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Planta Med. 2000 Feb;66(1):91-3.

Interaction of flavones from the roots of Scutellaria baicalensis with the benzodiazepine site.


A radioreceptor binding assay was used to guide the isolation of four chemical constituents in the organic solvent extracts of Scutellaria baicalensis Georgi capable of binding to the benzodiazepine site (BZD-S) of the GABAA receptor: wogonin (Ki = 2.03 +/- 0.24 microM), baicalin (Ki = 77.10 +/- 4.79 microM), baicalein (Ki = 5.69 +/- 0.95 microM), and scutellarein (Ki = 12.00 +/- 1.27 microM). All four compounds contain the flavonoid phenylbenzopyrone nucleus. Based on BZD-S binding, the order of affinity among these four compounds was wogonin > baicalein > scutellarein > baicalin.

[Indexed for MEDLINE]

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