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Peak Plasma Interleukin-6 and Other Periperhal Markers of Inflammation in tne first week of Ischaemic Stroke Correlate with Brain Infarct Volume, Stroke Severity and Long-term Outcome.
Smith, CJ, Emsley, HCA, Gavin, C, Georgiou, R, Vail, A, Barberan, EM, Del Zoppo, G, Hallenbeck, J, Rothwell, NJ, Hopkins, SJ, Tyrrell, PJ
BMC Neurology. 2004;Jan 15; 4:2.
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Abstract
BackgroundCerebral ischaemia initiates an inflammatory response in the brain and periphery. We assessed the relationship between peak values of plasma interleukin-6 (IL-6) in the first week after ischaemic stroke, with measures of stroke severity and outcome.MethodsThirty-seven patients with ischaemic stroke were prospectively recruited. Plasma IL-6, and other markers of peripheral inflammation, were measured at pre-determined timepoints in the first week after stroke onset. Primary analyses were the association between peak plasma IL-6 concentration with both modified Rankin score (mRS) at 3 months and computed tomography (CT) brain infarct volume.ResultsPeak plasma IL-6 concentration correlated significantly (p < 0.001) with CT brain infarct volume (r = 0.75) and mRS at 3 months (r = 0.72). It correlated similarly with clinical outcome at 12 months or stroke severity. Strong associations were also noted between either peak plasma C-reactive protein (CRP) concentration or white blood cell (WBC) count, and all outcome measures.ConclusionsThese data provide evidence that the magnitude of the peripheral inflammatory response is related to the severity of acute ischaemic stroke, and clinical outcome.