For the enrichment and molecular characterization of circulating tumor cells (CTCs) from whole human blood

Features

Efficient isolation and detection of CTCs from whole blood

Molecular characterization of CTCs

High specificity and sensitivity

Processing of multiple samples in parallel

Product Details

AdnaTest ColonCancer allows molecular characterization of CTCs by combining AdnaTest ColonCancerSelect with AdnaTest ColonCancerDetect using the Combination of Combinations Principle (COCP). AdnaTest ColonCancerSelect is a highly specific immunomagnetic cell-selection system for enriching circulating tumor cells from peripheral blood. AdnaTest ColonCancerDetect allows sensitive analysis of colon cancer-associated gene expression in immunomagnetically enriched tumor cells by reverse transcription and PCR.

Performance

AdnaTest ColonCancer is a highly specific immunomagnetic cell selection system for enriching circulating tumor cells from peripheral blood and includes a highly sensitive RT-PCR for detecting colon cancer-specific mRNA markers.

Principle

AdnaTest technology uses an optimized combination of antibodies for cell selection in 5 ml whole blood and a combination of tumor-associated markers for the detection of tumor cells: EpCAM, CEA and EGFR.

Procedure

The AdnaTest uses a two-step process (Select and Detect) to generate results within 5 hours. AdnaTest ColonCancerSelect enables the immunomagnetic enrichment of tumor cells from whole blood via epithelial- and tumor-associated antigens. Antibodies against epithelial- and tumor-associated antigens are conjugated to magnetic beads for labeling of tumor cells. Labeled cells are extracted by a magnetic particle concentrator (AdnaMag-L and AdnaMag-S), lysed and mRNA is then purified from these lysates . In the second step, the isolated mRNA is transcribed into cDNA and can be amplified using multiplex PCR. AdnaTest ColonCancerDetect contains Oligo (dT) 25-coated beads for the isolation of mRNA from the lysate of pre-enriched tumor cells. Reverse transcription results in cDNA that can subsequently be used as template for tumor cell detection and characterization by multiplex PCR. Multiplex PCR provides tumor-associated gene expression profiles for a variety of relevant tumor markers to ensure that the selected cells are cancer cells. The PrimerMix ColonDetect allows amplification of 3 tumor-associated genes and 1 control gene . The primers generate fragments of the following sizes:

PrimerMix ColonDetect

 Target gene          PCR Fragment Size (bp)

 GA733-2                                  383

 CEA                                          231

 EGFR                                  163

 Actin (internal PCR control) 120

Importantly, the AdnaTest is an open platform that allows the profiling of additional custom selected mRNA targets for comphrehensive biomarker discovery.

Applications

Isolation of CTCs from whole human blood

Molecular characterization of CTCs

Biomarker discovery

mRNA profiling

Liquid biopsy