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23. Die Neuroglia: Historischer Überblick

Author

Niessing, Von K., Scharrer, E., Scharrer, B., Oksche, A., Oksche, A., editor, Vollrath, L., editor, Leonhardt, H., editor, Niessing, K., editor, Scharrer, E., editor, Scharrer, B., editor, Weitzman, M., editor, and Wittkowski, W., editor

Published
1980
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38. Einleitung

Author

Bachmann, R., Scharrer, E., Scharrer, B., Bachmann, R., editor, Scharrer, E., editor, and Scharrer, B., editor

Published
1954
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43. Dopamine [D.sub.2] receptors mediate amylin's acute satiety effect

Author

LUTZ, T. A., TSCHUDY, S., MOLLET, A., GEARY, N., and SCHARRER, E.

Subjects
Dopamine receptors -- Genetic aspects, Genetic research -- Analysis, Amphetamines -- Genetic aspects, Biological sciences
Abstract

The anorectic effect of the pancreatic peptide amylin has been established in numerous studies. Here, we investigated the influence of a pretreatment with dopamine (DA) [D.sub.1]- and [D.sub.2]-receptor antagonists on the anorectic effect of intraperitoneally injected amylin in rats fed a medium-fat (18% fat) diet. In 24-h food-deprived rats, pretreatment with the DA [D.sub.2]-receptor antagonist raclopride [100 [micro]g/kg (0.2 [micro]mol/kg) ip] significantly attenuated amylin's (5 [micro]g/kg ip) anorectic effect, whereas raclopride alone had no effect on food intake [i.e., food intakes 1 h after injection were (n = 12): NaCl/NaCl 7.3 [+ or -] 0.5 g; NaCl/amylin 3.9 [+ or -] 0.6; raclopride/NaCl 7.7 [+ or -] 0.7; raclopride/amylin 5.6 [+ or -] 0.7]. Pretreatment with another DA [D.sub.2] receptor antagonist, sulpiride [50 mg/kg (154 [micro]mol/kg) ip], similarly reduced amylin's satiety effect, whereas pretreatment with the DA [D.sub.1]-receptor antagonist SCH-23390 [10 [micro]g/kg (0.03 [micro]mol/kg) ip] did not influence amylin's effect. SCH-23390, however, completely blocked the anorexia induced by D-amphetamine (0.3 mg/kg ip). These results suggest that, under the present feeding conditions, the dopaminergic system mediates part of amylin's inhibitory effect on feeding in rats when administered intraperitoneally. This seems to involve DA [D.sub.2] receptors but not [D.sub.1] receptors. food intake; rat; amphetamine; raclopride; sulpiride; SCH-23390

Published
2001

44. Schluß

Author

Bachmann, R., Scharrer, E., Scharrer, B., Bachmann, R., editor, Scharrer, E., editor, and Scharrer, B., editor

Published
1954
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46. Summary

Author

Bargmann, W., Hanström, B., Scharrer, B., Scharrer, E., Bargmann, W., editor, Hanström, B., editor, Scharrer, B., editor, and Scharrer, E., editor

Published
1958
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