Pluripotential embryonic stem cells and methods of making same
First Claim
1. An isolated non-mouse mammalian pluripotential embryonic stem cell which can:
- (a) be maintained on feeder layers for at least 20 passages; and
(b) give rise to embryoid bodies and multiple differentiated cell phenotypes in monolayer culture.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a non-mouse, including human, pluripotential embryonic stem cell which can:
(a) be maintained on feeder layers for at least 20 passages; and
(b) give rise to embryoid bodies and multiple differentiated cell phenotypes in monolayer culture.
The invention further provides a method of making a pluripotential embryonic stem cell comprising culturing germ cells and germ cell progenitors in a composition comprising a growth enhancing amount of basic fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor to primordial germ cells under cell growth conditions, thereby making a pluripotential embryonic stem cell.
Also provided are compositions useful to produce the pluripotent embryonic stem cells and methods of screening associated with the method of making the embryonic stem cell.
25 Citations
36 Claims
-
1. An isolated non-mouse mammalian pluripotential embryonic stem cell which can:
-
(a) be maintained on feeder layers for at least 20 passages; and
(b) give rise to embryoid bodies and multiple differentiated cell phenotypes in monolayer culture. - View Dependent Claims (2, 3, 30, 31, 33, 35)
-
-
4. An isolated human pluripotential embryonic stem cell which can:
-
(a) be maintained on feeder layers for at least 20 passages; and
(b) give rise to embryoid bodies and multiple differentiated cell phenotypes in monolayer culture. - View Dependent Claims (34, 36)
-
-
5. A composition comprising:
-
(a) mammalian pluripotential embryonic stem cells; and
(b) a fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of the cell. - View Dependent Claims (6)
-
-
7. A composition comprising:
-
(a) human pluripotential embryonic stem cells; and
(b) a fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of the cell.
-
-
8. A composition comprising:
-
(a) mammalian primordial germ cells; and
(b) a fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of the cells and the formation of pluripotent embryonic stem cells from the primordial germ cell. - View Dependent Claims (9)
-
-
10. A composition comprising:
-
(a) embryonic ectoderm cells; and
(b) fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of the cells and the formation of pluripotent embryonic stem cells from the embryonic ectoderm cells.
-
-
11. A composition comprising:
-
(a) germ cells; and
(b) fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of the cells and the formation of pluripotent embryonic stem cells from the germ cells. - View Dependent Claims (12)
-
- 13. A composition comprising a fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor in amounts to enhance the growth and allow the continued proliferation of primordial germ cells and the formation of pluripotent embryonic stem cells from he primordial germ cells.
- 15. A method of making a mammalian pluripotential embryonic stem cell comprising culturing a primordial germ cell in a composition comprising a growth enhancing amount of basic fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor, thereby making a pluripotential embryonic stem cell from a primordial germ cell.
- 20. A method of making a mammalian pluripotential embryonic stem cell comprising culturing an embryonic ectoderm cell in a composition comprising a growth enhancing amount of basic fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor, thereby making a pluripotential embryonic stem cell from an embryonic ectoderm cell.
- 25. A method of making a mammalian pluripotential embryonic stem cell comprising culturing a germ cell in a composition comprising a growth enhancing amount of basic fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor, thereby making a pluripotential embryonic stem cell from a germ cell.
-
29. A method of screening for a cell which can be promoted to become a pluripotential embryonic stem cell comprising culturing the cell in a composition comprising basic fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, and soluble steel factor in amounts to enhance the growth and allow the formation of pluripotential embryonic stem cells, and determining which cells become embryonic stem cells.
-
32. A method of screen factors for the ability to promote the formation of pluripotential embryonic stem cells, comprising culturing primordial germ cells or embryonic ectoderm cells in a feeder layer comprising a fibroblast growth factor, leukemia inhibitory factor, membrane associated steel factor, soluble steel factor and the growth factor to be screened, and determining the formation of pluripotential embryonic stem cells.
Specification