Zinc supplementation during in vitro maturation increases the production efficiency of cloned pigs

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  • JEON Yubyeol
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea Sooam Biotech Research Foundation, Guro-gu 08359, Seoul, Republic of Korea
  • YOON Junchul David
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • CAI Lian
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • HWANG Seon-Ung
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • KIM Eunhye
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • LEE Eunsong
    Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Kangwon, Republic of Korea
  • JEUNG Eui Bae
    Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • HYUN Sang-Hwan
    Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
  • HWANG Woo Suk
    Sooam Biotech Research Foundation, Guro-gu 08359, Seoul, Republic of Korea

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  • Zinc supplementation during <i>in vitro</i> maturation increases the production efficiency of cloned pigs

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<p> Zinc supplementation (0.8 µg/ml) in in vitro maturation (IVM) medium significantly enhances oocyte quality. In this study, we compared the development of somatic cell nuclear transfer (SCNT) embryos produced from conventional IVM (control) and zinc-supplemented IVM oocytes. A total of 1206 and 890 SCNT embryos were produced using control and zinc-supplemented oocytes, respectively, and then were transferred to 11 and 8 recipients, respectively. Five control recipients and three zinc-supplemented recipients became pregnant. Two live piglets and eight mummies were born from two control recipients, and ten live piglets and six stillborn piglets were born from three zinc-supplemented recipients. The production efficiency significantly increased in the zinc-supplemented group (0.33% vs. 3.02%). This report suggests that zinc supplementation in IVM medium improved the production efficiency of cloned pigs.</p>

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