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Immunoproteasome in the Plasma of Pediatric Patients With Moderate and Major Burns, and Its Correlation With Proteasome and UCHL1 Measured by SPR Imaging Biosensors.

The aim of this study was to determine the immunoproteasome concentration in blood plasma of pediatric patients with moderate and major burns and its correlation with circulating proteasome and ubiquitin carboxyl-terminal hydrolase L1 (UCHL1) with surface plasmon resonance imaging biosensor. The study population comprised of 30 patients with moderate (n = 21) and severe burns (n = 9), aged 9 months to 14 years. The control group represented 18 healthy, age-matched patients, admitted for herniotomy. Exclusion criteria were as follows: admission to the hospital later than 6 hours after burn, cardiovascular or immunological diseases, and severe preexisting infections. Mean concentrations of immunoproteasome, 20S proteasome, and UCHL1 in the blood plasma of children with burns-4 to 6 hours, 12 hours, 3 days, 5 days, and 7 days after thermal injury-were above the levels measured in controls. The immunoproteasome, 20S proteasome, and UCHL1 concentrations in the blood plasma of their patients were highest 12 hours after burn, slowly decreased over time, and on the 5th day still were higher than in controls (P < .05). There was a strong correlation between immunoproteasome and 20S proteasome concentrations 6 hours and 5 days after burn, and moderate correlation 12 hours after burn (P < .05). The immunoproteasome concentration is elevated after burn injury and slowly reaches the normal range during the wound healing process. There is strong correlation between immunoproteasome and 20S proteasome concentrations in the serum of children with moderate and major burns. They did not find such correlation between immunoproteasome and UCHL1 concentrations. Immunoproteasome concentration do not correlate with age or sex.

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