Mechanisms of Nrf2/Keap1-dependent phase II cytoprotective and detoxifying gene expression and potential cellular targets of chemopreventive isothiocyanates.
Level 5 - mechanism / opinion, no new human data
Narrative review of cellular and molecular mechanisms
PubMed 23781297 · doi:10.1155/2013/839409
What was done
This narrative review synthesized mechanistic literature examining how natural isothiocyanates (ITCs) derived from cruciferous vegetables regulate the Keap1/Nrf2 pathway. The authors reviewed intracellular signaling kinase cascades, potential cellular protein conjugation targets of ITCs, posttranslational modifications of Keap1, and the nucleocytoplasmic trafficking of Nrf2.
What was found
The abstract provides no quantitative data or numerical findings. It qualitatively reports that natural ITCs activate Nrf2/ARE-dependent phase II cytoprotective and detoxifying gene expression, directly conjugate to cellular protein targets, and modify Keap1 to facilitate Nrf2 nuclear translocation and cellular defense against oxidants and electrophiles.
Why it matters
Understanding the biochemical interactions between dietary isothiocyanates and the Keap1/Nrf2 axis helps clarify the biological plausibility behind epidemiological associations between cruciferous vegetable intake and reduced cancer risk.
Limits
The abstract describes a non-systematic narrative review with no defined search protocol, study count, or quality assessment. It contains no human clinical outcome data or direct experimental measurements of pharmacokinetic parameters such as effective dose or bioavailability.
Cited by
- supports Cruciferous vegetables contain compounds that upregulate stage II liver detoxification conjugation.