| Popis: |
BackgroundDengue presents a wide clinical spectrum including asymptomatic dengue fever (DF) or severe forms, such as dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS). Early symptoms of DHF are similar to those of non-life-threatening DF. Severe symptoms manifest after 3-5 days of fever, which can be life threatening due to lack of proper medications and inability to distinguish severe cases during the early stages. Early prediction of severe dengue in patients with no warning signs who may later develop severe infection is very important for proper disease management to alleviate DHF related complications and mortality. Due to the role in post-transcriptional regulation of gene expression and remarkable stability of microRNA, altered expression of microRNA was evaluated to explore clinically relevant biomarkers.Methodology/Principal findingsThe relative expression of microRNA hsa-let-7e, hsa-miR-30b-5p, hsa-miR-30e-3p, hsa-miR-33a, and hsa-miR-150-5p and several putative target genes in peripheral blood cells (PBC) collected from 20 DF and 20 DHF positive patients within four days from fever onset was evaluated by qRT-PCR. hsa-miR-150-5p showed significant (PConclusions/SignificanceDifferential expression of microRNA miR-150-5p and the putative target gene EZH2 may serve as reliable biomarkers of disease severity during early stages of dengue infection.Author summarySevere dengue cannot be distinguished from dengue fever during the early stages of infection based on the clinical symptoms. A diagnosis is only made after the patient is presented with severe manifestations such as plasma leakage and hemorrhage. During a dengue outbreak, this leads to high occupancy of hospital beds. However, only a small percentage of patients present with severe symptoms and the others do not require medical care at a hospital. Therefore, early prognosis of severe manifestations could reduce dengue related mortality by identifying the patients who will benefit from hospitalization and early intervention. We demonstrate that severe dengue in Sri Lankan patients is associated with increased expression of miRNA miR150 and decreased expression of EZH2 during the early stages of infection when none of the patients showed symptoms of developing severe manifestations at later stages of infection. |
