structure-activity relationship of eight high content flavonoids analyzed with a preliminary assign-score method and their contribution to antioxidant ability of flavonoids-rich extract from scutellaria baicalensis shoots
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ID: 239068
2018
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Abstract
Investigation of flavonoids-rich extract from Scutellaria baicalensis shoots shows that 15 of the 19 flavonoids detected with UPLC-Q-TOF-MS were identified, and it exhibited high antioxidant abilities with IC50 at 70.81, 35.34 and 33.27 μg/mL in DPPH, ABTS and CAA assays, respectively. An order of antioxidant abilities in scavenging DPPH· and ABTS+· of eight high content flavonoids in the extract was the same, and it could be well-explained by a preliminary assign-score method we created in structure-activity relationship analyses specific for flavonoids, revealing that double bonds and phenolic hydroxyls on rings A and B are augmentors, and sugar moiety is an attenuator influencing antioxidant capacity but might contribute positively in CAA assays. In addition, three of the eight flavonoids (baicalein, baicalin and scutellarin) made contributions of 58.33%, 60.36% and 51.41% to overall antioxidant activity of the flavonoids-rich extract in DPPH, ABTS and CAA assays, respectively, thus were determined as the primary or marker flavonoids of Scutellaria baicalensis shoots.
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li2018arabianstructure-activity
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|---|---|
| Authors | ;Ke Li;Hang Fan;Peipei Yin;Lingguang Yang;Qiang Xue;Xiang Li;Liwei Sun;Yujun Liu |
| Journal | Behavioural brain research |
| Year | 2018 |
| DOI |
10.1016/j.arabjc.2017.08.002
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