Mitosure? Has anyone heard of this?
So we got our PGT-A results back and there’s a column on the end for MitoSure grades, which apparently are looking at potential for developmental delays? I’ve never heard of this, and couldn’t find it in a search of this group. I’ll comment below with the description from my report.
Posted Feb 23, 2023, 8:23 PM UTC
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ADDITIONAL INFORMATION Mitosure is based on peer reviewed research suggesting that blastocysts with euploid karyotype are less likely to implant if they contain abnormally high levels of mitochondrial DNA [1]. Progenesis' research [2] suggest that embryos with abnormally high content of mitochondria are more likely to have developmental delay. In this current report, we used mitosure score as a proxy for mitochondrial load. Mitochondrial load decreases overtime as the embryo develops. Our data suggest that in all age groups, the median mitosure score is 1.0. Approximately 7% of embryos have a score greater than 2.0. In this report, MitoSure score is broken into three tiers for simplicity (0.2-1, 1-2, above 2). All use of the MitoSure test results to select embryos is based on research and considered experimental. It is recommended that the clinic monitors the implantation and pregnancy rates for each transferred embryo with a given MitoSure score. [1] Fragouli E, Spath K, Alfarawati S, Kaper F, Craig A, et al. (2015) Altered Levels of Mitochondrial DNA Are Associated with Female Age, Aneuploidy, and Provide an Independent Measure of Embryonic Implantation Potential. PLoS Genet 11(6): e1005241. do:10.1371/journal. pgen. 1005241 [2] Ho JR, Arrach N, Rhodes-Long K, Salem W, McGinnis LK, Chung K, Bendikson KA, Paulson RJ, Ahmady A. (2018) Blastulation timing is associated with differential mitochondrial content in euploid embryos. J Assist Reprod Genet. 35(4):711-720. doi: 10.1007/10815-018-1113-9.
This is simultaneously super interesting and one more thing to add to the list of things to worry about