Involvement of .BETA.-Adrenergic Systems in the Antagonizing Effect of Paeoniflorin on the Scopolamine-Induced Deficiti n Radial Maze Performance in Rats.
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- Ohta Hiroyuki
- Section of Pharmacology, Research Institute for Wakan Yaku, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
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- Matsumoto Kinzo
- Section of Pharmacology, Research Institute for Wakan Yaku, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
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- Watanabe Hiroshi
- Section of Pharmacology, Research Institute for Wakan Yaku, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
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- Shimizu Mineo
- Laboratory of Pharmacognosy, Department of Medical Resources, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
Bibliographic Information
- Other Title
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- Effects of N-Nitro-L-Arginine on Isolated Rabbit Afferent Arterioles
- Involvement of β-adrenagic systems in the antagonizing effect of paeoniflorin on the scopolamine-induced deficit in radial maze performance in rats
- Involvement of β-adrenergic systems in the antagonizing effect of paeoniflorin on the scopolamine-induced deficit in radial maze performance in rat
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Abstract
Paeoniflorin, a major constituent of peony root, has been demonstrated to attenuate the radial maze performance deficit produced by scopolamine. In the present study, to investigate the possible involvement of β-adrenergic systems in the paeoniflorin antagonism of the scopolamine deficit, the effects of two β-adrenoceptor antagonists, propranolol and atenolol, on the paeoniflorin effect were examined in male Wistar rats. Paeoniflorin (1 mg/kg, p.o.) significantly attenuated the scopolamine HBr (0.3 mg/kg, i.p.)-induced deficit in the choice accuracy in radial maze performance without changing the running time prolonged by scopolamine. Neither D, L-propranolol HCl, a lipophilic β-antagonist, at 3 mg/kg, i.p. nor atenolol, a hydrophilic β1-antagonist that is known to hardly ever cross the blood-brain barrier, at 1 mg/kg, i.p. impaired maze performance by itself or aggravated the scopolamine-induced deficit in radial maze performance. Both antagonists, however, completely blocked the antagonizing effect of paeoniflorin on the scopolamine deficit. These data suggest that the β-adrenergic systems, especially peripheral β1-adrenergic systems, are involved in the antagonizing effect of paeoniflorin on the scopolamine deficit in radial maze performance in rats.
Journal
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- The Japanese Journal of Pharmacology
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The Japanese Journal of Pharmacology 62 (4), 345-349, 1993
The Japanese Pharmacological Society
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Details 詳細情報について
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- CRID
- 1390001204285005440
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- NII Article ID
- 130000840367
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- NII Book ID
- AA00691188
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- COI
- 1:CAS:528:DyaK3sXmtFyisLs%3D
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- ISSN
- 13473506
- 00215198
- http://id.crossref.org/issn/00215198
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- PubMed
- 8230861
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed