abstract description 19
- 150000001413 amino acids Chemical class 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 12
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 3
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 claims description 15
- 239000004472 Lysine Substances 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 125000001584 benzyloxycarbonyl group Chemical group C(=O)(OCC1=CC=CC=C1)* 0.000 claims description 8
- UCPYLLCMEDAXFR-UHFFFAOYSA-N triphosgene Chemical compound ClC(Cl)(Cl)OC(=O)OC(Cl)(Cl)Cl UCPYLLCMEDAXFR-UHFFFAOYSA-N 0.000 claims description 8
- KZSNJWFQEVHDMF-UHFFFAOYSA-N Valine Natural products CC(C)C(N)C(O)=O KZSNJWFQEVHDMF-UHFFFAOYSA-N 0.000 claims description 7
- 239000004474 valine Substances 0.000 claims description 7
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000502 dialysis Methods 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 16
- 230000002401 inhibitory effect Effects 0.000 abstract description 8
- 230000007935 neutral effect Effects 0.000 abstract description 8
- 238000010189 synthetic method Methods 0.000 abstract description 4
- 230000000845 anti-microbial effect Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 108090000765 processed proteins & peptides Proteins 0.000 abstract description 2
- 238000007151 ring opening polymerisation reaction Methods 0.000 abstract description 2
- 229920001184 polypeptide Polymers 0.000 abstract 1
- 102000004196 processed proteins & peptides Human genes 0.000 abstract 1
- 241000894006 Bacteria Species 0.000 description 14
- 239000000047 product Substances 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 241000588724 Escherichia coli Species 0.000 description 7
- 230000001580 bacterial effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- 238000013019 agitation Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000002609 medium Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000003242 anti bacterial agent Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920001817 Agar Polymers 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 239000008272 agar Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- 235000010633 broth Nutrition 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010511 deprotection reaction Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000004108 freeze drying Methods 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical class CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 206010059866 Drug resistance Diseases 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000003862 amino acid derivatives Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- -1 cation amino acid Chemical class 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000003013 cytotoxicity Effects 0.000 description 1
- 231100000135 cytotoxicity Toxicity 0.000 description 1
- 230000006196 deacetylation Effects 0.000 description 1
- 238000003381 deacetylation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- BSCHIACBONPEOB-UHFFFAOYSA-N oxolane;hydrate Chemical compound O.C1CCOC1 BSCHIACBONPEOB-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000002987 valine group Chemical group [H]N([H])C([H])(C(*)=O)C([H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/74—Synthetic polymeric materials
- A61K31/785—Polymers containing nitrogen
-
- 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
- A61K47/50—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/56—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
- A61K47/61—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 the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule the organic macromolecular compound being a polysaccharide or a derivative thereof
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Communicable Diseases (AREA)
- Oncology (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
本发明公开了一种新型的壳聚糖‑g‑抗菌肽聚合物的制备方法,其制备方法包括以下步骤:首先合成赖氨酸‑N‑羧酸酐和缬氨酸‑N‑羧酸酐两种氨基酸衍生物,然后以壳聚糖为主链,将赖氨酸‑N‑羧酸酐和缬氨酸‑N‑羧酸酐通过开环聚合形成的多肽链接枝到壳聚糖的氨基上,制备出壳聚糖‑g‑抗菌肽聚合物;本发明制备的壳聚糖‑g‑抗菌肽聚合物在中性介质中具有最低抑菌浓度低、最低杀菌浓度低的优点;同时此聚合物合成方法简单,合成原料成本低,易于实现大规模生产,尤其是其在中性介质中的抗菌性能使得其在抗菌领域具有很高的潜在应用价值。
Description
技术领域
本发明属于抗菌性生物材料的制备技术领域,具体涉及新型的壳聚糖-g-抗菌肽聚合物的制备方法。
背景技术
近年来耐药性细菌甚至超级细菌的出现,迫使人类亟需研制新型抗菌剂用于面对此严峻挑战。与常规抗生素作用机制不同,天然抗菌肽通过破坏细菌细胞膜的方式实现其抗菌作用。由于其仅通过静电相互作用以及亲疏水相互作用杀灭细菌,这使得细菌难以产生耐药性。虽然天然抗菌肽有这一优点,但是由于生产成本高、稳定性差、细胞毒性高等缺点,限制了其在临床上的实际应用。
天然抗菌肽一般具有两个显著结构特征:表面两亲性和阳离子电荷。许多研究人员尝试采用人工合成的方法模拟天然抗菌肽结构,合成出一系列的阳离子氨基酸聚合物,此类抗菌肽与天然抗菌肽具有相似的性质。
壳聚糖是由自然界广泛存在的甲壳素经过脱乙酰作用得到的天然聚合物。近年来,由于其在生物医学方面应用的多样性,引起了科研工作者的广泛关注。特别是,壳聚糖作为一种抗菌剂已经被广泛报道。具有质子化铵的壳聚糖与细菌带负电荷的细胞膜作用,吸附和聚沉细菌,同时穿透细胞壁进入细胞内,扰乱细菌的新陈代谢而具有抗菌作用。
本发明中制备的壳聚糖-g-抗菌肽聚合物,以壳聚糖为主链,接枝赖氨酸和缬氨酸共聚物。赖氨酸是亲水性最强的氨基酸之一,同时带有正电荷,易与细菌表面负电荷结合;缬氨酸是疏水性最强的氨基酸之一,赖氨酸与缬氨酸的共聚形成两亲性链段。以壳聚糖为主链增加了抗菌肽的稳定性,同时壳聚糖与抗菌肽两种抗菌剂协同作用,在中性介质中对大肠杆菌具有良好的杀菌抑菌作用。
发明内容
本发明公开了一种新型的壳聚糖-g-抗菌肽聚合物的制备方法。该聚合物以壳聚糖为主链,以赖氨酸和缬氨酸共聚物为支链的接枝共聚物。本发明制备的壳聚糖-g-抗菌肽聚合物具有在中性水中最低抑菌浓度低、最低杀菌浓度低的优点;同时此聚合物合成方法简单,合成原料成本低,易于实现大规模生产,尤其是其在中性介质中的抗菌性能使得其在抗菌领域具有很高的潜在应用价值。
本发明的技术方案:壳聚糖-g-抗菌肽聚合物合成方法分为两步:第一步为两种氨基酸衍生物的合成;第二步为通过NCA-ROP(N-carboxyanhydride ring-openingpolymerization)反应两种氨基酸衍生物接枝到壳聚糖的氨基上,通过透析处理得到目标产物。
本发明所述的新型的壳聚糖-g-抗菌肽聚合物的制备方法,其具体步骤为:
氨基酸衍生物的合成:赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐两种氨基酸衍生物分别由苄氧羰基赖氨酸和缬氨酸与三光气反应得到。两种氨基酸衍生物制备过程类似,仅以赖氨酸-N-羧酸酐为例说明合成过程。在氮气氛下,取一定量的苄氧羰基赖氨酸溶于适量无水四氢呋喃中,同时伴以磁力搅拌。苄氧羰基赖氨酸与三光气反应的投料比为3:1,使用注射器将三光气逐滴加入到反应容器中。将混合物升温至50℃,反应3小时。待体系澄清后冷却至室温,用大量正己烷洗涤沉淀三次,离心分离得到沉淀产物,真空室温干燥得到白色固体即为赖氨酸-N-羧酸酐。
1)壳聚糖-g-抗菌肽聚合物的合成:将由步骤1)得到的赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐以及壳聚糖按比例溶于无水N,N-二甲基甲酰胺,同时伴以磁力搅拌,室温条件下反应5d。产物用丙酮沉淀,过滤后真空干燥。对干燥后的产物进行脱保护处理,将产物溶于含有三氟乙酸和33%HBr的冰醋酸混合溶液中,室温下搅拌反应24h,用丙酮沉淀,过滤后真空干燥。将产物溶于蒸馏水中,用1mol/L NaOH将pH调节至7,使用截留分子量3500Da的透析袋透析4d后,冷冻干燥得到最终产物。
本发明的有益效果:经过研究发现本发明制备的新型壳聚糖-g-抗菌肽聚合物在中性介质中对于大肠杆菌具有良好的抗菌活性,其最低抑菌浓度MIC值为512μg/mL,最低杀菌浓度MBC值为2048μg/mL。相对而言,单纯的壳聚糖对于大肠杆菌的抗菌活性要低很多,其最低抑菌浓度MIC值为2048μg/mL,最低杀菌浓度MBC值为4096μg/mL。
同时,基于临床实际应用考虑,新型壳聚糖-g-抗菌肽聚合物合成方法简单,合成原料成本低,易于实现大规模生产,尤其是其在中性介质中的抗菌性能使得其在抗菌领域将会有广泛的应用前景。
附图说明
图1实施例1中合成氨基酸衍生物的线路示意图
图2实施例1中合成壳聚糖-g-抗菌肽聚合物的线路示意图
图3实施例1中制备的壳聚糖-g-抗菌肽聚合物的傅里叶变换红外光谱图
图4实施例2中壳聚糖-g-抗菌肽聚合物最低杀菌浓度MBC测定平板培养图(其中a,b,c,d中壳聚糖-g-抗菌肽聚合物的浓度分别为0μg/mL,512μg/mL,1024μg/mL,2048μg/mL,)
图5实施例3中壳聚糖最低杀菌浓度MBC测定平板培养图(其中a,b,c中壳聚糖的浓度分别为0μg/mL,2048μg/mL,4096μg/mL,)
具体实施方式
实施例1
1)氨基酸衍生物的合成:赖氨酸-N-羧酸酐(Lys NCA)和缬氨酸-N-羧酸酐(ValNCA)两种氨基酸衍生物分别由苄氧羰基赖氨酸和缬氨酸与三光气反应得到。两种氨基酸衍生物制备过程类似,仅以赖氨酸-N-羧酸酐(Lys NCA)为例说明合成过程。在氮气保护下,取一定量的苄氧羰基赖氨酸溶于适量无水四氢呋喃中,同时伴以磁力搅拌。苄氧羰基赖氨酸与三光气反应的投料比为3:1,使用注射器将三光气逐滴加入到反应容器中。将混合物升温至50℃,反应3小时。待体系澄清后冷却至室温,用大量正己烷洗涤沉淀三次,离心分离得到沉淀产物,真空室温干燥得到白色固体即为赖氨酸-N-羧酸酐(Lys NCA)。
2)壳聚糖-g-抗菌肽聚合物的合成:将由步骤1)得到的赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐以及壳聚糖按比例溶于无水N,N-二甲基甲酰胺,同时伴以磁力搅拌,室温条件下反应5d。产物用丙酮沉淀,过滤后真空干燥。对干燥后的产物进行脱保护处理,将产物溶于含有三氟乙酸和33%HBr的冰醋酸混合溶液中,室温下搅拌反应24h,用丙酮沉淀,过滤后真空干燥。将产物溶于蒸馏水中,用1mol/L NaOH将pH调节至7,使用截留分子量3500Da的透析袋透析4d后,冷冻干燥得到最终产物。
实施例2
取实施例1得到的壳聚糖-g-抗菌肽聚合物固体,配置成不同浓度梯度的中性水溶液,分别为4096μg/mL,2048μg/mL,1024μg/mL,512μg/mL,256μg/mL,128μg/mL,64μg/mL,32μg/mL,16μg/mL,8μg/mL,4μg/mL,2μg/mL,0μg/mL。在37℃振荡孵育条件下,使得大肠杆菌在LB培养液中达到细菌的对数增长期。在LB培养液中稀释到细菌浓度为104-105CFU mL-1。将100μL大肠杆菌培养液与400μL LB培养液,500μL壳聚糖-g-抗菌肽聚合物水溶液混合,加入离心管。在37℃孵育24小时,培养基澄澈透明,无明显细菌生长的浓度确定为最低抑菌浓度(MIC),实验结果显示,MIC值为512μg/mL。将空白组、最低抑菌浓度以及更高浓度的离心管中的菌悬液进行逐级稀释,取各级稀释菌悬液100μL,均匀涂布在平板琼脂培养基表面,37℃孵育12小时,统计菌落数目,无细菌菌落生长的浓度定义为最低杀菌浓度(MBC),实验结果显示,其MBC值为2048μg/mL。
实施例3
将壳聚糖按实施例1制备壳聚糖-g-抗菌肽聚合物的方法做相同处理,配置成不同浓度梯度的中性水溶液,分别为8192μg/mL,4096μg/mL,2048μg/mL,1024μg/mL,512μg/mL,256μg/mL,128μg/mL,64μg/mL,32μg/mL,16μg/mL,8μg/mL,4μg/mL,2μg/mL,0μg/mL。在37℃振荡孵育条件下,使得大肠杆菌在LB培养液中达到细菌的对数增长期。在LB培养液中稀释到细菌浓度为104-105CFU mL-1。将100μL大肠杆菌培养液与400μL LB培养液,500μL壳聚糖水溶液混合,加入离心管。在37℃孵育24小时,培养基澄澈透明,无明显细菌生长的浓度确定为最低抑菌浓度(MIC),结果显示,其MIC值为2048μg/mL。将空白组、最低抑菌浓度以及更高浓度的离心管中的菌悬液进行逐级稀释,取各级稀释菌悬液100μL,均匀涂布在平板琼脂培养基表面,37℃孵育12小时,统计菌落数目,无细菌菌落生长的浓度定义为最低杀菌浓度(MBC),实验结果显示,其MBC值为4096μg/mL。
Claims (6)
1.一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
具体步骤为:
1)氨基酸衍生物的合成:通过苄氧羰基赖氨酸和缬氨酸与三光气反应分别得到赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐;
2)壳聚糖-g-抗菌肽聚合物的合成:两种氨基酸衍生物赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐通过NCA-ROP反应接枝到壳聚糖的氨基上,透析处理,得到壳聚糖-g-抗菌肽聚合物。
2.如权利要求1所述的一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
步骤1)中苄氧羰基赖氨酸和缬氨酸与三光气反应的投料比均为3:1;反应温度为50℃;反应时间为3h。
3.如权利要求1所述的一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
步骤2)中壳聚糖数均相对分子量在5万左右。
4.如权利要求1所述的一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
步骤2)中壳聚糖,赖氨酸-N-羧酸酐和缬氨酸-N-羧酸酐三者的投料摩尔比为1:100:50。
5.如权利要求1所述的一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
步骤2)中透析截留分子量为3500Da,透析时间为4d,多次换水。
6.如权利要求1所述的一种新型的壳聚糖-g-抗菌肽聚合物的制备方法,其特征在于:
步骤2)中得到的壳聚糖-g-抗菌肽聚合物的数均相对分子量在65000左右。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810893651.6A CN108929387B (zh) | 2018-08-08 | 2018-08-08 | 一种壳聚糖-g-抗菌肽聚合物的制备方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810893651.6A CN108929387B (zh) | 2018-08-08 | 2018-08-08 | 一种壳聚糖-g-抗菌肽聚合物的制备方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108929387A true CN108929387A (zh) | 2018-12-04 |
| CN108929387B CN108929387B (zh) | 2019-08-23 |
Family
ID=64445037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810893651.6A Active CN108929387B (zh) | 2018-08-08 | 2018-08-08 | 一种壳聚糖-g-抗菌肽聚合物的制备方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108929387B (zh) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569240A (zh) * | 2018-12-14 | 2019-04-05 | 山东汇之蓝环保科技有限公司 | 高效脱硝离子液及其使用方法 |
| CN110054713A (zh) * | 2019-04-19 | 2019-07-26 | 同济大学 | 含抗菌肽的两亲性接枝共聚物及其制备方法和应用 |
| CN111484568A (zh) * | 2019-01-25 | 2020-08-04 | 中国科学院理化技术研究所 | 一种壳聚糖-抗菌性多肽接枝聚合物及其制备方法和应用 |
| CN114522180A (zh) * | 2020-11-23 | 2022-05-24 | 华东理工大学 | 多肽聚合物或多肽模拟物在养殖业中的应用 |
| CN118021934A (zh) * | 2023-12-29 | 2024-05-14 | 浙江大学 | 一种海胆形载药抗菌复合物及其制备方法和其在抗角膜炎中的应用 |
| CN119192591A (zh) * | 2024-09-26 | 2024-12-27 | 苏州大学 | 葡聚糖主链两性离子聚氨基酸侧链刷形聚合物及其制备与应用 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931370A (zh) * | 2006-09-14 | 2007-03-21 | 华东理工大学 | 一种糖肽缀合物微球或微囊及其制备方法 |
| CN102153742A (zh) * | 2011-01-21 | 2011-08-17 | 中国科学院长春应用化学研究所 | 聚氨基酸接枝共聚物及其制备方法 |
| CN103816054A (zh) * | 2014-02-25 | 2014-05-28 | 华南理工大学 | 一种负载β-胡萝卜素的壳聚糖基自组装纳米胶束溶液及其制备方法 |
| CN108329467A (zh) * | 2018-02-10 | 2018-07-27 | 中国科学院大学 | 一种新型的超支化抗菌肽聚合物的制备方法 |
-
2018
- 2018-08-08 CN CN201810893651.6A patent/CN108929387B/zh active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931370A (zh) * | 2006-09-14 | 2007-03-21 | 华东理工大学 | 一种糖肽缀合物微球或微囊及其制备方法 |
| CN102153742A (zh) * | 2011-01-21 | 2011-08-17 | 中国科学院长春应用化学研究所 | 聚氨基酸接枝共聚物及其制备方法 |
| CN103816054A (zh) * | 2014-02-25 | 2014-05-28 | 华南理工大学 | 一种负载β-胡萝卜素的壳聚糖基自组装纳米胶束溶液及其制备方法 |
| CN108329467A (zh) * | 2018-02-10 | 2018-07-27 | 中国科学院大学 | 一种新型的超支化抗菌肽聚合物的制备方法 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569240A (zh) * | 2018-12-14 | 2019-04-05 | 山东汇之蓝环保科技有限公司 | 高效脱硝离子液及其使用方法 |
| CN109569240B (zh) * | 2018-12-14 | 2021-08-13 | 山东汇之蓝环保科技有限公司 | 高效脱硝离子液及其使用方法 |
| CN111484568A (zh) * | 2019-01-25 | 2020-08-04 | 中国科学院理化技术研究所 | 一种壳聚糖-抗菌性多肽接枝聚合物及其制备方法和应用 |
| CN111484568B (zh) * | 2019-01-25 | 2021-12-14 | 中国科学院理化技术研究所 | 一种壳聚糖-抗菌性多肽接枝聚合物及其制备方法和应用 |
| CN110054713A (zh) * | 2019-04-19 | 2019-07-26 | 同济大学 | 含抗菌肽的两亲性接枝共聚物及其制备方法和应用 |
| CN114522180A (zh) * | 2020-11-23 | 2022-05-24 | 华东理工大学 | 多肽聚合物或多肽模拟物在养殖业中的应用 |
| WO2022105837A1 (zh) * | 2020-11-23 | 2022-05-27 | 华东理工大学 | 氨基酸聚合物或多肽模拟聚合物在养殖业中的应用 |
| CN118021934A (zh) * | 2023-12-29 | 2024-05-14 | 浙江大学 | 一种海胆形载药抗菌复合物及其制备方法和其在抗角膜炎中的应用 |
| CN119192591A (zh) * | 2024-09-26 | 2024-12-27 | 苏州大学 | 葡聚糖主链两性离子聚氨基酸侧链刷形聚合物及其制备与应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108929387B (zh) | 2019-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108929387B (zh) | 一种壳聚糖-g-抗菌肽聚合物的制备方法 | |
| Tziveleka et al. | Marine sulfated polysaccharides as versatile polyelectrolytes for the development of drug delivery nanoplatforms: Complexation of ulvan with lysozyme | |
| RU2281958C2 (ru) | Поли-гамма-глутамат сверхвысокого молекулярного веса и его применение | |
| Yan et al. | Synthesis of gentamicin-grafted-chitosan with improved solubility and antibacterial activity | |
| CN107746433B (zh) | 一种纤维素基抑菌材料双醛纤维素-赖氨酸的制备方法 | |
| CN108329467B (zh) | 一种超支化抗菌肽聚合物的制备方法 | |
| Wu et al. | Structural design and antimicrobial properties of polypeptides and saccharide–polypeptide conjugates | |
| CN101905034B (zh) | 生物多糖自组装修饰的壳聚糖抗菌生物材料的制备方法 | |
| Qin et al. | The history of chito/chitin oligosaccharides and its monomer | |
| CN109485747A (zh) | 一种水溶性壳聚糖抗菌衍生物及其制备方法 | |
| CN106995502B (zh) | 双功能基团改性壳聚糖衍生物及其制备方法 | |
| Kandile et al. | New chitosan derivatives inspired on heterocyclic anhydride of potential bioactive for medical applications | |
| Pokhrel et al. | Synthesis of chitosan from prawn shells and characterization of its structural and antimicrobial properties | |
| CN115105624B (zh) | 一种海洋多糖基高效抗菌膜敷料及其制备方法 | |
| CN109265680A (zh) | 一种pH响应的ε-聚赖氨酸及其制备方法和应用 | |
| Harutyunyan et al. | Chitosan and its derivatives: a step towards green chemistry | |
| Sayed et al. | Antimicrobial biopolymers | |
| CN111909239B (zh) | 具有细菌絮凝和抗菌性能的自组装多肽分子及其应用 | |
| CN111500653B (zh) | 一种聚谷氨酸的生产工艺 | |
| CN106804624A (zh) | 一种纳米壳寡糖/银复合诱导抗菌材料的制备方法 | |
| Nasirov et al. | Chitin and chitosan-biopolymer materials of the 21st century | |
| Van Luyen et al. | Chitin and derivatives | |
| CN111533781B (zh) | 非特异受体结合型真菌靶向抗菌肽及其制备方法和应用 | |
| CN111548388B (zh) | 一种pH响应的非螺旋-螺旋转变抗菌聚肽及其制备方法 | |
| CN110294809B (zh) | 靶向金黄色葡萄球菌抗菌肽s2及其制备方法和应用 |
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 |