期刊
PLANTA MEDICA
卷 74, 期 5, 页码 521-526出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2008-1074491
关键词
GABA(A) receptor ligand; microelectrode voltage-clamp assay; Xenopus oocytes; HPLC actvity profiling; dereplication; lead discovery
资金
- Austrian Science Fund FWF [P 15914] Funding Source: Medline
An approach for rapid HPLC-based profiling for new GABA(A) ligands of natural origin has been developed. Active extracts are separated by a single injection of 3-10 mg of extract onto a semi-preparative (150 X 10 mm i.d.) HPLC column with gradient elution and time-based fractionation. The microfractions are tested in an automated two-microelectrode voltage-clamp assay on Xenopus oocytes expressing recombinant GABA(A) channels composed of alpha(1), beta(2) and gamma(2S) subunits. The protocol has been validated by spiking experiments with inactive extract and the GABA(A) receptor ligand magnolol, and by profiling of active extracts such as valerian extract containing the known GABA(A) receptor ligand valerenic acid. For dereplication of GABA containing extracts, we established a rapid and simple procedure by which GABA is analyzed as OPA derivative by reversed-phase HPLC. This dereplication protocol was validated with plant and fungal extracts which had been previously tested active or inactive in the oocyte assay and with spiking experiments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据