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- W2081554906 abstract "Resveratrol, which is found in grapes, red wine, and berries, has many beneficial health effects, such as anti-cancer, neuro-protective, anti-inflammatory, and life-prolonging effects. However, the cellular mechanisms by which resveratrol acts are relatively unknown, especially in terms of possible regulation of receptors involved in synaptic transmission. 5-Hydroxytryptamine type 3A (5-HT3A) receptor is one of several ligand-gated ion channels involved in fast synaptic transmission. In the present study, we investigated the effect of resveratrol on mouse 5-HT3A receptor channel activity. 5-HT3A receptor was expressed in Xenopus oocytes, and the current was measured using a two-electrode voltage clamp technique. Treatment of resveratrol itself had no effect on the oocytes injected with H2O as well as on the oocytes injected with 5-HT3A receptor cRNA. In the oocytes injected with 5-HT3A receptor cRNA, co- or pre-treatment of resveratrol with 5-HT potentiated 5-HT-induced inward peak current (I5-HT) with concentration-, reversible, and voltage-independent manners. The EC50 of resveratrol was 28.0±2.4 μM. The presence of resveratrol caused a leftward shift of 5-HT concentration–response curve. Protein kinase C (PKC) activator or inhibitor had no effect on resveratrol action on I5-HT. Site-directed mutations of pre-transmembrane domain 1 (pre-TM1) such as R222A, R222D, R222E, R222K, and R222T abolished or attenuated resveratrol-induced enhancement of I5-HT, indicating that resveratrol might interact with pre-TM1 of 5-HT3A receptor. These results indicate that resveratrol might regulate 5-HT3A receptor channel activity via interaction with the N-terminal domain and these results further show that resveratrol-mediated regulation of 5-HT3A receptor channel activity might be one of cellular mechanisms of resveratrol action." @default.
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- W2081554906 date "2011-01-01" @default.
- W2081554906 modified "2023-10-16" @default.
- W2081554906 title "Resveratrol Enhances 5-Hydroxytryptamine Type 3A Receptor-Mediated Ion Currents: The Role of Arginine 222 Residue in Pre-transmembrane Domain I" @default.
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- W2081554906 doi "https://doi.org/10.1248/bpb.34.523" @default.
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