Developmental Effects of Serotonin Modulation

Serotonin (5-hydroxytryptamine, 5-HT) is a key neuromodulator that shapes brain architecture and behavioural outcomes from embryogenesis through adolescence. Fluctuations in serotonergic signalling during critical periods of prenatal and early postnatal life influence processes such as neuronal proliferation, migration, synaptogenesis and circuit refinement. Both excess and deficiency of serotonin can perturb thalamocortical connectivity, hippocampal plasticity and limbic‐prefrontal networks, leading to enduring alterations in emotionality, cognition and stress responsivity. Pharmacological interventions—most notably selective serotonin reuptake inhibitors (SSRIs)—are prescribed during pregnancy and early life, raising questions about their long‐term impact on offspring neurodevelopment. Current research integrates animal models, cell‐based assays and human cohort studies to disentangle the relative contributions of maternal depression, SSRI exposure and genetic susceptibility. Advances in transcriptomic profiling and three‐dimensional human stem cell models have provided mechanistic insights into how serotonin transporter function and receptor signalling influence gene expression programmes during neural differentiation. These findings carry global significance for public health guidelines on antidepressant use in perinatal care and for devising targeted interventions to mitigate neurodevelopmental risk. Ongoing efforts aim to identify biomarkers of serotonergic dysregulation, delineate critical windows of vulnerability and develop precision‐medicine strategies that balance maternal wellbeing with optimal neurodevelopmental trajectories.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Developmental Effects of Serotonin Modulation publication trend

The graph below shows the total number of articles in developmental effects of serotonin modulation across all publications each year (not limited to Nature Index journals).

Technical terms

Serotonin (5-HT): A monoamine neurotransmitter that modulates neural proliferation, migration and synaptic plasticity during development.

Selective serotonin reuptake inhibitor (SSRI): A class of antidepressant drugs that block the serotonin transporter to increase extracellular 5-HT levels.

Serotonin transporter (SERT): A presynaptic protein responsible for reuptake of serotonin from the synaptic cleft into neurons.

Neurogenesis: The generation of new neurons from neural progenitor or stem cells, particularly active during early brain development.

Neurite outgrowth: The extension of axons and dendrites from neuronal cell bodies, essential for establishing neural networks.

Anhedonia: A reduced ability to experience pleasure, often assessed in animal models as a marker of depressive-like behaviour.

References

1. Perinatal serotonergic manipulation shapes anhedonic and cognitive behaviors in a sex- and age-dependent manner: Identification of related biological functions at central and peripheral level. Brain Behavior and Immunity (2023).
2. Assessing the Neurodevelopmental Impact of Fluoxetine, Citalopram, and Paroxetine on Neural Stem Cell-Derived Neurons. Pharmaceuticals (2024).
3. Transcriptional changes in specific subsets of Drosophila neurons following inhibition of the serotonin transporter. Translational Psychiatry (2023).