不同月龄C57BL/6小鼠大脑皮质功能区的微血管形态计量学分析  

Microvascular morphometric analysis of cerebral cortical functional areas in C57BL/6 mice of various ages

作　　者：郭民 郭永昌 张瑞虎 张引红 王海龙[2] 陈朝阳 GUO Min;GUO Yongchang;ZHANG Ruihu;ZHANG Yinhong;WANG Hailong;CHEN Zhaoyang(Laboratory Animal Center,Shanxi Medical University,Taiyuan 030001;China.2.Basic Medical Research Center,Shanxi Medical University,Jinzhong 030600)

机构地区：[1]山西医科大学实验动物中心,太原030001 [2]山西医科大学基础医学研究中心,山西晋中030600

出　　处：《中国比较医学杂志》2023年第12期1-6,共6页Chinese Journal of Comparative Medicine

基　　金：国家重点研发计划项目(2021YFF0702805)。

摘　　要：目的 观察不同月龄C57BL/6小鼠大脑皮质不同功能区的微血管构筑,并进行定量分析。方法 采用改良碱性磷酸酶染色法染色C57BL/6小鼠大脑皮质运动皮质区(初级运动皮层、次级运动皮层)、感觉皮质区(初级体感皮层、次级体感皮层)、视觉皮质区(初级视觉皮层、次级视觉皮层)、听觉皮质区(初级听觉皮层、次级听觉皮层)、嗅觉皮质区(外嗅皮层、内嗅皮层)的微血管形态,OLMPUS BX51显微镜结合Image-Pro Plus 5.1进行图像捕获,采用Image-Pro Plus 5.1软件进行微血管长度密度(mlcrovascular length density, Lv)、微血管表面积密度(microvascular surface area density, Sv)、微血管体积密度(microvascular volume density, Vv)的定量分析。结果 碱性磷酸酶在成年组和老年组的大脑皮质微血管内表达丰富,在幼年组略有表达,而在乳鼠组无表达;软脑膜血管进入皮质的方式分T字形、Y字形、大弧形和小弧形四种;相同年龄不同部位的Lv、Sv和Vv显示运动皮质区、感觉皮质区、视觉皮质区、听觉皮质区、嗅觉皮质区呈现下降趋势,且运动皮质区和感觉皮质区与嗅觉皮质区比较Lv、Sv、Vv微血管密度有统计学意义(P<0.05)。老年组的各功能区血管密度均较成年组降低,但无统计学意义(P>0.05)。结论 C57BL/6小鼠大脑皮质不同功能区微血管内碱性磷酸酶的表达随年龄增长而增多,成年时达到峰值,其脑内微血管构筑为脑血管疾病及模型制备提供形态学参数。Objective To observe and analyze functional areas of the cerebral cortex in C57BL/6 mice of various ages.Methods Improved alkaline phosphatase staining was used to reveal the microvascular morphology of the cerebral cortex in C57BL/6 mice,including the motor cortex(primary and secondary motor cortex),sensory cortex(primary and secondary somatosensory cortex),visual cortex(primary and secondary visual cortex),and auditory cortex(primary and secondary auditory cortex),olfactory cortex(extrarhinal and entorhinal cortex).Images were captured under an OLYMPUS BX51 microscope with Image-Pro Plus 5.1 software.The microvascular length density(Lv),microvascular surface area density(Sv),and microvascular volume density(Vv)were analyzed by Image-Pro Plus 5.1 software.Results Expression of alkaline phosphatase was abundant in cerebral cortical microvessels of adult and elderly mice,and slightly expressed in juvenile mice,but not in lactating mice.Pial blood vessels enter the cortex in T shape,Y shape,large arc,and small arc four manners.Lv,Sv and Vv in different parts of the same aged mice showed a decreasing trend in motor,sensory,visual,auditory and olfactory cortexes,and the microvascular density of Lv,Sv and Vv in motor and sensory cortexes was statistically significant compared with the olfactory cortex(P<0.05).The vascular density in all functional areas in elderly mice was lower than that in adult mice,but no statistical significance was found(P>0.05).Conclusions The expression of alkaline phosphatase in microvessels in functional areas of the cerebral cortex in C57BL/6 mice increases with age and reached its peak value in adulthood.The microvascular architecture in the brain provides morphological parameters to establish cerebrovascular disease models.

关 键 词：碱性磷酸酶染色 C57BL/6小鼠 大脑皮质 微血管构筑 

分 类 号：R-33[医药卫生]