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Stroke. 2003 Mar;34(3):671-5. Epub 2003 Feb 20.

Levels of anti-inflammatory cytokines and neurological worsening in acute ischemic stroke.

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1
Hospital Clínic, Clinical Institute of Nervous System Diseases, Instituto Investigaciones Biomédicas August Pi i Sunyer, Villaroel 170, 08036 Barcelona, Spain.

Abstract

BACKGROUND:

Mechanisms involved in stroke progression are incompletely understood. Ischemic brain injury is characterized by acute local inflammatory response mediated by cytokines. Anti-inflammatory cytokines act in a feedback loop to inhibit continued proinflammatory cytokine production. We assessed the implication of interleukin (IL)-10 and IL-4 in deteriorating ischemic stroke.

METHODS:

Two hundred thirty-one patients with ischemic stroke within the first 24 hours from onset were included. Neurological worsening was defined when the Canadian Stroke Scale score fell at least 1 point during the first 48 hours after admission. Anti-inflammatory cytokines were determined in plasma obtained on admission.

RESULTS:

Eighty-three patients (35.9%) worsened within the first 48 hours after stroke onset. Significantly lower concentrations of IL-10 were found in patients with neurological worsening (P<0.05), but IL-4 levels were similar in patients with or without deterioration. Lower plasma concentrations of IL-10 (<6 pg/mL) were associated with clinical worsening on multivariate analysis (odds ratio=3.1, 95% CI=1.1 to 8.9) independently of hyperthermia, hyperglycemia, or neurological condition on admission. Further analysis disclosed that early worsening was independently associated with lower IL-10 plasma levels in patients with subcortical infarcts or lacunar stroke but not in patients with cortical lesions.

CONCLUSIONS:

Anti-inflammatory cytokine IL-10 is associated with the early clinical course of patients with acute ischemic stroke, especially in patients with small vessel disease or subcortical infarctions.

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