Hydrogel compositions and methods of use
AssigneeThe General Hospital Corporation
InventorsRalph Weissleder, Alexei Bogdanov
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Abstract
Biocompatible, biodegradable, hydrogels are prepared from a backbone bonded to a cross-linking agent. Suitable backbones include proteins and polysaccharides, e.g,, albumin, polymannuronic acid, or polygalacturonic acid. Suitable cross-linking agents include polyvalent derivatives of polyethylene or polyalkylene glycol. These hydrogel compositions may be loaded with diagnostic labels, e.g,, radiopaque, paramagnetic, or superparamagnetic materials, or therapeutic drugs, e.g., chemotherapeutic drugs, antibiotics, or cells that produce therapeutic agents. This invention also relates to methods of use of such hydrogels for imaging during interventional procedures of a patient.
Claims17
A biocompatible, biodegradable, hydrogel comprising a backbone bonded to a cross-linking agent, wherein said cross-linking agent is a bis-hydroxysuccinimide ester of polyalkylene glycol ("PAG") diacid, bis-hydroxysulfosuccinimide ester of PAG diacid, bis-imidate of PAG diacid, bis-imidazolide of PAG diacid, bis-imidazolide of PAG, bis-halide of PAG, bis-chloranhydride of PAG diacid, bis (n-amino alkyl) of PAG, bis (polyoxyalkylene-bis, or bis benzoxazolide of PAG.
A therapeutic composition comprising
- a biocompatible, biodegradable hydrogel comprising a backbone bonded to a cross-linking agent, wherein said cross-linking agent is a bis-hydroxysuccinimide ester of polyalkylene glycol ("PAG") diacid, bis-hydroxysulfosuccinimide ester of PAG diacid, bis-imidate of PAG diacid, bis-imidazolide of PAG diacid, bis-imidazolide of PAG, bis-halide of PAG, bis-chloranhydride of PAG diacid, bis (n-amino alkyl) of PAG, bis (polyoxyalkylene-bis), or bis benzoxazolide of PAG,
- a diagnostic label, and
- a therapeutic drug, wherein said diagnostic label and said therapeutic drug are both loaded into said hydrogel.
Dependencies are inferred from the claim text.