Abstract:
Particulate constructs stabilized by amphiphilic copolymers and comprising at least one active coupled to a hydrophobic moiety provide sustained release of the active in both in vitro and in vivo environments.
Abstract:
Particulate constructs stabilized by amphiphilic copolymers and comprising at least one active coupled to a hydrophobic moiety provide sustained release of the active in both in vitro and in vivo environments.
Abstract:
Liposomes that contain at least 10 mol % of a negatively charged lipid coupled to an non-zwitterionic moiety are stable in the blood. Liposomes containing at least 1 mol % of such lipids may be frozen safely.
Abstract:
Liposomes that contain at least 10 mol % of a negatively charged lipid coupled to an non-zwitterionic moiety are stable in the blood. Liposomes containing at least 1 mol % of such lipids may be frozen safely.
Abstract:
The liposomes of the invention have a reactive surface that demonstrates reduced interaction with macromolecules and increased blood circulation time. The reactive surface may comprise phosphatidylserine. The liposomes are protected by the presence of high levels of a hydrophilic polymer conjugated to a lipid. The invention further provides means for adjusting the appropriate ratio of hydrophilic polymer to a reactive lipid by a) determining the reactivity of the lipid; b) determining the time required for the carrier to reach its desired target location; c) determining the affinity of desired interactions with the reactive surface; and d) incorporating in the liposome or lipid carrier the amount of polyethylene glycol required to protect the reactive surface.