阿片μ及δ受体与胎兔窘迫发生的关系

目的　探讨阿片 μ受体及δ受体与胎兔窘迫发生的关系。 方法　将 16只孕 30d母兔以窒息法制成胎兔宫内窘迫模型 ,迅速剖宫取出胎兔 ,每窝 6～ 8只 ,将胎兔分为胎兔窘迫未治疗组(胎窘组 ,2 9只 )、胎兔窘迫生理盐水治疗组 (盐水组 ,2 5只 )、胎兔窘迫 β FNA治疗组 (FNA组 ,2 8只 )、胎兔窘迫ICI1 74 86 4治疗组 (ICI组 ,31只 ) ;后 3组母兔窒息前分别静脉注入生理盐水、阿片 μ受体拮抗剂β FNA及阿片δ受体拮抗剂ICI1 74 86 4。另选 4只孕 30d母兔断颈处死后 ,剖宫取出胎兔 2 8只作为对照组。以上 5组胎兔均于剖宫产后 1、5、10、15、30min进行呼吸、心率、肤色、肌张力、神经反射的Apgar评分。结果　 (1)对照组胎兔呼吸、心率、肤色、肌张力、神经反射的Apgar总评分最高 ,为 (8 8± 1 1)分。FNA组和ICI组胎兔的Apgar总评分分别为 (6 8± 1 7)分和 (4 9± 0 7)分 ,显著高于胎窘组及盐水组的 (2 1± 1 0 )分和 (2 5± 1 1)分 (P <0 0 1及P <0 0 5 ) ;而胎窘组及盐水组之间比较 ,差异无显著性 (P >0 0 5 )。(2 )FNA组胎兔Apgar总评分与对照组相比 ,差异无显著性 (P >0 0 5 ) ,而胎窘组、盐水组及ICI组胎兔Apgar评分与对照组比较 ,则显著降低 (P <0 0 1及P <0 0 5 )。 (3)FNA组胎兔Apgar评分各

Study on the relationship between opioid receptors and fetal distress

OBJECTIVE: To evaluate the role of opioid receptors in the fatal distress. METHODS: Pregnant near-term rabbits were given an intravenous dose of normal saline solution or the opiate antagonist beta-FNA and ICI and then asphyxiated. The rabbit fetus were delivered by cesarean section and evaluated for respiration, heart beat, color, muscle tone, and response to stimulation at 1, 5, 10, 15, and 30 minutes of age. RESULTS: The FNA-treated pups (6.8 +/- 1.7) and the ICI-treated pups (4.9 +/- 0.7) had significantly better scores than the saline-treated pups (2.5 +/- 1.1) and the fetal distress group (2.1 +/- 1.0, P < 0.01 and P < 0.05); there was no statistical difference between the saline group and the non treated pups (P > 0.05). The Apgar scores in ICI group, saline group, and fetal distress group were significantly decreased than that in control group (P < 0.01 and P < 0.05); Scores of all five subjects could be raised markedly in FNA group, there was no significant difference in the FNA-treated pups and the control group (P > 0.05). CONCLUSIONS: These results suggested that both mu- and delta- receptors participated in conducting the endogenous opioid peptides effect, it was associated with the pathophysiological changes in fetal distress; mu- receptor was much more important between the two.