PAXgene Blood miRNA Kit for microRNA Isolation

For purification of miRNA and total RNA from whole blood


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PAXgene Blood miRNA Kit (50)

Cat. No. / ID:  763134

For 50 RNA preps: PAXgene Spin Columns, PAXgene Shredder Spin Columns, Processing Tubes, Microcentrifuge Tubes, RNase-Free DNase, RNase-Free Reagents and Buffers; to be used in conjunction with PAXgene Blood RNA Tubes
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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


  • Effective isolation of intracellular RNA, including miRNA
  • Standardized sample processing prior to analysis
  • Integrated DNase treatment for removal of gDNA
  • Isolation can be automated on QIAcube instruments

Product Details

The PAXgene Blood miRNA System consists of the PAXgene Blood miRNA Kit for purification of total RNA, including RNA longer than approximately 18 nucleotides, and PAXgene Blood RNA Tubes (available from BD, cat. no. 762165) for collection, stabilization, and transport of blood. Purification is carried out using silica-based RNA purification technology in a spin-column format. Purification can be carried out manually, using a microcentrifuge, or automated on the QIAcube Connect. Used with the tubes, the kit provides a complete preanalytical solution for collection and stabilization through to purification of high-quality total RNA, including miRNA, for molecular analysis.


The protocols of the PAXgene Blood miRNA Kit provide optimal binding conditions for several RNA species. The total RNA isolated includes mRNA and RNA molecules smaller than 200 nucleotides, such as 5.8S rRNA, 5S rRNA, tRNAs, and miRNAs (see figure "High yields of small RNA species"). The chemistry of the PAXgene Blood miRNA Kit is complimentary to various downstream applications including QIAGEN's PCR technologies. The obtained high quality miRNA can be analyzed using the QIAGEN miScript PCR System* (see figure "Analysis of miRNA species") or miRCURY LNA miRNA Probe PCR System (see figure "analysis of miRNA using miRCURY LNA miRNA Probe PCR Assays with miRCURY LNA miRNA Probe PCR System").

*This product is discontinued and my not be available for purchase in your region.


Copy numbers of individual RNA species in blood can change significantly during storage or transport at ambient temperature, making reliable studies of gene expression difficult. Both stabilization of RNA molecules after collection and an efficient RNA isolation protocol are needed to maximize insights into expression profiles of whole blood. Based on proven silica-membrane technology in trusted spin column format, and when combined with PAXgene Blood RNA Tubes, the PAXgene Blood miRNA Kit provides the chemistry and rapid procedure to isolate high-quality total RNA and miRNA.


Cell lysis and stabilization of intracellular RNA takes place upon collection of whole blood in PAXgene Blood RNA Tubes, effectively preventing changes to gene expression profiles by ex vivo gene regulation or RNA degradation. After removal of cellular debris, kit buffers provide optimal conditions for RNA molecules to bind to the silica membrane. Contaminants are washed away and trace DNA is removed by treatment with DNase I. Pure RNA, including miRNA, is then eluted in a low-salt elution buffer and denatured by heating (see figure "PAXgene Blood miRNA procedure").


The isolated RNA is ready for use in a wide range of downstream applications, including:

  • cDNA synthesis
  • Gene expression arrays
  • End-point RT-PCR
  • Quantitative RT-PCR, including TaqMan technology
  • Next-generation sequencing

Supporting data and figures


ApplicationsRT-PCR and real-time RT-PCR, differential display, cDNA synthesis, northern, dot, and slot blot analyses, primer extension, microarray analysis
Elution volume80 µl
Time per run or per prepManual: 90 min/12 samples; Automated: 125 min/12 samples, Reduced hands-on time.
TechnologySilica technology
Main sample typeWhole blood
Yield3–18 µg/2.5 ml sample
FormatSpin column
ProcessingManual (centrifugation) or automated on QIAcube instruments
Sample amount2.5 ml


Brochures & Guides (3)
For collection, transport, and storage of whole blood and stabilization and purification of intracellular RNA


For purification of intracellular RNA, including miRNA, from whole blood


Safety Data Sheets (1)
Technical Information and Important Notes (2)
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.
Application Notes (2)
Comparison of miRNA recovery from the PAXgene Blood miRNA System and the Tempus Blood RNA Tube processed with the Tempus Spin RNA Isolation Kit


Typical total RNA yields from PAXgene Blood RNA Tubes processed with the PAXgene Blood miRNA Kit
Kit Handbooks (1)
For purification of miRNA and total RNA from whole blood.
Certificates of Analysis (1)


Where can I find additional information for PreAnalytiX PAXgene products?
You can find additional information relating to the PreAnalytiX PAXgene products on the PreAnalytiX website .
FAQ ID - 3515
Can the PAXgene Blood miRNA System be used for diagnostic or prognostic procedures?
No. The PAXgene Blood miRNA Kit is ‘For Research Use Only’. Not for use in diagnostic procedures. No claim or representation is intended to provide information for the diagnosis, prevention, or treatment of a disease.
FAQ ID -2494
What are the expected yields of RNA from PAXgene Blood RNA Tubes isolated with the PAXgene Blood miRNA kit?
Typical yields of RNA isolated from 2.5 ml healthy, human, whole blood (4.8 x 106 –1.1 x 107 leukocytes/ml) are ≥3 μg for >95% of the samples processed (Refer to Technical Note) . Since yields are highly donor-dependent, individual yields may vary.
FAQ ID - 3481
Is it possible to isolate genomic DNA or viral nucleic acids with PAXgene Blood miRNA protocol?
No. The PAXgene Blood RNA System has been optimized for cellular RNA only. PreAnalytiX offers a dedicated system for collection and isolation of genomic DNA from human whole blood (see PAXgene Blood DNA System) .
FAQ ID - 3483
What can I use to isolate RNA smaller than 200 nucleotides?

For the isolation of microRNA (miRNA) specifically, we have developed the miRNeasy Mini Kit and the miRNeasy 96 Kit for isolation from cells and tissues.   We also have the PAXgene Blood miRNA and Tissue miRNA kits for isolation from blood stored in PAXgene Blood RNA tubes and PAXgene Tissue Containers, respectively.  Other miRNA isolation supplementary protocols can also be found by searching our comprehensive protocols at

FAQ ID -115
What is the maximum number of samples for the QIAcube variant of the PAXgene Blood miRNA protocol for a single run?

Up to 12 samples can be processed in a single run.

FAQ ID - 3482
How great is the enrichment of miRNA when using the dedicated PAXgene Blood miRNA Kit compared to the PAXgene Blood RNA Kit?

If the PAXgene Blood miRNA Kit is used, an enrichment of small RNAs as part of the total RNA is achieved. The enrichment may vary between different miRNA species and samples, but on average an enrichment of about three or more CT-values can be expected.

FAQ ID -2495
Do eluates generated with the PAXgene Blood miRNA Kit contain residual genomic DNA?
Typically, the amount of genomic DNA (gDNA) in eluates of the PAXgene Blood miRNA Kit is very low as long as the kit is stored and used according to the instructions of the PAXgene Blood miRNA Kit Handbook. For downstream applications that are especially sensitive to gDNA contamination, a specialized protocol for the QIAcube helps reduce gDNA content further and can be downloaded from the QIAcube product page.
FAQ ID - 3637
Which sample types can be processed using the PAXgene Blood miRNA protocols?
2.5 ml whole human blood collected in PAXgene Blood RNA Tubes
FAQ ID - 3478
Do you have stability data for RNA isolated with PAXgene miRNA Kit?
Stability data are not yet available, but a stability study was started.
FAQ ID - 3480
How many samples can be processed with the PAXgene Blood miRNA Kit?
The kit can be used for 50 RNA isolations.
FAQ ID - 3477
Do the samples require pretreatment before starting the manual protocol or before loading onto the QIAcube instrument?
Yes. Samples have to be incubated at least 2 h at room temperature (18-22°C). Incubation of the PAXgene Blood RNA Tube overnight may increase yields slightly in some cases. Room temperature storage for up to three days has no effect on the RNA profile. During the preparation of the RNA the manual pretreatment consist of a centrifugation and a pellet resuspenion step (see the PAXgene Blood miRNA Handbook ).
FAQ ID - 3479