Serial MRI, functional recovery, and long-term infarct maturation in a non-human primate model of stroke

被引:25
作者
Marshall, JWB
Ridley, RM
Baker, HF
Hall, LD
Carpenter, TA
Wood, NI
机构
[1] Univ Cambridge, Dept Expt Psychol, MRC, Comparat Cognit Team, Cambridge CB2 3EB, England
[2] Univ Cambridge, Herchel Smith Lab Med Chem, Cambridge CB2 2PZ, England
关键词
marmoset monkeys; ischaemia; magnetic resonance imaging; behaviour;
D O I
10.1016/S0361-9230(03)00214-4
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We have examined the effects of permanent middle cerebral artery occlusion (pMCAO) in marmoset monkeys over 5 months, using behavioural and magnetic resonance imaging (MRI) techniques. Three marmosets were trained on behavioural tests before pMCAO. Shortly after surgery, these marmosets were scanned with T-2-weighted (T2W) and diffusion-weighted (DW) MRI. Three, 10 and 20 weeks after surgery, these marmosets were re-tested on the behavioural tasks and had further MRI sessions to monitor lesion development. This was followed by histological analysis. All these marmosets had a persistent contralesional motor deficit and a spatial neglect which resolved over the 20 weeks of testing. Percentage infarct volume assessed by MRI on the day of surgery and at 20 weeks matched the percentage infarct volume measured histologically at 20 weeks. However, the apparent infarct size at 3 weeks was considerably less than that measured by histological analysis or that measured at the other MRI time points. Additional histological analysis of the brains of two further marmosets removed 3 weeks after pMCAO found considerable infiltration by lipid filled macrophages into the ischaemic zone which may have caused an MRI "fogging" effect leading to an apparent reduction in infarct volume. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码:577 / 585
页数:9
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