Gymnotic uptake of AntimiRs alter microRNA-34a levels in 2D and 3D epithelial cell culture
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Julie Weidner1, Ewa Kolosionek2, Reetta Holmila2
1Translational Science Experimental Medicine, Research & Early Development, Respiratory & Immunology, BioPharmaceutical R&D, AstraZeneca, 431 83 Mölndal, Sweden.
Abstract:
MicroRNAs are attractive therapeutic targets in many diseases, including chronic obstructive pulmonary disease and idiopathic pulmonary fibrosis. Among microRNA inhibitors antimiRs have been proven successful in lowering aberrant microRNA levels in the clinic. We present a set of antimiRs targeting miR-34a, which has been shown to be dysregulated in chronic lung diseases. The tool compounds were taken up by a bronchial epithelial cell line and primary human bronchial epithelial cells, followed by efficient knockdown of miR-34a. Similar results were observed in 3D differentiated primary human bronchial epithelial cells cultured at the air-liquid interface. Varying chemical properties of antimiRs had significant impact on cellular uptake and potency, resulting in effective tool compounds for use in lung-relevant cellular systems. This report demonstrates gymnotic antimiR uptake and activity in 3D epithelial cell culture after apical administration, mimicking inhalation conditions.
Insights
Researchers developed antimiRs targeting miR-34a to treat lung diseases like COPD. These compounds effectively reduced miR-34a in lung cells, even in 3D models simulating inhalation, showing promise for new therapies.
Area of Science:
- Biochemistry
- Molecular Biology
- Pulmonary Medicine
Background:
- MicroRNAs are implicated in chronic lung diseases such as COPD and idiopathic pulmonary fibrosis.
- AntimiRs are effective microRNA inhibitors used clinically to reduce aberrant microRNA levels.
Purpose of the Study:
- To develop and evaluate antimiRs targeting miR-34a for potential therapeutic applications in chronic lung diseases.
- To assess the cellular uptake and efficacy of antimiRs in various lung-relevant cell models.
Main Methods:
- Synthesis and characterization of antimiRs targeting miR-34a.
- Assessment of cellular uptake in bronchial epithelial cell lines and primary cells.
- Evaluation of miR-34a knockdown in 2D and 3D cell culture models (air-liquid interface).
- Apical administration to simulate inhalation conditions in 3D models.
Main Results:
- The developed antimiRs were efficiently taken up by bronchial epithelial cells.
- Effective knockdown of miR-34a was achieved in both 2D and 3D cell cultures.
- Chemical modifications of antimiRs influenced cellular uptake and potency.
- Demonstrated gymnotic antimiR uptake and activity in 3D models mimicking inhalation.
Conclusions:
- AntimiRs targeting miR-34a are effective tool compounds for lung-relevant cellular systems.
- Gymnotic uptake and activity in 3D models under simulated inhalation conditions show therapeutic potential.
- Further development of antimiRs could lead to novel treatments for chronic lung diseases.
