Prepn process of slow release parathyroid hormone microballoon
A technology of parathyroid hormone and slow-release microspheres, applied in the field of medicine, can solve the problem of not achieving the slow-release effect, etc., and achieve the effects of increasing drug loading, reducing adsorption, and improving biocompatibility
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0022] Preparation and in vitro release experiment of parathyroid hormone microspheres
[0023] a) dissolving parathyroid hormone (2%, w / w) in 200 mg of an aqueous solution of high molecular weight polysaccharide (2%, w / w) and small molecular sugar (1%, w / w) as the inner water phase;
[0024] b) The inner water phase was added to 400 mg of a dichloromethane solution of poly(lactic-co-glycolic acid) copolymer (95%, w / w), and magnetically stirred at 10,000 rpm for 2 minutes to form W / O colostrum;
[0025] c) Polyvinyl alcohol (0.1%, w / w) and sodium chloride (20%, w / w) aqueous solution at 4°C is used as the external water phase, and the external water phase is first saturated with dichloromethane, and colostrum is added to it, and the Homogenization method, 1500rpm, 50 seconds, the colostrum is further emulsified to form W / O / W double emulsion;
[0026] d) adding the above-mentioned W / O / W double emulsion into 0.5% sodium chloride solution at 4°C and stirring for 3 hours to solidi...
Embodiment 2
[0031] a) dissolving parathyroid hormone (20%, w / w) in 200 mg of an aqueous solution of high molecular weight polysaccharide (2%, w / w) and small molecular sugar (3%, w / w) as the inner water phase;
[0032] b) The inner water phase is added to 10 g of a dichloromethane solution of poly(lactic-co-glycolic acid) (75%, w / w), and magnetically stirred at 2500 rpm for 5 minutes to form W / O colostrum;
[0033] c) Polyvinyl alcohol (5%, w / w) and sodium chloride (0.5%, w / w) aqueous solution at 4°C is used as the external water phase, and the external water phase is first saturated with dichloromethane, and colostrum is added thereto, and the Homogenization method, 3500rpm, 30 seconds, the colostrum is further emulsified to form W / O / W double emulsion;
[0034] d) adding the above-mentioned W / O / W double emulsion into 25% sodium chloride solution at 4°C and stirring for 4 hours to solidify the microspheres;
[0035] e) washing the solidified microspheres with water to remove the polyvinyl...
Embodiment 3
[0037] a) dissolving parathyroid hormone (11%, w / w) in 200 mg of an aqueous solution of high molecular weight polysaccharide (2%, w / w) and small molecular sugar (2%, w / w) as the inner water phase;
[0038] b) The inner water phase was added to 4.2 g of a dichloromethane solution of poly(lactic-co-glycolic acid) copolymer (85%, w / w), and magnetically stirred at 6250 rpm for 3.5 minutes to form W / O colostrum;
[0039] c) Polyvinyl alcohol (2.55%, w / w) and sodium chloride (10.25%, w / w) aqueous solution at 4°C is used as the external water phase, and the external water phase is first saturated with dichloromethane, and colostrum is added to it, and the Homogenization method, 2500rpm, 40 seconds, the colostrum is further emulsified to form W / O / W double emulsion;
[0040] d) Add the above W / O / W double emulsion into 12.75% sodium chloride solution at 4°C, and stir for 3.5 hours to solidify the microspheres;
[0041]e) washing the solidified microspheres with water to remove the poly...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com