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- W2040232631 abstract "Mammalian pre-implantation development culminates in the formation of the blastocyst consisting of two distinct cell lineages, approximately a third of the cells comprise the pluripotent inner cell mass (ICM) and the remainder the differentiated trophectoderm (TE). However, the contribution made by these two cell types to the overall energy metabolism of the intact blastocyst has received relatively little attention. In this study, the metabolism of the intact mouse blastocyst and isolated ICMs were determined in terms of total ATP formation (calculated from oxygen consumption and lactate formation), mitochondrial distribution and amino acid turnover to provide an indication of protein synthesis. The TE consumed significantly more oxygen, produced more ATP and contained a greater number of mitochondria than the ICM. Amino acid turnover was significantly greater (p<0.001) in the TE compared with the ICM. Specifically, there was a significant difference in the utilization of aspartate (p=0.020), glutamate (p=0.024), methionine (p=0.037), and serine (p=0.041) between the cells of the ICM and TE. These data suggest that the TE produces approximately 80% of the ATP generated and is responsible for 90% of amino acid turnover compared with the ICM. The major fate of the energy produced by the TE is likely to be the Na+, K+ATPase (sodium pump enzyme) located on the TE basolateral membrane. In conclusion, the pluripotent cells of the ICM display a relatively quiescent metabolism in comparison with that of the TE." @default.
- W2040232631 created "2016-06-24" @default.
- W2040232631 creator A5035991142 @default.
- W2040232631 date "2006-02-01" @default.
- W2040232631 modified "2023-09-26" @default.
- W2040232631 title "Energy metabolism of the inner cell mass and trophectoderm of the mouse blastocyst" @default.
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- W2040232631 doi "https://doi.org/10.1111/j.1432-0436.2006.00052.x" @default.
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