5HT3 receptors are the only ligand gated Cys-loop ‘cationotropic’ receptors.
5HT3 receptors are abundantly distributed in discrete brain regions.
5HT3 receptor antagonists have antidepressant activity.
5HT3 receptor antagonists can normalize altered neurotransmitter activity, HPA-axis hyperactivity, oxidative stress and neuroplasticity.
5HT3 receptors may be an alternative target in the management of depression.