Positron emission tomography reveals elevated D2 dopamine receptors in drug-naive schizophrenics

Science ◽  
1986 ◽  
Vol 234 (4783) ◽  
pp. 1558-1563 ◽  
Author(s):  
D. Wong ◽  
H. Wagner ◽  
L. Tune ◽  
R. Dannals ◽  
G. Pearlson ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Dopamine Receptors ◽  
Emission Tomography ◽  
D2 Dopamine Receptors ◽  
Positron Emission ◽  
Drug Naïve

Sight and Insight: Regional Cerebral Metabolic Activity in Schizophrenia Visualised by Positron Emission Tomography, and Competing Neurodevelopmental Perspectives

1990 ◽  
Vol 156 (5) ◽  
pp. 615-619 ◽  
Author(s):  
John L. Waddington
Keyword(s):  
Positron Emission Tomography ◽  
Psychiatric Disorders ◽  
Dopamine Receptors ◽  
Metabolic Activity ◽  
New Technology ◽  
Emission Tomography ◽  
Brain Dopamine ◽  
The Past ◽  
Positron Emission ◽  
Schizophrenic Patients

Over the past several years there has emerged a family of highly sophisticated but technically complex procedures for the visualisation of a range of cerebral functions in living man (Andreasen, 1988). The images they produce are so beguiling not just because of their potential to give new insights into the pathophysiology and treatment of major psychiatric disorders, but because they convey information through a quite fundamental modality: people are only convinced by what they can see. However, initial applications of such new technology have appeared just as likely to generate new questions and contradictions as to provide answers to current issues. This is readily illustrated by recent studies on the imaging of brain dopamine receptors in schizophrenic patients by positron emission tomography (PET) (see Waddington, 1989a).

scholarly journals The Quantitative Analysis of D2-Dopamine Receptors in Baboon Striatum in vivo with 3-N-[2'-18F]Fluoroethylspiperone Using Positron Emission Tomography

1990 ◽  
Vol 10 (5) ◽  
pp. 720-726 ◽  
Author(s):  
S. Jovkar ◽  
K. Wienhard ◽  
G. Pawlik ◽  
H. H. Coenen
Keyword(s):  
Positron Emission Tomography ◽  
Kinetic Model ◽  
Dopamine Receptors ◽  
Specific Activity ◽  
Emission Tomography ◽  
Parameter Estimates ◽  
Model Parameters ◽  
Positron Emission ◽  
Model Configuration

We used the ligand 3- N-[2'-18F]fluoroethylspiperone (FESP), which binds to D2-dopamine receptors in the striatum, and positron emission tomography (PET) to quantify striatal D2-dopamine densities ( Bmax) and binding kinetics in baboon brain in vivo. Sequential PET scans were obtained for 4 h post injection. Various similar models based on a nonlinear kinetic four-compartment model that takes into account the effect of ligand specific activity were used. We investigated the effect of exact model configuration on the reliability of Bmax and other kinetic transfer coefficients. We found that with the ligand FESP and dynamic PET studies, the estimated values of Bmax and other model parameters are sensitive to the choice of model configuration, ligand specific activity, and data analysis technique. The limitations of the reliability of parameter estimates in a complex kinetic model for receptor ligands were studied in simulation calculations. Results showed that the accuracy of estimated values of Bmax is affected by both the ligand binding properties and the injected dose of ligand. The estimated average value of kinetic model parameters was as follows: ligand-receptor dissociation constant k4 = 0.0080 min−1; the product of ligand-receptor association constant and fraction of ligand available to bind to specific receptors f2 ka = 0.0052 (min n M)−1; and D2-dopamine receptor density Bmax = 37.5 pmol g−1.

In Vivo Measurement of Dopamine Receptors in Human Brain by Positron Emission Tomography Age and Sex Differences

1988 ◽  
Vol 515 (1 Central Deter) ◽  
pp. 203-214 ◽  
Author(s):  
DEAN F. WONG ◽  
EMMANUEL P. BROUSSOLLE ◽  
GARY WAND ◽  
VICTOR VILLEMAGNE ◽  
ROBERT F. DANNALS ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Sex Differences ◽  
Human Brain ◽  
Dopamine Receptors ◽  
Emission Tomography ◽  
In Vivo Measurement ◽  
Positron Emission ◽  
Age And Sex

Use of positron emission tomography to measure the effects of nalmefene on D 1 and D 2 dopamine receptors in rat brain

1997 ◽  
Vol 775 (1-2) ◽  
pp. 183-188 ◽  
Author(s):  
Ellen M Unterwald ◽  
Hideo Tsukada ◽  
Takeharu Kakiuchi ◽  
Tsuyoshi Kosugi ◽  
Shingo Nishiyama ◽  
...  
Keyword(s):  
Positron Emission Tomography ◽  
Rat Brain ◽  
Dopamine Receptors ◽  
Emission Tomography ◽  
Positron Emission
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