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BACKGROUND: The present research aimed to investigate the clinical value of plasma miR-190 in children with acute respiratory distress syndrome (ARDS) and the impact of miR-190 on LPS-induced ARDS cell models. METHODS: The plasma miR-190 levels were measured using real-time quantitative reverse transcription PCR (RT-qPCR). LPS-treated human pulmonary microvascular endothelial cells (HPMECs) were established and then transfected with miR-190 mimic, inhibitor, or miR-negative controls. The levels of inflammatory factors were detected by enzyme-linked immunosorbent assay (ELISA). The effects of miR-190 on HPMEC proliferation and apoptosis were evaluated by CCK-8 assay and flow cytometry. The regulation of KLF15 by miR-190 was detected by luciferase report assay. RESULTS: The plasma miR-190 expression was increased in ARDS children and it was positively related to the severity and 28 day-survival. Plasma miR-190 could distinguish ARDS children from healthy children. Inhibition of miR-190 increased LPS-induced HPMEC cell proliferation and decreased cell apoptosis and inflammatory cytokines IL-6, IL-1ß, and TNF-α. KLF15 was a direct target of miR-190. CONCLUSION: Increased plasma miR-190 may be a clinical diagnostic and prognostic predictor for ARDS children. Inhibition of miR-190 may improve LPS-induced ARDS by increasing cell proliferation, inhibiting cell apoptosis and inflammatory response by targeting KLF15.
RESUMEN
The present study attempted to analyze the clinical characteristics and pathogenesis of Kawasaki disease (KD) in children with hyperbilirubinemia.A total of 390 children with KD hospitalized in our hospital from September 2018 to July 2019 were selected and divided into control (270 cases) and hyperbilirubinemia (120 cases) groups based on the total, direct, and indirect bilirubin values after admission. Clinical data of the inflammatory index and fever process of the 2 groups were analyzed and compared.The difference in sex and age between the 2 groups was statistically nonsignificant (Pâ>â.05). In the hyperbilirubinemia group, the white blood cell count, C-reactive protein, hemoglobin, platelet count, erythrocyte sedimentation rate, alanine aminotransferase, aspartate aminotransferase, albumin, and routine urine leucocyte; and incidence of coronary artery expansion, heart injury, and unreactive gamma globulin treatment were higher than those in the control group and the differences were statistically significant (Pâ<â.05). In the hyperbilirubinemia group, the mean fever duration before admission was shorter than that in the control group, whereas the fever duration after gamma globulin treatment was longer than that in the control group; these differences were statistically significant (Pâ<â.05).Hyperbilirubinemia incidence in children with KD was approximately 30.77% (120 cases), of which increased direct bilirubin was observed in 70.83% (85 cases) and increased indirect bilirubin in 29.17% (35 cases). Children with KD combined with hyperbilirubinemia exhibited a strong inflammatory reaction, which may be due to liver damage or biliary block.