AI Article Synopsis
- Researchers developed new quercetin derivatives by blocking its unstable hydroxyl groups with a promotional chemical (POM) to create two stable forms (7-O-POM-Q and 3-O-POM-Q).
- These modified forms showed significantly longer stability in cell culture media, with a half-life of up to 52 hours, compared to the original quercetin which lasted less than 30 minutes.
- While one of the conjugates effectively entered cells and maintained quercetin levels for 12 hours, it still needs improvement for better cell membrane penetration, suggesting more studies on different modifications are needed.
Article Abstract
In order to increase stability of quercetin, its metabolically and chemically susceptible hydroxyl groups 7-OH and 3-OH respectively were transiently blocked with a pivaloxymethyl (POM) promoiety to provide two novel quercetin conjugates [7-O-POM-Q, 3-O-POM-Q]. In the absence of stabilizer (ascorbic acid), the synthesized conjugates showed significantly increased stability in cell culture media [t(½) = 4 h, 52 h] compared with quercetin (t(½) < 30 min) and quercetin prodrug 1 (t(½) = 0.8 h). In addition, the quercetin conjugate 2 underwent efficient cellular uptake and intracellular levels of its hydrolysis product, quercetin, were maintained up to 12 h. Stability and intracellular accumulation of were demonstrated by its stabilizer-independent cytostatic effect and induction of apoptotic cell death. Even though was more stable than, it failed to penetrate cell membranes. However, the remarkable stability of warrants further investigation of quercetin conjugates with various promoieties at the 3-OH position.
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| http://dx.doi.org/10.1021/jm101252m | DOI Listing |
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