Method of altering blood sugar levels using non-transformed human pancreatic cells that have been expanded in culture
First Claim
1. A method of altering blood sugar levels of a mammal comprising administering expanded human pancreatic cells to the mammal, which expanded cells have been expanded in a cell culture and comprise enriched, non-transformed, serially passaged human pancreatic endocrine cells, wherein said cell culture is substantially free of fibroblast, macrophage, and capillary endothelial cells, and wherein said cell culture is prepared by a method comprising the steps of:
- (a) selecting said pancreatic endocrine cells from a human tissue that comprises said cells;
(b) concentrating said selected cells;
(c) resuspending said concentrated cells in a culture medium, wherein said medium comprises a basal medium supplemented with (i) hypothalamus extract and (ii) pituitary extract;
(d) culturing said resuspended cells; and
(e) passaging said cultured cells periodically to expand said culture.
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Abstract
The present invention provides a method for producing an expanded non-transformed cell culture comprising the steps of: (1) preparing partially purified, minced tissue; (2) concentrating the resulting cells and tissue pieces; (3) resuspending the concentrated tissue cells and pieces in a culture medium capable of supporting sustained cell division that is contained in a culture vessel; (4) incubating the cells; and (5) passaging the cells periodically. The present invention further provides clonal strains of cells derived from the above-mentioned cell culture, medium and conditioned medium designed for the culturing of such cells, including pancreatic, thyroid, parathyroid, and parotid cells, and the use of cultured pancreatic cells to form pancreatic pseudotissues composed of matrix-embedded aggregated (pseudoislets) or individual cells, to treat blood sugar disorders in mammals, and to test for cytotoxicity and autoimmune activities with reference to pancreatic endocrine cells.
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Citations
14 Claims
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1. A method of altering blood sugar levels of a mammal comprising administering expanded human pancreatic cells to the mammal, which expanded cells have been expanded in a cell culture and comprise enriched, non-transformed, serially passaged human pancreatic endocrine cells, wherein said cell culture is substantially free of fibroblast, macrophage, and capillary endothelial cells, and wherein said cell culture is prepared by a method comprising the steps of:
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(a) selecting said pancreatic endocrine cells from a human tissue that comprises said cells; (b) concentrating said selected cells; (c) resuspending said concentrated cells in a culture medium, wherein said medium comprises a basal medium supplemented with (i) hypothalamus extract and (ii) pituitary extract; (d) culturing said resuspended cells; and (e) passaging said cultured cells periodically to expand said culture. - View Dependent Claims (2, 3, 4, 5)
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6. A method of altering blood sugar levels of a human comprising administering expanded pancreatic cells of human origin to the human, which expanded cells have been expanded in a cell culture and comprise enriched, non-transformed, serially passaged pancreatic endocrine cells, wherein said cell culture is substantially free of fibroblast, macrophage, and capillary endothelial cells, and wherein said cell culture is prepared by a method comprising the steps of:
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(a) selecting pancreatic endocrine cells from a human tissue that comprises said cells; (b) concentrating said selected cells; (c) resuspending said concentrated cells in a culture medium, wherein said medium comprises a basal medium supplemented with (i) hypothalamus extract, (ii) pituitary extract and (iii) one or both of human placental extract or human placental lactogen; (d) culturing said resuspended cells; and (e) passaging said cultured cells periodically to expand said culture.
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7. A method of altering the blood sugar of a mammal comprising administering to said mammal non-transformed mammalian cells obtained from a non-transformed cell culture, wherein said cell culture comprises:
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a growth medium comprising (i) a basal medium supplemented with (ii) hypothalamus extract, (iii) pituitary extract, and (iv) placental extract and/or a placental lactogen, and an enriched, expanded, non-transformed population of human pancreatic endocrine cells. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification