A more efficient method to generate null mutants using Hprt-Cre with floxed alleles.
A more efficient method to generate null mutants using Hprt-Cre with floxed alleles.
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DOI:
10.1016/j.jpedsurg.2011.01.023
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发表时间:
2011-09
影响因子:
2.4
通讯作者:
Zaremba, Krzyztoff M.
中科院分区:
文献类型:
--
作者:
Nichol, Peter F.;Botham, Robert;Saijoh, Yukio;Reeder, Amy L.;Zaremba, Krzyztoff M.
关键词:
The generation of non-viable homozygous null mouse embryos from heterozygote null/+ breedings can be highly resource consuming, with only 25% of the embryos in the litter being null mutants. We hypothesized that 1) we could double the number of homozygous null mouse embryos in a litter without reducing litter size using Hypoxanthine-guanine phosphoribosyltransferase-Cre (Hprt-Cre) (which is active in the female germ line at the time of fertilization) and 2) these homozygous null mutants would be identical to mutants generated through traditional null/+ breedings. To test this hypothesis we used a conditional allele Fgfr2IIIbflox. This allele when recombined is identical to the Fgfr2IIIbnull allele. An F1 generation of Fgfr2IIIbrec/+; HprtCre/+ females was created by mating Fgfr2IIIb+/+; Hprtcre′/cre females to a Fgfr2IIIbflox/flox male. The F1 females were then mated to a Fgfr2IIIbflox/flox male. F2 embryos were genotyped and the morphology and histology of the lungs, intestine, limbs and brain was analyzed. The Hprt-Cre mating strategy results in 51% of pups being genotypic homozygous null embryos (85/166) versus 23% for the standard null/+ approach (38/167). These embryos did not express the Fgfr2IIIb transcript and were phenotypically identical to null embryos generated through standard null/+ breedings. The Hprt-Cre mating strategy increases the number of homozygous mutant embryos in a litter without decreasing litter size. Embryos generated through this approach are phenotypically identical to those from standard heterozygous breedings. We recommend this approach to investigators using an model system that relies on the generation of homozygous null embryos.
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影响因子:
2.7
作者:
Urness, Lisa D.;Paxton, Christian N.;Wang, Xiaofen;Schoenwolf, Gary C.;Mansour, Suzanne L.
通讯作者:
Mansour, Suzanne L.
影响因子:
2.4
作者:
Fairbanks, TJ;Kanard, RC;Burns, RC
通讯作者:
Burns, RC
影响因子:
11.4
作者:
Grose, Richard;Fantl, Vera;Dickson, Clive
通讯作者:
Dickson, Clive
影响因子:
15.9
作者:
Rice, R;Spencer-Dene, B;Rice, DPC
通讯作者:
Rice, DPC
影响因子:
2.4
作者:
Fairbanks, TJ;Sala, FG;Burns, RC
通讯作者:
Burns, RC