猫延髓头侧腹外侧区注射内皮素-1对猫心血管活动的影响

被引:2
作者
杨新良
富维骏
侯钢星
陈建国
机构
[1] 第二军医大学基础医学院生理学教研室!上海
[2] 中国
关键词
内皮素-1; 心率; 血压; 延髓; 美托洛尔; 酚妥拉明; 交感神经系统; 迷走神经切断术;
D O I
暂无
中图分类号
R96 [药理学];
学科分类号
100602 ; 100706 ;
摘要
研究内皮素-1(ET-1)在猫延髓头侧腹外侧区(rVLM)对心血管活动的影响.方法:采用脑立体定向和脑内微量注射技术.结果:rVLM内微量注射 ET-1(4μmol·L-1, 0.5μL)后,平均动脉压(MAP)升高(3.7±1.3)kPa,心率增加(29±7)beats·min-1,肾神经活动增加 45%±10%,量-效呈正相关.双颈部迷走神经切断后不影响上述结果.静脉预先给予酚妥拉明 5 mg·kg-1能显著抑制ET-1的升压作用.血浆精氨酸升压素(Arg)含量由(12.4± 6. 5) ng· L-1增加到(70.3± 24. 2)ng·L-1,并与MAP变化显著相关,使缺血心脏心律紊乱(HRhD),HRhD出现在结扎后(4.8±2.9)min,评分为 4.4±1.6,与对照组差异显著.结论:rVLM内注射ET-1影响了心血管和交感神经活动的中枢调节。
引用
收藏
页码:566 / 570
页数:5
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