Abstract
With CRISPR/Cas (Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated) scientists working with Tribolium castaneum can now generate transgenic lines with site-specific insertions at their region of interest. We present two methods to generate in vivo imaging lines suitable for marking subsets of neurons with fluorescent proteins. The first method relies on homologous recombination and uses a 2A peptide to create a bicistronic mRNA. In such lines, the target and the marker proteins are not fused but produced at equal amounts. This work-intensive method is compared with creating gene-specific enhancer traps that do not rely on homologous recombination. These are faster to generate but reflect the expression of the target gene less precisely. Which method to choose, strongly depends on the aims of each research project and in turn impacts of how neural cells and their development are marked. We describe the necessary steps from designing constructs and guide RNAs to embryonic injection and making homozygous stocks.
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Acknowledgements
We express our gratitude to Prof. Martin Klingler for discussions on the gene-specific enhancer trap strategy and Dr. Stefan Dippel for discussions on the bicistronic line strategy. In addition, we want to thank Patricio Ferrer Murguia for useful additional information.
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Farnworth, M.S., Eckermann, K.N., Ahmed, H.M.M., Mühlen, D.S., He, B., Bucher, G. (2020). The Red Flour Beetle as Model for Comparative Neural Development: Genome Editing to Mark Neural Cells in Tribolium Brain Development. In: Sprecher, S. (eds) Brain Development. Methods in Molecular Biology, vol 2047. Humana, New York, NY. https://doi.org/10.1007/978-1-4939-9732-9_11
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DOI: https://doi.org/10.1007/978-1-4939-9732-9_11
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