A novel culture medium with reduced nutrient concentrations supports the development and viability of mouse embryos.

Scientific Reports
Alison F ErmischRebecca L Krisher

Abstract

Further refinement of culture media is needed to improve the quality of embryos generated in vitro. Previous results from our laboratory demonstrated that uptake of nutrients by the embryo is significantly less than what is supplied in traditional culture media. Our objective was to determine the impact of reduced nutrient concentrations in culture medium on mouse embryo development, metabolism, and quality as a possible platform for next generation medium formulation. Concentrations of carbohydrates, amino acids, and vitamins could be reduced by 50% with no detrimental effects, but blastocyst development was impaired at 25% of standard nutrient provision (reduced nutrient medium; RN). Addition of pyruvate and L-lactate (+PL) to RN at 50% of standard concentrations restored blastocyst development, hatching, and cell number. In addition, blastocysts produced in RN + PL contained more ICM cells and ATP than blastocysts cultured in our control (100% nutrient) medium; however, metabolic activity was altered. Similarly, embryos produced in the RN medium with elevated (50% control) concentrations of pyruvate and lactate in the first step medium and EAA and Glu in the second step medium were competent to implant and develop into fetus...Continue Reading

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Citations

Jul 3, 2021·Animals : an Open Access Journal From MDPI·Lorena Fernandez-GonzalezKatarina Jewgenow

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Methods Mentioned

BETA
Assay
PCR

Software Mentioned

MetaMorph
XCMS
KSOM
EmbryoViewer
R

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