Neuronal gene repression in Niemann-Pick type C models is mediated by the c-Abl/HDAC2 signaling pathway.
Neuronal gene repression in Niemann-Pick type C models is mediated by the c-Abl/HDAC2 signaling pathway.
复制标题
Niemann-Pick型C模型中的神经元基因抑制是由C-ABL/HDAC2信号通路介导的。
DOI:
10.1016/j.bbagrm.2015.11.006
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发表时间:
2016-02
影响因子:
4.7
通讯作者:
Zanlungo, Silvana
中科院分区:
文献类型:
--
作者:
Contreras, Pablo S.;Gonzalez-Zuniga, Marcelo;Gonzalez-Hodar, Lila;Jose Yanez, Maria;Dulcey, Andres;Marugan, Juan;Seto, Edward;Alvarez, Alejandra R.;Zanlungo, Silvana
关键词:
Niemann-Pick type C (NPC) disease is a fatal neurodegenerative disorder characterized by the accumulation of free cholesterol in lysosomes. There are currently no effective FDA-approved treatments for NPC, although in the last years the inhibition of Histone Deacetylases (HDACs) has emerged as a potential treatment for this disease. However, the molecular mechanisms that deregulate HDACs activity in NPC disease are unknown. Previously our group had shown that the proapoptotic tyrosine kinase c-Abl signaling is activated in NPC neurons. Here, we demonstrate that c-Abl activity increases HDAC2 levels inducing neuronal gene repression of key synaptic genes in NPC models. Our data show that: i) HDAC2 levels and activity are increased in NPC neuronal models and in Npc1-/- mice; ii) inhibition of c-Abl or c-Abl deficiency prevents the increase of HDAC2 protein levels and activity in NPC neuronal models; iii) c-Abl inhibition decreases the levels of HDAC2 tyrosine phosphorylation; iv) treatment with methyl-β-cyclodextrin and Vitamin E decrease the activation of the c-Abl/HDAC2 pathway in NPC neurons; v) in vivo treatment with two c-Abl inhibitors prevents the increase of HDAC2 protein levels in the brain of Npc1-/- mice and, vi) c-Abl inhibition prevents HDAC2 recruitment to the promoter of neuronal genes, triggering an increase in their expression. our data show the involvement of the c-Abl/HDAC2 signaling pathway in the regulation of neuronal gene expression in NPC neuronal models. Thus, inhibition of c-Abl could be a pharmacological target for preventing the deleterious effects of increased HDAC2 levels in NPC disease.
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影响因子:
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作者:
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通讯作者:
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DOI:
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DOI:
10.1016/j.bbadis.2011.11.009
发表时间:
2012-02-01
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通讯作者:
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通讯作者:
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