Composition for delivering bioactive agents for immune response and its preparation
First Claim
1. A composition for potentiating the immune response of an animal, comprising a mixture of effective amounts of first biocompatible microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers and containing a bioactive agent encapsulated in a first biocompatible excipient and second biocompatible microcapsules containing a bioactive agent encapsulated in a second biocompatible excipient, said first microcapsules providing a primary immunological response and said second microcapsules releasing said agent contained in said second microcapsules in a pulsed manner to potentiate a subsequent immunological response.
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Abstract
A method, and compositions for use therein capable, of delivering a bioactive agent to an animal entailing the steps of encapsulating effective amounts of the agent in a biocompatible excipient to form microcapsules having a size less than approximately ten micrometers and administering effective amounts of the microcapsules to the animal. A pulsatile response is obtained, as well as mucosal and systemic immunity.
118 Citations
54 Claims
- 1. A composition for potentiating the immune response of an animal, comprising a mixture of effective amounts of first biocompatible microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers and containing a bioactive agent encapsulated in a first biocompatible excipient and second biocompatible microcapsules containing a bioactive agent encapsulated in a second biocompatible excipient, said first microcapsules providing a primary immunological response and said second microcapsules releasing said agent contained in said second microcapsules in a pulsed manner to potentiate a subsequent immunological response.
- 17. A composition for potentiating the immune response of an animal, comprising a mixture of effective amounts of a priming bioactive agent and first microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers and containing a bioactive agent encapsulated in a first biocompatible excipient, said priming bioactive agent providing a primary immunological response and said first microcapsules releasing said bioactive agent contained in said first microcapsules in a pulsed manner to potentiate a subsequent immune response.
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31. A composition for potentiating the immune response of an animal, comprising a mixture of effective amounts of a priming bioactive agent and first microcapsules having a size less than approximately 10 micrometers and containing a bioactive agent encapsulated in a first biocompatible excipient, said priming bioactive agent providing a primary immunological response and said first microcapsules releasing said bioactive agent contained in said first microcapsules in a pulsed manner to potentiate a subsequent immune response.
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32. A composition for delivering a bioactive agent that provides or potentiates an immune response to the mucosally associated lymphoreticular tissues of an animal or for parenterally delivering a bioactive agent that provides or potentiates an immune response to an animal, comprising an effective amount of said bioactive agent encapsulated in a biocompatible excipient to form microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers, wherein said biocompatible excipient is a poly(lactide-co-glycolide), poly(lactide), poly(glycolide), copolyoxalate, polycaprolactone, poly(lactide-co-caprolactone), poly(esteramide), polyorthoester, poly(β
- -hydroxybutyric acid), polyanhydride, or a mixture thereof.
- View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A composition for potentiating the immune response of an animal, comprising a mixture of effective amounts of first biocompatible microcapsules having a size less than approximately 10 micrometers and containing a bioactive agent encapsulated in a first biocompatible excipient and second biocompatible microcapsules containing a bioactive agent encapsulated in a second biocompatible excipient, said first microcapsules providing a primary immunological response and said second microcapsules releasing said agent contained in said second microcapsules in a pulsed manner to potentiate a subsequent immunological response.
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46. A composition for delivering a bioactive agent to the mucosally associated lymphoreticular tissues of an animal, comprising an effective amount of said bioactive agent encapsulated in a biocompatible excipient to form microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers, wherein said microcapsules comprise a mixture of a plurality of first microcapsules having a size between approximately 1 micrometer and approximately 5 micrometers and a plurality of second microcapsules having a size between approximately 5 micrometers and approximately 10 micrometers for providing both a systemic immunity and a mucosal immunity to said animal.
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47. A method of preparing a composition for delivering a bioactive agent that provides or potentiates an immune response to the mucosally associated lymphoreticular tissues of an animal, comprising the step of encapsulating effective amounts of said bioactive agent in a biocompatible excipient to form microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers, wherein the excipient is a poly(lactide-co-glycolide), poly(lactide), poly(glycolide), copolyoxalate, polycaprolactone, poly(lactide-co-caprolactone), poly(esteramide), polyorthoester, poly(β
- -hydroxybutyric acid), polyanhydride, or a mixture thereof.
- View Dependent Claims (48, 49, 50, 51)
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52. A method of preparing a composition for delivering a bioactive agent to the mucosally associated lymphoreticular tissues of an animal, comprising the step of encapsulating effective amounts of said bioactive agent in a biocompatible excipient to form microcapsules having a size between approximately 1 micrometer and approximately 10 micrometers, wherein said microcapsules are comprised of a plurality of first microcapsules having a size between approximately 1 micrometer and approximately 5 micrometers and a plurality of second microcapsules having a size between approximately 5 micrometers and approximately 10 micrometers, said first and second microcapsules can be administered to said animal to provide both a systemic immunity and a mucosal immunity.
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53. A method of preparing a composition for providing systemic immunity in an animal, comprising the step of encapsulating effective amounts of a bioactive agent in a biocompatible excipient to form microcapsules having a size between approximately 1 micrometer and approximately 5 micrometers, wherein the excipient is a poly(lactide-co-glycolide), poly(lactide), poly(glycolide), copolyoxalate, polycaprolactone, poly(lactide-co-caprolactone), poly(esteramide), polyorthoester, poly(β
- -hydroxybutyric acid), polyanhydride, or a mixture thereof.
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54. A method of preparing a composition for providing mucosal immunity in an animal, comprising the step of encapsulating effective amounts of a bioactive agent in a biocompatible excipient to form microcapsules having a size between approximately 5 micrometers and approximately 10 micrometers, wherein the excipient is a poly(lactide-co-glycolide), poly(lactide), poly(glycolide), copolyoxalate, polycaprolactone, poly(lactide-co-caprolactone), poly(esteramide), polyorthoester, poly(β
- -hydroxybutyric acid), polyanhydride, or a mixture thereof.
Specification