Differential roles of NF-Y transcription factor in ER chaperone expression and neuronal maintenance in the CNS.

Abstract:

:The mammalian central nervous system (CNS) contains various types of neurons with different neuronal functions. In contrast to established roles of cell type-specific transcription factors on neuronal specification and maintenance, whether ubiquitous transcription factors have conserved or differential neuronal function remains uncertain. Here, we revealed that inactivation of a ubiquitous factor NF-Y in different sets of neurons resulted in cell type-specific neuropathologies and gene downregulation in mouse CNS. In striatal and cerebellar neurons, NF-Y inactivation led to ubiquitin/p62 pathologies with downregulation of an endoplasmic reticulum (ER) chaperone Grp94, as we previously observed by NF-Y deletion in cortical neurons. In contrast, NF-Y inactivation in motor neurons induced neuronal loss without obvious protein deposition. Detailed analysis clarified downregulation of another ER chaperone Grp78 in addition to Grp94 in motor neurons, and knockdown of both ER chaperones in motor neurons recapitulated the pathology observed after NF-Y inactivation. Finally, additional downregulation of Grp78 in striatal neurons suppressed ubiquitin accumulation induced by NF-Y inactivation, implying that selective ER chaperone downregulation mediates different neuropathologies. Our data suggest distinct roles of NF-Y in protein homeostasis and neuronal maintenance in the CNS by differential regulation of ER chaperone expression.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yamanaka T,Tosaki A,Miyazaki H,Kurosawa M,Koike M,Uchiyama Y,Maity SN,Misawa H,Takahashi R,Shimogori T,Hattori N,Nukina N

doi

10.1038/srep34575

subject

Has Abstract

pub_date

2016-09-30 00:00:00

pages

34575

issn

2045-2322

pii

srep34575

journal_volume

6

pub_type

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