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Flow Cytometric Isolation of Primary Murine Type II Alveolar Epithelial Cells for Functional and Molecular Studies
Published on: December 26, 2012
Lassa Virus Infection of Primary Human Airway Epithelial Cells
Helena Müller-Kräuter1, Sarah Katharina Fehling1, Lucie Sauerhering1
1Institute of Virology, Philipps University Marburg, Hans-Meerwein-Str. 2, 35043 Marburg, Germany.
Lassa mammarenavirus (LASV) replicates in human airway cells, shedding primarily from the apical surface. This study reveals insights into LASV respiratory infection and host responses, aiding future therapeutic development.
Area of Science:
- Virology
- Cell Biology
- Respiratory Medicine
Background:
- Lassa mammarenavirus (LASV) is a highly pathogenic arenavirus causing severe human infections.
- Human infections often result from exposure to virus aerosols from rodent reservoirs.
- Understanding LASV respiratory replication is crucial for disease control.
Purpose of the Study:
- To investigate LASV replication mechanisms in human airway epithelial cells (HAECs).
- To elucidate virus entry, release, and host responses in the respiratory tract.
Main Methods:
- Utilized differentiated primary human airway epithelial cells (HAECs) under air-liquid interface culture.
- Assessed LASV infection, replication, and release dynamics.
- Analyzed actin cytoskeleton integrity and type III interferon response.
Main Results:
- HAECs support productive LASV replication.
- LASV enters HAECs via apical and basolateral surfaces but releases progeny predominantly apically.
- Apical release suggests potential transmission via airway secretions.
- Basolateral release correlates with actin rearrangement and compromised barrier integrity.
- LASV infection induces a significant type III interferon response in HAECs.
Conclusions:
- Human airway epithelial cells are permissive to LASV, supporting productive replication and apical shedding.
- Apical shedding may facilitate respiratory transmission of LASV.
- LASV infection disrupts epithelial barrier function and elicits a type III interferon response.
- Understanding these mechanisms is key for developing targeted LASV therapeutics.
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