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Ischemic stroke is associated with a systemic increase of blood mononuclear cells expressing interleukin-8 mRNA.

Abstract：

BACKGROUND AND PURPOSE:Ischemic brain injury secondary to an arterial occlusion is characterized by acute local inflammation. Blood polymorphonuclear leukocytes (PMNL), primarily neutrophils, adhere to endothelial cells and rapidly invade the injured brain after the arterial occlusion. This neutrophilic invasion might correlate with the production of certain chemoattractants by blood mononuclear cells (MNC). We evaluated mRNA expression of the CXC chemokine interleukin (IL)-8, and the CC chemokines monocyte chemoattractant protein-1, macrophage inflammatory protein (MIP)-1alpha, and MIP-1beta in blood MNC from patients with ischemic stroke. METHODS:Peripheral blood was obtained at 8 AM on days 1 to 7 (mean, day 3) after onset of symptoms. In situ hybridization with radiolabeled synthetic oligonucleotide probes for the chemokines was adopted to measure chemokine mRNA expression in MNC. An enzyme-linked immunosorbent assay for IL-8 was used to measure IL-8 levels in plasma. RESULTS:Most patients with ischemic stroke had high numbers of IL-8 mRNA expressing blood MNC, regardless of the time interval between onset of clinical symptoms and examination. There was a marked difference between patients with ischemic stroke and healthy subjects (median, 6228 versus 885 positive cells per 10(5) MNC; P<.0001). IL-8 levels in plasma correlated positively to IL-8 mRNA expression in examined patients (n=7) with ischemic stroke (r=.78, P<.05). In contrast, mRNA expression for the CC chemokines showed no significant difference between patients with ischemic stroke and healthy control subjects. CONCLUSIONS:This study demonstrated a systemic increase of IL-8 mRNA expressing MNC and IL-8 levels in plasma from patients with ischemic stroke, suggesting that IL-8 could be involved in recruiting blood PMNL to the sites of cerebral ischemia.

journal_name

Stroke

journal_title

Stroke

authors

Kostulas N,Kivisäkk P,Huang Y,Matusevicius D,Kostulas V,Link H

doi

10.1161/01.str.29.2.462

subject

Has Abstract

pub_date

1998-02-01 00:00:00

pages

462-6

issue

2

eissn

0039-2499

issn

1524-4628

journal_volume

29

pub_type

杂志文章

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