Quercetin improves the activity of the ubiquitin-proteasomal system in 150Q mutated huntingtin-expressing cells but exerts detrimental effects on neuronal survivability.

Abstract excerpt

Quercetin, a strong free radical scavenger, is investigated for neuroprotective effects in a Neuro 2a cell line conditionally transfected with 16Q huntingtin (Htt) and 150Q Htt, which express the protein upon stimulation. Cells were protected from death by a 20-µM dose of quercetin on the second day of Htt induction, but 30-100-µM doses of the drug caused further toxicity in both 16Q and 150Q cells, as indicated...

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