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Perez-Leal O , Barrero CA , Merali S
Pharmacological stimulation of nuclear factor (erythroid-derived 2)-like 2 translation activates antioxidant responses
J Biol Chem. 2017 Jul 06;292(34) :14108-14121
PMID: 28684421    PMCID: PMC5572918    URL: https://www.ncbi.nlm.nih.gov/pubmed/28684421
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Abstract
Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is the master regulator of the antioxidant response, and its function is tightly regulated at the transcriptional, translational, and post- translational levels. It is well known that Nrf2 is regulated at the protein level by proteasomal degradation via Kelch-like ECH-associated protein 1 (Keap1), but how Nrf2 is regulated at the translational level is less clear. Here, we show that pharmacological stimulation increases Nrf2 levels by overcoming basal translational repression. We developed a novel reporter assay that enabled identification of natural compounds that induce Nrf2 translation by a mechanism independent of Keap1-mediated degradation. Apigenin, resveratrol, and piceatannol all induced Nrf2 translation. More importantly, the pharmacologically induced Nrf2 overcomes Keap1 regulation, translocates to the nucleus, and activates the antioxidant response. W e conclude that translational regulation controls physiological levels of Nrf2 and this can be modulated by apigenin, resveratrol, and piceatannol. Also, targeting this mechanism with novel compounds could provide new insights into prevention and treatment of multiple diseases in which oxidative stress plays a significant role.
Notes
1083-351x Perez-Leal, Oscar ORCID: http://orcid.org/0000-0002-5641-0311 Barrero, Carlos Alberto Merali, Salim Journal Article United States J Biol Chem. 2017 Jul 6. pii: jbc.M116.770925. doi: 10.1074/jbc.M116.770925.