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Year 2018 - Volume 38, Number 2
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Combination of ethylene glycol with sucrose increases survival rate after vitrification of somatic tissue of collared peccaries (Pecari tajacu Linnaeus, 1758), 38(2):350-356
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ABSTRACT.- Borges A.A., Queiroz Neta L.B., Santos M.V.O., Oliveira M.F., Silva A.R. & Pereira A.F. 2018. Combination of ethylene glycol with sucrose increases survival rate after vitrification of somatic tissue of collared peccary (Pecari tajacu Linnaeus, 1758). [Combinação de etilenoglicol com sacarose aumenta a taxa de sobrevivência após a vitrificação de tecido somático de catetos (Pecari tajacu Linnaeus, 1758). Pesquisa Veterinária Brasileira 38(2):350-356. Universidade Federal Rural do Semi-Árido, Universidade Federal Rural do Semi-Árido, BR-110 Km 47, Presidente Costa e Silva, Mossoró, RN 599625‑900, Brazil. E-mail: alexsandra.pereira@ufersa.edu.br
The cryopreservation of somatic tissue in collared peccaries promotes an alternative source of genetic material of this specie. The solid-surface vitrification (SSV) is a great option for tissue conservation; nevertheless, the optimization of SSV requirements is necessary, especially when referred to cryoprotectants that will compose the vitrification solution. Therefore, the aim was to evaluate the effect of the presence of 0.25 M sucrose in addition to different combinations (only or association) and concentrations (1.5 M or 3.0 M) of ethylene glycol (EG) and/or dimethyl sulfoxide (DMSO) in the somatic tissue vitrification of collared peccaries. Subsequently, we tested six combinations of cryoprotectants with or without sucrose in Dulbecco modified Eagle medium (DMEM) plus 10% fetal bovine serum (FBS). Thus, 3.0 M EG with sucrose was able to maintain normal tissue characteristics compared with non-vitrified (control), especially for the volumetric ratio of epidermis (61.2 vs. 58.7%) and dermis (34.5 vs. 36.6%), number of fibroblast (90.3 vs. 127.0), argyrophilic nucleolar organizer region (AgNOR) ratio (0.09 vs. 0.17%) and nucleus area (15.4 vs. 14.5 µm2) respectively. In conclusion, 3.0 M EG with 0.25 M sucrose and 10% FBS resulted in a better cryoprotectant composition in the SSV for somatic tissue of collared peccaries.
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