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Li W, Cheng K, Zhang Y, et al. No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouse. J Anim Sci Biotechnol. 2015;6(1):42doi: 10.1186/s40104-015-0041-0.
Li, W., Cheng, K., Zhang, Y., Meng, Q., Zhu, S., & Zhou, G. (2015). No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouse. Journal of animal science and biotechnology, 6(1), 42. https://doi.org/10.1186/s40104-015-0041-0
Li, Wei, et al. "No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouse." Journal of animal science and biotechnology vol. 6,1 (2015): 42. doi: https://doi.org/10.1186/s40104-015-0041-0
Li W, Cheng K, Zhang Y, Meng Q, Zhu S, Zhou G. No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouse. J Anim Sci Biotechnol. 2015 Sep 14;6(1):42. doi: 10.1186/s40104-015-0041-0. eCollection 2015. PMID: 26380081; PMCID: PMC4568589.
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J Anim Sci Biotechnol. 2015 Sep 14;6(1):42. doi: 10.1186/s40104-015-0041-0. eCollection 2015.

No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouse.

Journal of animal science and biotechnology

Wei Li, Keren Cheng, Yue Zhang, Qinggang Meng, Shi'en Zhu, Guangbin Zhou

Affiliations

  1. Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University (Chengdu Campus), Wenjiang, 611130 P.R. China ; Institute of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 P.R. China.
  2. Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah USA.
  3. Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University (Chengdu Campus), Wenjiang, 611130 P.R. China.
  4. Nanjing Biomedical Research Institute of Nanjing University, Nanjing, 210089 P.R. China.

PMID: 26380081 PMCID: PMC4568589 DOI: 10.1186/s40104-015-0041-0

Abstract

BACKGROUND: This study was conducted to investigate effect of exogenous melatonin on the development of mouse mature oocytes after cryopreservation.

RESULTS: First, mouse metaphase II (MII) oocytes were vitrified in the open-pulled straws (OPS). After warming, they were cultured for 1 h in M2 medium containing melatonin at different concentrations (0, 10(-9), 10(-7), 10(-5), 10(-3) mol/L). Then the oocytes were used to detect reactive oxygen species (ROS) and glutathione (GSH) levels (fluorescence microscopy), and the developmental potential after parthenogenetic activation. The experimental results showed that the ROS level and cleavage rate in 10(-3) mol/L melatonin group was significantly lower than that in melatonin-free group (control). The GSH levels and blastocyst rates in all melatonin-treated groups were similar to that in control. Based on the above results, we detected the expression of gene Hsp90aa1, Hsf1, Hspa1b, Nrf2 and Bcl-x1 with qRT-PCR in oocytes treated with 10(-7), or 10(-3) mol/L melatonin and untreated control. After warming and culture for 1 h, the oocytes showed higher Hsp90aa1 expression in 10(-7) mol/L melatonin-treated group than in the control (P < 0.05); the Hsf1, Hsp90aa1 and Bcl-x1 expression were significantly decreased in 10(-3) mol/L melatonin-treated group when compared to the control. Based on the above results and previous research, we detected the development of vitrified-warmed oocytes treated with either 10(-7) or 0 mol/L melatonin by in vitro fertilization. No difference was observed between them.

CONCLUSIONS: Our results indicate that the supplementation of melatonin (10(-9) to 10(-3) mol/L) in culture medium and incubation for 1 h did not improve the subsequent developmental potential of vitrified-warmed mouse MII oocytes, even if there were alteration in gene expression.

Keywords: Gene expression; Melationin; Mouse oocyte; Parthenogenetic activation; vitrificantion

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