Nasal mucosal microRNA expression in children with respiratory syncytial virus infection

BMC Infectious Diseases

Research Article

Hans O Fjærli¹  Tonje Sonerud²  Christopher S Inchley³  Britt Nakstad³ 

[1] Department of Pediatric and Adolescent Medicine, Akershus University Hospital, 1478, Lørenskog, Norway;Department of Pediatric and Adolescent Medicine, Akershus University Hospital, 1478, Lørenskog, Norway;Department of Clinical Molecular Biology and Laboratory Sciences (EpiGen), Akershus University Hospital, 1478, Lørenskog, Norway;Department of Pediatric and Adolescent Medicine, Akershus University Hospital, 1478, Lørenskog, Norway;Institute of Clinical Medicine, University of Oslo, 0316, Oslo, Norway;

关键词: Respiratory syncytial virus;    MicroRNA;    miR-34;    miR-125;    miR-429;    miR-155;    Bronchiolitis;    Children;    Pediatric;    Nasal mucosa;   

DOI  :  10.1186/s12879-015-0878-z

 received in 2014-10-17, accepted in 2015-03-10,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundRespiratory syncytial virus (RSV) infection is a common cause of pediatric hospitalization. microRNA, key regulators of the immune system, have not previously been investigated in respiratory specimens during viral infection. We investigated microRNA expression in the nasal mucosa of 42 RSV-positive infants, also comparing microRNA expression between disease severity subgroups.MethodsNasal mucosa cytology specimens were collected from RSV-positive infants and healthy controls. 32 microRNA were selected by microarray for qPCR verification in 19 control, 16 mild, 7 moderate and 19 severe disease samples.ResultsCompared to healthy controls, RSV-positive infants downregulated miR-34b, miR-34c, miR-125b, miR-29c, mir125a, miR-429 and miR-27b and upregulated miR-155, miR-31, miR-203a, miR-16 and let-7d. On disease subgroups analysis, miR-125a and miR-429 were downregulated in mild disease (p = 0.03 and 0.02, respectively), but not in severe disease (p = 0.3 and 0.3).ConclusionmicroRNA expression in nasal epithelium cytology brushings of RSV-positive infants shows a distinct profile of immune-associated miRNA. miR-125a has important functions within NF-κB signaling and macrophage function. The lack of downregulation of miR-125a and miR-429 in severe disease may help explain differences in disease manifestations on infection with RSV.

【 授权许可】

CC BY   
© Inchley et al.; licensee BioMed Central. 2015