申请人:Veldman J. Robert
公开号:US20070082855A1
公开(公告)日:2007-04-12
This invention pertains to pharmaceutical formulations which comprise (i) a drug (e.g., an amphiphilic drug) (e.g., an anthracycline) (e.g., doxorubicin) and (ii) a short-chain sphingolipid (e.g., a short-chain glycosphingolipid or a short-chain sphingomyelin) (e.g., N-octanoyl-glucosylceramide, referred to as C
8
-GlcCer) (e.g., N-hexanoyl-sphingomyelin, referred to herein as C
6
-SM), and which provide improved drug delivery and efficacy. The short-chain sphingolipidis selected from compounds of the following formula:
wherein: R
1
is independently: an O-linked saccharide group; or an O-linked polyhydric alcohol group; or: R
1
is independently: an O-linked (optionally N-(C
1-4
alkyl)-substituted amino)-C
1-6
alkyl-phosphate group; or an O-linked (polyhydric alcohol-substituted)-C
1-6
alkyl-phosphate group; R
2
is independently C
3-9
alkyl, and is independently unsubstituted or substituted; R
3
is independently C
7-19
alkyl, and is independently unsubstituted or substituted; R
4
is independently —H, —OH, or —O—C
1-4
alkyl; R
N
is independently —H or C
1-4
alkyl; the bond marked with an alpha (α) is independently a single bond or a double bond; if the bond marked with an alpha (α) is a double bond, then R
5
is —H; if the bond marked with an alpha (α) is a single bond, then R
5
is —H or —OH; the carbon atom marked (*) is independently in an R-configuration or an S-configuration; the carbon atom marked (**) is independently in an R-configuration or an S-configuration; and pharmaceutically acceptable salts, solvates, esters, ethers, chemically protected forms thereof. In one embodiment, the pharmaceutical formulation is a liposomal pharmaceutical formulation prepared using a mixture of lipids comprising, at least, vesicle-forming lipids (e.g., phospholipids) (e.g., phosphatidylcholines) (e.g., fully hydrogenated soy phosphatidylcholine (HSPC)) (e.g., dipalmitoyl-phosphatidylcholine (DPPC)) and said short-chain sphingolipid, and optionally cholesterol and optionally a vesicle-forming lipid which is derivatized with a polymer chain (e.g., a phosphatidylethanolamine (PE) which is derivatized with polyethyleneglycol (PEG)) (e.g., N-(carbonyl-methoxypolyethylene glycol 2000)-1,2-distearoyl-sn-glycero-3-phosphoethanolamine sodium salt (MPEG2000-DSPE). The present invention also pertains to methods for the preparation and use of such formulations.