Bioinformatic Characterization of Regulated IRE1a-Dependent Decay (RIDD) in Heart Failure
Bhattarai, N.; Kendi, A.; Stoner, M.; Shiva, S.; Kaufman, B. A.; Scott, I.
Show abstract
Inositol-requiring enzyme 1a (IRE1a) is a canonical signaling factor in the unfolded protein response (UPR). In addition to this essential role (which prevents the accumulation of misfolded proteins in the endoplasmic reticulum), the endoribonuclease activity of IRE1a targets multiple mRNAs for degradation through a process called Regulated IRE1a-Dependent Decay (RIDD). The products of over 50 genes have been identified as RIDD targets; however, the biological significance of this process remains underexplored. Using publicly available datasets, we examined the fate of 27 well-characterized RIDD targets in the septal wall of heart failure patients, and in mice subject to pressure overload-induced heart failure. We show that decreased mRNA abundance from these RIDD substrate genes - an outcome consistent with RIDD induction - is commonly observed in heart failure.
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