Abstract:
:Activating transcription factor 4 (ATF4), which is ubiquitously expressed, plays a crucial role in regulating various stress-responsive genes under pathophysiological conditions. Further, growth arrest and DNA damage-inducible gene 34 (GADD34), a downstream target of ATF4, has been reported to negatively regulate ATF4 expression. To understand the relationship between intrinsic ATF4 and GADD34 under resting and ER stress conditions, we used a novel gene editing approach, CRISPR/Cas9, to integrate antibiotic-resistant genes into the target genes, ATF4 and GADD34. First, we manipulated the ATF4 gene in the mouse neuroblastoma cell line, Neuro2a, and compared the ER stress responses between parental and ATF4-edited Neuro2a cells. Next, we established Neuro2a cells with edited GADD34 and ATF4/GADD34 genes and found that ATF4 acts as a proapoptotic factor, but GADD34 depletion did not attenuate the expression of cleaved caspase-3 induced by tunicamycin treatment. These findings provide new insights into the ATF4 signaling cascades. Additionally, the rapid establishment of cells lacking multiple genes using this CRISPR/Cas9 system will be a powerful tool for exploring various cellular issues under pathophysiological conditions.
journal_name
Mol Cell Biochemjournal_title
Molecular and cellular biochemistryauthors
Oh-Hashi K,Sugiura N,Amaya F,Isobe KI,Hirata Ydoi
10.1007/s11010-017-3156-0subject
Has Abstractpub_date
2018-03-01 00:00:00pages
65-75issue
1-2eissn
0300-8177issn
1573-4919pii
10.1007/s11010-017-3156-0journal_volume
440pub_type
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