Abstract
Stroke remains a leading global cause of death and disability. In the last decade, the therapeutic window for mechanical thrombectomy has increased from a maximum of 6 to 24 h and beyond. While endovascular advancements have improved rates of recanalization, no post-stroke pharmacotherapeutics have been effective in enhancing neurorepair and recovery. New experimental models are needed to closer mimic the human patient. Our group has developed a model of transient 5-h occlusion in rats to mimic stroke patients undergoing thrombectomy. Our procedure was designed specifically in aged rats and was optimized based on sex in order to keep mortality and extent of injury consistent between aged male and female rats. This model uses a neurological assessment modeled after the NIH Stroke Scale. Finally, the potential for translation between our rat model of stroke and humans was assessed using comparative gene expression for key inflammatory genes. This model will be useful in the evaluation of therapeutic targets to develop adjuvant treatments for large vessel occlusion during the thrombectomy procedure.
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Acknowledgements
Beverly Meacham (Senior Radiology Technologist) and David Powell (Assistant Professor) with The Magnetic Resonance Imaging and Spectroscopy Center. NIH Shared Instrumentation Program Grant for the 7T ClinScan. S10 (1S10RR029541-01).
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National Institute of Neurological Disorders and Stroke (5R01NS091146-04).
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SM performed surgeries, and SM and JF analyzed the data. KS wrote the manuscript with exception of methods (SM and JF). CM analyzed behavioral data. DL analyzed infarct and edema data. TH and AL analyzed the cerebral perfusion data. KRP, SM, and JF planned experiments and edited the manuscript. JFF performed human thrombectomy surgeries and JFF and KRP oversaw the formulation of the project and edited the manuscript.
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KRP and JFF co-founders of Cerelux, LLC.
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Messmer, S.J., Salmeron, K.E., Frank, J.A. et al. Extended Middle Cerebral Artery Occlusion (MCAO) Model to Mirror Stroke Patients Undergoing Thrombectomy. Transl. Stroke Res. 13, 604–615 (2022). https://doi.org/10.1007/s12975-021-00936-y
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DOI: https://doi.org/10.1007/s12975-021-00936-y