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C6/36 Aedes albopictus cells have a dysfunctional antiviral RNA interference response
Doug E Brackney1, Jaclyn C Scott, Fumihiko Sagawa
1Department of Pathology, University of New Mexico School of Medicine, Albuquerque, New Mexico, USA. dbrackney@salud.unm.edu
Plos Neglected Tropical Diseases
|November 5, 2010
Summary
The C6/36 mosquito cell line may not have a functional RNA interference (RNAi) pathway, hindering accurate studies of arbovirus interactions. This dysfunction impacts understanding mosquito antiviral defenses against viruses like West Nile virus (WNV).
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- Mosquitoes utilize RNA interference (RNAi) as a key antiviral defense mechanism.
- RNAi combined with invertebrate cell culture is crucial for studying virus-vector interactions.
- Previous studies questioned the RNAi response to West Nile virus (WNV) in C6/36 cells.
Purpose of the Study:
- To investigate whether WNV actively evades RNAi or if C6/36 cells possess a defective RNAi pathway.
- To characterize the small RNA profiles in response to arbovirus infection in different mosquito cell lines.
Main Methods:
- Infection of C6/36 and Drosophila melanogaster S2 cells with WNV, Sindbis virus (SINV), and La Crosse virus (LACV).
- Isolation of total RNA and construction of small RNA (sRNA) libraries.
- High-throughput sequencing of sRNA libraries to analyze virus-derived small interfering RNAs (viRNAs).
Main Results:
- S2 cells produced predominantly 21 nt viRNAs, characteristic of functional RNAi, for all tested viruses.
- C6/36 cells produced altered viRNA profiles: 17 nt for WNV and 26-27 nt for SINV and LACV.
- The origin and distribution of viRNAs in C6/36 cells differed significantly from S2 cells and previous studies.
Conclusions:
- C6/36 cells appear to lack a functional antiviral RNAi response.
- The observed sRNA profiles suggest a dysfunctional RNAi pathway in C6/36 cells.
- C6/36 cells may not be a suitable model for accurately studying mosquito-arbovirus interactions at the molecular level.
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