Bioartificial devices and cellular matrices therefor
First Claim
1. An improved storage matrix for prolonging the functional survival of cellular tissue, comprising:
- denatured collagen and intact collagen for providing binding sites for said tissue in an amount of about 0.01 to 30 mM;
a liquid in a n amount of about 15 to 96.5 percent by weight;
a polymeric buffer substrate for reducing cellular damage to said islets at said storage temperature in an amount of about 0.01 to 1000 micromolar, wherein said substrate forms a membrane coating having a porosity to permit passage of nutrients and biological agents and prevent passage of immunogenic agents.
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Accused Products
Abstract
A device for the effective release of cellular moieties, including hormones, wherein a matrix containing a hormone producing cellular moiety is encapsulated with a nonimmunogenic polymeric material of poly-para-xylylene or other aromatic based polymeric moiety having a membrane portion with a porosity blocking passage therethrough of immunogenic agents and permitting passage therethrough of effective nutrients for said cellular moiety and the hormone produced thereby, an improved matrix for the storage, manufacture, functional testing, and viral infection testing of cellular moieties wherein a collagen based hydrogel is processed to present a liquid phase at host temperature and functions as a substrate for cellular attachment with additives effective for limiting thermal and pressure trauma, and an improved method for the harvesting tissue from organs.
84 Citations
51 Claims
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1. An improved storage matrix for prolonging the functional survival of cellular tissue, comprising:
- denatured collagen and intact collagen for providing binding sites for said tissue in an amount of about 0.01 to 30 mM;
a liquid in a n amount of about 15 to 96.5 percent by weight;
a polymeric buffer substrate for reducing cellular damage to said islets at said storage temperature in an amount of about 0.01 to 1000 micromolar, wherein said substrate forms a membrane coating having a porosity to permit passage of nutrients and biological agents and prevent passage of immunogenic agents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- denatured collagen and intact collagen for providing binding sites for said tissue in an amount of about 0.01 to 30 mM;
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10. A hydrogel matrix suitable for long term storage of cellular tissue comprising from about 15 to 96.5 percent by weight of an aqueous nutrient solution containing
0.001 to 100 mM collagen 0.01 to 1000 micromolar cryoprotectant 0.001 to 100 mM divalent chelator 0.01 micromolar to 300 mM nitric oxide inhibitor.
- 23. A storage matrix for prolonging the functional survival of cellular tissue comprising collagen in an amount sufficient to provide a structural rigidity, water, and a polymeric buffer to provide a membrane coating having a porosity to permit passage of nutrients and biological agents and prevent passage of immunogenic agents.
- 39. A method for prolonging the functional survival of cellular tissue, said method comprising placing said tissue in a storage matrix comprising a combination of denatured collagen and native collagen in an amount sufficient to provide a structural rigidity, and a polymeric buffer to provide a membrane coating having a porosity to permit passage of nutrients and biological agents and prevent the passage of immunogenic agents.
Specification