cfPure® Cell Free DNA Extraction Kit

Rapid and efficient purification of circulating cell free DNA

AMSBIO offers cfPure® Cell Free DNA Extraction Kit for scalable and automation-friendly isolation of circulating cell-free DNA (cfDNA) from patient serum or plasma samples. These kits utilize silica-coated paramagnetic particles to purify cell free DNA (cfDNA) from less than 1mL to greater than 10mL of serum or plasma.

The buffers were developed to ensure efficient recovery of 100bp-500bp DNA fragments in order to maximize recovery of cell-free DNA. The recovered DNA is suitable for a wide range of downstream applications, such as bisulfite sequencing, NGS, and qPCR.


Reproducible & efficient recovery of cfDNA

To assess reproducibility, DNA was extracted from 1mL of plasma from 4 different human donors in duplicate using the cfPure® cell free DNA extraction kit

Plasma IDTotal DNA recovered (ng)

Superior recovery of cfDNA compared to competitors

cfDNA was purified from 2mL of plasma from 3 different donors by either the cfPure® Cell Free DNA Extraction Kit or by a competitor’s magnetic bead-based cell free DNA extraction kit. DNA recovery was assessed either by a fluorescent method or by qPCR using primers complimentary to ALU sequence DNA.

Extraction KitSample IDcfDNA recovered per ml of plasma(ng)115 ALU sequence cfDNA per ml of plasma (ng) (by PCR)
Competitor T14.991.97
Competitor T26.183.21
Competitor T36.933.79

Importance of cfDNA

Circulating cfDNA is normally comprised of DNA fragments from healthy cells. However, apoptotic cells, necrotic cells, cancer cells, and intact cells all release cfDNA into the bloodstream.

Recently, DNA shed from tumor cells has been identified as a non-invasive method of screening biomarkers for the early diagnosis and prognosis of cancer. This method, sometimes called "liquid biopsy", can provide guidance for treatment decisions, and can enable monitoring of cancer therapy, and organism-wide screening for the presence of nascent metastatic tumors in drug-treated cancer patients.

Circulating cfDNA is easily collected by standard, minimally invasive, blood draws. Compared with sampling of DNA from FFPE tumor specimens, cfDNA can provide superior real-time data on primary and metastatic tumors, and offers the potential to analyze biomarkers for mutational information.

In addition, fetal cfDNA can be isolated from peripheral maternal blood and can be used for fetal sex determination and prenatal diagnosis of chromosomal aneuploidy and many other genetic disorders.