WO2019018905A1 - Processo de obtenção de membranas de nanofibras de alginato/peo mucoadesivas duplamente reticuladas, membranas de nanofibras e uso - Google Patents
Processo de obtenção de membranas de nanofibras de alginato/peo mucoadesivas duplamente reticuladas, membranas de nanofibras e uso Download PDFInfo
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- WO2019018905A1 WO2019018905A1 PCT/BR2017/000083 BR2017000083W WO2019018905A1 WO 2019018905 A1 WO2019018905 A1 WO 2019018905A1 BR 2017000083 W BR2017000083 W BR 2017000083W WO 2019018905 A1 WO2019018905 A1 WO 2019018905A1
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- Prior art keywords
- membranes
- alginate
- peo
- mucoadhesive
- solution
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- 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
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
Definitions
- This invention is in the field of medical science and chemical engineering, more specifically in the field of medical polymer preparations, and describes the process for obtaining membranes of double crosslinked mucoadhesive alginate / ⁇ n nanofibers. the nanofiber membranes to the. transmucosal or in situ release of active principles obtained by the process.
- Such membranes are high adhesion alginate and poly (ethylene oxide) (PEO) membranes obtained by electrophoretication and spray - CaCla and chitosan. Furthermore, said membranes have application in the liberation of active principles via transmucosa or in situ.
- PEO poly (ethylene oxide)
- mucosal coatings are considered potential sites for drug administration, with numerous advantages over oral administration.
- Transmucosal active principle release systems are generally designed for immediate release of the drug and immediate action for the rapid release of the drug into the systemic circulation and subsequent maintenance of the drug concentration within the therapeutic profile or for controlled release for an extended period of time.
- electrophilic nanofiber membranes as carrier-to-active agents has shown a broad future in biomedical applications, as the active principles can be conveniently incorporated into the polymers, and the drug release profile can be designed by modulation the morphology, the porosity and the composition of the nanofiber membrane.
- the present invention discloses high adhesion mucoadhesive nanofibrous membranes for buccal release of active principles, which are produced by the electrophilling technique. More specifically, the membranes are high adhesion alginate / PEO membranes, obtained by the electrophurizing process and cross-linked by atomization with CaCl 2 and chitosan.
- Electro-spinning consists of the production of nanofibers through a jat-o induced by an electric charge, a solution of polymer or molten polymer. Although the rationale for electrophorization is simple * the process is complex due to the large number of parameters influencing the shape, diameter and size of the resulting fiber,
- Chitosan and alginate are well-known, biocompatible, biodegradable and mucocoluble poie-asesarids, and can be used together to form a polyelectrolyte complex, widely used to encapsulate proteins, cells, and enzymes.
- a great advantage of the polyelectrolyte chitosan-alginate complex is its preparation that occurs in water, dispensing with the use of toxic organic solvents in the preparation coating membranes for controlled release systems.
- the membranes thus obtained are biodegradable and insoluble in water, with great potential for biomedical applications.
- nanofibers- comprising alginate and chitosan.
- Priority document US 20090087469 A1 A discloses a technology which relates to. alginate nanofibers, containing a hydrophilic polymer (such as PEO), as well as chitosan and CaCl 2 .
- the nanofiber can be employed as a device for active principle release. transplantation, or as a surgically implanted device for cartilage repair. Many additives are incorporated into the preparation of the membranes, there is no double cross-linking with CaCl2 and chitosan polycomplexation.
- the present invention describes nanofiber membranes. mucoadhesive agents for the delivery of active ingredients in situ or transmucosally, wherein the active agent (such as an antibiotic) is incorporated into the polymer solution prior to electrophoration for further double crosslinking by CaCl 2 atomization and polycomplexing with. chitosan. There is no incorporation of additives for the preparation of membranes.
- the invention relates to an alginate / PEO mucoadhesive biopolymer membrane for the release of active principles by transmucosal or in situ pathways during which no loss of fragments occurs because the material is not compacted but is constructed in a single structure of nanofibres.
- the present invention relates to the process of obtaining membranes of doubly crosslinked mucoadhesive alginate / PEO nanofibers and nanofiber membranes.
- Such membranes are high adhesion alginate / PEO membranes, obtained by the electrophorization process and crosslinked by atomization with CaCl2 and chitosan.
- membranes have application in the liberation of active principles via transmucosa or in. situ.
- Figures 2A, 2B and 2C are 5000-fold magnification MEV for 60:40 m / m alginate / PEO electrophoretic membrane in 5% ethanol (A) before reticulating, (B) after atomization with saturated solution of CaCl 2 and (C) after 24 hours in aqueous solution.
- Figures 3A and 3B are images of the alginate / PEO membranes after atomization crosslinking with (A) chitosan and (B) CaCl2 and chitosan.
- Figure 4 shows images of the alginate / PEO membranes after 4 h incubation in: (A) phosphate buffer solution and (B) artificial saliva solution, spray-dried with Chitosan (1) and CaCl2 and chitosan ( 2) .
- This invention relates to the process of obtaining membranes of doubly crosslinked mucoadhesive alginate / PEO nanofibers and nanofiber membranes incorporating active principles for transmucosal or in situ release of active principles.
- the membranes are high adhesion alginate / PEO membranes obtained by the electrowinning process and cross-linked by atomization with CaCl 2 and chitosan.
- the active principle is metronidazole.
- alginate: PEO being 50:50, 60:40, 70:30, 80:20 or 90:10, preferably 60:40;
- alginate / PEO nanofiber membranes to the crosslinking by complexation by atomizing chitosan solution at a concentration of 1.5% to 4.5%, in the spray pressure range of 5 to 20 psi;
- the alginate and PEO solution should preferably contain 4% total polymers.
- the solution of chrysotile is preferably in the concentration of 3.5%.
- the ethanol is preferably in the concentration of 5%;
- the divalent cation solution is preferably CaCl 2 in the concentration range of 10% to 20%;
- the divalent cation solution is preferably in the 10% concentration
- the electrophilic process occurs at temperatures of 25 to 31 ° C, variable relative humidity (RH) below 60%, voltage in the range of 2 to 32 kV7, distance from the needle to the collector between 10 and 20 em.
- RH variable relative humidity
- the electro-spinning process occurs because the tension is preferably 10 to 2: 5 kV and because the distance from the needle to the collector is preferably 15 cm.
- the electrophurizing flow should be between 0.5 and 1 mL / h, and the rotation speed should be between 1500 and 4000 rpm. Since the electrophoretic flow is preferably 1 ml / h, and the rotation speed is preferably 2500 rpm.
- the crosslinking process should occur with atomization pressure between 5 and 20 psi, and the height of the atomizer nozzle between 4 and 8 cm, and with pump speed in the range of 3 to 5: rpm.
- the atomization pressure in the crosslinking is preferably 10 psi, and the height of the atomizer nozzle is preferably 8 cm.
- the mucoadhesive alginate / PEO nanofibrous membranes obtained by the process are doubly crosslinked and preferably comprise the incorporation of the merronidazole as the active ingredient.
- the incorporated metronidazole should be in the concentration of 10 to 20% based on the total mass of polymers in the solution (alginate and PEO).
- the total polymer concentration in the alginate / PEO solution is 3 to 4%, wherein the alginate solution may be in the range of 50-90 and the PEO solution may being between 50 and 10, and preferably are in a ratio of 60:40. Metronidazole is added in a proportion ranging from 10 to 20% based on the total mass of the polymers in the solution (alginate and PEO).
- the membranes are electrophiled and then ionically cross-linked by atomization with a cation solution. divalent in ethanol and subsequently crosslinked by completion through the atomization of chitosan solution. 3.5%.
- membranes of this invention will have application in the delivery of drugs via the mucosa.
- polymer compositions are prepared by mixing both components in deionized water.
- the high voltage source is designed to work in the range of 2 to 32 kV, preferably 10 to 25 kV and the distance of the needle to the collector varies by 10 and 20 cm, preferably 15 cm.
- the electrowinning flow rate ranges from 0.5 to 1 mL / hr, preferably 1 mL / hr, and the rotation speed from 1500 to 4000 rpm, preferably at 2500 rpm.
- the nanofibre membranes are subjected to crosslinking, which is necessary because of the solubility of this polymer in aqueous medium.
- crosslinking is necessary because of the solubility of this polymer in aqueous medium.
- nanofibrous membranes were subjected to atomic cross-linking tests with CaCl2 solution in ethanol and crosslinking by atomization of chitosan solution at various concentrations (1.5%, 2.5%; 3.5% and 4.5%, preferably 3.5%).
- Figures 3A, 3B and 3C show SEM images for the alginate / PEO crosslinked membrane obtained under these conditions, before and after crosslinking and after 24 hours of dissolution in water at 37 ⁇ C.
- the mass loss was only 4%, however, the swelling ratio was-10% lower, very significant for the final application of the material. It was all conditions tested, the% mass loss was total within 1 hour, so the membranes were not considered suitable for an active principle release device where a contact time is required. sufficient for the active principle to have time to pass through the mucosa and be released into the bloodstream.
- Aiginato is a polyanion and can be complexed with a polymer, such as chitosan.
- the polyeietrolite complex formed shows improvement in the percentage of mass loss, as desired.
- the atomization of a solution of chitosan with. concentrations (1.5%, 2.5%, 3.5%, 4.5%) in the alginate / PEO membranes, and without ionic crosslinking. with CaCl 2 .
- FIGS 3A and 33 show the membranes obtained in each. type of crosslinking. Those that were subjected only to apre atomization chitosan: ⁇ sentarara is transparent with respect to which were sprayed with CaCl 2 and chitosan, showing clearly that the original halftone CaCl 2 helps to keep the membrane structure.
- SA alpinate / chitosan
- SACA alginate / CaCl 2 / chitosan
- the results obtained in the mucoadhesion time test corroborate with the results obtained in the mass loss tests.
- the mucoadhesion time test simulates the shear force applied to the membrane adhered to the mucosa oral swine, simulating the movements of saliva in the oral cavity and it was verified that the alginate / PEO membranes had the longest mucoadhesion time, remaining fixed to the mucosa during the 24 hours of follow-up of the test.
- the membranes of the present invention are novel and proposes local administration of active principles in a controlled release system positioned directly at the site of action, ensuring adequate concentration at the site of the action for a suitable period of time.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Textile Engineering (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Mechanical Engineering (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2017/000083 WO2019018905A1 (pt) | 2017-07-28 | 2017-07-28 | Processo de obtenção de membranas de nanofibras de alginato/peo mucoadesivas duplamente reticuladas, membranas de nanofibras e uso |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/BR2017/000083 WO2019018905A1 (pt) | 2017-07-28 | 2017-07-28 | Processo de obtenção de membranas de nanofibras de alginato/peo mucoadesivas duplamente reticuladas, membranas de nanofibras e uso |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019018905A1 true WO2019018905A1 (pt) | 2019-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BR2017/000083 Ceased WO2019018905A1 (pt) | 2017-07-28 | 2017-07-28 | Processo de obtenção de membranas de nanofibras de alginato/peo mucoadesivas duplamente reticuladas, membranas de nanofibras e uso |
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| Country | Link |
|---|---|
| WO (1) | WO2019018905A1 (pt) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090087469A1 (en) * | 2006-03-28 | 2009-04-02 | Washington, University Of | Alginate-based nanofibers and related scaffolds |
| WO2011059497A1 (en) * | 2009-11-12 | 2011-05-19 | Hemcon Medical Technologies, Inc. | Nanomaterial wound dressing assembly |
| US20110129510A1 (en) * | 2008-08-08 | 2011-06-02 | Basf Se | Fibrous surface structure containing active ingredients with controlled release of active ingredients, use thereof and method for the production thereof |
-
2017
- 2017-07-28 WO PCT/BR2017/000083 patent/WO2019018905A1/pt not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090087469A1 (en) * | 2006-03-28 | 2009-04-02 | Washington, University Of | Alginate-based nanofibers and related scaffolds |
| US20110129510A1 (en) * | 2008-08-08 | 2011-06-02 | Basf Se | Fibrous surface structure containing active ingredients with controlled release of active ingredients, use thereof and method for the production thereof |
| WO2011059497A1 (en) * | 2009-11-12 | 2011-05-19 | Hemcon Medical Technologies, Inc. | Nanomaterial wound dressing assembly |
Non-Patent Citations (2)
| Title |
|---|
| JJEONG SUNG IN, KREBS MELISSA D., BONINO CHRISTOPHER A., SAMOREZOV JULIA E., KHAN SAAD A., ALSBERG EBEN: "Electrospun chitosan-alginate nanofibers with in situ polyelectrolyte complexation for use as tissue engineering scaffolds", TISSUE ENGINEERING PART A, vol. 17, no. 1-2, January 2011 (2011-01-01), pages 59 - 70, XP055678783, ISSN: 1937-3341, DOI: 10.1089/ten.tea.2010.0086 * |
| WANG, J.Z. ET AL.: "Spray-spinning: a novel method for making alginate/chitosan fibrous scaffold", JOURNAL OF MATERIALS SCIENCE: MATERIALS IN MEDICINE VOLUME, vol. 21, no. 2, February 2010 (2010-02-01), pages 497 - 506, XP019770724, DOI: 10.1007/s10856-009-3867-1 * |
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