Published online by Cambridge University Press: 07 November 2014
The endogenous peptide 5-HT–moduline has been characterized as a novel neuropeptide that binds to 5-HT1B receptors in the brain areas in which it is released. By inducing structural changes in these receptors, this peptide prevents 5-HT binding, thereby desensitizing the receptors and inhibiting serotonergic function. This novel mechanism may help to explain differential effects of the serotonergic system in varying areas of the brain that are innervated by the same or few neurons. In addition, dysfunction or disruption of the 5-HT–moduline system may contribute to psychiatric disorders such as depression and anxiety, and may have important implications for the development of new therapeutic agents for these disorders.