脑缺血海马CA1区5-HT变化的免疫组织化学研究

目的：观察脑缺血及缺血再灌流海马ＣＡ１区５－ＨＴ的变化，探讨脑缺血海马ＣＡ１区神经元损伤与５－ＨＴ变化的关系。方法：用免疫组织化学ＡＢＣ法及图像分析技术对沙土鼠脑缺血海马ＣＡ１区５－ＨＴ含量变化进行研究。结果：（１）脑缺血１０ｍｉｎ时，沙土鼠海马ＣＡ１区５－ＨＴ免疫反应阳必纤维的平均光密度值（ＯＤ）与对照组比较无显著性差异。而缺血３０ｍｉｎ时，ＯＤ值则下降，４ｈ时下降得更多，Ｐ〈０．０５。（２）脑

IMMUNOHISTOCHEMICAL STUDY ON CHANGE OF 5-HT IN CA1 SECTOR OF HIPPOCAMPUS FOLLOWING CEREBRAL ISCHEMIA

Objective: To observe the change of 5-HT in CA1 sector of hippocampus in gerbils followingcerebral ischemia and reperfusion for discussing the relationship between the damage of neuronsin CA1 sector and the change of 5-HT after cerebral ischemia. Methods: The change of 5-HT inCA1 sector of hippocampus in gerbils following cerebral ischemia and reperfusion was examinedby ABC method of immunohistochemistry and image analysis technique. Results: (1) The meanvalue of optic density (OD) of 5-HT immunoreaction fiber in CA1 sector had no significant difference between the 10 min ischemic treated group and control group, whereas the OD of 5-HT wasdecreased significantly in 30 min and 4 h ischemia treated group. (2) The OD of 5-HT immunoreaction fiber in CA1 was decreased in 10 min cerebral ischemia following 30 min and 4 h reperfusion and was the lowest after 24 h reperfusion. After 36 h reperfusion, the OD became normalgradually. Conclusion: The content of 5-HT in CA1 sector of hippocampus is decreased in cerebral ischemia and reperfusion. The change of 5-HT may be involved in neuron damage of CA1 incerebral ischemia and reperfusion.