Sulforaphane accelerates acetaldehyde metabolism by inducing aldehyde dehydrogenases: relevance to ethanol intolerance.
Level 5 - mechanism / opinion, no new human data
Preclinical in vitro cell culture and animal model study
PubMed 23825090 · doi:10.1093/alcalc/agt063
What was done
Researchers tested sulforaphane and related Keap1/Nrf2/ARE pathway inducers for their capacity to induce aldehyde dehydrogenase (ALDH) and NQO1 in murine hepatoma Hepa1c1c7 cells. In vivo, CD-1 mice were fed sulforaphane at 5 or 20 µmol/day for 7 days prior to a single dose of ethanol, followed by assessment of tissue ALDH induction and acetaldehyde elimination pharmacokinetics.
What was found
Sulforaphane and other electrophilic Michael reaction acceptors induced ALDH via an Nrf2-dependent mechanism at potencies paralleling NQO1 induction. In mice, oral sulforaphane induced tissue ALDH and doubled the rate of acetaldehyde elimination following ethanol administration (exact baseline values, concentrations, and confidence intervals were not stated in the abstract).
Why it matters
These findings suggest that dietary Nrf2 activators can upregulate ALDH and accelerate acetaldehyde metabolism, indicating a possible mechanistic strategy to explore for alcohol intolerance.
Limits
The study is entirely preclinical, conducted in murine hepatoma cells and CD-1 mice, with no human testing. The abstract does not report sample sizes, variance, or exact pharmacokinetic concentrations, nor does it establish whether this induction can overcome human ALDH2*2 deficiency.
Cited by
- contradicts Sulforaphane bypasses the creation of aldehydes in the liver during alcohol metabolism.