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Benefits of hypothermia in neonatal arterial ischemic strokes: a preclinical study

Abstract : BACKGROUND: There is currently no targeted treatment available for neonatal arterial ischemic strokes (NAIS). Epidemiological studies demonstrated that perinatal infection/inflammation, peripartum hypoxia, and occlusion of the internal carotid tree are the main determinants of NAIS. The well-established benefit of therapeutic hypothermia (HT) in neonatal encephalopathy due to diffuse hypoxia-ischemia provides a rationale for the potential use of HT as a neuroprotective strategy in NAIS. METHODS: We used a rat model to reproduce the most prevalent human physiopathological scenario of NAIS. The neuroprotective effect of HT was measured by morphometric magnetic resonance imaging, [18 F] fluorodeoxyglucose (FDG) metabolic activity by positron emission tomography/computed tomography, and behavioral tests. RESULTS: HT (i) prevented the occurrence of 44% of NAIS, (ii) reduced the volume of strokes by 37%, (iii) enhanced [18 F] FDG metabolic activity within the territory of the occluded carotid artery, and (iv) improved motor behavior. Both morphometric and metabolic techniques showed consistently that HT provided a neuroprotective effect located in the motor cortex, hippocampus and caudate-putamen. CONCLUSION: Through combining anatomical, metabolic imaging and behavioral studies, our study provides evidence of neuroprotective effects of HT in NAIS. These results are potentially translational to human NAIS. This article is protected by copyright. All rights reserved.
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https://hal.univ-angers.fr/hal-02510281
Contributeur : Marie-Françoise Gerard <>
Soumis le : mardi 17 mars 2020 - 16:09:24
Dernière modification le : mercredi 18 mars 2020 - 01:06:05

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Mathilde Chevin, Stéphane Chabrier, Mickaël Dinomais, Barry Bedell, Guillaume Sébire. Benefits of hypothermia in neonatal arterial ischemic strokes: a preclinical study. International Journal of Developmental Neuroscience, Elsevier, 2020, ⟨10.1002/jdn.10022⟩. ⟨hal-02510281⟩

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