期刊
JOURNAL OF CELLULAR BIOCHEMISTRY
卷 120, 期 12, 页码 19691-19698出版社
WILEY
DOI: 10.1002/jcb.29275
关键词
culture medium; microRNA; molecular biomarker; vitrification
资金
- Molecular and Cellular Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
microRNAs (miRNAs) play a critical role in implantation and development of mouse embryos. In this study, we aim to evaluate the possibility of miRNAs as potential biomarkers in the blastocyst culture to assess embryo quality. We also intend to investigate whether improved clinical outcomes of vitrified embryos agree with altered miRNA expressions. Mouse embryos from in vitro fertilization were vitrified at the two-cell stage. After thawing, the embryos were individually cultured and developed to the blastocyst stage. We used quantitative real-time polymerase chain reaction to evaluate miRNA expression levels in both vitrified and fresh groups, and culture medium (CM). The fibronectin binding assay was performed to examine for blastocyst attachment. The findings showed reduced expressions of miR-16-1 (0.2 +/- 0.06) and miR-Let-7a (0.65 +/- 0.1) after vitrification compared to fresh embryos. We observed significant upregulation of the target genes Vav3 (4.33 +/- 0.25), integrin beta-3 (Itg beta 3; 4.73 +/- 0.2), and Bcl2 (2.29 +/- 0.16) in the vitrified embryos compared to the fresh groups. Evaluation of blastocyst CM showed upregulation of miR-Let-7a (15.68 +/- 0.89), miR-16-1 (16.18 +/- 0.75), and miR-15a (13.36 +/- 0.73) in the vitrified group in comparison to the fresh blastocysts (P < .05). The expression levels of miR-16-1 (3.28 +/- 0.63), miR-15a (5.91 +/- 0.38), and miR-Let-7a (9.07 +/- 0.6) in CM of the vitrified blastocysts conducted on fibronectin were significantly higher than the fresh group (P < .05).This study showed that vitrification of embryos changes implantation and proliferation biomarkers. In addition, upregulated miRNAs in CM could be potentially used for noninvasive early assessment of embryo quality.
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