Materials and methods for drug delivery and uptake
First Claim
1. A core-shell particle comprising:
- (a) a shell, wherein said shell comprises a continuous calcium carbonate film that is not an aggregate of individual calcium carbonate crystals;
(b) a core; and
(c) an intermediate layer between said shell and said core, wherein said intermediate layer comprises an amphiphilic compound, and wherein said core and said intermediate layer are surrounded by said shell.
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Accused Products
Abstract
The subject invention pertains to novel materials and methods for use in delivering and sequestering substances, such as pharmacological agents, within a patient. One aspect of the invention is directed towards core-shell particles having a core encapsulated within a calcium carbonate shell, with an intermediate layer composed of an amphiphilic compound surrounding the core. When the particles of the subject invention are administered to a patient, they are capable of removing lipophilic drugs by absorption of the drug through their mineral shell and into their core. The particles of the subject invention can also be administered to a patient as controlled release, drug delivery vehicles. Thus, in another aspect, the subject invention concerns a method of delivering pharmacological agents by administering the core-shell particles of the subject invention to a patient in need of such administration.
23 Citations
35 Claims
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1. A core-shell particle comprising:
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(a) a shell, wherein said shell comprises a continuous calcium carbonate film that is not an aggregate of individual calcium carbonate crystals; (b) a core; and (c) an intermediate layer between said shell and said core, wherein said intermediate layer comprises an amphiphilic compound, and wherein said core and said intermediate layer are surrounded by said shell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A core-shell particle comprising:
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(a) a shell, wherein said shell comprises a continuous calcium carbonate film, wherein said film is not an aggregate of individual calcium carbonate crystals, wherein said film is formed by a liquid phase calcium carbonate precursor that confers on said film a uniform thickness and an amorphous or spherulitic crystalline structure, and wherein said spherulitic crystalline structure exhibits a Maltese Cross extinction pattern when viewed under cross-polarized light microscopy; (b) a core; and (c) an intermediate layer between said shell and said core, wherein said intermediate layer comprises an amphiphilic compound, and wherein said core and said intermediate layer are surrounded by said shell.
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Specification