Injectable depot compositions and uses thereof
First Claim
Patent Images
1. An injectable depot composition comprising:
- (a) a bioerodible, biocompatible polymer;
(b) a solvent selected from the group consisting of aromatic alcohols, esters of aromatic acids, aromatic ketones, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith;
(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, the thixotropic agent comprising a lower alkanol and said amount being between 0.01 weight percent and 15 weight percent of the combined weight of the solvent and the thixotropic agent; and
(d) a beneficial agent;
wherein the injectable depot composition does not comprise an emulsion.
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Accused Products
Abstract
Injectable depot compositions are provided that include a bioerodible, biocompatible polymer, a solvent having a miscibility in water of less than or equal to 7 wt. % at 25° C., in an amount effective to plasticize the polymer and form a gel therewith, a thixotropic agent, and a beneficial agent. The solvent comprises an aromatic alcohol, an ester of an aromatic acid, an aromatic ketone, or mixtures thereof. The compositions have substantially improved the shear thinning behavior and reduced injection force, rendering the compositions readily implanted beneath a patient'"'"'s body surface by injection.
149 Citations
44 Claims
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1. An injectable depot composition comprising:
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(a) a bioerodible, biocompatible polymer; (b) a solvent selected from the group consisting of aromatic alcohols, esters of aromatic acids, aromatic ketones, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith;(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, the thixotropic agent comprising a lower alkanol and said amount being between 0.01 weight percent and 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (2, 3, 4)
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5. An injectable depot composition comprising:
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(a) approximately 5 wt. % to approximately 90 wt. % of a biodegradable, biocompatible lactic acid-based polymer having an average molecular weight in the range of approximately 1,000 to approximately 120,000; (b) a solvent selected from the group consisting of an aromatic alcohol, an ester of an aromatic acid, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith, wherein the aromatic alcohol has the structural formula (I)
Ar-(L)n-OH
(I)in which Ar is a substituted or unsubstituted aryl or heteroaryl group, n is zero or 1, and L is a linking moiety; (c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, the thixotropic agent comprising a lower alkanol and said amount being between 0.01 Weight percent and 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An injectable depot composition comprising:
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(a) approximately 5 wt. % to approximately 90 wt. % of a poly(lactide-co-glycolide) (PLGA) copolymer having an average molecular weight in the range of approximately 1,000 to approximately 120,000; (b) approximately 5 wt. % to approximately 90 wt. % of a solvent selected from the group consisting of an aromatic alcohol, an ester of an aromatic acid, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith;(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, wherein the thixotropic agent is ethanol and an amount of ethanol is greater than or equal to 0.01 weight percent and less than or equal to 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (20)
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21. A method of administering a beneficial agent to a subject comprising:
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(1) administering an injectable depot composition to the subject at a site within the subject, the composition comprising; (a) a bioerodible, biocompatible polymer; (b) a solvent selected from the group consisting of aromatic alcohols, esters of aromatic acids, aromatic ketones, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith;(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, the thixotropic agent comprising a lower alkanol and said amount being less than 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; and (2) forming an implant at the site wherein the implant provides sustained release of the beneficial agent at the site; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (22, 23, 24)
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25. A method of administering a beneficial agent to a subject to provide sustained release of the beneficial agent to the subject, the method comprising:
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(1) administering an injectable depot composition to the subject at a site within the subject, the composition comprising; (a) approximately 5 wt. % to approximately 90 wt. % of a biodegradable, biocompatible lactic acid-based polymer having an average molecular weight in the range of approximately 1,000 to approximately 120,000; (b) a solvent selected from the group consisting of an aromatic alcohol, an ester of an aromatic acid, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith, wherein the aromatic alcohol has the structural formula (I)
Ar-(L)n-OH
(I)
in which Ar is a substituted or unsubstituted aryl or heteroaryl group, n is zero or 1, and L is a linking moiety;(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, the thixotropic agent comprising a lower alkanol and said amount being less than 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; and (2) forming an implant at the site wherein the implant provides sustained release of the beneficial agent at the site; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of administering a beneficial agent to a subject to provide sustained release of the beneficial agent to the subject, the method comprising:
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(1) administering an injectable depot composition to the subject at a site within the subject, the composition comprising; (a) approximately 5 wt. % to approximately 90 wt. % of a poly(lactide-co-glycolide) (PLGA) copolymer having an average molecular weight in the range of approximately 1,000 to approximately 120,000; (b) approximately 5 wt. % to approximately 90 wt. % of a solvent selected from the group consisting of an aromatic alcohol, an ester of an aromatic acid, and mixtures thereof, said solvent having a miscibility in water of less than or equal to 7% at 25°
C., and present in an amount effective to plasticize the polymer and form a gel therewith,(c) a thixotropic amount of a thixotropic agent mixed with the polymer effective to form a thixotropic composition, wherein the thixotropic agent is ethanol and an amount of ethanol is greater than or equal to 0.01 weight percent and less than or equal to 15 weight percent of the combined weight of the solvent and the thixotropic agent; and (d) a beneficial agent; and (2) forming an implant at the site wherein the implant provides sustained release of the beneficial agent at the site; wherein the injectable depot composition does not comprise an emulsion. - View Dependent Claims (44)
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Specification