Films for controlled cell growth and adhesion
First Claim
1. An article adapted for use in combination with living tissue or organisms, the article comprising a polyelectrolyte film, the film comprising a bulk region comprising an interpenetrating network of a net positively charged polyelectrolyte polymer and a net negatively charged polyelectrolyte polymer, the film further comprising a first surface region and a second surface region with a net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed at each of said first surface region and second surface region wherein (1) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said first surface region contains a polymer repeat unit having at least two fluorine atoms and (2) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said second surface region contains a polymer repeat unit having a zwitterion group and a charged polymer repeat unit that is non-zwitterionic.
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Accused Products
Abstract
An article for controlling the attachment and growth of cells on a surface of the article, and a method for the use of the article is provided. The article comprises a substratum having a surface and a film on the surface, the film comprising a network of a net positively charged composition and a net negatively charged composition, wherein the net positively charged composition comprises a net positively charged polyelectrolyte or the net negatively charged composition comprises a net negatively charged polyelectrolyte, and the net positively charged polyelectrolyte or the net negatively charged polyelectrolyte contain (i) a polymer repeat unit having at least two fluorine atoms, or (ii) a polymer repeat unit having a zwitterion group. The method comprises contacting the article with living tissue, living organisms, or with water in an aqueous system comprising living organisms.
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Citations
20 Claims
- 1. An article adapted for use in combination with living tissue or organisms, the article comprising a polyelectrolyte film, the film comprising a bulk region comprising an interpenetrating network of a net positively charged polyelectrolyte polymer and a net negatively charged polyelectrolyte polymer, the film further comprising a first surface region and a second surface region with a net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed at each of said first surface region and second surface region wherein (1) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said first surface region contains a polymer repeat unit having at least two fluorine atoms and (2) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said second surface region contains a polymer repeat unit having a zwitterion group and a charged polymer repeat unit that is non-zwitterionic.
- 8. A method for controlling the attachment and growth of cells on a surface of an article, the method comprising contacting the article with living tissue, living organisms, or with water in an aqueous system comprising living organisms wherein the article comprises a substratum having a surface and a film on the surface, the film comprising a bulk region comprising an interpenetrating network of a net positively charged polyelectrolyte polymer and a net negatively charged polyelectrolyte polymer, and wherein the film comprises a first surface region and a second surface region with a net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed at each of said first surface region and second surface region, wherein (1) the net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed in said first surface region contains a polymer repeat unit having at least two fluorine atoms and (2) the net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed in said second surface region contains a polymer repeat unit having a zwitterion group and a charged polymer repeat unit that is non-zwitterionic and wherein the net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed in said second surface region is a copolymer comprising between about 20 mole % and about 70 mole % of polymer repeat units having zwitterion groups.
- 13. An article adapted for use in combination with living tissue or organisms, the article comprising a polyelectrolyte film, the film comprising a bulk region comprising an interpenetrating network of a net positively charged polyelectrolyte polymer and a net negatively charged polyelectrolyte polymer, the film further comprising a first surface region and a second surface region with a net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed at each of said first surface region and second surface region for forming an interface with a cell growth medium at each of said first and second surface regions, wherein (1) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said first surface region contains a polymer repeat unit having at least two fluorine atoms and (2) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said second surface region contains a polymer repeat unit having a zwitterion group and a non-zwitterionic charged polymer repeat unit.
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15. An article adapted for use in combination with living tissue or organisms, the article comprising a polyelectrolyte film that is stable in an aqueous environment having a pH of 7.4, the film comprising a bulk region comprising an interpenetrating network of a net positively charged polyelectrolyte polymer and a net negatively charged polyelectrolyte polymer, the film further comprising a first surface region and a second surface region with a net positively charged polyelectrolyte polymer or net negatively charged polyelectrolyte polymer exposed at each of said first surface region and second surface region wherein (1) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said first surface region contains a polymer repeat unit having at least two fluorine atoms and (2) the net positively charged polyelectrolyte polymer or the net negatively charged polyelectrolyte polymer exposed in said second surface region contains a polymer repeat unit having a zwitterion group and a non-zwitterionic charged polymer repeat unit.
Specification