SynthesisEBioMedicine2025
Pro-dopaminergic pharmacological interventions for anhedonia in depression: a living systematic review and network meta-analysis of human and animal studies.
Synthesis in EBioMedicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 6 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed.
- Research agenda to advance anhedonia assessment, understanding and treatment: an ECNP-GALENOS expert meeting report.BMJ mental health · 2026Review
- The GALENOS approach to triangulating evidence: a structured approach for integrating information from human and animal studies.BMC medical research methodology · 2026Article
- Longitudinal trends and sociodemographic inequalities in comorbid insufficient physical activity and depressive symptoms among Chinese adolescents and young adults, 2016-2022.Scientific reports · 2026Article
- Automatically detecting trends and open questions from mental health publications: a Wellcome-funded GALENOS project.BMJ mental health · 2026Article
- Untargeted Urinary Metabolomic Profiling Reveals Metabolic Signatures Associated with Anhedonia Severity-Stratified Subgroups in Major Depressive Disorder.Neuropsychiatric disease and treatment · 2026Article
- A Paradigm Shift in Progress: Generative AI's Evolving Role in Mental Health Care.JMIR mental health · 2025Article
Corrections and comments
- Erratum issued
Authors and funding
19 authors.
Funding
Abstract
backgroundIt is unclear whether pro-dopaminergic drugs reduce anhedonia in major depressive disorder (MDD) and further, if so, to what extent this is the case.
methodsWith lived experienced experts we co-produced two living systematic reviews of randomised controlled trials (RCTs) investigating the relative efficacy of pro-dopaminergic interventions in reducing symptoms of anhedonia in people with MDD (versus placebo) and in relevant non-human animal models (versus vehicle control/no intervention). Multiple electronic databases were searched until June 9, 2024. The primary outcomes were subjective anhedonia symptoms in humans and sucrose preference test (a measure of reward sensitivity and proxy for anhedonia) in animals. We evaluated other important domains and clinical aspects closely related to anhedonia, such as reward/reinforcement tasks, anxiety symptoms, acceptability, tolerability, and adverse events. We performed pairwise meta-analyses separately for human and non-human studies. We also estimated the relative effects of pro-dopaminergic versus non-dopaminergic antidepressants in human studies on anhedonia and overall depressive symptoms using a series of random-effects network meta-analyses of both aggregate and patient-level data. A multidisciplinary panel of international experts (including people with lived experience) then interpreted the overall results and produced a list of recommendations via a triangulation process. This study is part of GALENOS (Global Alliance for Living Evidence in aNxiety, depressiOn, and pSychosis). PROSPERO registration: CRD42023451821.
findingsPro-dopaminergic interventions were associated with a small reduction of anhedonia symptoms (6 RCTs, n = 2076; SMD -0.24, 95% CI -0.46 to -0.03) in people with MDD and increased sucrose preference in animal models (27 RCTs; SMD 1.34, 0.88 to 1.79). We did not find data about reward/reinforcement tasks in humans. Evidence was rated as low to moderate. In the network meta-analysis, some antidepressants with a non-dopaminergic mechanism of action showed reduction in anhedonia symptoms, which was larger than pro-dopaminergic drugs and probably independent of overall depression improvement.
interpretationOur findings provide some support for the role of dopamine in anhedonia. However, the precise neurobiological mechanisms of anhedonia in major depression are still poorly understood and we posit that they may be possibly related to altogether different or more general effects of antidepressants on these symptoms. Therefore, data on reward, including reward-related learning and memory, are needed to properly examine the relationship between dopamine modulation and anhedonia.
fundingWellcome (GALENOS project).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.