Increased Serum Alkaline Phosphatase in Patients with Acute Ischemic Stroke.

Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association(2018)

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Abstract
BACKGROUND:Stroke is one of the most common causes of disability and death. Higher alkaline phosphatase (ALP) levels have been associated with poor functional outcomes and mortality in previous studies. We investigated alterations in serum ALP concentrations and functional outcomes in patients with acute ischemic stroke (AIS). METHODS:Patients with first-ever AIS were recruited to participate in the study. Serum ALP levels were measured using a Cobas Integra 400 Plus automatic biochemical analyzer, and severity of stroke was evaluated using the National Institutes of Health Stroke Scale (NIHSS) score on admission. Functional outcome was measured using the modified Rankin scale 1 year after admission. RESULTS:Serum ALP concentration was increased in patients with AIS (81.75 ± 20.49 versus 69.93 ± 16.12 U/L, P = .000) and the optimal ALP cutoff point for diagnosing patients with AIS was 81.50 U/L, with a sensitivity of 49.5% and specificity of 78.9%. However, there was no significant correlation between ALP and NIHSS scores (r = .170, P = .085) and ALP was not significantly different between favorable and unfavorable functional outcomes (81.76 ± .60 versus 81.70 ± 20.54 U/L, P = .802). CONCLUSIONS:Serum ALP concentration, which was increased in patients with AIS, might represent a low-potency biomarker for the diagnosis of AIS. However, this was not significantly correlated with NIHSS scores or the functional outcome after 1 year.
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Key words
Alkaline phosphatase,biomarker,acute ischemic stroke,functional outcome
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