Abstract
The heme oxygenase-1 (HO-1) enzyme catalyzes the rate-limiting reaction in the catabolism of heme yielding products with pleiotropic, but ultimately, cytoprotective activities. High levels of HO-1 are frequently detected in various pathological states and generally in states of cellular oxidative stress. Induction of HO-1, regulated at the level of gene transcription, is essential for manifestation of the enzymes cytoprotective function. Extensive analysis of the mouse gene, and to a lesser extent of the human gene, has identified a common mechanism - the stress response element (StRE) / Nrf2 transcription factor pathway - for gene regulation in response to a diverse array of HO-1 inducers including the substrate heme, various environmental and industrial toxins, and plant-derived polyphenolic compounds. In addition to Nrf2 complexes, numerous dimeric transcription factors bind to the StRE, permitting induction, repression and overall fine-tuning of gene activity. In principle, the multiplicity of StRE binding proteins also provides for a range of pharmaceutical targets for controlled production of the potentially therapeutic HO-1 protein.
Keywords: heme oxygenase, oxidative stress, stress response elements, basic-leucine zipper proteins, nrf2, maf, bach1
Current Pharmaceutical Design
Title: Transcriptional Regulation of the Heme Oxygenase-1 Gene Via the Stress Response Element Pathway
Volume: 9 Issue: 30
Author(s): J. Alam and J. L. Cook
Affiliation:
Keywords: heme oxygenase, oxidative stress, stress response elements, basic-leucine zipper proteins, nrf2, maf, bach1
Abstract: The heme oxygenase-1 (HO-1) enzyme catalyzes the rate-limiting reaction in the catabolism of heme yielding products with pleiotropic, but ultimately, cytoprotective activities. High levels of HO-1 are frequently detected in various pathological states and generally in states of cellular oxidative stress. Induction of HO-1, regulated at the level of gene transcription, is essential for manifestation of the enzymes cytoprotective function. Extensive analysis of the mouse gene, and to a lesser extent of the human gene, has identified a common mechanism - the stress response element (StRE) / Nrf2 transcription factor pathway - for gene regulation in response to a diverse array of HO-1 inducers including the substrate heme, various environmental and industrial toxins, and plant-derived polyphenolic compounds. In addition to Nrf2 complexes, numerous dimeric transcription factors bind to the StRE, permitting induction, repression and overall fine-tuning of gene activity. In principle, the multiplicity of StRE binding proteins also provides for a range of pharmaceutical targets for controlled production of the potentially therapeutic HO-1 protein.
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Cite this article as:
Alam J. and Cook L. J., Transcriptional Regulation of the Heme Oxygenase-1 Gene Via the Stress Response Element Pathway, Current Pharmaceutical Design 2003; 9 (30) . https://dx.doi.org/10.2174/1381612033453730
DOI https://dx.doi.org/10.2174/1381612033453730 |
Print ISSN 1381-6128 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4286 |
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