この記事のまとめ
The PAXgene Blood ccfDNA Tube and the Streck Cell-Free DNA BCT are both products used for the preservation and stabilization of cell-free DNA (ccfDNA) in blood, but they differ in the following aspects.
PAXgene Blood ccfDNA Tube
Preservation and stabilization mechanism:
After blood collection, the tube contains reagents designed to stabilize circulating cell-free DNA (ccfDNA) over an extended period.
By preventing the breakdown of white blood cells, the purity of the ccfDNA can be maintained at a high level.
Applications:
Primarily used for liquid biopsies in cancer research, prenatal testing, and post-transplant monitoring.
Storage duration:
Can be stored for up to 7 days at room temperature, with the option for even longer preservation under refrigerated conditions.
Streck Cell-Free DNA BCT
Preservation and stabilization mechanism:
Contains a patented stabilization reagent that helps maintain the integrity of ccfDNA.
It also prevents the lysis of white blood cells in whole blood samples, thereby reducing contamination of the sample with genomic DNA and maintaining sample quality.
Applications:
Widely used for cancer diagnostics and monitoring, non-invasive prenatal testing (NIPT), and post-transplant monitoring.
Storage duration:
Allows for preservation of samples for up to 14 days at room temperature.
About PAXgene Blood ccfDNA Tube
When the PAXgene Blood ccfDNA Tube is used for non-invasive prenatal parentage testing, it allows the safe and non-invasive collection of fetal DNA from maternal blood with high accuracy and reliability.
For those who wish to analyze the baby’s genetic information, appointments or testing requests can be made as needed.

Summary
Both products excel at stabilizing and preserving circulating cell-free DNA (ccfDNA) from blood samples, but there are important differences in storage duration and specific use conditions.
- PAXgene offers excellent purity but a relatively shorter storage period.
- Streck allows for longer preservation, making it particularly suitable when processing delays are expected.
The decision on which tube to use should be based on the specific requirements of the research or diagnostic application.
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