Takashi Horikawa

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In vivo effects of single and repeated interferon-alpha administrations on the dynamics of noradrenaline, dopamine and 5-hydroxytryptamine were investigated in the mouse brain. Single interferon-alpha administration (15, 30 and 60 X 10(6) U/kg i.p.) had no significant effect on the levels of monoamines and their metabolites or monoamine turnover. When(More)
We have investigated the response of adenylate cyclase to GTP and to dopamine (DA) in striatal membranes of rats treated for 3 weeks with chlorpromazine or haloperidol, and further measured the level of Gi (an inhibitory GTP-binding protein) or Go (a similar GTP-binding protein of unknown function) in 3 areas (cerebral cortex, striatum and hippocampus)(More)
A series of 3-substituted 1-azabicyclo[2.2.2]octanes was discovered as the alpha7 nicotinic acetylcholine (alpha7) receptor agonists. It was found that (+)-3-[2-(benzo[b]thiophen-2-yl)-2-oxoethyl]-1-azabicyclo[2.2.2]octane (+)-15b has potent agonistic activity for the alpha7 receptor.
Overactivation of poly (ADP-ribose) polymerase-1 (PARP-1) in response to DNA damage is considered to play a crucial role in the development of post-ischemic neuronal injury, such as ischemic stroke. The present study was undertaken to clarify the beneficial effects of MP-124, a novel PARP-1 inhibitor, on neurological deficits and cerebral infarcts following(More)
The response of adenylate cyclase to GTP and to dopamine (DA) was investigated in striatal membranes from desipramine (DMI)- or saline-treated rats. DMI (15 mg/kg) or saline was injected i.p. once a day for 3 weeks. In saline-treated control membranes, GTP exerted a biphasic effect on basal and DA-stimulated enzyme activity; peak levels of stimulation by DA(More)
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