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- Tuula K Outinen, Laura Tervo, Satu Mäkelä, Reetta Huttunen, Niina Mäenpää, Heini Huhtala, Antti Vaheri, Jukka Mustonen, and Janne Aittoniemi.
- Department of Internal Medicine, Tampere University Hospital, Tampere, Finland ; School of Medicine, University of Tampere, Tampere, Finland.
- Plos One. 2013 Jan 1; 8 (8): e71335.
ObjectivesUrokinase-type plasminogen activator receptor is a multifunctional glycoprotein, the expression of which is increased during inflammation. It is known to bind to β3-integrins, which are elementary for the cellular entry of hantaviruses. Plasma soluble form of the receptor (suPAR) levels were evaluated as a predictor of severe Puumala hantavirus (PUUV) infection and as a possible factor involved in the pathogenesis of the disease.DesignA single-centre prospective cohort study.Subjects And MethodsPlasma suPAR levels were measured twice during the acute phase and once during the convalescence in 97 patients with serologically confirmed acute PUUV infection using a commercial enzyme-linked immunosorbent assay (ELISA).ResultsThe plasma suPAR levels were significantly higher during the acute phase compared to the control values after the hospitalization (median 8.7 ng/ml, range 4.0-18.2 ng/ml vs. median 4.7 ng/ml, range 2.4-12.2 ng/ml, P<0.001). The maximum suPAR levels correlated with several variables reflecting the severity of the disease. There was a positive correlation with maximum leukocyte count (r = 0.475, p<0.001), maximum plasma creatinine concentration (r = 0.378, p<0.001), change in weight during the hospitalization (r = 0.406, p<0.001) and the length of hospitalization (r = 0.325, p = 0.001), and an inverse correlation with minimum platelet count (r = -0.325, p = 0.001) and minimum hematocrit (r = -0.369, p<0.001).ConclusionPlasma suPAR values are markedly increased during acute PUUV infection and associate with the severity of the disease. The overexpression of suPAR possibly activates β3-integrin in PUUV infection, and thus might be involved in the pathogenesis of the disease.
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