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Benedetti, F. et al.

Influence of a functional polymorphism within the promoter of the serotonin transporter gene on the effects of total sleep deprivation in bipolar depression.

OBJECTIVE: A functional polymorphism in the transcriptional control region upstream of the coding sequence of the 5-hydroxytryptamine transporter (5-HTT) has been reported. This polymorphism has been shown to influence the antidepressant response to fluvoxamine and paroxetine. The authors tested the hypothesis that the allelic variation of the 5-HTT-linked polymorphic region (5-HTTLPR) could influence the response of depressed patients to total sleep deprivation. METHOD: Sixty-eight drug-free inpatients with bipolar depression underwent a night of total sleep deprivation. 5-HTTLPR was genotyped in these patients. Changes in perceived mood were rated on a visual analogue scale and analyzed by using repeated measures analysis of covariance. RESULTS: Patients who were homozygotic for the long variant of 5-HTTLPR showed a significantly better mood amelioration after total sleep deprivation than those who were heterozygotic and homozygotic for the short variant. CONCLUSIONS: The influence of 5-HTTLPR on response to total sleep deprivation is similar to its observed influence on response to serotonergic drug treatments. This finding supports the hypothesis of a major role for serotonin in the mechanism of action of total sleep deprivation in depression.[1]

References

Influence of a functional polymorphism within the promoter of the serotonin transporter gene on the effects of total sleep deprivation in bipolar depression. Benedetti, F., Serretti, A., Colombo, C., Campori, E., Barbini, B., di Bella, D., Smeraldi, E. The American journal of psychiatry. (1999) [Pubmed]

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