Peroxisome proliferator-activated receptor delta-PPARδ agonist (L-165041) enhances bovine embryo survival and post vitrification viability
2022
Sánchez Viafara, Jesús Alfonso | de Vasconcelos, Gisvani Lopes | Maculan, Renata | Alves, Nadja Gomes | Ferreira, Marcos Brandao Dias | Sudano, Mateus José | Mingoti, Gisele Zoccal | Nunes, Giovana Barros | de Lima, Renato Ribeiro | Drumond, Roberti Martins | dos Santos, Raphael Nunes | Eberlin, Marcos Nogueira | Negrão, Fernanda | Jasmin | Donato, Mariana Aragão M. | Peixoto, Christina A. | Camisão de Souza, José
The effect of L-165041 (PPARδ-agonist) on decreasing apoptosis and intracellular lipid content was assessed in fresh and vitrified–warmed in vitro -produced bovine embryos. It was hypothesised that the addition of L-165041 to the culture medium enhances development and cryopreservation. Oocytes were allocated to one of two treatments: control-standard culture medium, or L-165041 added to the medium on day1 with no media change. Ultrastructure, cleavage, and blastocyst rates were evaluated in fresh, and in post-vitrification cultured embryos by optical and electronic microscopy. A subset of fresh embryos were fixed for TUNEL assay and for Sudan-Black-B histochemical staining. Vitrified–warmed embryos were assessed using MALDI-MS technique. Cleavage and blastocyst rates (control 49.4±5.2, L-165041 51.8±4.3) were not influenced by L-165041. The proportion of inner cell mass cells (ICM) was higher in fresh embryos, and the rate of total and ICM apoptosis was lower in L-165041. In warmed-embryos, total and ICM apoptosis was lower in L-165041. The overall hatching rate was higher in L-165041 (66.62±2.83% vs 53.19±2.90%). There was less lipid accumulation in fresh L-165041-embryos. In conclusion, the use of L-165041 is recommended to improve the viability of in vitro -derived bovine embryos.
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