After subcutaneous administration, most glatiramer acetate is rapidly absorbed and hydrolyzed locally. In 7 out of 9 healthy volunteers that received 60 mg of glatiramer acetate subcutaneously, the Cmax ranged from 69 to 126 ng/mL, while the other two subjects showed significantly higher values (605 and 301 ng/mL). AUC values showed great variability, ranging from 1,644 to 67,532 min⋅ng/mL. The Tmax of glatiramer acetate went from 15 to 30 min, and in all subjects, glatiramer acetate levels returned to baseline after 30-60 min. In healthy volunteers given 60 mg of glatiramer acetate subcutaneously, immunorecognizable fragments were no longer detected after 24 hours. The systemic bioavailability of glatiramer acetate is considered to be minimal. The pharmacokinetic parameters of glatiramer acetate in multiple sclerosis (MS) patients have not been determined.
DEPOT SYSTEMS COMPRISING GLATIRAMER OR PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF
申请人:MAROM Ehud
公开号:US20120164229A1
公开(公告)日:2012-06-28
The present invention provides long acting parenteral pharmaceutical compositions comprising a therapeutically effective amount of glatiramer. In particular, the present invention provides a long acting pharmaceutical composition comprising a therapeutically effective amount of glatiramer acetate in depot form suitable for administering at a medically acceptable location in a subject in need thereof. The depot form is suitable for subcutaneous or intramuscular implantation or injection.
The present invention relates to an improved process for preparing a polypeptide or pharmaceutically acceptable salt thereof comprising L-tyrosine, L-alanine, L-glutamate, and L-lysine. The polypeptide or pharmaceutically acceptable salt thereof is preferably glatiramer acetate. The process comprises: (a) polymerizing a mixture of N-carboxyanhydride of L-tyrosine, N-carboxyanhydride of L-alanine, N-carboxyanhydride of a protected L-glutamate and N-carboxyanhydride of a protected L-lysine, in a polar aprotic solvent in the presence of an initiator, to form a protected polypeptide; (b) admixing an acid with the protected polypeptide formed in Step (a) and a solvent, to form a product; and (c) admixing a substance selected from the group consisting of an alkali or alkaline earth metal hydroxide, a carbonate, a hydrogencarbonate, and mixtures thereof, with the product formed in Step (b), and a solvent or a mixture of a solvent and water, to form a deprotected polypeptide or a pharmaceutically acceptable salt thereof.
DEPOT SYSTEMS COMPRISING GLATIRAMER OR A PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF
申请人:Marom Ehud
公开号:US20120015891A1
公开(公告)日:2012-01-19
The present invention provides long acting parenteral pharmaceutical compositions comprising a therapeutically effective amount of glatiramer. In particular, the present invention provides a long acting pharmaceutical composition comprising a therapeutically effective amount of glatiramer acetate in depot form suitable for administering at a medically acceptable location in a subject in need thereof. The depot form is suitable for subcutaneous or intramuscular implantation or injection.
Depot systems comprising glatiramer or a pharmacologically acceptable salt thereof
申请人:Marom Ehud
公开号:US08796226B2
公开(公告)日:2014-08-05
Long acting parenteral pharmaceutical compositions comprising a therapeutically effective amount of glatiramer are provided. In particular, the long acting pharmaceutical composition comprises a therapeutically effective amount of glatiramer acetate in depot form suitable for administering at a medically acceptable location in a subject in need thereof. The depot form is suitable for subcutaneous or intramuscular implantation or injection.