Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of glatiramer acetate microsphere and preparation method thereof

A technology of glatiramer acetate and microspheres, which is applied in the direction of pharmaceutical formulas, medical preparations containing active ingredients, peptide/protein components, etc., which can solve frequent problems, achieve stable disease conditions, stable quality, and reduce the frequency of medication.

Active Publication Date: 2016-07-06
HYBIO PHARMA
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frequent and long-term administration and its side effects bring a lot of pain and inconvenience to patients
[0006] At present, patents on glatiramer acetate mainly focus on the development and research of its preparation method, such as Chinese patent CN102844325A, US patents 7,495,072 and 7,049,399, but there are few reports on the change of its dosage form

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of glatiramer acetate microsphere and preparation method thereof
  • A kind of glatiramer acetate microsphere and preparation method thereof
  • A kind of glatiramer acetate microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] Another aspect of the present invention provides a method for preparing glatiramer acetate microspheres, the method comprising:

[0060] (1) Add glatiramer acetate and protective agent to water for injection, stir until the drug is completely dissolved, and set aside.

[0061] (2) Weigh the polymer carrier and dissolve it in an organic solvent for use.

[0062] (3) Mix the solutions prepared in steps (1) and (2), and add emulsifiers to prepare W / O colostrum.

[0063] (4) The W / O colostrum in step (3) is added to an aqueous solution containing polyvinyl alcohol to prepare a W / O / W double emulsion.

[0064] (5) Slowly stir the W / O / W double emulsion in step (4), evaporate the organic solvent, and then filter, wash, centrifuge, collect, and freeze-dry to obtain glatiramer acetate microspheres.

[0065] among them

[0066] The protective agent in step (1) is selected from one of mannitol, gelatin, hypromellose (HPMC, viscosity not greater than 10cp), sodium carboxymethyl cellulose (NaCMC...

Embodiment

[0075] In order to further understand the present invention, the present invention will be described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are intended to illustrate and do not limit the present invention.

[0076] Raw materials

[0077] Glatiramer acetate (from Shenzhen Hanyu Pharmaceutical Co., Ltd., batch 20111109)

[0078] PLGA (purchased from Jinan Daigang Biotechnology Co., Ltd.)

[0079] Hypromellose (purchased from Anhui Shanhe Pharmaceutical Excipients Co., Ltd.)

[0080] Sodium carboxymethyl cellulose (purchased from Anhui Shanhe Pharmaceutical Excipients Co., Ltd.)

[0081] Polyvinyl alcohol (purchased from Xi'an Zaolutang Pharmaceutical Group Rehabilitation Medicine Co., Ltd.)

[0082] Span 80 (purchased from Xi'an Yuelai Pharmaceutical Technology Co., Ltd.)

[0083] Polyvinylpyrrolidone (purchased from Shandong Liaocheng Ahua Pharmaceutical Co., Ltd.)

[0084] Mannitol (purchased from Qingdao Mingyue Sea...

preparation Embodiment 1

[0096] (1) Add 6g glatiramer acetate and 0.5g HPMC to 200ml water for injection, stir to completely dissolve the drug, and set aside.

[0097] (2) Weigh 70g of polymer carrier PLGA (the ratio of lactic acid to glycolic acid is 60:40) and dissolve it in 500ml of dichloromethane.

[0098] (3) Mix the prepared solutions of (1) and (2), add 0.2% (g / ml) Span 80 and stir with a homogenizer to make W / O colostrum.

[0099] (4) Pour the W / O colostrum into 15L of an aqueous solution containing 0.3% (g / ml) polyvinyl alcohol (PVA), and make a W / O / W double emulsion at a rotation speed of 6000r / min.

[0100] (5) Slowly stir the above emulsion for 4 hours, evaporate the organic solvent to prepare semi-solid microspheres, filter, wash 3 times with water, collect by centrifugation (3000r / min), disperse with 100ml of 6% mannitol solution, and freeze dry. 125.65 g of freeze-dried microspheres were obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
molecular weightaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to an acetic acid copaxone microsphere and a preparation method thereof. The preparation method is simple in process, and the encapsulation efficiency of the prepared acetic acid copaxone microsphere is high and stable in quality.

Description

Technical field [0001] The invention relates to a medicinal microsphere and a preparation method thereof, in particular to a glatiramer acetate microsphere and a preparation method thereof. Background technique [0002] Glatirameracetate (abbreviated as GA) is an acetate salt of an artificial peptide, which contains a mixture of four randomly polymerized natural amino acids: L-glutamic acid, L-alanine, L-lysine and L-tyrosine. The average molecular weight of glatiramer acetate is 5,000-9,000 daltons. [0003] Glatiramer acetate (trade name: ) is developed and manufactured by Israel's Teva Pharmaceutical Industries Ltd. (TEVA). It was approved by the U.S. FDA in 1996 for the treatment of multiple sclerosis. Currently There are two products: water for injection and freeze-dried powder for injection, both for subcutaneous injection. [0004] In Western countries with more people with multiple sclerosis, The efficacy and tolerability have been fully affirmed. In additio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61K9/16A61K38/16A61P25/28A61P37/02
Inventor 王博郑春莲刘建马亚平袁建成
Owner HYBIO PHARMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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