2018
DOI: 10.1038/s41380-018-0114-5
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A dopaminergic mechanism of antipsychotic drug efficacy, failure, and failure reversal: the role of the dopamine transporter

Abstract: Antipsychotic drugs are effective interventions in schizophrenia. However, the efficacy of these agents often decreases over time, which leads to treatment failure and symptom recurrence. We report that antipsychotic efficacy in rat models declines in concert with extracellular striatal dopamine levels rather than insufficient dopamine D2 receptor occupancy. Antipsychotic efficacy was associated with a suppression of dopamine transporter activity, which was reversed during failure. Antipsychotic failure coinci… Show more

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Cited by 60 publications
(101 citation statements)
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“…2C-D). While we recapitulated previous reports on partial receptor occupancy 14,34 and dopamine uptake blockade 14 The decrease in Ca 2+ conductance may derive not only from decreased D2-IPSCs 37 , but also from alterations in pre-and post-synaptic excitatory transmission. NAcc glutamatergic terminals express D2r 38 and HAL functionally competes with endogenous dopamine for binding 39 .…”
Section: Msn Firing Rate Is Not Constant But Alternates Between Perisupporting
confidence: 88%
See 1 more Smart Citation
“…2C-D). While we recapitulated previous reports on partial receptor occupancy 14,34 and dopamine uptake blockade 14 The decrease in Ca 2+ conductance may derive not only from decreased D2-IPSCs 37 , but also from alterations in pre-and post-synaptic excitatory transmission. NAcc glutamatergic terminals express D2r 38 and HAL functionally competes with endogenous dopamine for binding 39 .…”
Section: Msn Firing Rate Is Not Constant But Alternates Between Perisupporting
confidence: 88%
“…16-95%) [6][7][8][9][10] suggest that this mechanism is poorly predictive of antipsychotic response. Assessment of APD function at a circuit level has proven more predictive of behavioral efficacy in humans [11][12][13] and rodents 14 . In human patients, the effects of APDs on striatal circuitry are assessed from fMRI BOLD signal, which is inhibited by APDs 11,12 .…”
mentioning
confidence: 99%
“…In a condition like PD where patients suffer from chronic motor impairments, typically slowness of movement, it is paramount to assess the long-term symptom relief in an animal model of Parkinsonism. In line with this, sub-chronic haloperidol treatment significantly reduces locomotor activity, resembling a bradykinesia state in rats (Amato et al 2011(Amato et al , 2018. The present study addressed the question whether 50-kHz USV playback ameliorates psychomotor deficits induced by haloperidol in a sub-chronic dosing regimen implemented by drug administration via osmotic mini-pumps.…”
Section: Introductionmentioning
confidence: 54%
“…For instance, in the caudate-putamen, d-amphetamine-but not cocaine-depletes dopamine-containing vesicles and enhances tonic dopamine release [75]. The effects of antipsychotic treatment on these processes are not yet known, but antipsychotic-treated rats have potentially enhanced striatal DAT function [11].…”
Section: Dopamine Reuptakementioning
confidence: 99%
“…Antipsychotic-induced dopamine supersensitivity is linked to antipsychotic treatment failure and to an exacerbation of psychosis symptoms [1][2][3][4][5][6][7]. In animals, a widely-used index of antipsychotic-induced dopamine supersensitivity is an exaggerated locomotor response to d-amphetamine [8][9][10][11][12][13][14][15][16][17][18]. In this context, d-amphetamine serves as a pharmacological tool to probe the functional consequences of an acute increase in striatal dopamine release, as seen during psychosis [19].…”
Section: Introductionmentioning
confidence: 99%