Divergent intracellular pathways regulate interleukin-1beta-induced miR-146a and miR-146b expression and chemokine release in human alveolar epithelial cells.
We have previously reported that IL-beta-induced miR-146a and miR-146b expression negatively regulates IL-8 and RANTES release in human alveolar A549 epithelial cells. To determine the intracellular pathways that regulate this response, we demonstrate IL-1beta-induced activation of the nuclear factor (NF)-kappaB, extracellular regulated kinase (ERK)-1/2, c-jun N-terminal kinase (JNK)-1/2 and p38 mitogen activated kinase (MAP) kinase pathways. Subsequent pharmacological studies show that IL-1beta-induced miR-146a, IL-8 and RANTES production was regulated via NF-kappaB and JNK-1/2 whilst miR-146b expression was mediated via MEK-1/2 and JNK-1/2. These divergent intracellular pathways likely explain the differential expression and biological action of the miR-146 isoforms.
Airways Disease, National Heart and Lung Institute, Imperial College, London SW3 6LY, UK.
Mark M
MM
Perry
Andrew E
AE
Williams
Eleni
E
Tsitsiou
Hanna M
HM
Larner-Svensson
Mark A
MA
Lindsay
D018946:Chemokine CCL5 / Q000378:metabolism*; D004789:Enzyme Activation; D004791:Enzyme Inhibitors / Q000378:metabolism; D004847:Epithelial Cells / Q000166:cytology / Q000378:metabolism*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000235:genetics / Q000378:metabolism; D006801:Humans; D053583:Interleukin-1beta / Q000235:genetics / Q000378:metabolism; D016209:Interleukin-8 / Q000378:metabolism*; D048369:MAP Kinase Kinase 1 / Q000235:genetics / Q000378:metabolism; D048370:MAP Kinase Kinase 2 / Q000235:genetics / Q000378:metabolism; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism*; D048055:Mitogen-Activated Protein Kinase 8 / Q000235:genetics / Q000378:metabolism; D048056:Mitogen-Activated Protein Kinase 9 / Q000235:genetics / Q000378:metabolism; D016328:NF-kappa B / Q000235:genetics / Q000378:metabolism; D011650:Pulmonary Alveoli / Q000166:cytology; D020545:Respiratory Mucosa / Q000166:cytology* / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology*; D048051:p38 Mitogen-Activated Protein Kinases / Q000235:genetics / Q000378:metabolism
D018946:Chemokine CCL5; D004791:Enzyme Inhibitors; D053583:Interleukin-1beta; D016209:Interleukin-8; C542542:MIRN146 microRNA, human; D035683:MicroRNAs; D016328:NF-kappa B; D048056:Mitogen-Activated Protein Kinase 9; D048049:Extracellular Signal-Regulated MAP Kinases; D048055:Mitogen-Activated Protein Kinase 8; D048051:p38 Mitogen-Activated Protein Kinases; D048369:MAP Kinase Kinase 1; D048370:MAP Kinase Kinase 2