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Characterization of Compounds Acting on the α1A Adrenergic Receptor from Caulis spatholobi by Cell Membrane Chromatography with Possible Application for Treatment of Benign Prostatic Hyperplasia
Abstract:Tamsulosin hydrochloride is a commonly used drug for treatment of benign prostatic hyperplasia which is a disease affecting elderly men. However, adverse reactions may occur when tamsulosin hydrochloride is used for long-term treatment. Caulis spatholobi is a traditional Chinese medicine with many pharmacological effects. In this study, a cell membrane chromatography column was combined with high-performance liquid chromatography–mass spectrometry to determine the active compounds acting on α1A adrenergic receptor from Caulis spatholobi. Formononetin was shown to be active on the α1A adrenergic receptor. This was investigated by a competitive binding assay that demonstrated that tamsulosin hydrochloride and formononetin employ the same binding sites. Thus, formononetin is a potential α1A adrenergic receptor antagonist for treating benign prostatic hyperplasia.
Keywords:α1A adrenergic receptor  Caulis spatholobi  Cell membrane chromatography  Formononetin  High-performance liquid chromatography–mass spectrometry
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