Polydatin improves the developmental competence of bovine embryos in vitro via induction of sirtuin 1 (Sirt1)
Imran Khan A , Sung Woo Kim C , Kyung-Lim Lee A , Seok-Hwan Song A , Ayman Mesalam A , M. M. R. Chowdhury A , Zia Uddin D , Ki Hun Park B D and Il-Keun Kong A B E
+ Author Affiliations
- Author Affiliations
A Department of Animal Science, Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Republic of Korea.
B Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Gyeongnam Province, Republic of Korea.
C Animal Genetic Resources Research Center, National Institute of Animal Science, Rural Development Administration, Namwon 55717, Republic of Korea.
D Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Gyeongnam Province, Republic of Korea.
E Corresponding author. Email: ikong7900@gmail.com
Reproduction, Fertility and Development 29(10) 2011-2020 https://doi.org/10.1071/RD16302
Submitted: 4 August 2016 Accepted: 5 December 2016 Published: 14 February 2017
Abstract
The aim of the present study was to investigate the beneficial effect of polydatin (PD), the glycoside form of resveratrol, on embryo development in vitro. Oocytes were aspirated from ovaries of Korean Hanwoo cows and cultured until Day 8 in a humidified atmosphere of 5% CO2 in air at 38.5°C. Protein and gene expression levels were determined through confocal microscopy and reverse transcription–polymerase chain reaction respectively, whereas the number of total and apoptotic cells in Day 8 blastocysts was determined using Hoechst 33342 staining and terminal deoxyribonucleotidyl transferase-mediated dUTP–digoxigenin nick end-labelling. Of the different concentrations of PD (0.5, 1.0 and 2.0 µM) added to the IVM medium, only 1.0 µM PD significantly improved blastocyst development. Immunofluorescence analysis confirmed that protein levels of sirtuin 1 (Sirt1) increased significantly (P < 0.05) after PD treatment, whereas levels of reactive oxygen species (ROS) were significantly (P < 0.05) decreased, as evidenced by reductions in 8-oxoguanine immunoreactivity. Similarly, protein levels of nuclear factor (NF)-κB and cyclo-oxygenase (COX)-2 were significantly (P < 0.05) lower in the PD-treated group than in the control group. Treatment with 1.0 µM PD reduced gene expression of BCL2-associated X protein, inducible nitric oxide synthase, COX2 and Nfkb, but increased the expression of Sirt1, supporting the immunofluorescence data. PD possesses antioxidant activity and is useful for embryo development in vitro. We conclude that supplementation of IVM medium with PD improves embryo developmental competence via Sirt1.
Additional keywords: apoptosis, blastocyst, oocyte, oxidative stress.
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