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The antioxidant capacity of Mito-TEMPO improves the preimplantation development and viability of vitrified-warmed blastocysts through the stabilization of F-actin morphological aspects in bovine embryos

  • Jae-Hoon, Jeong (Department of Biotechnology, College of Engineering, Daegu University) ;
  • Hyo-Jin, Park (Department of Biotechnology, College of Engineering, Daegu University) ;
  • Seul-Gi, Yang (Department of Biotechnology, College of Engineering, Daegu University) ;
  • Deog-Bon, Koo (Department of Biotechnology, College of Engineering, Daegu University)
  • 투고 : 2022.11.13
  • 심사 : 2022.11.29
  • 발행 : 2022.12.31

초록

Reactive oxygen species (ROS) production and F-actin cytoskeleton dynamics play important roles in the survival rate of blastocysts after the vitrified-warming process. However, the protective effects of Mito-TEMPO against cryo-injury and viability through F-actin aggregation and mitochondrial-specific ROS production in vitrificated-warmed bovine embryos have not been investigated. The aims of the present study were to: (1) determine the effects of Mito-TEMPO on embryonic developmental competence and quality by F-actin stabilization during in vitro culturing (IVC), and (2) confirm the effects of Mito-TEMPO through F-actin structure on the cryotolerance of vitrification-warming in Mito-TEMPO exposed in vitro production (IVP) of bovine blastocysts. Bovine zygotes were cultured with 0.1 μM Mito-TEMPO treatment for 2 days of IVC. Mito-TEMPO (0.1 μM) exposed bovine embryos slightly improved in blastocyst developmental rates compared to the non-treated group. Moreover, the viability of vitrified-warmed blastocysts from Mito-TEMPO treated embryos significantly increased (p < 0.05, non-treated group: 66.7 ± 3.2% vs Mito-TEMPO treated group: 79.2 ± 5.9%; re-expanded at 24 hours). Mito-TEMPO exposed embryos strengthened the F-actin structure and arrangement in the blastocyst after vitrification-warming. Furthermore, the addition of Mito-TEMPO into the IVC medium enhanced embryonic survival and quality through F-actin stabilization after the vitrification-warming procedure. Overall, our results suggest that supplementing the culture with 0.1 μM Mito-TEMPO improves the embryonic quality and cryo-survival of IVP bovine blastocysts.

키워드

과제정보

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF-2021R1C1C2009469, NRF-2022R1A2C1002800, and NRF-2021R1A6A3A01087623) funded by and the Ministry of Science and ICT, Republic of Korea.

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