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1. WO1997013502 - PROLONGED RELEASE OF GM-CSF

Publication Number WO/1997/013502
Publication Date 17.04.1997
International Application No. PCT/US1996/016277
International Filing Date 10.10.1996
Chapter 2 Demand Filed 12.05.1997
IPC
A61K 9/16 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
14Particulate form, e.g. powders
16Agglomerates; Granulates; Microbeadlets
A61K 38/19 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
38Medicinal preparations containing peptides
16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
17from animals; from humans
19Cytokines; Lymphokines; Interferons
CPC
A61K 38/193
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
38Medicinal preparations containing peptides
16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
17from animals; from humans
19Cytokines; Lymphokines; Interferons
193Colony stimulating factors [CSF]
A61K 9/0019
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
0012Galenical forms characterised by the site of application
0019Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
A61K 9/0024
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
0012Galenical forms characterised by the site of application
0019Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
0024Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue
A61K 9/06
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
06Ointments; Bases therefor; ; Other semi-solid forms, e.g. creams, sticks, gels
A61K 9/1635
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
14Particulate form, e.g. powders, ; Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
16Agglomerates; Granulates; Microbeadlets ; ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
1605Excipients; Inactive ingredients
1629Organic macromolecular compounds
1635obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
A61K 9/1641
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9Medicinal preparations characterised by special physical form
14Particulate form, e.g. powders, ; Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
16Agglomerates; Granulates; Microbeadlets ; ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
1605Excipients; Inactive ingredients
1629Organic macromolecular compounds
1641obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poloxamers
Applicants
  • IMMUNEX CORPORATION [US]/[US]
  • AMERICAN CYANAMID COMPANY [US]/[US]
Inventors
  • GOMBOTZ, Wayne
  • PETTIT, Dean
  • PANKEY, Susan
  • LAWTER, James, Ronald
  • HUANG, W. James
Agents
  • PABST, Patrea, L.
Priority Data
542,44512.10.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROLONGED RELEASE OF GM-CSF
(FR) LIBERATION PROLONGEE DE FACTEURS STIMULANT LES COLONIES DE GRANULOCYTES-MACROPHAGES (GM-CSF)
Abstract
(EN)
Formulations for controlled, prolonged release of GM-CSF have been developed. These are based on solid microparticles formed of the combination of biodegradable, synthetic polymers such as poly(lactic acid) (PLA), poly(glycolic acid) (PGA), and copolymers thereof with excipients and drug loadings that yield zero order or first order release, or multiphasic release over a period of approximately three to twenty-one days, preferably one week, when administered by injection. In the preferred embodiment, the microparticles are microspheres having diameters in the range of 10 to 60 microns, formed of a blend of PLGA having different molecular weights, most preferably 6,000, 30,000 and 41,000. Other embodiments have been developed to alter the release kinetics or the manner in which the drug is distributed $i(in vivo). For example, in some cases a polymer is selected which elicits a mild inflammatory reaction, for example, PLGA and polyanhydrides can act as chemoattractant, either due to the polymer itself or minor contaminants in the polymer, or polymers which are bioadhesive are used for transmucosal or oral delivery. In another embodiment, the GM-CSF is administered in a hydrogel which can be injected subcutaneous or at a specific site for controlled release. The microparticles or hydrogel are administered to the patient in an amount effective to stimulate proliferation of hematopoietic cells, especially white cells.
(FR)
L'invention concerne des formulations permettant une libération réglée et prolongée de GM-CSF. Ces formulations sont basées sur des microparticules solides constituées de la combinaison de polymères synthétiques biodégradables tels que l'acide polylactique (PLA), l'acide polyglycolique (PLG), et leurs copolymères, avec des excipients et des charges de médicaments assurant une libération avec une cinétique d'ordre 0 ou d'ordre 1, ou encore une libération multiphase, sur une période de temps d'environ trois à vingt et un jours et, de préférence, d'une semaine, lorsque l'administration se fait par injection. Dans la forme d'exécution préférée, les microparticules sont des microsphères ayant des diamètres dans la plage allant de 10 à 60 microns, constituées d'un mélange de PLGA ayant différents poids moléculaires, de préférence 6000, 30000 et 41000. D'autres formes d'exécution ont été développées pour modifier la cinétique de libération ou la manière dont le médicament se répartit $i(in vivo). Dans certains cas, on choisit un polymère qui provoque une réaction inflammatoire légère. Le PLGA et des polyanhydrides peuvent servir de facteur chimioattractif, soit par lui même ou par les impuretés mineures qu'il contient. D'autres polymères bioadhésifs peuvent servir à une administration transmucosale ou orale. Dans d'autres formes d'exécution, le GM-CSF est administré dans un hydrogel injecté par voie souscutanée ou en un site spécifique pour une libération réglée. Les microparticules ou l'hydrogel sont administrés au patient en une dose suffisante pour stimuler la prolifération des cellules hématopoïétiques, et en particulier des globules blancs.
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