Purinergic Signalling Receptor cross-talk: haloperidol treatment enhances A2A adenosine receptor functioning in a transfected cell model M. Letizia Trincavelli 1#, S. Cuboni1#, M. Catena Dell’Osso 1, R. Maggio 2, K-N. Klotz 3, F. Novi 4, A. Panighini 1, S. Daniele 1, C. Martini1* 1Department of Psychiatry, Neurobiology, Pharmacology and Biotechnology. University of Pisa. 56126 Pisa, Italy. 2 Department of Experimental Medicine, University of L'Aquila. L'Aquila, Italy. 3Institut für Pharmakologie und Toxikologie, Universität Würzburg, Würzburg, Germany. 4Department of Neuroscience. University of Pisa. Pisa. Italy. *Corresponding author: Prof. Claudia Martini. Dept of Psychiatry, Neurobiology, Pharmacology and Biotechnology. University of Pisa. Via Bonanno, 6, 56127 Pisa. E-mail: [email protected]. Phone Number: +39.0502219522; FAX number: +39.0502219609. A Fig. 1 B/F 20000 10000 0 0 500 1000 1500 fmol/mg B 400 B/F 300 200 100 0 0 1000 2000 3000 4000 5000 6000 7000 fmol/mg Fig. 1 Scatchard Plot of (A) [3H]YM09151-2 (D2DRs) and (B) [3H]NECA (A2AARs) binding data performed in CHO cells co-expressing both D2DRs and A2AARs. Graphs show a representative Scatchard Plot from saturation (A) and competition (B) binding studies performed three times with similar results.