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Molecules 2014, 19(7), 10074-10089;

Molecular and Chemical Regulation of the Keap1-Nrf2 Signaling Pathway

College of Pharmacy, Dongguk University, 813-4 Siksa-dong, Goyang, Gyeonggi-do 410-820, Korea
Department of Pharmaceutical Science and Engineering, Seowon University, Cheongju, Chungbuk 361-742, Korea
Authors to whom correspondence should be addressed.
Received: 11 May 2014 / Revised: 2 June 2014 / Accepted: 2 July 2014 / Published: 10 July 2014
(This article belongs to the Special Issue Natural Antioxidants and Ageing)
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Extracellular and intracellular oxidants or electrophiles are key contributors to the damages in cellular macromolecules, such as DNA, proteins and lipids. Nrf2 is a master transcription factor that modulates a cellular antioxidant response program and plays an important role in the protection against oxidants and electrophiles. Keap1 is a regulator of Nrf2 by serving as a substrate adaptor for Cullin3-dependent E3 ubiquitin ligase. While Nrf2 activation is a feasible strategy for treatment of age-related diseases, aberrant Nrf2 activation also confers a selective growth advantage of tumor cells during chemotherapy or radiotherapy. In the present review, we provide an overview of the Keap1-Nrf2-ARE system, the domain organization of Nrf2 and Keap1, and the regulatory mechanisms of Nrf2 proteolysis by Keap1. We also discuss how Nrf2 prevents tumor promotion, hampers the sensitivity of selected tumors against chemotherapy or radiotherapy, and reprograms the metabolism to facilitate the tumor proliferation. Finally, we illustrate the current status in the development of Nrf2 chemical activators and inhibitors for the use of potential chemopreventive agents and chemotherapeutic adjuvants, respectively. View Full-Text
Keywords: Keap1; Nrf2; ARE; oncogene; tumor suppressor gene; metabolism Keap1; Nrf2; ARE; oncogene; tumor suppressor gene; metabolism

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Keum, Y.-S.; Choi, B.Y. Molecular and Chemical Regulation of the Keap1-Nrf2 Signaling Pathway. Molecules 2014, 19, 10074-10089.

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