Implantable biocompatible immunoisolatory vehicle for delivery of selected therapeutic products
First Claim
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1. An implantable immunoisolatory vehicle for providing a biologically active product or function, the vehicle comprising:
- (a) a core comprising a volume in excess of 1 μ
l and at least about 104 living cells dispersed in a biocompatible matrix formed of a hydrogel, said cells being capable of secreting a biologically active product or of providing a metabolic or immunologic function; and
(b) an external permselective jacket surrounding said core, said jacket being greater than 5 microns thick and formed from a hydrogel that does not ionically bond to a polymer of opposite charge on the core during formation of the jacket, said jacket being free of said cells projecting, externally therefrom, said jacket being biocompatible and having a molecular weight cutoff permitting passage of molecules to and from the core through said jacket to provide said biologically active product or function.
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Abstract
Immunoisolatory vehicles having a core and a surrounding jacket are disclosed, the core having a volume in excess of 1 μl and at least about 104 living cells capable of secreting a biologically active product or of providing a biological function to a patient, the cells dispersed in a biocompatible matrix formed of a hydrogel or an extracellular matrix component, and the external jacket being permselective, biocompatible and having a molecular weight cutoff permitting passage of molecules between the patient and the core through said jacket to provide said biological product or function.
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Citations
43 Claims
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1. An implantable immunoisolatory vehicle for providing a biologically active product or function, the vehicle comprising:
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(a) a core comprising a volume in excess of 1 μ
l and at least about 104 living cells dispersed in a biocompatible matrix formed of a hydrogel, said cells being capable of secreting a biologically active product or of providing a metabolic or immunologic function; and(b) an external permselective jacket surrounding said core, said jacket being greater than 5 microns thick and formed from a hydrogel that does not ionically bond to a polymer of opposite charge on the core during formation of the jacket, said jacket being free of said cells projecting, externally therefrom, said jacket being biocompatible and having a molecular weight cutoff permitting passage of molecules to and from the core through said jacket to provide said biologically active product or function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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8. An immunoisolatory vehicle for providing a biologically active product or function, the vehicle comprising:
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(a) a core comprising a volume in excess of 1 μ
l and at least about 104 living cells dispersed in a biocompatible hydrogel matrix, said cells being callable of secreting a biologically active product or of providing a metabolic or immunologic function; and(b) an external permselective jacket surrounding said core, said jacket comprising a biocompatible thermoplastic, said jacket being immunoisolatory and having a molecular weight cutoff permitting passage of molecules to and from the core through said jacket to provide said biological product or function. - View Dependent Claims (9, 10, 11, 12)
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13. An implantable immunoisolatory vehicle for providing a biologically active product or function, the vehicle comprising:
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(a) a core comprising a volume in excess of 1 μ
l and at least about 104 isolated cells dispersed in biocompatible extracellular matrix components, said cells being capable of secreting a biologically active product or of providing a metabolic or immunologic function; and(b) an external permselective jacket surrounding said core, said jacket comprising a thermoplastic or a hydrogel comprising a biocompatible layer greater than 5 microns thick and, said jacket having a molecular weight cutoff permitting passage of molecules to and from the core through said jacket to provide said biologically active product or function. - View Dependent Claims (14, 15, 16, 17, 29, 30, 31)
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Specification