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Updated: Sep 15, 2025
Generation of Monoclonal Cultures from Wolbachia-infected Drosophila melanogaster JW18 Cell Line
Published on: June 27, 2025
Generation of Monoclonal Cultures from Wolbachia-infected Drosophila melanogaster JW18 Cell Line
Navina Mable Francis1, Ewa Chrostek2
1Institute of Environmental Sciences, Faculty of Biology, Jagiellonian University; Doctoral School of Exact and Natural Sciences, Jagiellonian University.
Abstract:
Cell lines are widely used models in biological research. They are particularly useful in studies of intracellular bacteria that cannot be efficiently propagated outside host organisms. Wolbachia, an intracellular symbiont of many invertebrates, induces strong reproductive and antiviral effects in its insect hosts. Wolbachia-infected insect cells have been widely used to study Wolbachia phenotypes. However, these cell lines often consist of mixed populations of cells with potentially varying phenotypes and responses to experimental treatments. In particular, cell lines with Wolbachia have been reported to exhibit variable growth rates and variable Wolbachia infection prevalence from one passage to the next. To remedy this, we generated monoclonal cell lines from the Wolbachia-infected Drosophila melanogaster-derived JW18 cell line. These clonal lines were established at different timepoints and show different Wolbachia infection statuses. This variability suggests that any treatment applied to a parental JW18 population could lead to the selection of sub-populations as opposed to influencing the physiology of the entire culture. Here, we present a protocol for generating single-cell clones and continuous clonal cultures from Wolbachia-infected insect cells, enabling more controlled and reproducible experiments.
Insights
Researchers developed a protocol to create single-cell clones from Wolbachia-infected insect cell lines. This method ensures consistent experimental conditions by preventing population variability in Wolbachia infections.
Area of Science:
- Microbiology
- Cell Biology
- Genetics
Background:
- Cell lines are vital models in biological research, especially for studying intracellular bacteria like Wolbachia.
- Wolbachia infections in insect cell lines can lead to variable phenotypes and infection prevalence, complicating research.
- Existing insect cell lines often comprise mixed cell populations, hindering reproducible experimental outcomes.
Purpose of the Study:
- To develop a method for generating monoclonal cell lines from Wolbachia-infected insect cells.
- To enable more controlled and reproducible experimental studies on Wolbachia phenotypes and host-pathogen interactions.
- To address the variability issues associated with mixed-population insect cell lines.
Main Methods:
- Generation of single-cell clones from the Wolbachia-infected Drosophila melanogaster JW18 cell line.
- Establishment of continuous clonal cultures from these single-cell clones.
- Characterization of clonal lines for their Wolbachia infection status and stability.
Main Results:
- Successfully generated monoclonal cell lines from the JW18 cell line.
- Demonstrated variability in Wolbachia infection status among different clonal lines.
- Highlighted the potential for selection of subpopulations in mixed parental cultures.
Conclusions:
- The developed protocol provides a reliable method for creating homogeneous, clonal insect cell lines for Wolbachia research.
- Monoclonal cell lines facilitate more precise investigations into Wolbachia's effects on host physiology and behavior.
- This approach enhances the reproducibility and accuracy of experiments involving Wolbachia-infected insect models.
