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High-Resolution Profiling of Fetal DNA Clearance from Maternal Plasma by Massively Parallel Sequencing
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High-Resolution Profiling of Fetal DNA Clearance from Maternal Plasma by Massively Parallel Sequencing
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High-Resolution Profiling of Fetal DNA Clearance from Maternal Plasma by Massively Parallel Sequencing
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Journal Article
High-Resolution Profiling of Fetal DNA Clearance from Maternal Plasma by Massively Parallel Sequencing
2013
Overview
With the advent of massively parallel sequencing (MPS), DNA analysis can now be performed in a genomewide manner. Recent studies have demonstrated the high precision of MPS for quantifying fetal DNA in maternal plasma. In addition, paired-end sequencing can be used to determine the size of each sequenced DNA fragment. We applied MPS in a high-resolution investigation of the clearance profile of circulating fetal DNA.
Using paired-end MPS, we analyzed serial samples of maternal plasma collected from 13 women after cesarean delivery. We also studied the transrenal excretion of circulating fetal DNA in 3 of these individuals by analyzing serial urine samples collected after delivery.
The clearance of circulating fetal DNA occurred in 2 phases, with different kinetics. The initial rapid phase had a mean half-life of approximately 1 h, whereas the subsequent slow phase had a mean half-life of approximately 13 h. The final disappearance of circulating fetal DNA occurred at about 1 to 2 days postpartum. Although transrenal excretion was involved in the clearance of circulating fetal DNA, it was not the major route. Furthermore, we observed significant changes in the size profiles of circulating maternal DNA after delivery, but we did not observe such changes in circulating fetal DNA.
MPS of maternal plasma and urinary DNA permits high-resolution study of the clearance profile of circulating fetal DNA.
