Muscle derived cells for the treatment of cardiac pathologies and methods of making and using the same
The present invention provides muscle-derived progenitor cells that show long-term survival following transplantation into body tissues and which can augment soft tissue following introduction (e.g. via injection, transplantation, or implantation) into a site of soft tissue. Also provided are methods of isolating muscle-derived progenitor cells, and methods of genetically modifying the cells for gene transfer therapy. The invention further provides methods of using compositions comprising muscle-derived progenitor cells for the augmentation and bulking of mammalian, including human, soft tissues in the treatment of various cosmetic or functional conditions, including malformation, injury, weakness, disease, or dysfunction. In particular, the present invention provides treatments and amelioration for dermatological conditions, gastroesophageal reflux, vesico-ureteral reflux, urinary incontinence, fecal incontinence, heart failure, and myocardial infarction.
1. A method of improving left ventricular contractility in a mammalian subject in need thereof comprising;
(a) isolating skeletal muscle cells from a human subject,
(b) suspending the human skeletal muscle cells in a medium in a first cell culture container for between 30 and 120 minutes thereby producing a cell population of adherent cells and a population of non-adherent cells;
(c) decanting the medium and the population of non-adherent cells from the first cell culture container to a second cell culture container;
(d) allowing the population of the decanted non-adherent cells in the medium from the first cell culture container to attach to the walls of the second cell culture container for 1-3 days;
(e) isolating the population of cells adhered from the walls of the second cell culture container, wherein the isolated population of cells are muscle-derived progenitor cells (MDCs); and
(f) administering the MDCs to the heart of the mammalian subject;
thereby, improving left ventricular contractility of the heart.
2. The method of claim 1 , wherein the MDCs are administered by injecting them into the heart.
3. The method of claim 2 , wherein the MDCs are injected into the heart wall.
4. The method of claim 1 , wherein the mammal is a human.
5. The method of claim 1 , wherein the MDCs are cultured to expand their number before administering to the heart of the mammalian subject.
6. The method of claim 1 , wherein the MDCs are frozen after said isolating step of (e) and thawed prior to said administering step of (f).
7. A method of isolating an end population of mammalian skeletal muscle-derived progenitor cells (MDCs) comprising
(a) suspending human skeletal muscle cells in a medium in a first cell culture container for between 30 and 120 minutes thereby producing a cell population of adherent cells and a population of non-adherent cells;
(b) decanting the medium and the population of non-adherent cells from the first cell culture container to a second cell culture container;
(c) allowing the population of the decanted non-adherent cells in the medium from the first cell culture container to attach to the walls of the second cell culture container for 1-3 days; and
(d) isolating the population of cells adhered from the walls of the second cell culture container, thereby, isolating said end population of MDCs.
8. The method of claim 7 , wherein the MDCs are subsequently frozen.
9. The method of claim 8 , wherein the MDCs are frozen at a temperature below −30° C.
10. The method of claim 8 , wherein the MDCs are frozen at a temperature below −70° C.
11. The method of claim 8 , wherein the MDCs are frozen on dry ice.