Derivation of embryonic stem cells
View Patent ↗This present invention provides novel methods for deriving embryonic stem cells, those cells and cell lines, and the use of the cells for therapeutic and research purposes without the destruction of the embryo. It also relates to novel methods of establishing and storing an autologous stem cell line prior to implantation of an embryo, e.g., in conjunction with reproductive therapies such as IVF.
1. An in vitro method of producing a culture of non-human mammalian embryonic stem (ES) cells, comprising: (a) obtaining a blastomere from a non-human mammalian embryo; (b) culturing said blastomere with ES or embryonic carcinoma (EC) cells to form ES cell colonies containing ES cell originating from said blastomere; and (c) isolating and culturing the ES cells originating from said blastomere.
2. The method of claim 1 , wherein the blastomere is obtained from an embryo prior to compaction of the morula.
3. The method of claim 1 , wherein the blastomere is obtained from an embryo during compaction of the morula.
4. The method of claim 1 , wherein the blastomere is obtained by partially or completely removing the zona pellucida surrounding the embryo.
5. The method of claim 1 , wherein the blastomere is cultured with embryo carcinoma cells.
6. The method of claim 1 , wherein the blastomere is cultured with ES cells.
7. The method of claim 1 , wherein the blastomere is cultured with factors that inhibit differentiation of ES cells.
8. The method of claim 1 , wherein recombinant Oct-4 is introduced into the blastomere.
9. The method of claim 1 , wherein the ES cells of step (c) express an ES cell marker protein.
10. The method of claim 1 , wherein the blastomere undergoes cell division and one progeny cell is used for genetic testing and a different progeny cell is used to produce an ES cell.
11. A method of producing a non-human mammalian embryonic stem (ES) cells, comprising the steps of: (a) obtaining a blastomere from a non-human mammalian embryo; (b) aggregating the blastomere with ES cells; (c) culturing the aggregated blastomere and ES cells until ES cells derived from the blastomere form; and (d) isolating the ES cells derived from the blastomere.
12. A method of producing an ES cell line comprising the step of culturing the ES cells produced by the method of claim 1 , to produce an ES cell line.
13. The method of claim 11 , wherein the blastomere is obtained from an embryo prior to compaction of the morula.
14. The method of claim 11 , wherein the blastomere is obtained from an embryo during compaction of the morula.
15. The method of claim 11 , wherein the blastomere is obtained by partially or completely removing the zona pellucida surrounding the embryo.
16. The method of claim 11 , wherein the blastomere is cultured with factors that inhibit differentiation of the ES cells.
17. The method of claim 11 , wherein recombinant Oct-4 is introduced into the blastomere.
18. The method of claim 11 , wherein at least one ES cell derived from the blastomere expresses an ES cell marker protein.
19. The method of claim 11 , wherein at least one ES cell derived from the blastomere is used for genetic testing.
20. The method of claim 11 , wherein the embryo is cryopreserved after step (a).
21. The method of claim 20 , wherein the embryo is cultured before being cryopreserved.
22. The method of claim 1 , wherein the embryo is cryopreserved after step (a).
23. The method of claim 22 , wherein the embryo is cultured before being cryopreserved.
24. A method of producing an ES cell line comprising the step of culturing the ES cells produced by the method of claim 11 to produce an ES cell line.
25. A method of producing a culture of non-human mammalian embryonic stem (ES) cells, comprising the steps of: (a) isolating a blastomere from an 8-cell stage embryo by biopsy through a hole drilled in the zona pellucida or by zona-denuding and disaggregating said embryo; (b) culturing said blastomere with ES cells to form clumps of cells that comprise ES cells originated from said blastomere; and (c) isolating and dissociating said clumps of cells, and further isolating and culturing the ES cells that originated from said blastomere to produce a cell culture of ES cells that originated from said blastomere.