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An MRI Hyperintense Acute Reperfusion Marker Is Related to Elevated Peripheral Monocyte Count in Acute Ischemic Stroke.

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Citation: Journal of Neuroimaging. , 2017 Jul 19PMID: 28722240Institution: MedStar Washington Hospital CenterDepartment: NeurologyForm of publication: Journal ArticleMedline article type(s): Journal ArticleSubject headings: IN PROCESS -- NOT YET INDEXEDYear: 2017 ISSN:

1051-2284

Name of journal: Journal of neuroimaging : official journal of the American Society of NeuroimagingAbstract: BACKGROUND AND PURPOSE: Blood-brain barrier (BBB) disruption detected on magnetic resonance imaging (MRI) in acute ischemic stroke as a hyperintense acute reperfusion marker (HARM) is associated with upregulation of matrix metalloproteinase-9 (MMP-9). Although activated leukocytes, including monocytes, are the main source of MMPs, limited data exist to support relationship between leukocyte activation and BBB disruption in patients with acute ischemic stroke. The goal of this study is to investigate the relationship between neutrophils, lymphocytes, and monocytes with BBB disruption detected as HARM (+) in patients with acute ischemic stroke.CONCLUSION: Increased monocyte count associated with HARM supports importance of systemic inflammation in BBB disruption in acute ischemic stroke. Copyright © 2017 by the American Society of Neuroimaging.METHODS: We conducted a retrospective analysis of prospectively collected data in patients who did not receive any reperfusion therapy with acute (<12 hours) ischemic stroke. MRI scans were obtained at baseline, 24 hours, and 5 days. HARM was evaluated on the 24-hour follow-up scan.RESULTS: Thirty-three patients were studied. HARM was detected in 27% of patients. Median volumes of baseline perfusion (mean transit time [MTT]) deficit (219.4 mL vs. 158.4 mL, P = .029) and DWI infarct growth at 24 hours (18.50 mL vs. .14 mL, P = .017), as well as the median absolute numbers (1 x 103 /mm3 ) of monocytes, were significantly higher in HARM (+) versus HARM (-) patients (0.9 vs. 0.6, p = 0.011).All authors: Benson RT, Hsia AW, Latour LL, Leigh R, Luby M, Lynch JK, Nadareishvili Z, Shah JFiscal year: FY2018Digital Object Identifier:

https://dx.doi.org/10.1111/jon.12462

Date added to catalog: 2017-07-24

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Item type	Current library	Collection	Call number	Status	Date due	Barcode
Journal Article	MedStar Authors Catalog	Article	28722240	Available		28722240

BACKGROUND AND PURPOSE: Blood-brain barrier (BBB) disruption detected on magnetic resonance imaging (MRI) in acute ischemic stroke as a hyperintense acute reperfusion marker (HARM) is associated with upregulation of matrix metalloproteinase-9 (MMP-9). Although activated leukocytes, including monocytes, are the main source of MMPs, limited data exist to support relationship between leukocyte activation and BBB disruption in patients with acute ischemic stroke. The goal of this study is to investigate the relationship between neutrophils, lymphocytes, and monocytes with BBB disruption detected as HARM (+) in patients with acute ischemic stroke.

CONCLUSION: Increased monocyte count associated with HARM supports importance of systemic inflammation in BBB disruption in acute ischemic stroke. Copyright © 2017 by the American Society of Neuroimaging.

METHODS: We conducted a retrospective analysis of prospectively collected data in patients who did not receive any reperfusion therapy with acute (<12 hours) ischemic stroke. MRI scans were obtained at baseline, 24 hours, and 5 days. HARM was evaluated on the 24-hour follow-up scan.

RESULTS: Thirty-three patients were studied. HARM was detected in 27% of patients. Median volumes of baseline perfusion (mean transit time [MTT]) deficit (219.4 mL vs. 158.4 mL, P = .029) and DWI infarct growth at 24 hours (18.50 mL vs. .14 mL, P = .017), as well as the median absolute numbers (1 x 103 /mm3 ) of monocytes, were significantly higher in HARM (+) versus HARM (-) patients (0.9 vs. 0.6, p = 0.011).

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