Soluble alpha-APP (sAPPalpha) regulates CDK5 expression and activity in neurons.

Soluble alpha-APP (sAPPalpha) regulates CDK5 expression and activity in neurons.
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DOI:
10.1371/journal.pone.0065920
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Rohe M
Rohe M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hartl D;Klatt S;Roch M;Konthur Z;Klose J;Willnow TE;Rohe M

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越来越多的证据表明可溶性α-淀粉样蛋白前体蛋白(sAPP α)在阿尔茨海默病(AD)的病理机制中的作用。APP的这种裂解产物被鉴定为具有神经营养特性。然而,sAPPalpha靶向的蛋白质可能参与这种神经保护作用仍然是个谜。在这里,我们使用高分辨率二维聚丙烯酰胺凝胶电泳分析神经元中sAPPalpha下游的蛋白质组变化。我们提出的证据表明,sAPPalpha调节CDK 5的表达和活性,CDK 5是一种在AD病理学中起重要作用的激酶。我们还确定了由sAPP α诱导的细胞保护性伴侣ORP 150作为这种保护性反应的一部分。最后,我们提出的功能证据表明,sAPPalpha受体SORLA是必不可少的介导的sAPPalpha在神经元中的分子功能。
A growing body of evidence suggests a role for soluble alpha-amyloid precursor protein (sAPPalpha) in pathomechanisms of Alzheimer disease (AD). This cleavage product of APP was identified to have neurotrophic properties. However, it remained enigmatic what proteins, targeted by sAPPalpha, might be involved in such neuroprotective actions. Here, we used high-resolution two-dimensional polyacrylamide gel electrophoresis to analyze proteome changes downstream of sAPPalpha in neurons. We present evidence that sAPPalpha regulates expression and activity of CDK5, a kinase that plays an important role in AD pathology. We also identified the cytoprotective chaperone ORP150 to be induced by sAPPalpha as part of this protective response. Finally, we present functional evidence that the sAPPalpha receptor SORLA is essential to mediate such molecular functions of sAPPalpha in neurons.
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