Abstract
Traditional inflammatory biomarkers are insufficient for the evaluation of bronchiolitis severity. Recent investigations have shown that the receptor for advanced glycation end product (RAGE) and its soluble isoforms (sRAGE) play a critical role in the pathogenesis of lung injury. Main objective was to assess the serum levels of sRAGE of children with severe bronchiolitis admitted to the pediatric intensive care unit (PICU). Secondary objective was to study sRAGE correlation with the evolution and traditional biomarkers. Prospective, observational and descriptive study, 43 healthy controls and 37 patients (December 2011-February 2012) were enrolled. sRAGE levels were assessed and compared. In patients, the relation between sRAGE levels and clinical evolution, respiratory assistance, white blood cell count, absolute neutrophils count, serum C-reactive protein, and serum procalcitonin was analyzed. A statistical difference was found in the mean value of sRAGE at PICU admission between patients and controls (1,215.7 ± 535 vs 849 ± 579 pg/ml). Also a significant inverse correlation was found between sRAGE and the Wood-Downes Score at admission (p = 0.02). Serum sRAGE could be elevated in children with bronchiolitis. Larger clinical studies are necessary to elucidate its role as a bronchiolitis inflammatory and/or lung injury biomarker.
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