Therapeutic intraluminal stents

• US 6,228,845 B1
• Filed: 10/21/1998
• Issued: 05/08/2001
• Est. Priority Date: 11/08/1996
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Stein, Paul M., Donovan, Maura G.
• Primary Examiner(s): Crouch, Deborah
• Assistant Examiner(s): STROUP, CARRIE M
• Application Number:
  US09/176,519
• Time in Patent Office: 930 Days
• Field of Search: 604/53, 604/265, 623/1, 514/44, 264/485, 264/279, 264/314
• US Class Current: 514/44.00R
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: C12N 15/87 Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation

Abstract

This invention relates to an intraluminal stent having a lumen-wall contacting surface and a lumen-exposed surface wherein the stent comprises a first polymer composition comprising fibrin and wherein the stent is suitable to deliver virus to the wall of a lumen of the body. The invention also relates to methods for making the stent and to methods for delivering nucleic acid to cells accessible from a wall of a body lumen.

Claims

1. A method for making a stent to deliver nucleic acid to cells accessible from a wall of a body lumen comprising the steps of:

providing a stent comprising a lumen-wall contacting surface, a lumen-exposed surface, and a first polymer composition comprising fibrin covering at least a portion of the lumen-wall contacting surface to form a polymer covered stent;

preparing virus capable of delivering nucleic acid to the walls of a body lumen; and

loading the virus on the first polymer composition.

2. The method of claim 1, wherein the loading step comprises dipping the polymer covered stent into a solution or gel comprising the virus.

3. The method of claim 1, wherein the loading step comprises spraying the polymer covered stent with a solution comprising the virus.

4. The method of claim 1, wherein the loading step comprises wicking a solution comprising the virus onto the polymer covered stent.

5. The method of claim 1 wherein the loading step comprises loading the first polymer composition and virus into a mold.

6. The method of claim 1, wherein the first polymer composition of the providing step is a polymer or copolymer that is viscoelastic, tear-resistant, and biocompatible.

7. The method of claim 1, wherein the first polymer composition of the providing step is capable of dehydration and rehydration.

8. The method of claim 1, wherein the first polymer composition of the providing step comprises fibrin and another polymer forming substance selected from the group consisting of fibrin, alginate, collagen, hyaluronic acid, porous polyurethane, and cellulose.

9. The method of claim 1, wherein the virus of the preparing step is an adenovirus.

10. The method of claim 1, wherein the virus of the preparing step is a retrovirus.

11. The method of claim 1, wherein the nucleic acid of the preparing step directs the expression of a protein in a cell.

12. The method of claim 1, wherein the nucleic acid of the preparing step binds to nucleic acid within a cell.

13. The method of claim 1, wherein the nucleic acid of the preparing step is RNA.

14. The method of claim 1, wherein the nucleic acid of the preparing step is DNA.

15. The method of claim 1, wherein the virus is added just prior to stent implantation.

16. The method of claim 1, wherein the method further comprises the step of covering at least a portion of the lumen-exposed surface with a second polymer composition.

17. The method of claim 16, wherein the covering step is performed before the loading step.

18. The method of claim 14, wherein the covering step is performed after the loading step.

19. The method of claim 1, wherein the method further comprises applying a biodegradable polymer composition to at least a portion of the lumen-wall contacting surface following the loading step.

20. A virus delivery composition comprising:

a polymer composition comprising fibrin; and

virus capable of delivering nucleic acid to a cell.