Method and system for myocardial infarction repair

• US 20060095089A1
• Filed: 12/14/2005
• Published: 05/04/2006
• Est. Priority Date: 11/07/1997
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Soykan, Orhan, Donovan, Maura G.
• Granted Patent: US 7,155,288 B2
• Time in Patent Office: Days
• US Class Current: 607/50
• CPC Class Codes: A61N 1/327 for enhancing the absorption properties of tissue, e.g. by electroporation
• CPC Class Codes: A61N 1/36042 of grafted tissue, e.g. skeletal muscle
• CPC Class Codes: A61N 1/3629 in combination with non-electric therapy
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators
• CPC Class Codes: C12N 5/0657 Cardiomyocytes; Heart cells

Abstract

An implantable system is provided that includes: a cell repopulation source comprising genetic material, undifferentiated and/or differentiated contractile cells, or a combination thereof capable of forming new contractile tissue in and/or near an infarct zone of a patient'"'"'s myocardium; and an electrical stimulation device for electrically stimulating the new contractile tissue in and/or near the infarct zone of the patient'"'"'s myocardium or otherwise damaged or diseased myocardial tissue.

Claims

1. An implantable system comprising:

(a) a cell repopulation source of stem cells capable of forming new contractile tissue in and/or near damaged or diseased myocardial tissue; and

(b) an electrical stimulation device for electrically stimulating the new contractile tissue formed in the [in and/or near the damaged or diseased or] myocardial tissue.

4. The implantable system of claims 1 or 2 wherein the cell repopulation source of stem cells comprise autologous cells.

5. The implantable system of claim 1 wherein the cell repopulation source comprises genetic material.

6. The implantable system of claim 5 wherein the genetic material comprises a delivery vehicle comprising a nucleic acid molecule.

7. The implantable system of claim 6 wherein the nucleic acid molecule encodes a myogenic determination gene.

8. The implantable system of claim 6 wherein the delivery vehicle comprises a viral expression vector.

9. The implantable system of claim 6 wherein the delivery vehicle comprises liposomes.

10. The implantable system of claim 5 wherein the genetic material comprises plasmid DNA.

11. The implantable system of claim 1 wherein the cell repopulation source further comprises a polymeric matrix.

12. The implantable system of claim 1 wherein the cell repopulation source is associated with a carrier.

13. The implantable system of claim 12 wherein the cell repopulation source is coated on a carrier.

14. The implantable system of claim 1 wherein the electrical stimulation device further comprises an electrical stimulation device having two electrodes connected thereto.

15. The implantable system of claim 14 wherein the is electrical stimulation device implantable and is in the form of a capsule having electrodes incorporated therein.

16. The implantable system of claim 15 wherein the electrical stimulation device is a carrier for the cell repopulation source.

17. The implantable system of claim 1 wherein the electrical stimulation device provides burst stimulation.

18. The implantable system of claim 1 wherein the electrical stimulation device provides pulse stimulation.

28. The implantable system of claims 1 or 2 wherein the cell repopulation source of stem cells comprise allogenic cells.

29. The implantable system of claim 6 wherein the nucleic acid molecule encodes VEGF.

30. The implantable system of claim 6 wherein the nucleic acid molecule encodes aFGF.

2. (canceled)

3. The implantable system of claim 2 wherein the cell repopulation source of stem cells is a mesenchymal stem cell.

19. An implantable system comprising:

(a) a cell repopulation source of stem cells for a patient'"'"'s myocardium; and

(b) an electrical stimulation device for electrically stimulating the new contractile tissue in and/or near the infarct zone of the patient'"'"'s myocardium, wherein the electrical stimulation device provides burst stimulation.

20. A method of repairing the myocardium of a patient, the method comprising:

(a) providing an implantable system comprising;

(i) a cell repopulation source comprising genetic material, stem cells, or a combination thereof, capable of forming new contractile tissue in and/or near an infarct zone of a patient'"'"'s myocardium; and

(ii) an electrical stimulation device for electrically stimulating the new contractile tissue in and/or near the damaged or diseased myocardial tissue;

(b) implanting the cell repopulation source into and/or near damaged or diseased myocardial tissue of a patient;

(c) allowing sufficient time for new contractile tissue to form from the cell repopulation source; and

(d) electrically stimulating the new contractile tissue.

21. The method of claim 20 wherein the electrical stimulation device comprises an electrical stimulation device with electrodes;

wherein the electrodes are implanted to stimulate said new contractile tissue.

22. The method of claim 20 wherein the electrical stimulation device is implantable and is in the form of a capsule having electrodes incorporated therein.

23. The method of claim 22 wherein the electrical stimulation device is a carrier for the cell repopulation source.

24. The method of claim 20 wherein the cell repopulation source is delivered through a catheter.

25. The method of claim 20 wherein the cell repopulation source comprises autologous cells.

26. The method of claim 20 wherein the cell repopulation source comprises mesenchymal stem cells.

27. The method of claim 20 wherein the step of implanting the cell repopulation source into and/or near damaged or diseased myocardial tissue the cells are implanted into the infarct zone of the myocardiumof a patient.