Goethals Ingeborg, Vervaet Myriam, Audenaert Kurt, Jacobs Filip, Ham Hamphrey, Van de Wiele Christophe, Vandecapelle Marleen, Slegers Guido, Dierckx Rudi, van Heeringen Cees
Division of Nuclear Medicine, Ghent University Hospital, De Pintelaan, 185, B-9000 Ghent, Belgium. ingeborg@
J Psychiatr Res. 2007 Aug;41(5):455-8. doi: 10.1016/j.jpsychires.2005.04.002. Epub 2005 May 31.
Using single photon emission computed tomography and the 5-HT2A receptor antagonist, 123I-5-I-R91150, we explored differences in 5-HT2A binding index in anorexia nervosa patients with and without bulimic features. We also searched for associations between temperament dimensions and cortical 5-HT2) binding.
About 9 restrictive and 7 bulimic anorexia nervosa patients were examined and cortical 123I-5-I-R91150 binding index values were compared between the two subgroups. Open explorative correlation analysis was used to examine any relationships between binding index values and temperament scores, as assessed with the Temperament and Character Inventory.
5-HT2A binding index was significantly reduced in the parietal cortex in bulimic anorexia nervosa patients in comparison with restrictive anorectics. Further, a positive correlation was documented between reward dependence and parietal 5-HT2A binding index across patients in the two subgroups.
Restrictive anorexia nervosa patients differ from binging/purging anorexia nervosa patients on the basis of a reduced parietal 5-HT2A binding index in the latter. We speculate that the finding of a positive correlation between parietal 5-HT2A binding and reward dependence might reflect an association between these two variables, at least in anorexia nervosa patients.
