Dopamine D1 Receptors in Cocaine Dependence Measured with PET and the Choice to Self-administer Cocaine
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The goal of this study was to determine D(1) receptor availability in human cocaine-dependent (CD) subjects and matched healthy controls (HCs). In addition, the CD subjects performed cocaine self-administration sessions in order to explore the association between D(1) receptor availability and cocaine-seeking behavior. Twenty-five CD subjects (40+/-4 years, 19M/6 F) and 23 matched HCs (38+/-4 years, 19M/4F) were scanned with PET and the radiotracer [(11)C]NNC 112. During the cocaine self-administration sessions, CD volunteers were given the choice to self-administer cocaine (0, 6, and 12 mg) or to receive a monetary voucher worth $5. D(1) receptor availability was measured in the limbic, associative, and sensori-motor striatum in addition to cortical brain regions. No difference in D(1) receptor availability was seen between the two groups. A negative association was seen between D(1) receptor BP(ND) in the limbic striatum and the choice for the 6 mg dose of cocaine (r=-0.47, p=0.02, corrected for age). These results do not support the hypothesis that cocaine dependence is associated with a reduction in D(1) receptor availability in the striatum. However, within the CD subjects, low D(1) receptor availability in the ventral striatum was associated with the choice to self-administer cocaine, suggesting that low D(1) receptor availability may be associated with an increased risk of relapse in cocaine dependence.
Estave P, Albertson S, Karkhanis A, Jones S Sci Rep. 2024; 14(1):6509.
PMID: 38499566 PMC: 10948819. DOI: 10.1038/s41598-024-53463-9.
Hersey M, Bartole M, Jones C, Newman A, Tanda G Molecules. 2023; 28(13).
PMID: 37446929 PMC: 10343811. DOI: 10.3390/molecules28135270.
Ceceli A, Parvaz M, King S, Schafer M, Malaker P, Sharma A Cereb Cortex. 2022; 33(3):597-611.
PMID: 35244138 PMC: 9890460. DOI: 10.1093/cercor/bhac087.
Kohno M, Dennis L, McCready H, Hoffman W Mol Psychiatry. 2021; 27(1):220-229.
PMID: 34117366 PMC: 8664889. DOI: 10.1038/s41380-021-01180-4.
Lynch W, Bakhti-Suroosh A, Abel J, Davis C Psychopharmacology (Berl). 2020; 238(3):811-823.
PMID: 33241478 PMC: 8290931. DOI: 10.1007/s00213-020-05732-4.