miR-4734 conditionally suppresses ER stress-associated proinflammatory responses

Dan Michael, Ester Feldmesser, Chagay Gonen, Noa Furth, Alexander Maman, Ori Heyman, Amir Argoetti, Adin Tofield, Amichai Baichman-Kass, Aviyah Ben-Dov, Dan Benbenisti, Nadav Hen, Ron Rotkopf, Federica Ganci, Giovanni Blandino, Igor Ulitsky, Moshe Oren

Research output: Contribution to journalArticlepeer-review

Abstract

Prolonged metabolic stress can lead to severe pathologies. In metabolically challenged primary fibroblasts, we assigned a novel role for the poorly characterized miR-4734 in restricting ATF4 and IRE1-mediated upregulation of a set of proinflammatory cytokines and endoplasmic reticulum stress-associated genes. Conversely, inhibition of this miRNA augmented the expression of those genes. Mechanistically, miR-4734 was found to restrict the expression of the transcriptional activator NF-kappa-B inhibitor zeta (NFKBIZ), which is required for optimal expression of the proinflammatory genes and whose mRNA is targeted directly by miR-4734. Concordantly, overexpression of NFKBIZ compromised the effects of miR-4734, underscoring the importance of this direct targeting. As the effects of miR-4734 were evident under stress but not under basal conditions, it may possess therapeutic utility towards alleviating stress-induced pathologies.

Original languageEnglish
Pages (from-to)1233-1245
Number of pages13
JournalFEBS Letters
Volume597
Issue number9
DOIs
StatePublished - May 2023

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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