Polynucleotide kinase-phosphatase (PNKP) mutations and neurologic disease.

Polynucleotide kinase-phosphatase (PNKP) mutations and neurologic disease.
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DOI:
10.1016/j.mad.2016.04.009
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发表时间:
2017-01
影响因子:
5.3
通讯作者:
McKinnon, Peter J.
McKinnon, Peter J.
中科院分区:
医学3区
文献类型:
--
作者:
Dumitrache, Lavinia C.;McKinnon, Peter J.

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多种人类神经系统疾病是由DNA修复的遗传缺陷引起的。在许多情况下,这些综合征几乎完全影响神经系统,强调了该组织中基因组稳定性的关键要求。一个突出的例子是多核苷酸激酶-磷酸酶(PNKP)的酶活性缺陷,导致小头畸形或神经变性。值得注意的是,PNKP突变的广泛神经影响可能导致明显不同的疾病实体,即使遗传突变是相同的。例如,小头畸形伴癫痫发作(MCSZ)是由各种亚形态PNKP突变引起的,共济失调伴眼用不能4(AOA 4)也是如此。因此,当PNKP被禁用时,其他促成因素影响神经表型。在这里,我们考虑PNKP在维持脑功能中的作用,以及其活性的扰动如何解释MCSZ和AOA 4中存在的神经变性或小头畸形的不同病理。
A variety of human neurologic diseases are caused by inherited defects in DNA repair. In many cases, these syndromes almost exclusively impact the nervous system, underscoring the critical requirement for genome stability in this tissue. A striking example of this is defective enzymatic activity of polynucleotide kinase-phosphatase (PNKP), leading to microcephaly or neurodegeneration. Notably, the broad neural impact of mutations in PNKP can result in markedly different disease entities, even when the inherited mutation is the same. For example microcephaly with seizures (MCSZ) results from various hypomorphic PNKP mutations, as does ataxia with oculomotor apraxia 4 (AOA4). Thus, other contributing factors influence the neural phenotype when PNKP is disabled. Here we consider the role for PNKP in maintaining brain function and how perturbation in its activity can account for the varied pathology of neurodegeneration or microcephaly present in MCSZ and AOA4 respectively.
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