MiRacles for babies with pulmonary hypoplasia: the effects of miR-10a and miR-200b on lung development

• Main Author: Visser, Robin
• Other Authors: Keijzer, Richard (Surgery)
• Published: 2016
• Subjects: congenital diaphragmatic hernia; lung development; miR-10a; miR-200b; pulmonary hypoplasia
• Online Access: http://hdl.handle.net/1993/31060

INTRODUCTION: Pulmonary hypoplasia causes high morbidity and mortality in congenital diaphragmatic hernia (CDH) patients. MiR-10a and miR-200b are overexpressed in human CDH lungs. We aimed to define their roles in lung development. METHODS: We profiled miR-10a expression with RT-qPCR and in situ hybridization using a nitrofen rat model for CDH. The effects of miR-10a on airway branching were evaluated in lung explants. MiR-200b’s role in airway branching was assessed in miR-200b knockout lung explants. Crossing miR-200b knockout mice with CFP-E-Cadherin was used to evaluate miR-200b’s effects on epithelial differentiation. RESULTS: Expression of miR-10a was altered in the nitrofen model and miR-10a mimics reversed lung hypoplasia in vitro. Heterozygous miR-200b lung explants displayed reduced airway branching. CFP-E-Cadherin/miR-200b knockout lung explants showed reduced epithelial expression. CONCLUSION: Both miR-10a and miR-200b are critical for lung development and CDH. Normalizing their expression may reverse lung hypoplasia and reduce the associated morbidity and mortality in CDH. === February 2016