Unraveling the Association Between Genetic Integrity and Metabolic Activity in Pre-implantation Stage Embryos

D’Souza, Fiona and Uppangala, Shubhashree and Honguntikar, Sachin D and Salian, Sujith Raj and Kalthur, Guruprasad and Adiga, Satish Kumar (2016) Unraveling the Association Between Genetic Integrity and Metabolic Activity in Pre-implantation Stage Embryos. Scientific Reports, 6. p. 37291. ISSN 2045-2322

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Abstract

Early development of certain mammalian embryos is protected by complex checkpoint systems to maintain the genomic integrity. Several metabolic pathways are modulated in response to genetic insults in mammalian cells. The present study investigated the relationship between the genetic integrity, embryo metabolites and developmental competence in preimplantation stage mouse embryos with the aim to identify early biomarkers which can predict embryonic genetic integrity using spent medium profiling by NMR spectroscopy. Embryos carrying induced DNA lesions (IDL) developed normally for the first 2.5 days, but began to exhibit a developmental delay at embryonic day 3.5(E3.5) though they were morphologically indistinguishable from control embryos. Analysis of metabolites in the spent medium on E3.5 revealed a significant association between pyruvate, lactate, glucose,proline, lysine, alanine, valine, isoleucine and thymine and the extent of genetic instability observed in the embryos on E4.5. Further analysis revealed an association of apoptosis and micronuclei frequency with P53 and Bax transcripts in IDL embryos on the E4.5 owing to delayed induction of chromosome instability. We conclude that estimation of metabolites on E3.5 in spent medium may serve as a biomarker to predict the genetic integrity in pre-implantation stage embryos which opens up new avenues to improve outcomes in clinical IVF programs.

Item Type: Article
Subjects: Medicine > KMC Manipal > Obstetrics & Gynaecology
Depositing User: KMC Library
Date Deposited: 02 Dec 2016 08:53
Last Modified: 02 Dec 2016 08:53
URI: http://eprints.manipal.edu/id/eprint/147636

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