Abstract TP124: Early Neurological Improvement Can Reduce Intensive Care Unit Length Of Stay In Aneurysmal Subarachnoid Hemorrhage

Stroke, Volume 53, Issue Suppl_1, Page ATP124-ATP124, February 1, 2022. Introduction:Aneurysmal Subarachnoid Hemorrhage (aSAH) is often accompanied by an extended length of stay (LOS) in the intensive care unit (ICU), at tremendous cost to both the hospital system and the patient. We sought to determine predictors for ICU LOS in these patients.Methods:We performed a retrospective study of a cohort of consecutive patients with aSAH admitted to an academic referral center from 2016 to 2021. Multiple linear regression was performed in survivors to identify predictors for ICU LOS among factors present on admission and those related to hospital course.Results:In a cohort of 306 patients with confirmed aSAH, mean age was 57 years (SD 13.7), 61% were female and 70% were white. ICU LOS was longer for survivors (median 19 days, IQR 14-25) than for non-survivors (median 5 days, IQR 2-8; p

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Febbraio 2022

Nanoliposomes Reduce Stroke Injury Following Middle Cerebral Artery Occlusion in Mice

Stroke, Volume 53, Issue 2, Page e37-e41, February 1, 2022. Background and Purpose:Neuroprotective strategies for stroke remain inadequate. Nanoliposomes comprised of phosphatidylcholine, cholesterol, and monosialogangliosides (nanoliposomes) induced an antioxidant protective response in endothelial cells exposed to amyloid insults. We tested the hypotheses that nanoliposomes will preserve human neuroblastoma (SH-SY5Y) and human brain microvascular endothelial cells viability following oxygen-glucose deprivation (OGD)–reoxygenation and will reduce injury in mice following middle cerebral artery occlusion.Methods:SH-SY5Y and human brain microvascular endothelial cells were exposed to oxygen-glucose deprivation–reoxygenation (3 hours 0.5%–1% oxygen and glucose-free media followed by 20-hour ambient air/regular media) without or with nanoliposomes (300 µg/mL). Viability was measured (calcein-acetoxymethyl fluorescence) and protein expression of antioxidant proteins HO-1 (heme oxygenase-1), NQO1 (NAD[P]H quinone dehydrogenase 1), and SOD1 (superoxide dismutase 1) were measured by Western blot. C57BL/6J mice were treated with saline (n=8) or nanoliposomes (10 mg/mL lipid, 200 µL, n=7) while undergoing 60-minute middle cerebral artery occlusion followed by reperfusion. Day 2 postinjury neurological impairment score and infarction size were compared.Results:SH-SY5Y and human brain microvascular endothelial cells showed reduced viability post–oxygen-glucose deprivation–reoxygenation that was reversed by nanoliposomes. Nanoliposomes increased protein expressions of HO-1, NQO1 in both cell types and SOD1 in human brain microvascular endothelial cells. Nanoliposomes-treated mice showed reduced neurological impairment and brain infarct size (18.8±2% versus 27.3±2.3%,P=0.017) versus controls.Conclusions:Nanoliposomes reduced stroke injury in mice subjected to middle cerebral artery occlusion likely through induction of an antioxidant protective response. Nanoliposome is a candidate novel agent for stroke.

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Novembre 2021