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CRELD2 is a novel endoplasmic reticulum stress-inducible gene.

Oh-hashi K., Koga H., Ikeda S., Shimada K., Hirata Y., Kiuchi K.

Recently, endoplasmic reticulum (ER) stress responses have been suggested to play important roles in maintaining various cellular functions and to underlie many tissue dysfunctions. In this study, we first identified cysteine-rich with EGF-like domains 2 (CRELD2) as an ER stress-inducible gene by analyzing a microarray analysis of thapsigargin (Tg)-inducible genes in Neuro2a cells. CRELD2 mRNA is also shown to be immediately induced by treatment with the ER stress-inducing reagents tunicamycin and brefeldin A. In the genomic sequence of the mouse CRELD2 promoter, we found a typical ER stress responsible element (ERSE), which is well conserved among various species. Using a luciferase reporter analyses, we demonstrated that the ERSE in mouse CRELD2 is functional and responds to Tg and ATF6-overexpression. Each mutation of ATF6- or NF-Y-binding sites in the ERSE of the mouse CRELD2 promoter dramatically decreased both the basal activity and responsiveness toward the ER stress stimuli. Our study suggests that CRELD2 could be a novel mediator in regulating the onset and progression of various ER stress-associated diseases.

Biochem. Biophys. Res. Commun. 387:504-510(2009) [PubMed] [Europe PMC]

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