ReviewMolecular psychiatry2002
Thyroid hormones, serotonin and mood: of synergy and significance in the adult brain.
Review in Molecular psychiatry, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 126 papers, 10 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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
126 citing papers in PubMed, 10 syntheses or guidelines pooled it, 352 citations in OpenAlex.
- Could thyrotropin serum level characterize major depressive disorder phenotype? A systematic review and meta-analysis.Journal of endocrinological investigation · 2026Pooled it
- Risk of cardiac, neuropsychiatric and musculoskeletal adverse events with levothyroxine: Systematic review.British journal of clinical pharmacology · 2026Pooled it
- Pooled it
- Thyrotropin levels in first-episode bipolar disorder and their association with clinical phenotypes: systematic review and meta-analysis.Frontiers in endocrinology · 2025Pooled it
- Association between thyroid hormone levels in the acute stage of stroke and risk of poststroke depression: A meta-analysis.Brain and behavior · 2024Pooled it
- Hyperthyroidism and clinical depression: a systematic review and meta-analysis.Translational psychiatry · 2022Pooled it
- Subclinical Hypothyroidism and Depression: A Systematic Review and Meta-Analysis.Frontiers in endocrinology · 2019Pooled it
- Subclinical hypothyroidism and depression: a meta-analysis.Translational psychiatry · 2018Pooled it
- Association of Depression and Anxiety Disorders With Autoimmune Thyroiditis: A Systematic Review and Meta-analysis.JAMA psychiatry · 2018Pooled it
- Hypericum perforatum as a cognitive enhancer in rodents: A meta-analysis.Scientific reports · 2016Pooled it
- Levothyroxine effects on depressive symptoms and limbic glucose metabolism in bipolar disorder: a randomized, placebo-controlled positron emission tomography study.Molecular psychiatry · 2016Trial
- Neural correlates of free T3 alteration after catecholamine depletion in subjects with remitted major depressive disorder and in controls.Psychopharmacology · 2014Trial
- Supraphysiological doses of levothyroxine alter regional cerebral metabolism and improve mood in bipolar depression.Molecular psychiatry · 2005Trial
- Review
- Cardiometabolic Risk Factors in Women Exposed to High Altitude.International journal of molecular sciences · 2026Review
- Thyroid dysfunction and Research Domain Criteria framework-based depression phenotypes: Insights from a historical longitudinal cohort.Journal of affective disorders · 2026Article
- Right-lateralized maladaptive topological reorganization in hyperthyroidism.Journal of neuroendocrinology · 2026Article
- Alternative and Complementary Therapies: A Review Exploring the Role of Yoga and Ayurveda-based Herbal Medicines in Alleviating Hypothyroidism and Its Neuropsychiatric Manifestations.Annals of neurosciences · 2026Review
- Impact of Levothyroxine Treatment for Hypothyroidism on the Risk of Psychiatric Interventions in Children and Adolescents with Anxiety Disorders: A Retrospective Analysis of Data from the TriNetX Platform.Journal of clinical medicine · 2026Article
- Acute psychosis with convulsive episodes following total thyroidectomy induced by concurrent hypothyroidism and hypocalcemia: a case report.Journal of medical case reports · 2026Article
66 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The use of thyroid hormones as an effective adjunct treatment for affective disorders has been studied over the past three decades and has been confirmed repeatedly. Interaction of the thyroid and monoamine neurotransmitter systems has been suggested as a potential underlying mechanism of action. While catecholamine and thyroid interrelationships have been reviewed in detail, the serotonin system has been relatively neglected. Thus, the goal of this article is to review the literature on the relationships between thyroid hormones and the brain serotonin (5-HT) system, limited to studies in adult humans and adult animals. In humans, neuroendocrine challenge studies in hypothyroid patients have shown a reduced 5-HT responsiveness that is reversible with thyroid replacement therapy. In adult animals with experimentally-induced hypothyroid states, increased 5-HT turnover in the brainstem is consistently reported while decreased cortical 5-HT concentrations and 5-HT2A receptor density are less frequently observed. In the majority of studies, the effects of thyroid hormone administration in animals with experimentally-induced hypothyroid states include an increase in cortical 5-HT concentrations and a desensitization of autoinhibitory 5-HT1A receptors in the raphe area, resulting in disinhibition of cortical and hippocampal 5-HT release. Furthermore, there is some indication that thyroid hormones may increase cortical 5-HT2 receptor sensitivity. In conclusion, there is robust evidence, particularly from animal studies, that the thyroid economy has a modulating impact on the brain serotonin system. Thus it is postulated that one mechanism, among others, through which exogenous thyroid hormones may exert their modulatory effects in affective illness is via an increase in serotonergic neurotransmission, specifically by reducing the sensitivity of 5-HT1A autoreceptors in the raphe area, and by increasing 5-HT2 receptor sensitivity.
Indexed as
Identifiers
What OpenQuestion holds
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.