氯胺酮、丙泊酚和羟丁酸钠遗忘作用与NMDA受体的关系

目的观察氯胺酮、丙泊酚和羟丁酸钠的遗忘作用与NMDA受体的关系。方法小鼠分别腹腔注射(intraperito-neal injection,ip)氯胺酮(20 mg.kg-1)、丙泊酚(10 mg.kg-1)或羟丁酸钠(100 mg.kg-1)建立遗忘模型,在跳台实验和避暗实验中分别观察NMDA侧脑室注射(intracerebrov-entricular injection,icv)对遗忘小鼠错误次数(error times,ETs)、跳台潜伏期(step down latency,SDL)、步入潜伏期(step through latency,STL)的影响。结果侧脑室注射NM-DA可减少氯胺酮所致遗忘小鼠的ETs,延长SDL和STL;对丙泊酚或羟丁酸钠所致遗忘小鼠的ETs、SDL和STL无影响。结论 NMDA受体可能是氯胺酮所致遗忘作用的重要靶位,不是丙泊酚或羟丁酸钠所致遗忘作用的靶位。

Relationship between amnestic effect of ketamine,propofol or sodium oxybate and NMDA receptor

Aim To investigate the relationship between amnestic effect of ketamine,propofol or sodium oxybate and NMDA receptor.Methods Amnestic model was established by intraperitoneal injection of ketamine (20 mg·kg~-1),propofol(10 mg·kg~-1) or sodium oxybate(100 mg·kg~-1) respectively in mice before intracerebroventricular injection of NMDA,and then the error times,step down latency and step through latency were observed in the step down test and step through test.Results NMDA by intracerebroventricular injection decreased the error times and increased the step down latency and step through latency of amnestic mice induced by ketamine.It had no significant impact on those of amnestic mice induced by propofol or sodium oxybate.Conclusion NMDA receptor may be an important target for amnestic effect of ketamine,rather than the target for amnestic effect of propofol or sodium oxybate.