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. 1988 Aug;8(8):3251–3259. doi: 10.1128/mcb.8.8.3251

Functional cloning of mouse chromosomal loci specifically active in embryonal carcinoma stem cells.

K Bhat 1, M W McBurney 1, H Hamada 1
PMCID: PMC363557  PMID: 3211142

Abstract

Chromosomal loci that are specifically active in embryonal carcinoma stem cells were cloned from the mouse genome by functional selection. P19 cells, a pluripotent embryonal carcinoma cell line, were transfected with an enhancer trap (a plasmid containing an enhancerless inactive neo gene), and NEO+ transformants were isolated. All of the NEO+ cell lines retained pluripotency and expressed the neo gene. When the cells were induced to differentiate, most of the cell lines continued to express the neo gene, while the neo gene in some cell lines became repressed. From the latter group of cell lines, we have cloned the integrated neo gene plus the flanking cellular DNA sequences. Three of the six cloned DNAs possessed a high NEO+-transforming activity in undifferentiated P19 cells. Among these three, two (015 and 052) were inactive in differentiated P19 cells and NIH 3T3 cells, while the remaining one was active in these differentiated cells. Deletion analysis suggested that both 015 and 052 contain two regulatory elements (promoter and enhancer) of cellular DNA origin. The putative enhancer and promoter are separated by at least 6 kilobases in 015 and 1 kilobase in 052. Therefore, 015 and 052 cloned fragments contain regulatory DNA elements that are specifically active in the embryonal carcinoma stem cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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