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Lung epithelial cells resist influenza A infection by inducing the expression of cytochrome VI C oxidase that is regulated by hsa-miR-4276.

Authors
Othumpangat-S; Noti-J; Beezhold-D
Source
FASEB J 2014 Apr; 28(1)(Suppl):1138.4
NIOSHTIC No.
20044719
Abstract
MicroRNAs regulate at least one third of all human genes and are phylogenetically well conserved. Influenza A virus infection induces several changes in host miRNA/protein profile and understanding the regulatory mechanism is essential for developing intervention approaches. In humans, mitochondrial energy metabolism involves mitochondrial respiration, electron transport and oxidative phosphorylation. Dysregulation of these processes has major pathological consequence and studies have shown that cytochrome oxidases are altered during viral infections. In these studies, influenza A infection of both human alveolar epithelial cells and human bronchial epithelial cells resulted in a significant down-regulation of hsa-miRNA-4276 (miRNA-4276). Influenza infection also triggered the overexpression of cytochrome oxidase VI C (COX6C). Transfection of epithelial cells with miRNA-4276 mimic reduced COX6C mRNA and protein expression. Similarly, epithelial cells transfected with miRNA4276 inhibitor increased COX6C mRNA and protein expression. Finally, transfection of cells with miRNA4276 inhibitor and subsequent infection with influenza A led to reduced influenza viral copy number. Taken together the data suggests that miRNA4276 is involved in the regulation of COX6C and that COX6C plays a role in resisting influenza A survival and propagation in lung epithelial cells. Thus, miRNA-4276 may be an important target in controlling the early stage infection of influenza A.
Keywords
Ribonucleic-acids; Genes; Viral-diseases; Viral-infections; Respiratory-system-disorders; Respiratory-infections; Lung-cells; Cell-cultures; Cell-function; Cellular-reactions; Proteins; Host-resistance; Cell-metabolism; Cellular-transport-mechanism; Oxidative-phosphorylation; Cytopathology; Cell-alteration; Alveolar-cells; Cellular-respiration; Energy-metabolism; Humans
CODEN
FAJOEC
Publication Date
20140401
Document Type
Abstract
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M072014
Issue of Publication
1
ISSN
0892-6638
NIOSH Division
HELD
Priority Area
Healthcare and Social Assistance
Source Name
The FASEB Journal
State
WV
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