Perivascular mesenchymal precursor cell induced blood vessel formation
View Patent ↗Mesenchymal precursors cells have been isolated from perivascular niches from a range of tissues utilizing a perivascular marker. A new mesenchymal precursor cell phenotype is described characterized by the presence of the perivascular marker 3G5, and preferably also alpha smooth muscle actin together with early developmental markers such as STRO-1 and CD146/MUC18. The perivascular mesenchymal precursor cell is shown to induce neovascularization and improvement in cardiac function. Suitable administration of preparations of the mesenchymal precursor cells are useful for treatment of cardiovascular diseases, cerebrovascular diseases and peripheral vascular diseases.
1. A method of improving cardiac function in a subject suffering from a cardiovascular disease, the method comprising administering to the myocardium or coronary arteries of the subject a population of cells which has been enriched for mesenchymal precursor cells (MPCs) that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A.
2. The method of claim 1 , wherein the subject suffers from a cardiovascular disease consisting of ischemic heart disease, coronary artery disease, acute myocardial infarction, congestive heart failure, cardiomyopathy, or angina.
3. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 1% MPCs capable of forming a clonogenic colony.
4. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 1% STRO-1 bright MPCs.
5. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A is isolated from a perivascular niche within a vascularised tissue source.
6. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A is cultured or expanded prior to administration.
7. The method of claim 6 , wherein the cultured or expanded population of cells comprises at least 1% MPCs capable of forming a clonogenic colony.
8. The method of claim 6 , wherein the cultured or expanded population of cells comprises at least 1% STRO-1 bright MPCs.
9. The method of claim 6 , wherein the cultured or expanded population of cells comprises at least 10% STRO-1 bright MPCs.
10. The method of claim 6 , wherein the cultured or expanded population of cells is administered by injection into the myocardium or close to the myocardium.
11. The method of claim 6 , wherein the cultured or expanded population of cells is administered by injection into the coronary arteries or close to the coronary arteries.
12. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A is introduced into the body of the subject by localized injection or on a stent.
13. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A is administered by intracoronary catheter, or by intramyocardial, trans-epicardial or transendocardial injection.
14. The method of claim 1 , wherein the MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A assemble into new blood vessel structures.
15. The method of claim 1 , wherein the MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A induce formation of new blood vessel structures.
16. The method of claim 1 , wherein the MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A induce formation of new cardiomyocytes.
17. The method of claim 1 , wherein the MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A induce proliferation of resident cardiomyocytes.
18. The method of claim 6 , wherein the cultured or expanded population of cells is introduced into the body of the subject by localized injection, systemic injection, in a patch, or on a stent.
19. The method of claim 6 , wherein the cultured or expanded population of cells is administered by intracoronary catheter, or by intramyocardial, trans-epicardial or transendocardial injection.
20. The method of claim 6 , wherein cells of the cultured or expanded population of cells assemble into new blood vessel structures.
21. The method of claim 6 , wherein the cultured or expanded population of cells induces formation of new blood vessel structures.
22. The method of claim 6 , wherein the cultured or expanded MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A induce formation of new cardiomyocytes.
23. The method of claim 6 , wherein the cultured or expanded MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A induce proliferation of resident cardiomyocytes.
24. The method of claim 1 , wherein the cells are autologous.
25. The method of claim 1 , wherein the cells are from an allogeneic source.
26. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 0.01% MPCs capable of forming a clonogenic colony.
27. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 0.1% MPCs capable of forming a clonogenic colony.
28. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 0.01% STRO-1 bright MPCs.
29. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 0.1% STRO-1 bright MPCs.
30. The method of claim 1 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A comprises at least 10% STRO-1 bright MPCs.
31. The method of claim 1 , further comprising seeding the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A in a matrix prior to administration.
32. The method of claim 31 , wherein the matrix is a scaffold.
33. The method of claim 32 , wherein the scaffold induces differentiation of the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A.
34. The method of claim 1 , further comprising administering to the subject a compound known to promote formation or repair of blood vessels.
35. The method of claim 34 , wherein the population of cells which has been enriched for MPCs that express the markers STRO-1, CD146, and alpha-smooth muscle actin and do not express CD34, CD45, and glycophorin-A and the compound known to promote formation or repair of blood vessels are coadministered.