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CUEDC2 modulates cardiomyocyte oxidative capacity by regulating GPX1 stability.

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  • معلومة اضافية
    • المصدر:
      Publisher: Wiley-Blackwell Country of Publication: England NLM ID: 101487380 Publication Model: Electronic-Print Cited Medium: Internet ISSN: 1757-4684 (Electronic) Linking ISSN: 17574676 NLM ISO Abbreviation: EMBO Mol Med Subsets: MEDLINE
    • بيانات النشر:
      Original Publication: Chichester, West Sussex : Wiley-Blackwell
    • الموضوع:
    • نبذة مختصرة :
      The irreversible loss of cardiomyocytes due to oxidative stress is the main cause of heart dysfunction following ischemia/reperfusion (I/R) injury and ageing-induced cardiomyopathy. Here, we report that CUEDC2, a CUE domain-containing protein, plays a critical role in oxidative stress-induced cardiac injury. Cuedc2(-/-) cardiomyocytes exhibited a greater resistance to oxidative stress-induced cell death. Loss of CUEDC2 enhanced the antioxidant capacity of cardiomyocytes, promoted reactive oxygen species (ROS) scavenging, and subsequently inhibited the redox-dependent activation of signaling pathways. Notably, CUEDC2 promoted E3 ubiquitin ligases tripartite motif-containing 33 (TRIM33)-mediated the antioxidant enzyme, glutathione peroxidase 1 (GPX1) ubiquitination, and proteasome-dependent degradation. Ablation of CUEDC2 upregulated the protein level of GPX1 in the heart significantly. Strikingly, in vivo, the infarct size of Cuedc2(-/-) heart was significantly decreased after I/R injury, and aged Cuedc2(-/-) mice preserved better heart function as the overall ROS levels in their hearts were significantly lower. Our results demonstrated a novel role of CUEDC2 in cardiomyocyte death regulation. Manipulating CUEDC2 level might be an attractive therapeutic strategy for promoting cardiomyocyte survival following oxidative stress-induced cardiac injury.
      (© 2016 The Authors. Published under the terms of the CC BY 4.0 license.)
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    • Contributed Indexing:
      Keywords: CUEDC2; GPX1; ageing‐induced cardiomyopathy; antioxidant capacity; ischemia/reperfusion injury
    • الرقم المعرف:
      0 (CUEDC2 protein, mouse)
      0 (Reactive Oxygen Species)
      0 (Repressor Proteins)
      EC 1.11.1.9 (Glutathione Peroxidase)
      EC 1.11.1.9 (Glutathione Peroxidase GPX1)
      EC 1.11.1.9 (Gpx1 protein, mouse)
    • الموضوع:
      Date Created: 20160612 Date Completed: 20170913 Latest Revision: 20221207
    • الموضوع:
      20221213
    • الرقم المعرف:
      PMC4931293
    • الرقم المعرف:
      10.15252/emmm.201506010
    • الرقم المعرف:
      27286733