Plzf regulates limb and axial skeletal patterning

Plzf regulates limb and axial skeletal patterning
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DOI:
10.1038/76014
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发表时间:
2000-06-01
期刊:
影响因子:
30.8
通讯作者:
Pandolfi, PP
Pandolfi, PP
中科院分区:
生物学1区
文献类型:
--
作者:
Barna, M;Hawe, N;Pandolfi, PP

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早幼粒细胞白血病锌指 (Plzf) 蛋白(由 Zfp 145 基因编码)属于 POZ/锌指转录因子家族。在这里,我们生成了 Zfp 145(-/-) 小鼠,并表明 Plzf 对于肢体和中轴骨骼的图案化至关重要。 Plzf 失活会导致影响肢体所有骨骼结构的模式缺陷,包括前部骨骼元件向后部结构的同源转化。我们证明 Plzf 在肢芽中充当生长抑制和促凋亡因子。腹部 b (Abdb) Hox 基因复合体成员以及编码骨形态发生蛋白 (Bmps) 的基因的表达。 Zfp 145(-/-) 小鼠的发育肢体发生改变。 Plzf 在没有异常极化活性的情况下调节这些基因的表达,并且独立于已知的模式基因。 Zfp145(-/-) 小鼠还表现出整个中轴骨骼的前向同源异型转化以及相关的 Hox 基因表达变化。因此,Plzf 是中轴骨骼和附肢骨骼中前后 (AP) 模式的介导者,并充当 Hox 基因表达的调节者。
The promyelocytic leukaemia zinc finger (Plzf) protein (encoded by the gene Zfp 145) belongs to the POZ/zinc-finger family of transcription factors. Here we generate Zfp 145(-/-) mice and show that Plzf is essential for patterning of the limb and axial skeleton. Plzf inactivation results in patterning defects affecting all skeletal structures of the limb, including homeotic transformations of anterior skeletal elements into posterior structures. We demonstrate that Plzf acts as a growth-inhibitory and pro-apoptotic factor in the limb bud. The expression of members of the abdominal b (Abdb) Hox gene complex, as well as genes encoding bone morphogenetic proteins (Bmps). is altered in the developing limb of Zfp 145(-/-) mice. Plzf regulates the expression of these genes in the absence of aberrant polarizing activity and independently of known patterning genes. Zfp145(-/-) mice also exhibit anterior-directed homeotic transformation throughout the axial skeleton with associated alterations in Hox gene expression. Plzf is therefore a mediator of anterior-to-posterior (AP) patterning in both the axial and appendicular skeleton and acts as a regulator of Hox gene expression.