PAXgene Blood ccfDNA Tubes (100)

For collection of whole blood samples and stabilization of ccfDNA

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PAXgene Blood ccfDNA Tubes (100)

Cat. No. / ID: 768115

100 blood collection tubes (10 ml). To be used in conjunction with the QIAamp MinElute ccfDNA Kit, the QIAamp Circulating Nucleic Acid Kit (50) or the QIAsymphony PAXgene Blood ccfDNA Kit (192)

For Research Use Only. Not for use in diagnostics procedures. No claim or representation is intended to provide information for the diagnosis, prevention, or treatment of a disease.

✓ 24/7 automatic processing of online orders

✓ Knowledgeable and professional Product & Technical Support

✓ Fast and reliable (re)-ordering

Features

Single-tube collection, stabilization, transport and storage
Immediate stabilization of circulating, cell-free DNA (ccfDNA)
Sample transport and storage at room temperature for up to 10 days
Standardized preanalytical processing of samples

Product Details

The PAXgene Blood ccfDNA Tube is a plastic, closed, evacuated tube for the collection, anticoagulation, transport and storage of human whole blood samples and the stabilization of ccfDNA. When the tube is used in conjunction with the QIAsymphony PAXgene Blood ccfDNA Kit, the QIAGEN QIAamp MinElute ccfDNA Kit or the QIAamp Circulating Nucleic Acid Kit, high-quality ccfDNA can be isolated for use in downstream analytical assays.

Performance

PAXgene Blood ccfDNA Tubes simplify the collection and processing of whole blood for subsequent purification of circulating, cell-free DNA (ccfDNA). The tube additive stabilizes blood cells (see " PAXgene Blood ccfDNA stabilization helps prevent hemolysis allowing distinct separation of plasma" and " PAXgene Blood ccfDNA stabilization minimizes hemolysis compared to alternative solutions") and blocks apoptosis (see " PAXgene Blood ccfDNA stabilization helps prevent apoptosis and fragmentation of gDNA"). Consequently, using PAXgene Blood ccfDNA Tubes for whole blood collection, storage and transport helps prevent the release of intracellular DNA into plasma (see " PAXgene Blood ccfDNA stabilization helps prevent release of gDNA into plasma"). ccfDNA levels are stable for up to 10 days at temperatures up to 25°C, 7 days at temperatures up to 30°C, or 3 days at temperatures up to 37°C prior to processing, so blood samples can be transported and stored to process plasma later.
Plasma generated from whole blood collected into PAXgene Blood ccfDNA Tubes and processed with the QIAsymphony PAXgene Blood ccfDNA Kit, the QIAGEN QIAamp MinElute ccfDNA Kit or the QIAamp Circulating Nucleic Acid Kit, yields high-quality ccfDNA for downstream analytical assays, including but not limited to PCR-based assays and next-generation sequencing (NGS).

See figures

PAXgene Blood ccfDNA stabilization reagent helps prevent hemolysis, allowing clear distinction between plasma and cell fractions. $PAXgene Blood ccfDNA stabilization reagent helps prevent hemolysis, allowing clear distinction between plasma and cell fractions.$ PAXgene Blood ccfDNA stabilization minimizes hemolysis compared to alternative solutions.

PAXgene Blood ccfDNA stabilization minimizes hemolysis compared to alternative solutions.

PAXgene Blood ccfDNA stabilization helps prevent apoptosis and fragmentation of gDNA in whole blood.

PAXgene Blood ccfDNA stabilization reagent helps prevent release of gDNA into plasma.

Principle

The PAXgene Blood ccfDNA Tube is a plastic, closed, evacuated tube for the collection, anticoagulation, transport and storage of human whole blood samples and the stabilization of ccfDNA. The tube contains an additive that anticoagulates blood and stabilizes blood cells via a non-crosslinking stabilization solution. This helps prevent the release of intracellular DNA into the plasma and maintains constant ccfDNA levels during sample storage before processing.

Procedure

The PAXgene Blood ccfDNA Tube allows collection of 10 ml whole blood into a closed, evacuated system. Using standard venipuncture technique, blood is collected into an evacuated tube that contains 1.5 ml cell stabilization additive, resulting in a ratio of 0.15 ml additive per 1 ml blood. Isolation of ccfDNA from plasma is carried out using the QIAsymphony PAXgene Blood ccfDNA Kit, the QIAamp MinElute ccfDNA Kit or the QIAamp Circulating Nucleic Acid Kit.

Applications

ccfDNA purified from plasma generated from whole blood collected into PAXgene Blood ccfDNA Tubes can be used in a wide range of downstream applications, including:

PCR, including digital, multiplex and quantitative real-time PCR
Pharmacogenomic studies
SNP genotyping
Next-generation sequencing

Supporting data and figures

PAXgene Blood ccfDNA stabilization reagent helps prevent release of gDNA into plasma.

Whole blood was stored in EDTA tubes or PAXgene Blood ccfDNA Tubes. ccfDNA was extracted from the plasma immediately following blood collection (t0) or after 6 days storage (t6) at room temperature. Eluate (1 µl) was analyzed using the Agilent High Sensitivity DNA Kit. Plasma from EDTA tubes showed an increase in apoptotic gDNA fragments, whereas plasma from PAXgene Blood ccfDNA Tubes showed a ccfDNA profile comparable to day 0.

$PAXgene Blood ccfDNA stabilization reagent helps prevent hemolysis, allowing clear distinction between plasma and cell fractions.$

PAXgene Blood ccfDNA stabilization helps prevent release of gDNA into plasma during storage and transport.

Specifications

Features	Specifications
Tube size	16 x 100 mm
Stabilization	Up to 10 days at temperatures up to 25°C, 7 days at temperatures up to 30°C, or 3 days at temperatures up to 37°C. Note: Do not store blood-filled tubes below 2°C.
Draw volume	10 ml
Label type	Paper
Quantity	100 tubes/case
Closure type/color	Pearl white BD Hemogard/Blue stopper
Additive/concentration	Additive 1.5 ml

Resources

Our improved noninvasive paternity testing workflow delivers answers with greater confidence

Ullius et al. 2019

Krenz et al. 2019

Hallemariam et al. 2019

Ullius et al., 2015

Ullius et al., 2016

Ullius et al.

Babayan et al. 2019

Voss et al., 2017

Ullius et al. 2019

PAXgene Blood ccfDNA Tube (RUO) Handbook

This note is to inform you that the street address for PreAnalytiX GmbH has changed from “Feldbachstrasse” to “Garstligweg 8”. Please be informed that the update of the product labeling to the new address is ongoing.

In order to reduce paper consumption and oblige the growing number of customers requesting an environmentally friendly alternative to traditionally printed handbooks, we are now providing kit handbooks for Research Use Only (RUO) PreAnalytiX kits on our website only.

IATA-conform transport of whole blood samples in PAXgene Blood ccfDNA Tubes – a simulation and functional test

Demonstrated 3-in-1 workflow for the simultaneous extraction of circulating tumor cell RNA, ccfDNA and leukocyte-derived gDNA from a single blood sample collected and stored in a PAXgene Blood ccfDNA Tube (RUO)

Digital PCR (dPCR) is a powerful technique that detects and quantifies ultra-rare mutations in a high background of wild-type cfDNA down to 0.1% variant allele frequency. Here, we describe end-to-end manual and automated workflows that enable accurate detection and absolute quantification of ultra-rare PIK3CA variants in cfDNA using the QIAcuity Digital PCR System.

FAQ

The QIAsymphony PAXgene Blood ccfDNA Kit can be sued with 2 protocol lines. The standard protocols (STA) predominantely isolate small ccfDNA fragments. The large fragment protocols (LAF) efficiently co-purify large and small ccfDNA fragments. Both lines include a protocol for 2.4 ml and another for 4.8 ml plasma input.

FAQ ID - 3654

The elution volume of the standard protocols (STA) is fixed at 60 µl. The large fragment protocols (LAF) enable elution in 3 different volumes: 60, 100 and 150 µl.

FAQ ID - 3655

The expiration date is printed on the kit label and encoded in the bar code of the reagent cartridges.

FAQ ID - 3651

Whole blood drawn into PAXgene Blood ccfDNA Tubes can be stored for at least 24 hours at 35°C. Higher temperatures will lead to lysis of blood cells and release of genomic DNA into plasma.

FAQ ID - 3640

To date, ccfDNA from blood samples collected and processed using the PAXgene Blood ccfDNA System have been successfully tested in PCR, including multiplex qPCR, and NGS applications.

FAQ ID - 3658

The recommended sample input format is the 14 ml Falcon® polystyrene round bottom tube 17 x 100 mm supplied by Corning (formerly supplied by BD).

FAQ ID - 3653

No. Freezing blood drawn into PAXgene Blood ccfDNA Tubes results in lysis of red and white blood cells and release of genomic DNA.

FAQ ID - 3642

Yes, the inside of PAXgene Blood ccfDNA Tubes is sterilized during production.

FAQ ID - 3636

The expiration date is printed on the tube label and on the shelf carton.

FAQ ID - 3633

When closed properly with the provided strips and stored at room temperature (15–25°C), a reagent cartridge can be used up to 6 weeks after the initial run.

FAQ ID - 3650

Yes. Whole blood in PAXgene Blood ccfDNA Tubes can be stored at 8–15°C for up to 7 days. Storing blood in PAXgene Blood ccfDNA Tubes below room temperature does not extend stability.

FAQ ID - 3641

If cryoprecipitates cannot be resolved completely by vortexing, the sample should be centrifuged to prevent precipitates from blocking the column. To ensure that no cfDNA is co-precipitated, centrifugation can be performed at a lower speed (at 6,800xg for 3 minutes at room temperature, as stated in the Protocol Sheet for the QS DSP Circulating DNA Kit).

FAQ ID - 3646

Plasma generated from whole blood collected into PAXgene Blood ccfDNA Tubes can be stored at 2–8°C for up to 14 days. We recommend freezing plasma at −20°C or −80°C for longer storage periods (long-term storage studies are ongoing).

FAQ ID - 3644

The yield of ccfDNA depends on the target ccfDNA. Nevertheless, yields obtained from PAXgene Blood ccfDNA Tubes are comparable to those obtained from the same volume of plasma separated directly after drawing blood into a spray-dried EDTA tube. In the PAXgene Blood ccfDNA Tube, however, this yield remains stable for up to 7 days when the tube is stored at 15–25°C or for up to 24 hours when stored at 35°C. In contrast, genomic DNA is released from lysed and apoptotic cells in the unstabilized contents of the EDTA tube soon after blood draw.

FAQ ID - 3637

Yes. Further information on phlebotomy technique with the PAXgene Blood ccfDNA Tube can be found in the PAXgene Blood ccfDNA Tube Product Circular under the Resources tab.

FAQ ID - 3626

The number of extractions that can be performed with a kit is independent of sample volume. A kit contains sufficient reagents for 192 extractions.

FAQ ID - 3649

If the instructions for use are followed, there is no possibility of backflow during phlebotomy and thus, no possibility of reagent going into the patient’s arm.

FAQ ID - 3629

A complete 10 ml blood draw ensures optimal results. However, depending on the downstream application and target ccfDNA fragment size, tubes filled with as little as 6.5 ml whole blood can be used without adversely affecting results.

FAQ ID - 3638

Yes, as long as the phlebotomy instructions included with the PAXgene Blood ccfDNA Tubes are properly followed.

FAQ ID - 3630

The PAXgene Blood ccfDNA Tube contains a proprietary formulation that prevents blood coagulation and the release of genomic DNA from blood cells into plasma. Contents of the tube may cause irritation to the eyes, respiratory system and skin. Please refer to the PAXgene Blood ccfDNA Tube Product Circular. For additional information, visit www.preanalytix.com or review the Safety Data Sheet under the Resources tab.

FAQ ID - 3632

The blood draw volume is 10 ml and the stabilization reagent volume is 1.5 ml. Thus, a filled tube holds a volume of 11.5 ml.

FAQ ID - 3631

The QIAsymphony PAXgene Blood ccfDNA Kit is designed to be used with plasma generated from whole blood collected into PAXgene Blood ccfDNA Tubes.

FAQ ID - 3652

Thaw the tubes at room temperature (15–25°C). To minimize the formation of cryoprecipitates, do not thaw at lower temperatures (e.g., 4°C). Alternatively, thaw plasma for 30 minutes at 30°C to completely avoid the formation of cryoprecipitates.

FAQ ID - 3645

Yes. Following a standard phlebotomy protocol, blood is collected into the evacuated tube using a blood collection set and a standardized needle holder that can accommodate a 16 mm diameter tube. Make sure that blood has stopped flowing into the tube before removing the tube from the holder.

For more information on phlebotomy technique, please refer to the PAXgene Blood ccfDNA Tube Product Circular under the Resources tab.

FAQ ID - 3635

No. However, a second centrifugation step helps remove traces of buffy coat that may be accidentally transferred when aspirating plasma after the first centrifugation step.

FAQ ID - 3643

Eluates should be stored at −20°C (long-term storage studies are ongoing).

FAQ ID - 3657

Yes, a customized protocol for elution with 50 µl is available on request.

FAQ ID - 3656

Whole blood drawn into PAXgene Blood ccfDNA Tubes can be stored at 15–25°C for up to 7 days.

FAQ ID - 3639

The normal protocols enable processing 2.4 or 4.8 ml plasma. Other volumes can be accommodated using customized protocols.

FAQ ID - 3648

Store PAXgene Blood ccfDNA Tubes at room temperature (15–25°C) and protect them from direct sunlight.

FAQ ID - 3634

When used in accordance with instructions, the blood collection set eliminates the possibility of patient contact with the reagent in the tube due to backflow of blood.

FAQ ID - 3628