Abstract
Frozen animal tissues are thought to be appropriate for use as a donor for somatic cell nuclear transfer. This makes the freezing for long term storage a valuable tool for breeders needing to protect an animal population that is endangered by sanitary problems or for cryobanking of genetic resources. We report the successful cryopreservation of explants of skin derived from small biopsies from rabbit ear biopsies by using a protocol that can be easily performed by usual breeders, which are not equipped with cooling devices. By optimizing the procedure, we show that small biopsies can be kept at −20°C in a physiological solution containing 10% DMSO for up to 20 days before being deeply frozen in liquid nitrogen for long-term storage. After 10 days of storage at −20°C, the rate of viability of biopsies was similar to the control one (86 and 82% respectively). After 20 days of storage at −20°C, the rate of viability was dramatically lowered (39%), but it still allows to recover a significant population of viable cells from the preserved sample. Being appropriate to places lacking specific device, such a very simple technique may contribute to facilitate genome banking policies dedicated to the management of genetic resources in wild and domestic animals.
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Acknowledgments
This work was supported by a grant from Ministère des affaires étrangères (France), by University Mouloud Mammeri of Tizi Ouzou (Algeria), and by Institut National de la Recherche Agronomique (INRA) of Jouy en Josas. The authors wish to express their appreciation to Dr Nathalie Beaujean, Renaud Fleurot, Jean-Luc Servely, Etienne Laloy, Celeste and Daniel Le Bourhis for their kind help and Hamid Madiou for all statistical analysis.
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Benkeddache, D., Bodinier, P., Joly, T. et al. Recovery of viable cells from rabbit skin biopsies after storage at −20°C for up to 10 days. Cell Tissue Bank 13, 479–486 (2012). https://doi.org/10.1007/s10561-011-9280-2
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DOI: https://doi.org/10.1007/s10561-011-9280-2