FOOTSHOCK STRESS-INDUCED SUPERSENSITIVITY TO ISOPRENALINE IN THE ISOLATED PACEMAKER OF THE RAT - EFFECTS OF THE COMPOUNDS RU-38486 AND RU-28362

被引：20
作者：
NOURANI, FRR
SPADARI, RC
DEMORAES, S
机构：
[1] UNIV SAO PAULO, INST BIOMED SCI, DEPT PHARMACOL, SAO PAULO, BRAZIL
[2] UNIV FED CEARA, DEPT PHYSIOL & PHARMACOL, HLTH SCI CTR, BR-60000 FORTALEZA, CEARA, BRAZIL
[3] UNIV ESTADUAL CAMPINAS, INST BIOL, DEPT PHYSIOL & BIOPHYS, BR-13100 CAMPINAS, SP, BRAZIL
来源：
GENERAL PHARMACOLOGY-THE VASCULAR SYSTEM | 1992年 / 23卷 / 04期
关键词：
D O I：
10.1016/0306-3623(92)90167-I
中图分类号：
R9 [药学];
学科分类号：
1007 ;
摘要：
1. Three daily sessions of inescapable footshock stress of 30 min duration each increased the sensitivity of the isolated pacemaker of the rat to the chronotropic effect of isoprenaline. 2. The effect of inescapable footshock stress on the sensitivity of the isolated rat pacemaker to the chronotropic effect of isoprenaline was prevented by the daily administration of the compound RU-38486, a potent antiglucocorticoid which blocks the cytosolic receptor for corticosterone. 3. The administration of the compound RU-28362. a potent agonist of the cytosolic receptor for corticosterone, during 3 days to rats which were not submitted to footshock stress induces supersensitivity to the chronotropic effect of isoprenaline. 4. It is concluded that corticosterone plays an important role in the qualitative control of the rat pacemaker beta-adrenoceptor population during adaptation to repeated footshock stress.
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页码：787 / 791
页数：5
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