Palmitoylation-dependent neurodevelopmental deficits in a mouse model of 22q11 microdeletion.

Palmitoylation-dependent neurodevelopmental deficits in a mouse model of 22q11 microdeletion.
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DOI:
10.1038/nn.2204
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发表时间:
2008-11
影响因子:
25
通讯作者:
Gogos, Joseph A.
Gogos, Joseph A.
中科院分区:
医学1区
文献类型:
--
作者:
Mukai, Jun;Dhilla, Alefiya;Drew, Liam J.;Stark, Kimberly L.;Cao, Luxiang;MacDermott, Amy B.;Karayiorgou, Maria;Gogos, Joseph A.

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具有22q11.2微缺失的个体具有认知缺陷和患精神分裂症的高风险。在这里,我们提供的证据表明,22q11.2缺失小鼠模型[Df(16)A+/−]的原代海马神经元树突棘和突触的密度降低,以及树突生长受损。这些缺陷可以通过引入由位于22q11.2位点的基因编码的酶活性ZDHHC 8棕榈酰转移酶来预防,并且在Zdhhc 8缺陷小鼠的原代培养物中也观察到这些缺陷。我们发现,许多这些缺陷也存在于成年Df(16)A+/−和Zdhhc 8缺陷小鼠的海马体中。最后,我们提供的证据表明,PSD 95是ZDHHC 8的底物之一。我们的分析表明,22q11.2微缺失导致神经元发育缺陷,并表明受损的神经元蛋白棕榈酰化有助于许多这些缺陷。
Individuals with 22q11.2 microdeletions have cognitive deficits and a high risk of developing schizophrenia. Here, we provide evidence that primary hippocampal neurons from a 22q11.2 deletion mouse model [Df(16)A+/−] have decreased density of dendritic spines and glutamatergic synapses, as well as impaired dendritic growth. These deficits can be prevented by introduction of enzymatically active ZDHHC8 palmitoyltransferase encoded by a gene located in the 22q11.2 locus and they are also observed in primary cultures from Zdhhc8-deficient mice. We show that many of these deficits are also present in the hippocampus of adult Df(16)A+/− and Zdhhc8-deficient mice. Finally, we provide evidence that PSD95 is one of the substrates of ZDHHC8. Our analysis reveals that 22q11.2 microdeletion results in deficits in neuronal development and suggests that impaired neuronal protein palmitoylation contributes to many of these deficits.
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