ArticleMolecular medicine reports2022
NOX4 stimulates ANF secretion via activation of the Sirt1/Nrf2/ATF3/4 axis in hypoxic beating rat atria.
Article in Molecular medicine reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 6 citations in OpenAlex.
- Review
- The Dual Role of NOX4 in Cardiovascular Diseases: Driver of Oxidative Stress and Mediator of Adaptive Remodeling.Antioxidants (Basel, Switzerland) · 2025Review
- Therapeutic Targeting of Signaling Pathways in Abdominal Aortic Aneurysm: From Pathogenesis to Precision Medicine.Drug design, development and therapy · 2025Review
- SIRT1 activated by AROS sensitizes glioma cells to ferroptosis via induction of NAD+ depletion-dependent activation of ATF3.Redox biology · 2024Article
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Authors and funding
8 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Silent information regulator factor 2‑related enzyme 1 (Sirt1) is involved in the regulation of cell senescence, gene transcription, energy balance and oxidative stress. However, the effect of Sirt1 on atrial natriuretic factor (ANF) secretion, especially under hypoxic conditions is unclear. The present study aimed to investigate the effect of Sirt1, regulated by NADPH oxidase 4 (NOX4), on ANF secretion in isolated beating rat atria during hypoxia. ANF secretion was analyzed using radioimmunoassays and protein expression levels were determined by western blotting and immunofluorescence staining. Intra‑atrial pressure was recorded using a physiograph. Hypoxia significantly upregulated Sirt1 and nuclear factor erythroid‑2‑related factor 2 (Nrf2) protein expression levels, together with significantly increased ANF secretion. Hypoxia‑induced protein expression of Sirt1 was significantly blocked by a NOX4 inhibitor, GLX351322, and Nrf2 protein expression levels were significantly abolished using the Sirt1 inhibitor, EX527. Hypoxia also significantly elevated the protein expression levels of phosphorylated‑Akt and sequestosome 1 and significantly downregulated Kelch‑like ECH‑associated protein 1 protein expression levels. These effects were significantly blocked by EX527, preventing hypoxia‑induced Nrf2 expression. An Nrf2 inhibitor, ML385, significantly abolished the hypoxia‑induced upregulation of activating transcription factor (ATF)3, ATF4, T cell factor (TCF)3 and TCF4/lymphoid enhancer factor 1 (LEF1) protein expression levels, and significantly attenuated hypoxia‑induced ANF secretion. These results indicated that Sirt1 and Nrf2, regulated by NOX4, can potentially stimulate TCF3 and TCF4/LEF1 signaling via ATF3 and ATF4 activation, thereby potentially participating in the regulation of ANF secretion in beating rat atria during hypoxia. In conclusion, intervening with the Sirt1/Nrf2/ATF signaling pathway may be an effective strategy for resisting oxidative stress damage in the heart during hypoxia.
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