So, you want to create a frog cell line? A guide to establishing frog skin cell lines from tissue explants
2022
Bui-Marinos, Maxwell P. | Todd, Lauren A. | Douglas, Alexander J. | Katzenback, Barbara A.
Skin is an important interface with the external environment and investigating amphibian skin cell biology will improve our understanding of how environmental factors such as pathogens and pollutants are contributing to global amphibian declines. There is a critical need for in vitro systems to facilitate conservation research in model and non-model amphibians and the creation of new amphibian cell lines will play a significant role in reducing or even replacing the use of live animals for in vivo studies by providing an in vitro alternative. Here, we detail an adapted protocol for the generation of spontaneously arising cell lines from frog skin tissues, without the need for immortalization steps. Expanding the amphibian invitrome will foster and expedite new research in amphibian gene function, cellular responses, host-pathogen interactions, and toxicology. The following customizations to traditional tissue explant generation procedures have facilitated the successful generation of adherent skin epithelial-like cell lines from Xenopus laevis and can be further adapted for use with different frog species, such as Rana sylvatica, and different tissues:•Osmotic adjustment of culture medium and solutions for different amphibian species.•Use of small tissue explants, instead of enzymatic digestion of tissues, and gentle spotting of these tissue explants onto the growth surface of tissue culture flasks to promote better tissue adherence.•Partial replacement of medium to allow accumulation of potential endogenous growth factors in cultures.
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