Compositions and methods for inhibiting protein on surfaces
View Patent ↗The use of NIPAM polymers to prevent or reduce the formation of protein deposits on the surfaces of medical devices is described. The invention is particularly directed to reduction of the adsorption of proteins on surfaces of contact lenses and other medical prosthetics.
1. A method of modifying a surface of a contact lens which comprises applying a fluid to said surface of said contact lens, said fluid comprising an amount of a NIPAM polymer and an ophthalmically acceptable vehicle therefore wherein the amount of NIPAM polymer is sufficient to provide the fluid with a surface tension of less than 50 mnM −1 at a temperature of 23° C. and sufficient to modify said surface of said contact lens such that adsorption of proteins to said surface is inhibited and wherein the fluid is either:
i. a storage solution for said contact lens prior to said contact lens being worn; or
ii. a multi-purpose solution for treating said contact lens on a daily basis.
2. The method of claim 1 wherein at least a portion of the NIPAM polymer is of the following formula:
wherein n is a whole number of from 10 to 3,000.
3. The method of claim 1 wherein the fluid is a sterile, aqueous solution.
4. The method of claim 3 wherein the aqueous solution is the multi-purpose solution and comprises a surfactant.
5. The method of claim 4 wherein the aqueous solution contains an ophthalmically acceptable antimicrobial agent in an amount effective to disinfect a contact lens.
6. The method of claim 3 wherein the fluid has a physiologically compatible pH and an osmolality of 200 to 400 mOsm/kg.
7. The method of claim 4 wherein the antimicrobial agent is selected from polyquaternium-1 or biguanidine polymer.
8. The method of claim 1 wherein the fluid includes an enzyme, a chelating agent or both.
9. The method of claim 5 wherein the fluid includes an enzyme, a chelating agent or both.