Microparticles based on an amphiphilic copolymer and on...

A - Human Necessities – 61 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61K 9/16 (2006.01) A61K 38/00 (2006.01) C08G 69/10 (2006.01) C08G 69/48 (2006.01) A61K 9/10 (2006.01) A61K 9/12 (2006.01)

Patent

CA 2661567

The present invention relates to novel microparticles of amphiphilic polyamino acids that transport active ingredient(s) - AI(s) -, in particular protein and peptide active ingredient(s), and also to novel modified-release pharmaceutical formulations containing said microparticles of AI. The objective of the invention is to develop novel microparticles loaded with AI, obtained by aggregation of nanoparticles of amphiphilic polyamino acids, and having improved properties, in particular in dry solid form, with regard to their capacity for dispersion and, as regards the reconstituted suspension, with regard to its stability and its ability to be readily handled and injected. In a first aspect, the invention relates to microparticles of amphiphilic polyamino acid (PO) containing at least one AI (associated noncovalently), spontaneously forming a colloidal suspension of nanoparticles in water, at pH 7.0, under isotonic conditions; wherein said microparticles are characterized a. in that they are obtained by atomization of a colloidal suspension or solution of PO comprising at least one AI, b. by a size of between 0.5 and 100 µm, and c. in that they are dispersible in a colloidal suspension. The invention also relates to the method for preparing these microparticles, to a liquid formulation comprising a suspension of these PO/AI microparticles, to a method and a kit for reconstituting this formulation, and to a dry form of this formulation.

La présente invention concerne de nouvelles microparticules de polyaminoacides amphiphiles transporteurs de principe(s) actif(s) -PA-, en particulier protéinique(s) et peptidique(s), ainsi que de nouvelles formulations pharmaceutiques à libération modifiée contenant lesdites microparticules de PA. Le but de l'invention est de mettre au point de nouvelles microparticules chargées en PA obtenues par agrégation de nanoparticules de polyaminoacides amphiphiles, et ayant des propriétés améliorées, notamment sous forme solide sèche, au regard de leur aptitude à la dispersion, et, s'agissant de la suspension reconstituée, de sa stabilité et de son aptitude à être facilement manipulée et injectée. L'invention concerne dans un premier aspect, des microparticules de polyaminoacide amphiphile (PO) contenant au moins un PA (associé de façon non covalente), formant spontanément une suspension colloïdale de nanoparticules dans l'eau, à pH 7,0, en condition isotonique; lesdites microparticules étant caractérisées a. en ce qu'elles sont obtenues par atomisation d'une solution ou d'une suspension colloïdale de PO comprenant au moins un PA, b. par une taillecomprise entre 0,5 et 100 µm, c. et en ce qu'elles sont dispersables en suspension colloïdale. L'invention concerne également le procédé de préparation de ces microparticules, une formulation liquide comprenant une suspension de ces microparticules PO/PA, un procédé et un nécessaire de reconstitution de cette formulation, et une forme sèche de cette formulation.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Microparticles based on an amphiphilic copolymer and on... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microparticles based on an amphiphilic copolymer and on..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microparticles based on an amphiphilic copolymer and on... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1855579

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.