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- W2033642891 startingPage "2024" @default.
- W2033642891 abstract "The 5-HT6 receptor (5-HT6R) is a member of the class of recently discovered 5-hydroxytryptamine (5-HT) receptors. Due to the lack of selective 5-HT6R ligands, the cellular signaling mechanisms of the 5-HT6R are poorly understood. We previously developed a cell-based high-throughput screening (HTS) method for the 5-HT6R and screened synthetic chemical compounds. In the present study, we expanded our screening into natural products to find novel 5-HT6R ligands. We found that the ethyl acetate fraction from the root of Caragana sinica (537-18BE) produced the most potent antagonistic activity. After further isolation of 537-18BE, we found that three stilbene derivatives, (+)-α-viniferin, miyabenol C and pallidol, are active constituents of 537-18BE inhibiting the 5-HT6R. Among them, (+)-α-viniferin showed the most potent inhibition, and miyabenol C also produced a considerable inhibition. When examined effects on other neurotransmitters for selectivity, 537-18BE and three stilbene derivatives did not produce any notable effects on 5-HT4, 5-HT7, or muscarinic acetylcholine M1 (M1) receptors. Furthermore, 5-HT6R antagonistic effects of (+)-α-viniferin, miyabenol C and pallidol were confirmed on extracellular signal-regulated kinase 1 and 2 (ERK1/2) which exerts effects in downstream pathways of 5-HT6R activation." @default.
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- W2033642891 date "2010-01-01" @default.
- W2033642891 modified "2023-09-27" @default.
- W2033642891 title "Stilbene Derivatives as Human 5-HT6 Receptor Antagonists from the Root of Caragana sinica" @default.
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- W2033642891 doi "https://doi.org/10.1248/bpb.33.2024" @default.
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