医学
胶原酶
脑出血
基底层
病理
病变
血肿
水肿
纤维蛋白
生理盐水
尾状核
脑水肿
麻醉
内科学
外科
免疫学
超微结构
蛛网膜下腔出血
生物化学
酶
化学
作者
Gary A. Rosenberg,Sheila Mun-Bryce,Mary H. Wesley,Mario Kornfeld
出处
期刊:Stroke
[Ovid Technologies (Wolters Kluwer)]
日期:1990-05-01
卷期号:21 (5): 801-807
被引量:524
标识
DOI:10.1161/01.str.21.5.801
摘要
Intracranial bleeding is an important cause of brain masses and edema. To study the pathophysiology of intracerebral hemorrhage, we produced experimental hemorrhages in 53 rats and characterized the lesion by histology, brain water content, and behavior. Adult rats had 2 microliters saline containing 0.5 unit bacterial collagenase infused into the left caudate nucleus. Histologically, erythrocytes were seen around blood vessels at the needle puncture site within the first hour. By 4 hours there were hematomas, the size of which depended on the amount of collagenase injected. Necrotic masses containing fluid, blood cells, and fibrin were seen at 24 hours. Lipid-filled macrophages were observed at 7 days and cysts at 3 weeks. Water content was significantly increased 4, 24, and 48 hours after infusion at the needle puncture site and for 24 hours in posterior brain sections. Behavioral abnormalities were present for 48 hours, with recovery of function occurring during the first week. Brain tissue contains Type IV collagen in the basal lamina. Collagenase, which occurs in an inactive form in cells, is released and activated during injury, leading to disruption of the extracellular matrix. Collagenase-induced intracerebral hemorrhage is a reproducible animal model for the study of the effects of the hematoma and brain edema.
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