Non-fibrogenic high mannuronate alginate coated transplants, processes for their manufacture, and methods for their use
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United States of America Patent
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Jul 4, 1995
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N/A
app pub date -
May 29, 1992
filing date -
May 29, 1992
priority date (Note) -
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Abstract
A transplant comprising a core of a viable, physiologically active cells coated with a non-fibrogenic alkaline earth metal alginate free from fibrogenic amounts of fucose, sulfate, phloroglucinol and protein moieties, having a mannuronate to guluronate molar ratio of from 1.2 to 6. The coating protects the core from host immunological destruction after transplantation. The coating is sufficiently permeable to permit the diffusion of nutrients and cell products through the coating. A process for coating the transplant core comprising coating the core with alginate substantially free from fibrogenic compounds and reacting the alginate coating with alkaline earth metal cations comprising calcium ions or magnesium ions or mixture thereof to form an alkaline earth metal alginate coating.
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