Radio frequency plasma deposited polymers that enhance cell growth
First Claim
1. A method of depositing a polymeric overcoat layer on a bio-material wherein said deposited layer has an effective amount of oxygen-containing groups and an enhanced ability to absorb a protein layer on said deposited layer when exposed to a biological fluid, and wherein cell attachment, mass cell culture, cell growth or mass tissue culture on said deposited layer is enhanced, said method comprising:
- exposing a surface of said bio-material to an effective amount of a gas, said gas being plasma polymerizable and includes oxygen-containing organic molecules; and
subjecting said surface, in the presence of said gas, to a plasma gas discharge wherein said enhanced protein-adsorbing surface layer is generated and attached to said exposed surface.
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Abstract
A method for enhancing bio-material capability for use as a supporting surface for cell culture is disclosed. The method requires exposure of the bio-material to a plasma polymerizable polymer gas, which includes oxygen-containing organic molecules. The material surfaces are then subjected to an RF plasma gas discharge in the presence of the gas, causing a deposition on the exposed material surfaces of a conformal overcoating of the polymer on the material. The deposition enhances fibronectin adsorption and hence cell attachment, spreading and cell growth. Preferred polymerizable gases are acetone, methanol, and ethylene oxide.
69 Citations
15 Claims
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1. A method of depositing a polymeric overcoat layer on a bio-material wherein said deposited layer has an effective amount of oxygen-containing groups and an enhanced ability to absorb a protein layer on said deposited layer when exposed to a biological fluid, and wherein cell attachment, mass cell culture, cell growth or mass tissue culture on said deposited layer is enhanced, said method comprising:
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exposing a surface of said bio-material to an effective amount of a gas, said gas being plasma polymerizable and includes oxygen-containing organic molecules; and subjecting said surface, in the presence of said gas, to a plasma gas discharge wherein said enhanced protein-adsorbing surface layer is generated and attached to said exposed surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A biological implant article that promotes endothelial cell growth and heparin binding, said article consisting essentially of:
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a porous polymer material selected from the group consisting of polyester, tetrafluoroethylene and polyurethane; and an overcoated surface layer covalently bound to said porous polymer material and comprising a plasma gas discharge layer of gas polymer selected from the group consisting of acetone, methanol, ethylene oxide, gluteraldehyde and mixtures thereof.
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- 12. A composite support member for cell culture comprising a body of bio-material and a plasma-polymerized surface deposit layer thereon, said surface deposit layer consisting essentially of a plasma-polymerized deposit layer from and effective amount of a plasma-polymerizable organic gas, wherein said gas includes oxygen-containing organic molecules, and covalently bonded to the surface of said bio-material through pendent oxygen-containing groups of the plasma-polymerizable gas.
Specification