Production of fertile XY animals from XY ES cells
First Claim
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1. A method for making and breeding a fertile female XY mouse in an F0 generation, comprising:
- (a) maintaining donor XY mouse ES cells in a medium comprising(i) a base medium, and(ii) supplements suitable for growing the mouse ES cells in culture and maintaining pluripotency,wherein the donor XY mouse ES cells do not comprise a Tdy-negative sex reversal genetic modification and wherein the base medium comprises an osmolality of 218 mOsm/kg to 322 mOsm/kg, a sodium chloride (NaCl) concentration of 50-110 mM and a sodium bicarbonate concentration of 13-25 mM;
(b) introducing a donor XY mouse ES cell from step (a) into a pre-morula stage host mouse embryo;
(c) introducing the host mouse embryo of step (b) into a recipient female mouse and gestating the host mouse embryo;
(d) obtaining an F0 XY mouse progeny comprising a F0 XY phenotypically female mouse, wherein upon attaining sexual maturity the F0 XY female mouse is fertile; and
(e) breeding the F0 XY fertile female mouse to produce progeny.
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Abstract
Methods and compositions are described for making phenotypically female fertile animals from XY donor cells and suitable host embryos. Culture media and methods are provided for maintaining XY donor cells in culture that after introduction into a host embryo and gestation in a suitable host will result in fertile XY female animals. Methods and compositions are described for making fertile female animals in an F0 generation from a donor XY cell and a host embryo, as are methods for making F1 progeny that are homozygous for a modification from a heterozygous F0 fertile male and a heterozygous F0 fertile female sibling.
15 Citations
9 Claims
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1. A method for making and breeding a fertile female XY mouse in an F0 generation, comprising:
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(a) maintaining donor XY mouse ES cells in a medium comprising (i) a base medium, and (ii) supplements suitable for growing the mouse ES cells in culture and maintaining pluripotency, wherein the donor XY mouse ES cells do not comprise a Tdy-negative sex reversal genetic modification and wherein the base medium comprises an osmolality of 218 mOsm/kg to 322 mOsm/kg, a sodium chloride (NaCl) concentration of 50-110 mM and a sodium bicarbonate concentration of 13-25 mM; (b) introducing a donor XY mouse ES cell from step (a) into a pre-morula stage host mouse embryo; (c) introducing the host mouse embryo of step (b) into a recipient female mouse and gestating the host mouse embryo; (d) obtaining an F0 XY mouse progeny comprising a F0 XY phenotypically female mouse, wherein upon attaining sexual maturity the F0 XY female mouse is fertile; and (e) breeding the F0 XY fertile female mouse to produce progeny. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification