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Titolo:
CARBON-11-FLB-457 - A RADIOLIGAND FOR EXTRASTRIATAL D2 DOPAMINE-RECEPTORS
Autore:
HALLDIN C; FARDE L; HOGBERG T; MOHELL N; HALL H; SUHARA T; KARLSSON P; NAKASHIMA Y; SWAHN CG;
Indirizzi:
KAROLINSKA HOSP,DEPT CLIN NEUROSCI,PSYCHIAT SECT S-17176 STOCKHOLM SWEDEN KAROLINSKA INST,DEPT CLIN NEUROSCI,PSYCHIAT SECT STOCKHOLM SWEDEN ASTRO DRACO AB LUND SWEDEN ASTRA ARCUS AB SODERTALJE SWEDEN
Titolo Testata:
The Journal of nuclear medicine
fascicolo: 7, volume: 36, anno: 1995,
pagine: 1275 - 1281
SICI:
0161-5505(1995)36:7<1275:C-ARFE>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
POTENTIAL ANTIPSYCHOTIC AGENTS; LIVING HUMAN-BRAIN; ANTIDOPAMINERGIC PROPERTIES; PET; BINDING; LIGAND; C-11; VISUALIZATION; RACLOPRIDE; RAT;
Keywords:
BRAIN; D2 DOPAMINE RECEPTORS; EXTRASTRIATAL; CARBON-11-FLB 457; POSITRON EMISSION TOMOGRAPHY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
C. Halldin et al., "CARBON-11-FLB-457 - A RADIOLIGAND FOR EXTRASTRIATAL D2 DOPAMINE-RECEPTORS", The Journal of nuclear medicine, 36(7), 1995, pp. 1275-1281

Abstract

D2 dopamine receptors in extrastriatal brain regions are of central interest for research in schizophrenia and antipsychotic drugs. This article reports the development of [C-11]FLB 457 for PET examination of extrastriatal D2 dopamine receptors. Methods: Carbon-11-FLB 457 was prepared by O-methylation of FLB 604 (2-hydroxy precursor) with [C-11]methyl iodide. Total radiochemical yield was 25%-35% within a total synthesis time of 30 min. The specific radioactivity at the end of synthesis was about 1300 Ci/mmole (48 GBq/mu mole). Results: FLB 457 bound with high affinity to D2 and D3 dopamine receptors, whereas binding to other putative central receptors was negligible. PET studies in Cynomolgus monkeys demonstrated 15 times higher accumulation of radioactivityin the striatum than in the cerebellum after 60 min. Uptake in the thalamus and neocortex, extrastriatal regions with a low density of D2 dopamine receptors, was, respectively, 4 and 2.5 times higher than in the cerebellum. Radioactivity was displaced by raclopride and haloperidol which confirms the selectivity and reversibility of [C-11]FLB 457 binding to D2 dopamine receptors in vivo in the striatum, thalamus and neocortex. Conclusion: Carbon-11-FLB 457 should be a useful PET ligandfor quantitative examination of D2 dopamine receptors in extrastriatal regions in the human brain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:49:03