کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9429054 1615204 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A yellow fluorescent protein-based assay for high-throughput screening of glycine and GABAA receptor chloride channels
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
A yellow fluorescent protein-based assay for high-throughput screening of glycine and GABAA receptor chloride channels
چکیده انگلیسی
There is a significant clinical need to identify novel ligands with high selectivity and potency for GABAA, GABAC and glycine receptor Cl− channels. Two recently developed, yellow fluorescent protein variants (YFP-I152L and YFP-V163S) are highly sensitive to quench by small anions and are thus suited to reporting anionic influx into cells. The aim of this study was to establish the optimal conditions for using these constructs for high-throughput screening of GABAA, GABAC and glycine receptors transiently expressed in HEK293 cells. We found that a 70% fluorescence reduction was achieved by quenching YFP-I152L with a 10 s influx of I− ions, driven by an external I− concentration of at least 50 mM. The fluorescence quench was rapid, with a mean time constant of 3 s. These responses were similar for all anion receptor types studied. We also show the assay is sufficiently sensitive to measure agonist and antagonist concentration-responses using either imaging- or photomultiplier-based detection systems. The robustness, sensitivity and low cost of this assay render it suited for high-throughput screening of transiently expressed anionic ligand-gated channels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 380, Issue 3, 3 June 2005, Pages 340-345
نویسندگان
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