【摘要】 目的　探讨可乐定对眼内压 (IOP)的影响以及中枢α 肾上腺素能神经元作用的机制。方法　 3种不同方法给药 :(1)眼球表面滴注可乐定 ;(2 )侧脑室内微量注射育亨宾或哌唑嗪后 ,再分别用可乐定侧脑室内注射和滴眼 ;(3)蓝斑内微量注射可乐定 ,分别观察IOP的变化。结果　可乐定 3种给药方法均有明显降低IOP的效应 ,脑室注射育亨宾能翻转可乐定脑室注射和滴眼降低IOP的效应。结论　通过外周或中枢给可乐定都能降低IOP ,说明中枢α2 受体参与了这一作用更多还原

【Abstract】 AIM To investigate the effect of clonidine on intraocular pressure(IOP) and the possible role in which α adrenergic mechanism plays. METHODS The change on IOP was observed following clonidine administered via three different routes: (1)clonidine topically administered to eyes; (2)clonidine intracerebroventricularly injected (icv)or topically administered after yohimbine or prazosin icv; (3)microinjection of clonidine into locus coeruleus(LC). RESULTS Clonidine decreased IOP significantly, α 2 adrenoceptor antagonist, but not α 1 adrenoceptor antagonist, can reverse the decreasing effect on IOP caused by clonidine icv and administered topically. CONCLUSION Clonidine administered both topically or intracranially can decrease IOP;α 2 adrenoceptor in central nervous system is involved in this effect.更多还原