Evaluation of cerebral microcirculation in a mouse model of systemic inflammation.

Autor:	Zhang C; Polytechnique Montreal, Department of Electrical Engineering, Montreal, Quebec, Canada.; Montreal Heart Institute, Research center, Montreal, Quebec, Canada., Jamshidi M; University of Illinois at Chicago, Department of Biomedical Engineering, Chicago, Illinois, United States., Delafontaine-Martel P; Polytechnique Montreal, Department of Electrical Engineering, Montreal, Quebec, Canada.; Montreal Heart Institute, Research center, Montreal, Quebec, Canada., Linninger AA; University of Illinois at Chicago, Department of Biomedical Engineering, Chicago, Illinois, United States.; University of Illinois at Chicago, Department of Neurosurgery, Chicago, Illinois, United States., Lesage F; Polytechnique Montreal, Department of Electrical Engineering, Montreal, Quebec, Canada.; Montreal Heart Institute, Research center, Montreal, Quebec, Canada.
Jazyk:	angličtina
Zdroj:	Neurophotonics [Neurophotonics] 2024 Jul; Vol. 11 (3), pp. 035003. Date of Electronic Publication: 2024 Jul 15.
DOI:	10.1117/1.NPh.11.3.035003
Abstrakt:	Significance: Perturbations in the microcirculatory system have been observed in neurological conditions, such as Alzheimer's disease or systemic inflammation. However, changes occurring at the level of the capillary are difficult to translate to biomarkers that could be measured macroscopically. Aim: We aim to evaluate whether transit time changes reflect capillary stalling and to what degree. Approach: We employ a combined spectral optical coherence tomography (OCT) and fluorescence optical imaging (FOI) system to investigate the relation between capillary stalling and transit time in a mouse model of systemic inflammation induced by intraperitoneal injection of lipopolysaccharide. Angiograms are obtained using OCT, and fluorescence signal images are acquired by the FOI system upon intravenous injection of fluorescein isothiocyanate via a catheter inserted into the tail vein. Results: Our findings reveal that lipopolysaccharide (LPS) administration significantly increases both the percentage and duration of capillary stalling compared to mice receiving a 0.9% saline injection. Moreover, LPS-induced mice exhibit significantly prolonged arteriovenous transit time compared to control mice. Conclusions: These observations suggest that capillary stalling, induced by inflammation, modulates cerebral mean transit time, a measure that has translational potential. (© 2024 The Authors.)
Databáze:	MEDLINE
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