Scientists have been on a quest for many years to identify non-invasive “genetic” cancer biomarkers indicating the presence of disease. Their objective was to discover a more effective and patient friendly method for the monitoring and treatment of cancer versus today’s method of tissue biopsies, which are invasive, painful, time consuming, costly, and at times, inaccurate. Recent advances in bioinformatics, next generation sequencing (NGS) technology and an improved understanding of the genetic basis of cancer are revolutionizing personalized medicine.
Circulogene’s “liquid biopsy” services leverage proven technology and provide a non-invasive and cost effective solution for high sensitivity monitoring across a variety of samples, including blood. Our unique technology that uses minimal-volumes of blood provides unprecedented tumor monitoring information with an up-to-date clinical status in a more complete, accurate, timely, less expensive and less invasive fashion.
- Clinically validated assays
- Unprecendented high recovery of cell-free DNA from droplet volumes of blood translates into high sensitivity
- Open platforms, Ion Torrent Proton for both mutation monitoring and profiling
- Integrated workflow for consistent and reliable longitudinal studies
Individualized cancer management for treating cancer patients with precision therapy is currently still challenged by the following limitations:
Tumor heterogeneity; Tumors are heterogeneous and exhibit continuously polyclonal expansion; in turn complicating diagnosis, treatment and the assessment of acquired resistance. Furthermore, tumor tissues are limited both spatially to the region biopsied and temporarily to the state of tumor at the time of biopsy.
Accessibility of tumor tissue; the majority of patients treated with targeted therapies ultimately develop resistance, metastasis or recurrence. Effective monitoring with several tumor samples is not clinically practical with current, invasive biopsy techniques. Most importantly, tumor tissue may not be available or has been exhausted due to multiple testings.
Unmet Needs in Liquid Biopsy & Circulogene’s Solution
Novel cell-free DNA enrichment method for high quantity and high quality starting materials:
Circulating, cell-free DNA is highly fragmented and presented at very low concentrations. This makes its isolation challenging due to the requirements of high volume input, costs and labor intensity. Our proprietary cell-free DNA enrichment process possesses novel characteristic of low input (as low as 50 uL of plasma) and high output (>300ng/mL) allowing ultra high recovery and detection of tumor DNA directly from a droplet volume of unprocessed blood.
Advanced NGS technology for sensitive longitudinal mutation detection:
Detection of low-frequency mutations through periodic cell-free DNA analysis could predict tumor progression before the lesions are large enough to be detected by imaging. Analysis beyond a single mutation could also be warranted to capture tumor heterogeneity for effective treatment decision making. Liquid biopsies are not as spatially limited as tissue biopsies and can show a global spectrum of mutations that occur throughout tumor development in our body. The sensitivity of conventional analytical methods such as Sanger sequencing is not sufficient to detect low-frequency variants. Targeted deep sequencing by next-generation sequencing (NGS) provides a cost-effective alternative for high-throughput analysis of multiple mutations with high sensitivity.
Validated sample processing and analysis procedure in clinical practice:
The utility of cell-free DNA for clinical application demands the implementation of stringent pre-analytical validation of our laboratory developed tests to ensure consistent quality data acquisition in our CLIA certified laboratory.
- Region Analyzed: Mutation hotspot regions of 50 cancer-associated genes
- Sequencing Method: Ion Proton NGS
- Assay Sensitivity: >1.0%
- Target Sequencing Coverage: 5,000x
- Turn Around Time: 7-10 days
- Sample Requirements: blood/Microcontainer, purple top EDTA 250-500 uL tube
- Sample Types: Plasma or Serum
- Sample Input Required: Droplet Volumes (50-500 uL)