Abstract
Objectives
We aimed to detect early changes of the blood–brain barrier permeability (BBBP) in acute ischaemic stroke (AIS), with or without reperfusion, and find out whether BBBP can predict clinical outcomes.
Methods
Consecutive AIS patients imaged with computed tomographic perfusion (CTP) before and 24 h after treatment were included. The relative permeability–surface area product (rPS) was calculated within the hypoperfused region (rPShypo-i), non-hypoperfused region of ischaemic hemisphere (rPSnonhypo-i) and their contralateral mirror regions (rPShypo-c and rPSnonhypo-c). The changes of rPS were analysed using analysis of variance (ANOVA) with repeated measures. Logistic regression was used to identify independent predictors of unfavourable outcome.
Results
Fifty-six patients were included in the analysis, median age was 76 (IQR 62–81) years and 28 (50%) were female. From baseline to 24 h after treatment, rPShypo-i, rPSnonhypo-i and rPShypo-c all decreased significantly. The decreases in rPShypo-i and rPShypo-c were larger in the reperfusion group than non-reperfusion group. The rPShypo-i at follow-up was a predictor for unfavourable outcome (OR 1.131; 95% CI 1.018–1.256; P = 0.022).
Conclusion
Early disruption of BBB in AIS is reversible, particularly when greater reperfusion is achieved. Elevated BBBP at 24 h after treatment, not the pretreatment BBBP, predicts unfavourable outcome.
Key points
• Early disruption of blood–brain barrier (BBB) in stroke is reversible after treatment.
• The reversibility of BBB permeability is associated with reperfusion.
• Unfavourable outcome is associated with BBB permeability at 24 h after treatment.
• Contralateral non-ischaemic hemisphere is not ‘normal’ during an acute stroke.
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Abbreviations
- AATH:
-
adiabatic approximation of tissue homogeneity
- AIS:
-
acute ischaemic stroke
- ANOVA:
-
analysis of variance
- BBB:
-
blood–brain barrier
- BBBP:
-
BBB permeability
- CBF:
-
cerebral blood flow
- CBV:
-
cerebral blood volume
- CI:
-
confidence interval
- CTP:
-
computed tomographic perfusion
- ECs:
-
endothelial cells
- HT:
-
haemorrhagic transformation
- IQR:
-
interquartile range
- IVT:
-
intravenous thrombolysis
- mRS:
-
modified Rankin Scale
- NIHSS:
-
National Institutes of Health Stroke Scale
- ONT:
-
onset-to-needle time
- OR:
-
odds ratio
- PS:
-
permeability–surface area product
- rCBF:
-
relative CBF
- ROI:
-
regions of interest
- rPS:
-
relative PS
- rPShypo-c :
-
rPS of contralateral mirror hypoperfusion region
- rPShypo-i :
-
rPS of ipsilateral hypoperfusion region
- rPSnonhypo-c :
-
rPS of contralateral mirror non-hypoperfusion region
- rPSnonhypo-i :
-
rPS of ipsilateral non-hypoperfusion region
- RR:
-
reperfusion rate
- TJPs:
-
tight junction proteins
- tPA:
-
tissue-type plasminogen activator
- VPCT:
-
volume perfusion CT
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The scientific guarantor of this publication is Min Lou.
Conflict of interest
The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
Funding
This work was supported by the National Natural Science Foundation of China (81471170 & 81622017 & 81601017) and the National Key Research and Development Program of China (2016 YFC 1301500). The perfusion analysis software (MIStar) was provided to the site as part of their involvement in the International Stroke Perfusion Imaging Registry (INSPIRE, www.Inspire.apollomit.com/), study funded by the National Health and Medical Research Council of Australia.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Informed consent
Written informed consent was obtained from all subjects (patients) in this study.
Ethical approval
Institutional review board approval was obtained.
Methodology
• retrospective
• observational
• performed at one institution
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Liu, C., Zhang, S., Yan, S. et al. Reperfusion facilitates reversible disruption of the human blood–brain barrier following acute ischaemic stroke. Eur Radiol 28, 642–649 (2018). https://doi.org/10.1007/s00330-017-5025-3
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DOI: https://doi.org/10.1007/s00330-017-5025-3