Method for covalent attachment of biomolecules to surfaces of medical devices

• US 6,033,719 A
• Filed: 01/22/1998
• Issued: 03/07/2000
• Est. Priority Date: 04/25/1996
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Keogh, James R.
• Primary Examiner(s): Dudash, Diana
• Application Number:
  US09/012,056
• Time in Patent Office: 775 Days
• Field of Search: 427/2.1, 427/2.12, 427/2.13, 427/2.24, 427/2.28, 427/2.3, 427/2.25, 427/2.31, 427/337, 427/338, 427/342
• US Class Current: 427/2.12
• CPC Class Codes: A61L 27/28 Materials for coating prostheses
• CPC Class Codes: A61L 27/34 Macromolecular materials
• CPC Class Codes: A61L 29/085 Macromolecular materials
• CPC Class Codes: A61L 31/08 Materials for coatings
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: A61L 33/0082 by reacting with an organic compound other than heparin
• CPC Class Codes: C08L 89/00 Compositions of proteins; Compositions of derivatives thereof foodstuff preparations A23J3/00

Abstract

A method for making a medical device having at least one biomolecule immobilized on a substrate surface is provided. The method may include combining a biomolecule comprising a 1,2 dicarbonyl moiety with a material comprising a guanidino moiety to form an immobilized biomolecule on a medical device biomaterial surface through covalent bonds. Another method of the present invention may include combining a biomolecule comprising a guanidino moiety with a material comprising a 1,2 dicarbonyl moiety to form an immobilized biomolecule on a medical device biomaterial surface through covalent bonds. Additionally, one method of the present invention may be employed to crosslink biomolecules, located in solution or on a medical device biomaterial surface, thereby forming a crosslinked biomaterial or a crosslinked medical device coating.

Claims

1. A method of forming a coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the medical device having a suitable biomaterial forming the surface, a guanidino moiety being disposed on the surface;

(b) providing a biomolecule, the biomolecule comprising a 1,2 dicarbonyl moiety; and

(c) combining the 1,2 dicarbonyl moiety with the guanidino moiety to form covalent bonds, the covalent bonds immobilizing the biomolecule on the surface, the immobilized biomolecule forming the coating.

2. The method of claim 1, further comprising the addition of a stabilizing agent.

3. The method of claim 2, wherein the stabilizing agent is borate ion.

4. The method of claim 1, wherein the medical device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

5. The method of claim 1, wherein the guanidino moiety is an arginine amino acid.

6. The method of claim 1, wherein the biomolecule is a naturally occurring biomolecule.

7. The method of claim 1, wherein the biomolecule is a chemically synthesized biomolecule.

8. The method of claim 1, wherein the biomolecule is selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

9. The method of claim 1, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

10. The method of claim 1, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

11. A method of forming a coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the device having a suitable biomaterial forming the surface, a 1,2 dicarbonyl moiety being disposed on the surface;

(b) providing a biomolecule, the biomolecule comprising a guanidino moiety; and

(c) combining the guanidino moiety with the 1,2 dicarbonyl moiety to form covalent bonds, the covalent bonds immobilizing the biomolecule on the surface, the immobilized biomolecule forming the coating.

12. The method of claim 11, further comprising the addition of a stabilizing agent.

13. The method of claim 12, wherein the stabilizing agent is borate ion.

14. The method of claim 11, wherein the device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

15. The method of claim 11, wherein the guanidino moiety is an arginine amino acid.

16. The method of claim 11, wherein the biomolecule is a naturally occurring biomolecule.

17. The method of claim 11, wherein the biomolecule is a chemically synthesized biomolecule.

18. The method of claim 11, wherein the biomolecule is selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

19. The method of claim 11, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

20. The method of claim 11, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

21. A method of forming a coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the device having a suitable biomaterial forming the surface, an amine moiety being disposed on the surface;

(b) combining the amine moiety with a guanidino forming agent to form a guanidino moiety on the surface;

(c) providing a biomolecule, the biomolecule comprising a 1,2 dicarbonyl moiety; and

(d) combining the 1,2 dicarbonyl moiety with the guanidino moiety to form covalent bonds, the covalent bonds immobilizing the biomolecule on the surface, the immobilized biomolecule forming the coating.

22. The method of claim 21, further comprising the addition of a stabilizing agent.

23. The method of claim 22, wherein the stabilizing agent is borate ion.

24. The method of claim 21, wherein the device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

25. The method of claim 21, wherein the guanidino forming agent is selected from the group consisting of S-ethylthiouronium bromide, S-ethylthiouronium chloride, O-methylisourea, O-methylisouronium sulfate, O-methylisourea hydrogen sulfate, S-methylisothiourea, 2-methyl-1-nitroisourea, aminoiminomethanesulfonic acid, cyanamide, cyanoguanide, dicyandiamide, 3,5-dimethyl-1-guanylpyrazole nitrate and 3,5-dimethyl pyrazole.

26. The method of claim 21, wherein the guanidino moiety is an arginine amino acid.

27. The method of claim 21, wherein the biomolecule is a naturally occurring biomolecule.

28. The method of claim 21, wherein the biomolecule is a chemically synthesized biomolecule.

29. The method of claim 21, wherein the biomolecule is selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

30. The method of claim 21, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

31. The method of claim 21, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

32. A method of forming a coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the device having a suitable biomaterial forming the surface, a 1,2 dicarbonyl moiety being disposed on the surface;

(b) providing a biomolecule, the biomolecule comprising an amine moiety;

(c) combining the amine moiety with a guanidino forming agent to form a guanidino moiety; and

(d) combining the guanidino moiety with the 1,2 dicarbonyl moiety to form covalent bonds, the covalent bonds immobilizing the biomolecule on the surface, the immobilized biomolecule forming the coating.

33. The method of claim 32, further comprising the addition of a stabilizing agent.

34. The method of claim 33, wherein the stabilizing agent is borate ion.

35. The method of claim 32, wherein the device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

36. The method of claim 32, wherein the guanidino forming agent is selected from the group consisting of S-ethylthiouronium bromide, S-ethylthiouronium chloride, O-methylisourea, O-methylisouronium sulfate, O-methylisourea hydrogen sulfate, S-methylisothiourea, 2-methyl-1-nitroisourea, aminoiminomethanesulfonic acid, cyanamide, cyanoguanide, dicyandiamide, 3,5-dimethyl-1-guanylpyrazole nitrate and 3,5-dimethyl pyrazole.

37. The method of claim 32, wherein the guanidino moiety is an arginine amino acid.

38. The method of claim 32, wherein the biomolecule is a naturally occurring biomolecule.

39. The method of claim 32, wherein the biomolecule is a chemically synthesized biomolecule.

40. The method of claim 32, wherein the biomolecule is selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

41. The method of claim 32, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

42. The method of claim 32, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

43. A method of forming a crosslinked coating on a surface of a medical device, the coating being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing a first biomolecule, the first biomolecule comprising a 1,2 dicarbonyl moiety;

(b) providing a second biomolecule, the second biomolecule comprising a guanidino moiety;

(c) combining the guanidino moiety with the 1,2 dicarbonyl moiety to form covalent bonds, the covalent bonds crosslinking the two materials together to form a crosslinked biomaterial;

(d) providing a medical device surface; and

(e) immobilizing the crosslinked biomaterial on the surface, the crosslinked biomaterial forming the coating.

44. The method of claim 43, further comprising the addition of a stabilizing agent.

45. The method of claim 44, wherein the stabilizing agent is borate ion.

46. The method of claim 43, wherein the first biomolecule is selected from the group consisting of an anticoagulant, an antithrombotic, a clotting agent, a platelet agent, an anti-inflammatory, an antibody, an immunoglobulin, a defense agent, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a globular protein, a blood agent, a regulatory agent, a transport agent, a fibrous agent, a structural protein, a membrane protein, a cell attachment protein, a structural peptide, a membrane peptide, a cell attachment peptide, a proteoglycan, a toxin, an antibiotic, and a ligand.

47. The method of claim 43, wherein the guanidino moiety is an arginine amino acid.

48. The method of claim 43, wherein the second biomolecule is selected from the group consisting of an anticoagulant, an antithrombotic, a clotting agent, a platelet agent, an anti-inflammatory, an antibody, an immunoglobulin, a defense agent, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a globular protein, a blood agent, a regulatory agent, a transport agent, a fibrous agent, a structural protein, a membrane protein, a cell attachment protein, a structural peptide, a membrane peptide, a cell attachment peptide, a proteoglycan, a toxin, an antibiotic, and a ligand.

49. The method of claim 43, wherein the medical device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a cell seeding medical device, a cell binding medical device, a cell separating medical device, a vascular graft, a stent, a heart valve, a tissue glue and a temporary intravascular medical device.

50. The method of claim 43, wherein at least a portion of the crosslinked biomaterial forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

51. The method of claim 43, wherein the crosslinked biomaterial is combined with a third biomolecule.

52. The method of claim 51, wherein the third biomolecule is selected from the group consisting of an anticoagulant, an antithrombotic, a clotting agent, a platelet agent, an anti-inflammatory, an antibody, an immunoglobulin, a defense agent, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a globular protein, a blood agent, a regulatory agent, a transport agent, a fibrous agent, a structural protein, a membrane protein, a cell attachment protein, a structural peptide, a membrane peptide, a cell attachment peptide, a proteoglycan, a toxin, an antibiotic, and a ligand.

53. A method of forming a crosslinked coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the device having a suitable biomaterial forming the surface, a first guanidino moiety being disposed on the surface;

(b) providing two or more biomolecules, the biomolecules comprising a second guanidino moiety and a 1,2 dicarbonyl moiety;

(c) combining the biomolecules with the surface; and

(d) allowing the first and second guanidino moieties to combine with the 1,2 dicarbonyl moieties to form covalent bonds, the bonds immobilizing and crosslinking the biomolecules on the surface, the immobilized and crosslinked biomolecules forming the coating.

54. The method of claim 53, further comprising the addition of a stabilizing agent.

55. The method of claim 54, wherein the stabilizing agent is borate ion.

56. The method of claim 53, wherein the medical device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

57. The method of claim 53, wherein the first or second guanidino moiety is an arginine amino acid.

58. The method of claim 53, wherein the biomolecules are naturally occurring biomolecules.

59. The method of claim 53, wherein the biomolecules are chemically synthesized biomolecules.

60. The method of claim 53 wherein the biomolecules are selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

61. The method of claim 53, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

62. The method of claim 53, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

63. The method of claim 53, wherein the first or second guanidino moiety is formed by combining an amine moiety with a guanidino forming agent.

64. The method of claim 63, wherein the guanidino forming agent is selected from the group consisting of S-ethylthiouronium bromide, S-ethylthiouronium chloride, O-methylisourea, O-methylisouronium sulfate, O-methylisourea hydrogen sulfate, S-methylisothiourea, 2-methyl-1-nitroisourea, aminoiminomethanesulfonic acid, cyanamide, cyanoguanide, dicyandiamide, 3,5-dimethyl-1-guanylpyrazole nitrate and 3,5-dimethyl pyrazole.

65. A method of forming a crosslinked coating on a surface of a medical device, the coating imparting improved biocompatibility characteristics to the surface, the surface being suitable for contacting bodily tissues or fluids in or temporarily removed from a living mammalian subject, the method comprising:

(a) providing the medical device, the device having a suitable biomaterial forming the surface, a first 1,2 dicarbonyl moiety being disposed on the surface;

(b) providing two or more biomolecules, the biomolecules comprising a guanidino moiety and a second 1,2 dicarbonyl moiety;

(c) combining the biomolecules with the surface; and

(d) allowing the guanidino moieties to combine with the first and second 1,2 dicarbonyl moieties to form covalent bonds, the bonds immobilizing and crosslinking the biomolecules on the surface, the immobilized and crosslinked biomolecules forming the coating.

66. The method of claim 65, further comprising the addition of a stabilizing agent.

68. The method of claim 65, wherein the medical device is selected from the group consisting of a blood-contacting medical device, a tissue-contacting medical device, a bodily fluid-contacting medical device, an implantable medical device, an extracorporeal medical device, a blood oxygenator, a blood pump, tubing for carrying blood, an endoprosthesis medical device, a vascular graft, a stent, a pacemaker lead, a heart valve, temporary intravascular medical device, a catheter and a guide wire.

69. The method of claim 65, wherein the guanidino moiety is an arginine amino acid.

70. The method of claim 65, wherein the biomolecules are naturally occurring biomolecules.

71. The method of claim 65, wherein the biomolecules are chemically synthesized biomolecules.

72. The method of claim 65, wherein the biomolecules are selected from the group consisting of a globular protein, a structural protein, a membrane protein, a cell attachment protein, a protein, a structural peptide, a membrane peptide, a cell attachment peptide, a peptide, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, a catalyst, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a proteoglycan, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a regulatory agent, a transport agent, a fibrous agent, a blood agent, a clotting agent, a platelet agent, an antithrombotic agent, an anticoagulant agent, a polysaccharide, a carbohydrate, a fatty acid, a nucleic acid, a DNA segment, RNA segment, a lectin, a drug, a vitamin and a ligand.

73. The method of claim 65, wherein at least a portion of the surface forms at least one of a tube, a rod, a membrane, a balloon, a bag and a sheet.

74. The method of claim 65, wherein the surface comprises at least one of a biocompatible material selected from the group consisting of metal, titanium, titanium alloys, tin-nickel alloys, shape memory alloys, aluminum oxide, platinum, platinum alloys, stainless steel, MP35N stainless steel, elgiloy, stellite, pyrolytic carbon, silver carbon, glassy carbon, polymer, polyamide, polycarbonate, polyether, polyester, polyolefin, polyethylene, polypropylene, polystyrene, polyurethane, polyvinyl chloride, polyvinylpyrrolidone, silicone elastomer, fluoropolymer, polyacrylate, polyisoprene, polytetrafluoroethylene, rubber, ceramic, hydroxapatite, human protein, human tissue, animal protein, animal tissue, bone, skin, teeth, collagen, laminin, elastin, fibrin, wood, cellulose, compressed carbon and glass.

75. The method of claim 65, wherein the guanidino moiety is formed by combining an amine moiety with a guanidino forming agent.

76. The method of claim 75, wherein the guanidino forming agent is selected from the group consisting of S-ethylthiouronium bromide, S-ethylthiouronium chloride, O-methylisourea, O-methylisouronium sulfate, O-methylisourea hydrogen sulfate, S-methylisothiourea, 2-methyl-1-nitroisourea, aminoiminomethanesulfonic acid, cyanamide, cyanoguanide.

67. The method of claim wherein the stabilizing agent is borate ion.