Encapsulation of nanosuspensions in liposomes and microspheres
First Claim
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1. A liposome comprising at least one hydrophobic agent dispersed in at least one chamber bounded by at least one membrane.
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Abstract
Sustained release of hydrophobic agents may be achieved by incorporation of the agents into liposomes and microspheres. This is achieved by use of a nanosuspension comprising the hydrophobic agent. The nanosuspension may be used as the aqueous solution in the formation of the liposomes and microspheres.
100 Citations
67 Claims
- 1. A liposome comprising at least one hydrophobic agent dispersed in at least one chamber bounded by at least one membrane.
- 5. A multivesicular liposome comprising at least one hydrophobic agent dispersed in at least one chamber bounded by at least one membrane.
- 9. A microsphere comprising at least one hydrophobic agent dispersed in at least one internal chamber bounded by at least one membrane.
- 27. A composition comprising at least one liposome comprising at least one hydrophobic agent dispersed in at least one chamber bounded by at least one membrane, and a pharmaceutically acceptable suspending agent.
- 32. A composition comprising at least one multivesicular liposome comprising at least one hydrophobic agent dispersed in at least one chamber bounded by at least one membrane, and a pharmaceutically acceptable suspending agent.
- 37. A composition comprising at least one microsphere comprising at least one hydrophobic agent dispersed in at least one internal chamber bounded by at least one membrane.
- 42. A method for the sustained release of at least one hydrophic agent to a living being comprising administration to said living being of at least one liposome comprising the at least one hydrophic agent located within at least one liposome chamber.
- 46. A method for the sustained release of at least one hydrophic agent to a living being comprising administration to said living being of at least one multivesicular liposome comprising the at least one hydrophic agent located within at least one multivesicular liposome chamber.
- 50. A method for the sustained release of at least one hydrophic agent to a living being comprising administration to said living being of at least one microsphere comprising the at least one hydrophic agent located within at least one microsphere chamber.
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54. A method for preparing a liposome comprising the step of using a hydrophobic agent nanosuspension as the aqueous phase of the liposome.
- 55. A method of preparing a multivesicular liposome comprising the step of using at least one hydrophobic agent nanosuspension as the first aqueous phase of a double emulsion process.
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57. A method for preparing a microsphere comprising the step of using a hydrophobic agent nanosuspension as the aqueous phase of the microsphere.
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58. In a method for preparing a liposome, wherein the improvement comprises use of at least one hydrophobic agent nanosuspension as the aqueous component of the liposome.
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59. In a method for preparing a mutivesicular liposome, wherein the improvement comprises use of at least one hydrophobic agent nanosuspension as the first aqueous component of the multivesicular liposome.
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60. In a method for preparing a microsphere, wherein the improvement comprises use of at least one hydrophobic agent nanosuspension as the aqueous component of the microsphere.
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61. A liposome produced by the method comprising the step of using at least one nanosuspension as the aqueous phase of the liposome.
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62. A microsphere produced by the method comprising the step of using at least one nanosuspension as the aqueous phase of the microsphere.
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63. A method for delivering at least one hydrophobic agent to a living being comprising injecting said living being with a composition comprising at least one nanoparticle encapsulated in a liposome.
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64. A method for delivering at least one hydrophobic agent to a living being comprising injecting said living being with a composition comprising at least one nanoparticle encapsulated in a multivesicular liposome.
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65. A method for delivering at least one hydrophobic agent to a living being comprising injecting said living being with a composition comprising at least one nanoparticle encapsulated in a microsphere.
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66. A method for delivering at least one hydrophobic agent to a living being comprising administration to said living being of at least one nanoparticle encapsulated in a liposome via an inhalation device selected from the group consisting of nebulizer, metered dose inhaler, spray bottle, and intratracheal tube.
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67. A method for delivering at least one hydrophobic agent to a living being comprising administration to said living being of at least one nanoparticle encapsulated in a microsphere via an inhalation device selected from the group consisting of nebulizer, metered dose inhaler, spray bottle, and intratracheal tube.
Specification