自体血栓性家兔局部脑缺血性梗死模型的建立

Establishment of a new rabbit model of ischemic cerebral infarction by autologous clot embolism

目的介绍一种简单、实用的自体血栓性家兔局部脑缺血性梗死模型。方法采用家兔自体动脉血栓,经颈外动脉插管栓塞大脑中动脉,造成局部脑缺血性梗死。利用临床观察、2,3,5-氯化三苯基四氮唑(TTC)染色及HE染色评价大脑中动脉闭塞效果及脑组织病理学变化。结果实验组术后醒来可观察到家兔出现不同程度的偏瘫症状,大脑中动脉阻塞6h以后TTC染色均证实脑梗死存在。HE染色后,光镜观察可见:脑梗死灶的病理变化有随缺血时间延长而加重的现象。对照组未出现以上症状及病变。结论往家兔颈内动脉导入自体血栓栓塞大脑中动脉,接近临床局灶性脑梗死的发病过程,能够既简便又稳定的建立局灶性脑缺血模型。此模型对研究脑血管病损伤机制和防治措施有着切实临床应用价值。

Objective To establish a convenient method for preparing rabbit models of ischemic cerebral infarction using autologous clot embolism. Methods Ischemic cerebral infarction was induced in rabbits by embolizing the middle cerebral artery using autologous clot emboli. Clinical and histological observations were carried out to evaluate the validity of the animal model. Results Hemiplegia of different severities was observed in the rabbits after the operation. TTC and HE staining of the brain sections confirmed ischemic cerebral infarction 6 h after obstructing the middle cerebral artery with the autologous clot emboli. Conclusion Embolizing the middle cerebral artery using the autologous emboli is convenient to induce focal ischemic cerebral infarction in rabbits. This model has practical value in the study on the mechanism of ischemic cerebrovascular disease and in developing new strategies for prevention and treatment of the relevant diseases in human.