Details

Autor(en) / Beteiligte

• Bench, C J
• Lammertsma, A A
• Grasby, P M
• Dolan, R J
• Warrington, S J
• Boyce, M
• Gunn, K P
• Brannick, L Y
• Frackowiak, R S

Titel

The time course of binding to striatal dopamine D2 receptors by the neuroleptic ziprasidone (CP-88,059-01) determined by positron emission tomography

Ist Teil von

• Psychopharmacology, 1996-03, Vol.124 (1-2), p.141-147

Ort / Verlag

Germany

Erscheinungsjahr

1996

Quelle

MEDLINE

Beschreibungen/Notizen

• Positron emission tomography (PET) and 11C-raclopride were used to assess the time course of binding to central dopamine D2 receptors by the novel neuroleptic ziprasidone. In a third party blind study, six healthy male control subjects received a predose of 40 mg ziprasidone and were scanned at an interval of between 4 and 36 h post-dose. One additional subject was assigned to placebo predose and was scanned at 4 h post-dose. Binding potential (BP) was compared with that seen in the subject predosed with placebo and with that seen in nine unmedicated normal volunteers. Subjects studied up to 12 h post-dose had BPs that were greater than 2 SD less than the mean BP, indicative of extensive D2 receptor binding by ziprasidone. With increasing time between dosing and PET scanning there was a curvilinear increase in BP, so that all studies performed at or after 18 h post-dose gave BPs in the normal range (mean +/- 2 SD). Elevated prolactin levels returned to within the normal range by 18 h post-dose. PET measures of binding potential correlated significantly with serum levels of ziprasidone at the time of scanning and less significantly with absolute prolactin levels at the same time.