【摘要】 目的:探讨多发性梗塞性脑痴呆(MID)与脑区内生长抑素(SS)、精氨酸加压素(AVP)和P物质(SP)的相关性及临床意义。方法:建立MID大鼠模型,对该模型及假手术对照组大鼠进行记忆行为测试,并用放射免疫分析(RIA)测定脑区(额区皮质、颞区皮质、海马、丘脑和纹状体)中SS、AVP、SP的含量。结果:在10d的记忆测试中,第1d两组大鼠出错次数均无明显差别,第3d到第10d,模型组大鼠出错次数均明显高于假手术对照组(P<0.05)。模型组的额区皮质、颞区皮质、海马、丘脑和纹状体中SS、AVP相对含量均较假手术对照组有显著下降(P<0.05,P<0.01);SP含量除在丘脑区无显著性差异外(P>0.05),在其余四个脑区均有显著降低(P<0.05,P<0.01)。结论:动物学习、记忆功能障碍可能与多发性脑梗塞后SS、AVP和SP含量下降有关。更多还原

【Abstract】 Objective To investigate the significance of changes of cerebral contents of the neuropeptides somatostatin (SS), arginine vasopressin (AVP) and substance P in rat models of MID. Methods The rat models consisted of 15 rats andergoing intracarotid injection of autogenous thrombus powder. Another group of 15 rats undergoing sham operation served as controls. Learning and memory ability in these rats was assessed with daily passive avoidance task testing for 10 consecutive days. The animals were sacrificed on 30d and contents of the neuropeptides in tissue homogenate from different areas of brain (frontal cortex, temproal cortex, hippocampus, thalamus and corpas striatum) were measured with (RIA). Results On the first day of passive avoidance task testing, the frequency of errors in the MID group and the control group was about the same. From the third day on, the frequency of errors in the MID group was significantly higher than that in the control group (P<0.05). The neropeptides contents of all these cerebral areas in the MID group were significantly higher than those in the control gorup (P<0.05 or P<0.01) with the only exception of the contents of substance P in thalamus (no significant difference between the contents in the two groups). Conclusion The impairment of learning and memory in rat models with MID was possibly related to the lowered contents of SS, AVP and substance P in the brain tisssue.更多还原