颉颃药印防己毒不能阻断GABA对肝片形吸虫的兴奋效应，但能部分阻断对鸡蛔虫的抑制效应。
It was found that the antagonist picrotoxin was unable to block the liver fluke to the excitatory effect of GABA, while it could partially block the roundworm to the inhibitory effect of GABA.
事先用氨基酸脱羧酶抑制剂异烟肼处理，或用GABA受体拮抗剂印防己毒素处理，可阻遏安定减低膈神经放电幅度的作用。
Pretreatment of either isoniazid, an aminoacid decarboxylase inhibitor, or GABA receptor antagonist picrotoxin prevented thedepressant effect of diazepam on the amplitude of phrenic discharge.
结论：褪黑素延长小鼠睡眠时间的作用与褪黑素3型受体无关，而与GABAA受体关系密切，其作用主要由印防己毒素结合位点介导。
Conclusion: Melatonin does not exhibit its potentiation sleeping time in mice through melatonin 3 receptor. Hypnotic activity of melatonin may be mediated through picrotoxin site on GABAA receptor.
结论：褪黑素延长小鼠睡眠时间的作用与褪黑素3型受体无关，而与GABAA受体关系密切，其作用主要由印防己毒素结合位点介导。
Conclusion: Melatonin does not exhibit its potentiation sleeping time in mice through melatonin 3 receptor. Hypnotic activity of melatonin may be mediated through picrotoxin site on GABAA receptor.
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