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Effect of ambient light exposure of media and embryos on development and quality of porcine parthenogenetically activated embryos

Published online by Cambridge University Press:  13 February 2014

Rong Li ,
Ying Liu ,
Hanne Skovsgaard Pedersen  and
Henrik Callesen
Rong Li*
Affiliation:
Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark
Ying Liu
Affiliation:
Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark
Hanne Skovsgaard Pedersen
Affiliation:
Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark
Henrik Callesen
Affiliation:
Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark
*
All correspondence to: Rong Li. Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark. Tel: +45 8715 4254. Fax: +45 8715 6000. e-mail: Rong.Li2@agrsci.dk
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Summary

Light exposure is a common stress factor during in vitro handling of oocytes and embryos that originates from both microscope and ambient light. In the current study, the effect of two types of ambient light (daylight and laboratory light) on porcine parthenogenetically activated (PA) embryos was tested in two experiments: (1) ambient light on medium subsequently used for embryo in vitro development; and (2) ambient light exposure on activated oocytes before in vitro development. The results from Experiment 1 showed that exposure of culture medium to both types of ambient light decreased the percentage of blastocysts that showed good morphology, only after 24 h exposure. The results from Experiment 2 revealed a reduction in both blastocyst formation and quality when activated oocytes were exposed to both types of ambient light. This effect was seen after only 1 h exposure and increased with time. In conclusion, exposure to ambient light can be harmful to embryo development, both when medium is exposed for a long period of time and, to a greater extent, when the embryo itself is exposed for >1 h. In practice, it is therefore recommended to protect both culture medium and porcine embryos against ambient light during in vitro handling in the laboratory.

Keywords

ApoptosisMedium stabilityParthenote embryosPig
Type
Research Article
Information
Zygote , Volume 23 , Issue 3 , June 2015 , pp. 378 - 383
Copyright
Copyright © Cambridge University Press 2014 

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