Publication Date:
1989-09-15
Description:
Gene targeting via homologous recombination-mediated disruption in murine embryonic stem (ES) cells has been described for a number of different genes expressed in these cells; it has not been reported for any nonexpressed genes. Pluripotent stem cell lines were isolated with homologously recombined insertions at three different loci: c-fos, which is expressed at a low level in ES cells, and two genes, adipsin and adipocyte P2 (aP2), which are transcribed specifically in adipose cells and are not expressed at detectable levels in ES cells. The frequencies at which homologous recombination events occurred did not correlate with levels of expression of the targeted genes, but did occur at rates comparable to those previously reported for genes that are actively expressed in ES cells. Injection of successfully targeted cells into mouse blastocysts resulted in the formation of chimeric mice. These studies demonstrate the feasibility of altering genes in ES cells that are expressed in a tissue-specific manner in the mouse, in order to study their function at later developmental stages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, R S -- Sheng, M -- Greenberg, M E -- Kolodner, R D -- Papaioannou, V E -- Spiegelman, B M -- DK 31405/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1989 Sep 15;245(4923):1234-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dana-Farber Cancer Institute, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2506639" target="_blank"〉PubMed〈/a〉
Keywords:
Adipose Tissue/cytology
;
Animals
;
Blotting, Northern
;
Blotting, Southern
;
Carrier Proteins/biosynthesis/*genetics
;
Cell Line
;
Chimera
;
Complement Factor D
;
DNA, Recombinant
;
DNA-Binding Proteins/biosynthesis/genetics
;
Fatty Acid-Binding Proteins
;
Fatty Acids/metabolism
;
*Gene Expression Regulation
;
Genetic Vectors
;
Mice
;
*Neoplasm Proteins
;
*Nerve Tissue Proteins
;
Proto-Oncogene Proteins/biosynthesis/*genetics
;
Proto-Oncogene Proteins c-fos
;
RNA, Messenger/biosynthesis/genetics
;
*Recombination, Genetic
;
Serine Endopeptidases/*genetics
;
Stem Cells/*metabolism
;
Transfection
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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