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- W1966205945 abstract "We investigated the effects of R(-)-1-(benzo[b]thiophen-5-yl)-2-[2-(N,N-diethylamino)ethoxy]ethan ol hydrochloride (T-588), a novel cognitive enhancer, on trimeric GTP-binding proteins (G proteins) and cyclic AMP accumulation in rat cerebral cortex. T-588 (0.1-1.0 mM) inhibited the ADP-ribosylation of alpha subunit of Gs in a concentration-dependent manner. Auto-ADP-ribosylation of CTX was not inhibited by T-588. The stimulatory effect of guanosine 5'-(3-O-thio)triphosphate (GTPgammaS) on CTX-catalyzed ADP-ribosylation was attenuated by adding T-588 in assay mixture. ADP-ribosylation of Gi/Go by pertussis toxin was slightly inhibited by T-588. Isoproterenol-stimulated cyclic AMP accumulation was inhibited by adding 3 mM T-588 to rat cerebral cortical slices. Next, we investigated the effects of isoproterenol and T-588 on GTPgammaS binding. Membranes were first incubated with or without isoproterenol and T-588 in the presence of 0.2mM GTPgammaS, then cholate extract preparations were prepared from the washed membranes. Interestingly, the [32P]ADP-ribosylation of G(s alpha) was enhanced not only by isoproterenol but also by T-588. Although the obtained results are apparently inconsistent, T-588 seems to interact with G proteins, specifically Gs." @default.
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- W1966205945 date "1999-03-01" @default.
- W1966205945 modified "2023-09-25" @default.
- W1966205945 title "Effects of T-588, a novel cognitive enhancer, on ADP-ribosylation of Gsα by cholera toxin and cyclic AMP accumulation in rat cerebral cortex" @default.
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- W1966205945 doi "https://doi.org/10.1016/s0197-0186(98)00082-5" @default.
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