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Research ArticleArticle

Caffeic Acid Phenethyl Ester and Curcumin: A Novel Class of Heme Oxygenase-1 Inducers

G. Scapagnini, R. Foresti, V. Calabrese, A. M. Giuffrida Stella, C. J. Green and R. Motterlini
Molecular Pharmacology March 2002, 61 (3) 554-561; DOI: https://doi.org/10.1124/mol.61.3.554
G. Scapagnini
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V. Calabrese
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This article has a correction. Please see:

  • Correction to “Caffeic Acid Phenethyl Ester and Curcumin: A Novel Class of Heme Oxygenase-1 Inducers” - May 01, 2002

Abstract

Heme oxygenase-1 (HO-1) is a redox-sensitive inducible protein that provides efficient cytoprotection against oxidative stress. Curcumin, a polyphenolic natural compound that possesses anti-tumor and anti-inflammatory properties, has been reported recently to induce potently HO-1 expression in vascular endothelial cells (Free Rad Biol Med 28:1303–1312, 2000). Here, we extend our previous findings by showing that caffeic acid phenethyl ester (CAPE), another plant-derived phenolic agent, markedly increases heme oxygenase activity and HO-1 protein in astrocytes. The effect seems to be related to the peculiar chemical structures of curcumin and CAPE, because analogous antioxidants containing only portions of these two molecules were totally ineffective. At a final concentration of 30 μM, both curcumin and CAPE maximally up-regulated heme oxygenase activity while promoting marked cytotoxicity at higher concentrations (50–100 μM). Similar results were obtained with Curcumin-95, a mixture of curcuminoids commonly used as a dietary supplement. Incubation of astrocytes with curcumin or CAPE at concentrations that promoted maximal heme oxygenase activity resulted in an early increase in reduced glutathione followed by a significant elevation in oxidized glutathione contents. A curcumin-mediated increase in heme oxygenase activity was not affected by the glutathione precursor and thiol donorN-acetyl-l-cysteine. These data suggest that regulation of HO-1 expression by polyphenolic compounds is evoked by a distinctive mechanism which is not necessarily linked to changes in glutathione but might depend on redox signals sustained by specific and targeted sulfydryl groups. This study identifies a novel class of natural substances that could be used for therapeutic purposes as potent inducers of HO-1 in the protection of tissues against inflammatory and neurodegenerative conditions.

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Molecular Pharmacology: 61 (3)
Molecular Pharmacology
Vol. 61, Issue 3
1 Mar 2002
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Research ArticleArticle

Caffeic Acid Phenethyl Ester and Curcumin: A Novel Class of Heme Oxygenase-1 Inducers

G. Scapagnini, R. Foresti, V. Calabrese, A. M. Giuffrida Stella, C. J. Green and R. Motterlini
Molecular Pharmacology March 1, 2002, 61 (3) 554-561; DOI: https://doi.org/10.1124/mol.61.3.554

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Research ArticleArticle

Caffeic Acid Phenethyl Ester and Curcumin: A Novel Class of Heme Oxygenase-1 Inducers

G. Scapagnini, R. Foresti, V. Calabrese, A. M. Giuffrida Stella, C. J. Green and R. Motterlini
Molecular Pharmacology March 1, 2002, 61 (3) 554-561; DOI: https://doi.org/10.1124/mol.61.3.554
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