Abstract
In this study, the effect of myrosinase-treated glucoerucin (GER+MYR), which releases the isothiocyanate (ITC) erucin, on heme oxygenase 1 (HO-1) gene expression and Nrf2 signaling was investigated in vitro in cultured cells and in vivo in mice. Treatment of HT-29 cells with GER+MYR resulted in a significant increase in the mRNA and protein levels of nuclear Nrf2 and HO-1. GER+MYR was more potent at enhancing the nuclear Nrf2 levels than were the following myrosinase-treated glucosinolates: sinigrin, glucoraphanin and gluconasturtiin, which are the precursors of allyl-ITC, R-sulforaphane and 2-phenylethyl ITC, respectively. GER+MYR also significantly induced HO-1 gene expression in the mouse intestinal mucosae and liver but not in the brain. Mechanistic studies suggest that GER+MYR induces Nrf2 via ERK1/2-, p38- and JNK-dependent signal transduction pathways. The GER+MYR-mediated increase in HO-1 expression is primarily attributable to p38 signaling.
Keywords:
Glucoerucin; Glucosinolates; Heme oxygenase 1; MAPK; Myrosinase; Nrf2.
Copyright © 2015 Elsevier Inc. All rights reserved.
MeSH terms
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Animals
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Brain / drug effects
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Brain / metabolism
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Diet, High-Fat / adverse effects
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Female
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Glucose / analogs & derivatives*
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Glucose / pharmacology
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Glucosinolates / pharmacology
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Glycoside Hydrolases / pharmacology
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HT29 Cells
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Heme Oxygenase-1 / genetics
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Heme Oxygenase-1 / metabolism*
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Humans
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Imidoesters / pharmacology*
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Intestinal Mucosa / metabolism
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Intestines / drug effects
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Isothiocyanates / metabolism
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Liver / drug effects
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Liver / metabolism
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Membrane Proteins / genetics
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Membrane Proteins / metabolism
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Mice
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Mice, Inbred C57BL
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Mitogen-Activated Protein Kinase 3 / genetics
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Mitogen-Activated Protein Kinase 3 / metabolism
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Mustard Plant / chemistry
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NF-E2-Related Factor 2 / genetics
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NF-E2-Related Factor 2 / metabolism*
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Oximes
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Plant Extracts / pharmacology
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RNA, Messenger / genetics
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RNA, Messenger / metabolism
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Signal Transduction
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Sulfoxides
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Up-Regulation
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p38 Mitogen-Activated Protein Kinases / genetics
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p38 Mitogen-Activated Protein Kinases / metabolism
Substances
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Glucosinolates
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Imidoesters
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Isothiocyanates
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Membrane Proteins
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NF-E2-Related Factor 2
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NFE2L2 protein, human
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Nfe2l2 protein, mouse
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Oximes
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Plant Extracts
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RNA, Messenger
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Sulfoxides
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gluconasturtiin
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glucoerucin
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sinigrin
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phenethyl isothiocyanate
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allyl isothiocyanate
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HMOX1 protein, human
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Heme Oxygenase-1
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Hmox1 protein, mouse
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Mitogen-Activated Protein Kinase 3
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p38 Mitogen-Activated Protein Kinases
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Glycoside Hydrolases
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thioglucosidase
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sulforaphane
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Glucose
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glucoraphanin