Abstract
Contralateral turning can be evoked in rats with unilateral lesion of the nigro-striatal dopaminergic projection by the administra, tion of drugs which stimulate DA transmission. Two types of DA-receptors are currently distinguished (Garau et al., 1978; Kebabian and Calne, 1979); the D-1 type, stimulated preferentially by SKF 38393 and blocked by SCH 23390 and the D-2 type, stimulated, among other drugs, by LY 171555 and specifically blocked by various substituted benzamides. In unilaterally 6-hydroxydopamine (6-OHDA)-denervated rats, supersensitivity appears to develop specifically for each DA-receptor type both biochemically and behaviourally (Creese et al., 1977; Arnt and Hyttel, 1985). We have recently found that previous stimulation of D-2 receptors exerts a ‘priming’ effect on the ability of D-1 receptor stimulation to induce contraversive turning in the unilaterally DA-denervated rat (Morelli et al., 1987), indicating that the behavioural expression of D-1 receptor supersensitivity depends on previous stimulation of D-2 receptors. We now present evidence that the D-1 and D-2 receptor stimulation influence the expression of D-1 and D-2 dependent behavioural supersensitivity.
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References
Arnt, J. & J. Hyttel, 1984, Europ. J. Pharmacol. 102, 349.
Barone, P., T.A. Davis, A.R. Braun & T.N. Chase, 1986, Europ.J.Pharm. 123, 109.
Creese, I., D.R. Burt & S.H. Snyder, 1977, Science 197, 596.
Garau, L., S. Govoni, E. Stefanini, M. Trabucchi & P.F. Spano, 1978, Life Sci. 23, 1745.
Kebabian, J.W. & D.B. Calne, 1979, Nature 277, 93.
Longoni, R., L. Spina & G.Di Chiara, 1987, Europ.J.Pharmacol. 134, 163.
Morelli, M., S. Fenu & G.Di Chiara, 1987., Life Sci. 40, 245.
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© 1988 M. Morelli, S. Fenu, G. Pomata and G. Di Chiara
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Morelli, M., Fenu, S., Pomata, G., Di Chiara, G. (1988). ‘Priming’ Phenomena in the Expression of D1 and D2 Receptor Supersensitivity. In: Beart, P.M., Woodruff, G.N., Jackson, D.M. (eds) Pharmacology and Functional Regulation of Dopaminergic Neurons. Satellite Symposia of the IUPHAR 10th International Congress of Pharmacology. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-10047-7_22
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DOI: https://doi.org/10.1007/978-1-349-10047-7_22
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