Methods for modulating embryonic stem cell differentiation
First Claim
1. An in vitro method of identifying a subpopulation of cultured human or mouse embryonic stem (ES) cells expressing Zscan4, comprising:
- (a) transfecting a population of mouse or human ES cells with an expression vector comprising a Zscan4c promoter operably linked to a nucleotide sequence encoding a reporter, wherein the Zscan4c promoter is selected from group consisting of the nucleic acid sequence as set forth in nucleotides (i) 1-2540 of SEQ ID NO;
28, (ii) 1-2643 of SEQ ID NO;
28, (iii) 1-3250 of SEQ ID NO;
28 and (iv) 1-3347 of SEQ ID NO;
28; and
(b) identifying a subpopulation of cells that expresses the reporter gene indicating Zscan-4 is expressed in the subpopulation of stem cells.
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Abstract
Described herein is Zscan4, a gene exhibiting 2-cell embryonic stage and embryonic stem cell specific expression. Identification of nine Zscan4 co-expressed genes is also described. Inhibition of Zscan4 expression inhibits the 2-cell to 4-cell embryonic transition and prevents blastocyst implantation, expansion and outgrowth. Provided herein are methods of inhibiting differentiation of a stem cell, promoting blastocyst outgrowth of embryonic stem cells and identifying a subpopulation of stem cells expressing Zscan4. Further described is the identification of Trim43 as a gene exhibiting morula-specific expression. Also provided are isolated expression vectors comprising a Zscan4 promoter, or a Trim43 promoter operably linked to a heterologous polypeptide and uses thereof. Further provided are transgenic animals comprising transgenes encoding marker proteins operably linked to Zscan4 and Trim43 promoters.
9 Citations
7 Claims
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1. An in vitro method of identifying a subpopulation of cultured human or mouse embryonic stem (ES) cells expressing Zscan4, comprising:
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(a) transfecting a population of mouse or human ES cells with an expression vector comprising a Zscan4c promoter operably linked to a nucleotide sequence encoding a reporter, wherein the Zscan4c promoter is selected from group consisting of the nucleic acid sequence as set forth in nucleotides (i) 1-2540 of SEQ ID NO;
28, (ii) 1-2643 of SEQ ID NO;
28, (iii) 1-3250 of SEQ ID NO;
28 and (iv) 1-3347 of SEQ ID NO;
28; and(b) identifying a subpopulation of cells that expresses the reporter gene indicating Zscan-4 is expressed in the subpopulation of stem cells. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification