Abstract
Purpose
The purpose of this study was to evaluate the effects of mitochondrial supplementation (MS) on early embryonic development and to assess the safety of MS treatments using induced pluripotent stem cells (iPSCs) as the mitochondrial donor.
Methods
In this study, we evaluated the effect of MS on early embryonic development using induced pluripotent stem cells (iPSCs) as the donor. Mouse zygotes were injected with either mitochondria from iPSCs or a vehicle solution. Several parameters were evaluated, including the rates of blastocyst formation and implantation, the weight of E13.5 embryos and placentas, the distribution of the donor mitochondrial DNA (mtDNA), and the pattern of methylation in the differentially methylated regions (DMRs) of the H19 and Snrpn genes.
Results
We found that neither the rates of blastocyst formation and implantation nor the weights of E13.5 embryos and placentas were significantly different between the MS and control groups. Additionally, the mtDNA from the iPSC donors could be detected in the muscle tissue of four fetuses and all placentas in the MS group. Finally, the methylation patterns of H19 and Snrpn DMRs remained unchanged by MS.
Conclusions
iPSC-derived mtDNA was directly involved in the process of embryonic development after MS. No adverse effects were seen when using iPSCs as a mitochondrial donor, but it remains to be seen whether this method can improve embryonic development, especially in older mice.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 81370680, 81402168, and 31571497), the Specialized Research Fund for the Doctoral Program of the Chinese Ministry of Education (Grant No. 20130171130009), and the Natural Science Foundation’s Key Research Project of Guangdong Province (Grant No. 2013020012660).
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Contributions
Ruiqi Li analyzed the data and drafted the manuscript. Bingqiang Wen induced iPSCs and evaluated the pluripotency of iPSCs. Haijing Zhao also drafted the manuscript. Nengyong Ouyang, Songbang O, and Meiqi Mai collected the data. Wenjun Wang revised the manuscript. Jianyong Han and Dongzi Yang conceived and designed the study. All authors interpreted the data.
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The authors declare that they have no competing interests.
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All animal protocols were approved by and performed in accordance with the requirements of the Institutional Animal Care and Use Committee at the authors’ university.
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Supplementary Figure 1
The pluripotency detection of iPSCs. A) AP test; B) three germ layersof the teratoma; C) immunostaining of OCT4 and SOX2. (JPEG 8614 kb)
Supplementary Figure 2
Mitochondria ultrastructure and morphology of iPSCs. IPSCs mitochondria were immature, with round or oval shapes, possess few cristae and have an electron dense matrix. Mitochondria (arrow), nucleus (*) (12000×).. (JPEG 15112 kb)
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Li, R., Wen, B., Zhao, H. et al. Embryo development after mitochondrial supplementation from induced pluripotent stem cells. J Assist Reprod Genet 34, 1027–1033 (2017). https://doi.org/10.1007/s10815-017-0948-9
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DOI: https://doi.org/10.1007/s10815-017-0948-9