Centronuclear myopathy in Labrador retrievers: a recent founder mutation in the PTPLA gene has rapidly disseminated worldwide.

Centronuclear myopathy in Labrador retrievers: a recent founder mutation in the PTPLA gene has rapidly disseminated worldwide.
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DOI:
10.1371/journal.pone.0046408
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Tiret L
Tiret L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Maurer M;Mary J;Guillaud L;Fender M;Pelé M;Bilzer T;Olby N;Penderis J;Shelton GD;Panthier JJ;Thibaud JL;Barthélémy I;Aubin-Houzelstein G;Blot S;Hitte C;Tiret L

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中枢性肌病(CNM)是一种遗传性先天性疾病,其特征是过多的内化核。在人类中,CNM是由来自肌管蛋白、发动蛋白和两性蛋白家族的三个主要基因中的1070个突变引起的。对这些基因表达改变的动物模型的分析揭示了所有形式的CNM的共同缺陷,为统一的致病和治疗机制铺平了道路。尽管作出了这些努力,但全国妇女委员会的一些案件仍然没有得到遗传学上的解决。我们以前确定了一个常染色体隐性形式的CNM在法国拉布拉多寻回犬的实验系谱,并表明,在蛋白酪氨酸磷酸酶样A(PTPLA)基因的功能丧失突变与CNM分离。在世界各地,客户拥有的拉布拉多寻回犬在肌肉活检中具有相似的临床表现和组织病理学变化。我们假设这些拉布拉多犬具有相同的PTPLAcnm突变。对由7,426只拉布拉多犬组成的国际小组进行基因分型,发现了13个国家的PTPLAcnm携带者。单倍型分析表明,PTPLAcnm等位基因是由一个单一的和最近的突变事件,可能已迅速传播,通过广泛使用流行的父系。PTPLA缺陷的拉布拉多将有助于确定PTPLA在现有的CNM基因网络中的综合作用。它们将是有价值的补充大型动物模型,以测试CNM中的创新疗法。
Centronuclear myopathies (CNM) are inherited congenital disorders characterized by an excessive number of internalized nuclei. In humans, CNM results from ∼70 mutations in three major genes from the myotubularin, dynamin and amphiphysin families. Analysis of animal models with altered expression of these genes revealed common defects in all forms of CNM, paving the way for unified pathogenic and therapeutic mechanisms. Despite these efforts, some CNM cases remain genetically unresolved. We previously identified an autosomal recessive form of CNM in French Labrador retrievers from an experimental pedigree, and showed that a loss-of-function mutation in the protein tyrosine phosphatase-like A (PTPLA) gene segregated with CNM. Around the world, client-owned Labrador retrievers with a similar clinical presentation and histopathological changes in muscle biopsies have been described. We hypothesized that these Labradors share the same PTPLAcnm mutation. Genotyping of an international panel of 7,426 Labradors led to the identification of PTPLAcnm carriers in 13 countries. Haplotype analysis demonstrated that the PTPLAcnm allele resulted from a single and recent mutational event that may have rapidly disseminated through the extensive use of popular sires. PTPLA-deficient Labradors will help define the integrated role of PTPLA in the existing CNM gene network. They will be valuable complementary large animal models to test innovative therapies in CNM.
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