Chemistry: molecular biology and microbiology – Carrier-bound or immobilized enzyme or microbial cell;... – Enzyme or microbial cell is immobilized on or in an organic...
Patent
1995-05-23
1999-01-12
Naff, David M.
Chemistry: molecular biology and microbiology
Carrier-bound or immobilized enzyme or microbial cell;...
Enzyme or microbial cell is immobilized on or in an organic...
424 9321, 424 937, 424422, 435176, 435177, 435178, 435377, 435382, 435395, 435403, 4352891, C12N 1104, C12N 506, C12N 508, C12N 1102
Patent
active
058587470
ABSTRACT:
Methods and compositions are provided for controlling cell distribution within an implantable bioartificial organ by exposing the cells to a treatment that inhibits cell proliferation, promotes cell differentiation, or affects cell attachment to a growth surface within the bioartificial organ. Such treatments include (1) genetically manipulating cells, (2) exposing the cells to a proliferation-inhibiting compound or a differentiation-inducing compound or removing the cells from exposure to a proliferation-stimulating compound or a differentiation-inhibiting compound; exposing the cells to irradiation, and (3) modifying a growth surface of the bioartificial organ with extracellular matrix molecules, molecules affecting cell proliferation or adhesion, or an inert scaffold, or a combination thereof. These treatments may be used in combination. The bioartificial organ typically has a semipermeable membrane encapsulating a cell-containing core, and is preferably immunoisolatory. Cells can be grown on microcarriers and then loaded into the bioartificial organ. The microcarriers may be coated with an extracellular matrix component such as collagen to cause decreased cell proliferation or increased cell differentiation. Microcarriers containing cells can be suspended in a proliferation inhibiting hydrogel matrix prior to encapsulation.
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Aebischer Patrick
Cain Brian M.
Doherty Edward J.
Gentile Frank T.
Hammang Joseph P.
Cytotherapeutics, Inc.
Elrifi Ivor R.
Naff David M.
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