Abstract
Establishing new somatic cell cultures has raised significant attention as an effective and convenient way to preserve genetic samples for different applications. Although many lines have been established in model animals, none derived from six-banded armadillo species is currently available. We report the successful isolation and characterization of fibroblasts from six‐banded armadillos, evaluating the cell quality after extended culture and cryopreservation. Initially, we collected ear skin from five captive adult individuals and identified fibroblast lines by morphology, karyotyping, and immunophenotyping assays. The isolated fibroblasts were evaluated after several passages (fourth, seventh, and tenth passages) and cryopreservation by slow freezing. Cell morphology, viability, metabolism, proliferative activity, mitochondrial membrane potential, and apoptosis levels were analyzed. The skin explants had great adhesion, and cell outgrowth could be seen after 3–6 d. The cells were verified as fibroblasts at the fourth passage by vimentin expression and normal karyotype (2n = 58). The viability remained high (> 87%) and constant from the fourth to the tenth passage (p > 0.05). The passages did not change the cell morphology and metabolic and growth rates. Moreover, cryopreservation did not affect most evaluated parameters; post-thawed cells maintained their viability, growth, metabolism, and apoptosis levels. Nevertheless, cryopreservation increased mitochondrial membrane permeability and cell population doubling time compared to non-cryopreserved cells (p < 0.05). In summary, viable fibroblasts can be obtained from six-banded armadillo skin while conserving their quality as the number of passages increases and featuring few changes after cryopreservation.
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Acknowledgements
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES, Financial Code 001), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, no. 309078/2021-0), and Pró-Reitoria de Pesquisa e Pós-Graduação (PROPPG)/UFERSA (no. 35/2021). AR Silva, and AF Pereira were recipients of CNPq grants.
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Fernandes, D.P., Praxedes, É.A., da Silva Viana, J.V. et al. Long-term preservation of established fibroblast lines from six‐banded armadillos (Euphractus sexcintus, Linnaeus, 1758) by extended passage and cryopreservation. In Vitro Cell.Dev.Biol.-Animal 60, 266–277 (2024). https://doi.org/10.1007/s11626-024-00871-w
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DOI: https://doi.org/10.1007/s11626-024-00871-w