Reprogramming somatic cells using retroviral vectors comprising Oct-4 and Sox2 genes
The present invention relates to methods for reprogramming a somatic cell to pluripotency by administering into the somatic cell at least one or a plurality of potency-determining factors. The invention also relates to pluripotent cell populations obtained using a reprogramming method.
1. A method of reprogramming primate somatic cells, the method comprising the steps of:
introducing a retroviral vector encoding a plurality of potency-determining factors into the primate somatic cells under conditions sufficient to reprogram the cells, wherein the potency-determining factors comprise Oct-4 and Sox2, and do not comprise c-Myc and Klf4; and
culturing the primate somatic cells under embryonic stem cell culture conditions to obtain pluripotent reprogrammed cells.
2. The method of claim 1 , wherein the primate somatic cells are obtained from a post-natal individual.
3. The method of claim 1 , wherein the primate somatic cells are obtained by in vitro differentiation of a stem cell.
4. The method of claim 1 , wherein the retroviral vector is a lentiviral vector.
5. The method of claim 1 , wherein the potency-determining factors are introduced to the somatic cells as a reprogramming sequence in which a nucleic acid sequence encoding the potency-determining factor is operably linked to a heterologous promoter.
6. The method of claim 1 , wherein the potency-determining factors are Oct-4, Sox2, and at least one of Nanog and Lin28.
7. The method of claim 1 , wherein the potency-determining factors are Oct-4 and Sox2.
8. The method of claim 1 , wherein the reprogrammed cells (i) express a cell marker selected from the group consisting of Oct-4, SSEA3, SSEA4, Tra-1-60 and Tra-1-81; (ii) exhibit morphology characteristic of pluripotent cells; and (iii) form teratomas when introduced into an immunocompromised animal.
9. A method of reprogramming primate somatic cells, the method comprising the steps of:
introducing a retroviral vector encoding a plurality of potency-determining factors into the primate somatic cells under conditions sufficient to reprogram the cells, wherein the potency-determining factors comprise Oct-4, Sox2, Nanog, and Lin28; and
culturing the primate somatic cells under embryonic stem cell culture conditions to obtain reprogrammed cells having a higher potency level than the primate somatic cells.