Mitochondrial DNA in Day 3 embryo culture medium is a novel, non-invasive biomarker of blastocyst potential and implantation outcome

S. Stigliani, L. Persico, C. Lagazio, P. Anserini, P. L. Venturini, P. Scaruffi

Research output: Contribution to journalArticlepeer-review

Abstract

In assisted reproduction technology, embryo competence is routinely evaluated on morphological criteria. Over the last decade, efforts in improving non-invasive embryo assessment have looked into the secretome of embryos. Human embryos release genomic DNA (gDNA) and mitochondrial DNA (mtDNA) into the culture medium, and the mtDNA/gDNA ratio is significantly correlated with embryo fragmentation. Here, we investigate whether mtDNA/gDNA ratio in embryo spent medium is correlated with blastulation potential and implantation. The mtDNA/gDNA ratio was assessed in 699 Day 3 culture media by quantitative polymerase chain reaction (qPCR) to investigate its correlation with embryo morphology, blastocyst development and implantation. A logistic regression model evaluated whether mtDNA/ gDNA ratio in the secretome may improve the prediction of blastulation.We found that embryos that successfully developed into blastocysts exhibited a significantly higher mtDNA/gDNA ratio in the culture medium compared with those that arrest (P = 0.0251), and mtDNA/gDNA, combined with morphological grading, has the potential to predict blastulation better than morphology alone (P = 0.02). Moreover, mtDNA/ gDNA ratio was higher in the media from good-quality embryos that reached the full blastocyst stage on Day 5 compared with those that developed more slowly (P <0.0001).With respect to blastocyst morphology, higher trophectoderm quality was associated with a higher mtDNA/ gDNA ratio in the culture medium. Finally, a high mtDNA/gDNA ratio in spent medium was associated with successful implantation outcome (P = 0.0452) of good-quality embryos. In summary, themtDNA/gDNAratio in the Day3 embryo secretome, in combination with morphological grading, may be a novel, non-invasive, early biomarker to improve identification of viable embryos with high developmental potential.

Original languageEnglish
Pages (from-to)1238-1246
Number of pages9
JournalMolecular Human Reproduction
Volume20
Issue number12
DOIs
Publication statusPublished - Dec 1 2014

Keywords

  • Blastocyst
  • Cell-free DNA
  • Human embryos
  • Implantation
  • mtDNA

ASJC Scopus subject areas

  • Obstetrics and Gynaecology
  • Reproductive Medicine
  • Developmental Biology
  • Genetics
  • Cell Biology
  • Embryology
  • Molecular Biology
  • Medicine(all)

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