Brdm2 - an aberrant hypomorphic p63 allele.

Brdm2 - an aberrant hypomorphic p63 allele.
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DOI:
10.1038/cdd.2009.158
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发表时间:
2010-01
影响因子:
12.4
通讯作者:
Moll, U. M.
Moll, U. M.
中科院分区:
生物学1区
文献类型:
--
作者:
Talos, F.;Wolff, S.;Beyer, U.;Dobbelstein, M.;Moll, U. M.

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在回应我们最近关于p63功能的Brdm2小鼠模型的报告时,1 Mikkola等人。2对我们的三个陈述提出了担忧:(1)他们坚持他们最初的说法,即在Brdm2等位基因纯合的小鼠中没有合成任何类型的功能性p63蛋白;(2)他们报告在这些小鼠中发生了自发的野生型等位基因逆转,导致了完全正常的表皮斑块,并提出这些正常恢复的皮肤斑块实际上是我们所描述的多层上皮;(3)他们坚持Brdm2等位基因与全球p63基因敲除没有明显的区别。我们开始用Brdm2小鼠(大约3年前我们从A Mills那里收到的)作为p63 KO小鼠的来源。对26个不同的p63Brdm2/Brdm2胚胎进行了广泛的分子和蛋白质分析,这些胚胎来自多个世代和多个胎次,从E13天到P1天,一致地显示异常截断的p63变体的表达,不仅限于随机的表皮斑块,而且广泛存在,并与与目标等位基因的残留功能一致的瞬时表型相关,详情如下。我们进一步证明,在报告分析中,这种Brdm2衍生的p63既可以激活(作为TAp63),也可以抑制(作为ANp63)P53响应的启动子。因此,我们不得不认为Brdm2代表的是功能异常的亚型等位基因,而不是零等位基因。
In response to our recent report on the Brdm2 mouse model for p63 function, 1 Mikkola et al. 2 raise concerns on three of our statements:(1) they maintain their initial claim that no functional p63 protein of any kind is synthesized in mice homozygous for the Brdm2 allele;(2) they report the occurrence of spontaneous wild-type allelic reversions in these mice, leading to patches of completely normal epidermis, and propose that these normal reverted skin patches are in fact the multilayered epithelia we described; and (3) they insist that the Brdm2 allele is phenotypically indistinguishable from a global p63 knockout. We started working with Brdm2 mice (which we received from A Mills about 3 years ago) as a source of p63 KO mice. Extensive molecular and protein analysis of 26 different p63 Brdm2/Brdm2 embryos from multiple generations and multiple litters ranging from day E13 to P1 consistently revealed expression of aberrant truncated p63 variants, not confined to random epidermal patches but widespread, and associated with a transient phenotype consistent with residual functions of the targeted allele, as detailed below. We further showed that, in reporter assays, this Brdm2-derived p63 can both activate (as TAp63) and repress (as ANp63) a p53-responsive promoter. We therefore cannot help but maintain the notion that Brdm2 represents a functional aberrant hypomorphic allele but not a null allele.
DOI: 10.1038/19531
发表时间: 1999-04-22
期刊: NATURE
影响因子: 64.8
作者:
Mills, AA;Zheng, BH;Bradley, A
通讯作者: Bradley, A
DOI: 10.1002/dvg.20300
发表时间: 2007-05-01
期刊: GENESIS
影响因子: 1.5
作者:
Holcomb, Valerie B.;Kim, Tae Moon;Hasty, Paul
通讯作者: Hasty, Paul
DOI: 10.1038/cdd.2009.25
发表时间: 2009-08-01
影响因子: 12.4
作者:
Wolff, S.;Talos, F.;Moll, U. M.
通讯作者: Moll, U. M.
DOI: 10.1073/pnas.0602477103
发表时间: 2006-05-30
影响因子: 11.1
作者:
Keyes, William M.;Vogel, Hannes;Mills, Alea A.
通讯作者: Mills, Alea A.
DOI: 10.1038/sj.emboj.7601764
发表时间: 2007-07-25
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Ou, Horng Der;Loehr, Frank;Doetsch, Volker
通讯作者: Doetsch, Volker