Medium and time conservation affect follicular morphology and superoxide dismutase enzyme activity of bovine preantral follicles during storage at 4ºC

Maiara Aline Gonçalves Ramos, Fabio Gallas Leivas, Daniele Missio, Francielli Weber Santos Cibin, Antônio Carlos Galarça Guimarães, Daniela dos Santos Brum


The aim of this study was to evaluate the morphology and superoxide dismutase enzyme (SOD) activity of bovine preantral follicles (PFs) preserved in TCM 199, saline solution or PBS at different conservation periods. Cow ovaries (n=6) were divided into 7 fragments. One small piece of each ovarian fragment was randomly removed to evaluate SOD activity, while the remainder was immediately fixed for morphological evaluation as a control group. The other 6 fragments were randomly distributed in tubes containing TCM 199, saline solution, or PBS and maintained at 4ºC for 6 or 24 h. For histological evaluation, the fragments were fixed in Carnoy and stained with PAS-hematoxylin, following being classified PFs in relation to their follicular morphology in normal or degenerated. Determination of SOD activity was based on the ability to inhibit autoxidation of adrenaline in adrenochrome. Evaluation of follicular morphology showed that follicles preserved in TCM 199 for 6 h did not differ from the control (P > 0.05). In contrast, preservation in saline solution and PBS for 6 or 24 h and TCM 199 for 24 h decreased normal PFs compared to the control (P < 0.05). SOD showed a lower activity in ovarian cortical tissue kept in TCM 199 for 6 h and saline solution for 24 h than in the other groups. Our study shows that incubation using TCM 199 at 4°C for 6 h can be used to efficiently conserve female bovine PFs in situ.


Ovary; Oxidative stress; Preservation.

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Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional