Abstract Objective: This study aimed to examine changes in miRNAs expression profile of COPD patients. Methods: Thirty-six COPD patients as well as thirty-three healthy volunteers were recruited. Total RNAs were collected from the plasma of each participant. The differentially expressed miRNAs in COPD were screened from the GEO database. RT-qPCR was carried out to detect miRNA expression. Results: In total, 9 out of 55 miRNAs were expressed differentially in COPD patients. Confirmed by RT-qPCR validation, 6 miRNAs increased while 3 miRNAs decreased. Further analysis of miR-423-5p, which has not been reported in COPD, showed that AUC for the diagnosis of COPD was 0.9651, and miR-423-5p levels was inversely correlated with the duration of smoking. Conclusion: The present study demonstrates that miR-423-5p is a potential marker for identifying COPD patients.

Resumo Objetivos: A finalidade de nosso estudo foi avaliar a validade preditiva dos escores PELOD-2 no dia 1 e "quick" PELOD-2 no dia 1 com relação à mortalidade hospitalar em crianças com sepse em uma UTIP de um país em desenvolvimento. Métodos: Foram analisados retrospectivamente os dados de 516 crianças diagnosticadas com sepse. As crianças foram divididas em grupo sobrevida e grupo não sobrevida de acordo com o desfecho clínico de 28 dias após internação. Foram coletadas e pontuadas as variáveis PELOD-2 no dia 1, qPELOD-2 no dia 1, pediatric Sequential Organ Failure Assessment (pSOFA) e Pediatric Multiple Organ Dysfunction Score (P-MODS). A curva da característica de operação do receptor (ROC) foi plotada e a eficiência preditiva do PELOD-2 no dia 1, o escore qPELOD-2 no dia 1, pSOFA, P-MODS com relação a óbito foram avaliados pela área abaixo da curva (AUC) da curva ROC. Resultados: O escore PELOD-2 no dia 1, escore qPELOD-2 no dia 1, pSOFA e P-MODS no grupo não sobrevida foram significativamente maiores do que os no grupo sobrevida. A análise preditiva da curva ROC mostrou que as AUCs do escore PELOD-2 no dia 1, escore qPELOD-2 no dia 1, pSOFA e P-MODS com relação ao prognóstico de crianças com sepse na UTIP foi 0,916, 0,802, 0,937 e 0,761, respectivamente (todas p < 0,05). Conclusões: Tanto o escore PELOD-2 no dia 1 e o escore qPELOD-2 no dia 1 foram válidos e conseguiram avaliar o prognóstico de crianças com sepse em uma UTIP de um país em desenvolvimento. Além disso, o escore PELOD-2 no dia 1 foi superior ao escore qPELOD-2 no dia 1. São necessários estudos adicionais para verificar a utilidade do escore qPELOD-2 no dia 1, principalmente fora da UTIP.

Abstract Objectives: This study aimed to evaluate the predictive validity of the day-1 PELOD-2 and day-1 "quick" PELOD-2 (qPELOD-2) scores for in-hospital mortality in children with sepsis in a pediatric intensive care unit (PICU) of a developing country. Methods: The data of 516 children diagnosed as sepsis were retrospectively analyzed. The children were divided into survival group and non-survival group, according to the clinical outcome 28 days after admission. Day-1 PELOD-2, day-1 qPELOD-2, pediatric SOFA (pSOFA), and P-MODS were collected and scored. Receiver operating characteristic (ROC) curves were plotted, and the efficiency of the day-1 PELOD-2, day-1 qPELOD-2 score, pSOFA, and P-MODS for predicting death were evaluated by the area under the ROC curve (AUC). Results: The day-1 PELOD-2 score, day-1 qPELOD-2 score, pSOFA, and P-MODS in the non-survivor group were significantly higher than those in the survivor group. ROC curve analysis showed that the AUCs of the day-1 PELOD-2 score, day-1 qPELOD-2 score, pSOFA, and P-MODS for predicting the prognosis of children with sepsis in the PICU were 0.916, 0.802, 0.937, and 0.761, respectively (all p < 0.05). Conclusions: Both the day-1 PELOD-2 score and day-1 qPELOD-2 score were effective and able to assess the prognosis of children with sepsis in a PICU of a developing country. Additionally, the day-1 PELOD-2 score was superior to the day-1 qPELOD-2 score. Further studies are needed to verify the usefulness of the day-1 qPELOD-2 score, particularly outside of the PICU.