BACKGROUND: Various data have shown the involvement of serotonin (5-HT) in autism. The presence of the 5-HT transporter in platelets, similar to the same structure located in presynaptic serotonergic neurons, has produced a series of studies aimed at assessing its functionality in this disorder, but the ensuing findings are quite controversial. For this reason, we investigated the 5-HT transporter by means of the specific binding of [3H]-Paroxetine ([3H]-Par), which is currently considered the first-choice ligand for labeling it, in platelets of 20 autistic children and adolescents, as compared with healthy control subjects. METHODS: Twenty children and adolescents of both sexes suffering from autism according to DSM IV criteria were included in the study and compared with a similar group of healthy control subjects. Platelet membranes and the binding of [3H]-Par were carried out according to standardized protocols. RESULTS: The results showed a significantly higher density of [3H]-Par binding sites in autistic children than in healthy control subjects. CONCLUSIONS: These findings support the presence of a serotonergic dysfunction in autism and would suggest that the 5-HT transporter may have a specific role in this disorder, also in the light of its recently proposed role in brain development.
BACKGROUND: Various data have shown the involvement of serotonin (5-HT) in autism. The presence of the 5-HT transporter in platelets, similar to the same structure located in presynaptic serotonergic neurons, has produced a series of studies aimed at assessing its functionality in this disorder, but the ensuing findings are quite controversial. For this reason, we investigated the 5-HT transporter by means of the specific binding of [3H]-Paroxetine ([3H]-Par), which is currently considered the first-choice ligand for labeling it, in platelets of 20 autisticchildren and adolescents, as compared with healthy control subjects. METHODS: Twenty children and adolescents of both sexes suffering from autism according to DSM IV criteria were included in the study and compared with a similar group of healthy control subjects. Platelet membranes and the binding of [3H]-Par were carried out according to standardized protocols. RESULTS: The results showed a significantly higher density of [3H]-Par binding sites in autisticchildren than in healthy control subjects. CONCLUSIONS: These findings support the presence of a serotonergic dysfunction in autism and would suggest that the 5-HT transporter may have a specific role in this disorder, also in the light of its recently proposed role in brain development.
Authors: Jeremy Veenstra-Vanderweele; Tammy N Jessen; Brent J Thompson; Michelle Carter; Harish C Prasad; Jennifer A Steiner; James S Sutcliffe; Randy D Blakely Journal: J Neurodev Disord Date: 2009-06 Impact factor: 4.025
Authors: M Febin Farook; Michael DeCuypere; Keith Hyland; Toru Takumi; Mark S LeDoux; Lawrence T Reiter Journal: PLoS One Date: 2012-08-16 Impact factor: 3.240