Fetal Dna Enrichment
Fetal Dna Enrichment - Related Videos
08:53
Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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2025
Enrichment and sequencing of protein-associated nascent DNA (eSPAN) was developed to detect the relative abundance of a chromatin-associated protein on two replicating DNA strands, thereby revealing molecular insight into chromatin replication and its coupled processes. This protocol describes eSPAN procedures in yeast and mouse embryonic stem (ES) cells.
12:33
Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
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Cited by 4 •
2017
The comparison and optimization of two plant organellar DNA enrichment methods are presented: traditional differential centrifugation and fractionation of the total gDNA based on methylation status. We assess the resulting DNA quantity and quality, demonstrate performance in short-read next-generation sequencing, and discuss the potential for use in long-read single-molecule sequencing.
03:46
Stool Microbial DNA Isolation: Studying the Effect of Environmental Enrichment on Microbiome Diversity in Murine Tumor Model
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2023
This video describes DNA isolation protocol from stool samples of colon tumor-bearing mice. The extracted DNA is amplified using PCR, and the product is further cleaned using a magnetic beads-based approach. This method can be used to determine the effect of environmental enrichment on colon microbiota and animal mortality.
08:04
Murine Fetal Echocardiography
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Cited by 7 •
2013
Fetal and perinatal death is a common feature when studying genetic alterations affecting cardiac development. High-frequency ultrasound imaging has improved 2-D resolution and can provide excellent information on early cardiac development and is an ideal method to detect the impact on cardiac structure and function prior to death.
09:35
An Experimental System to Study Mechanotransduction in Fetal Lung Cells
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Cited by 7 •
2012
Mechanical forces play a key role in lung development and lung injury. Here, we describe a method to isolate rodent fetal lung type II epithelial cells and fibroblasts and to expose them to mechanical stimulation using an in vitro system.
FAQs
Fragment-size selection can increase fetal representation because fetal and maternal DNA fragments may differ in length. A method separates or preferentially retains fragments within a size range associated with a higher fetal fraction. This reduces the maternal DNA background entering downstream molecular analysis, potentially improving the sensitivity and analytical accuracy of prenatal assays.
Placental-specific DNA methylation provides a molecular distinction between fetal-derived and maternal DNA. Enrichment strategies can exploit methylation patterns that are associated with placental material, allowing fetal signals to be concentrated within a mixed sample. This approach complements physical fragment-based selection and can improve the relative fetal fraction available for subsequent genetic analysis.
Targeted sequence capture enriches selected genetic sequences rather than relying primarily on fragment length or methylation differences. By concentrating particular regions before analysis, it can direct the assay toward sequences relevant to chromosomal abnormalities, inherited variants, or pregnancy-related biomarkers. The strategy therefore links enrichment more directly to the genetic targets being investigated.
A typical workflow begins with a mixed biological sample, most commonly maternal plasma containing cell-free DNA. The material undergoes an enrichment step based on fragment size, placental-specific methylation, targeted sequence capture, or another supported selection principle. The enriched fraction then proceeds to molecular analysis, where improved fetal representation can support more accurate interpretation.
Enrichment can support analyses aimed at detecting chromosomal abnormalities, inherited genetic variants, and other pregnancy-related biomarkers. Increasing the relative fetal fraction gives these assays more fetal-derived material to evaluate against the abundant maternal background. In bioengineering applications, this supports the development of sensitive molecular tests for noninvasive prenatal screening and precision diagnostics.
The approach presents a bioengineering challenge involving selective recovery of a low-abundance signal from a complex biological mixture. Designing effective enrichment methods can improve analytical accuracy while reducing dependence on invasive sampling. It also helps engineers develop molecular assays that are better suited to prenatal screening, where fetal genetic information must be measured through maternal biological material.