Liquid Biopsy NGS Assay
Liquid Biopsy NGS Assay

Overview


Liquid biopsy has emerged as a transformative approach in precision medicine, enabling non-invasive detection and monitoring of disease through analysis of circulating biomarkers such as circulating tumor DNA (ctDNA), and other nucleic acids present in blood and other body fluids. Unlike traditional tissue biopsies, liquid biopsy offers a safer, repeatable, and more comprehensive method for capturing tumor heterogeneity and real-time disease dynamics.

Next-generation sequencing (NGS) has significantly enhanced the capabilities of liquid biopsy by enabling highly sensitive and multiplexed detection of genomic alterations, including single nucleotide variants (SNVs), insertions and deletions (indels), copy number variations (CNVs), and structural rearrangements. This is particularly critical in oncology, where the fraction of tumor-derived DNA can be extremely low, requiring robust technologies that can accurately detect rare variants amidst a high background of normal DNA.

The success of liquid biopsy NGS assays depends on multiple factors, including efficient extraction of low input cfDNA, preservation of fragment integrity, minimization of technical bias, and the use of advanced library preparation chemistries and bioinformatics pipelines.

Liquid Biopsy NGS Panels for Precision Oncology


The Genes2Me Liquid Biopsy portfolio offers targeted, high-performance NGS panels for lung, breast, and colorectal cancers, enabling comprehensive profiling of key cancer-associated genes. These assays are optimized to work with low-input cfDNA (10–20 ng) while maintaining high sensitivity for detecting SNVs, InDels, CNVs, and gene fusions, even at low variant allele frequencies.

High sensitivity, uniform genome coverage, and error suppression strategies are essential to ensure reliable detection, especially in challenging samples with low variant allele frequencies.

Built with a focus on efficient cfDNA extraction compatibility, robust library preparation, and uniform genome coverage, our panels ensure reliable and reproducible results. High-depth sequencing (≥20,000×) and optimized target capture enable strong on-target performance and consistent coverage across clinically relevant regions, minimizing technical bias and enhancing detection confidence.

Panel Specifications


Parameter
ctDNA Lung
ctDNA Colorectal
ctDNA Breast
No. of genes:
32
25
63 (14 DNA fusions)
Variant types:
SNV / InDels / CNV
SNV / InDels / CNV
SNV / InDels / CNV
Covered region:
Whole CDS
Whole CDS
Whole CDS
Target size:
110 Kb
75 Kb
440 Kb
Coverage Recommendations:
25000X
25000X
25000X
Data requirement (per sample):
3000 Mb
2000 Mb
11000 Mb
Sample type:
Blood / Plasma
Platform:
Illumina, MGI, Element Biosciences
Bioinformatics Support:
G2M CliSeq Interpreter
Primary Analysis: FASTQ to annotated VCF
Secondary Analysis: CNVs, SNVs, InDel, Fusions
Tertiary Analysis: Clinical interpretation

Integrated Sample-to-Report Workflow for Precision Oncology

From sample to report, the Genes2Me liquid biopsy solutions support laboratories with a scalable and integrated workflow—empowering high-throughput testing while maintaining accuracy and operational efficiency. Whether for focused panels or comprehensive genomic profiling, our solutions are designed to deliver clinically actionable insights with precision and consistency.

Liquid Biopsy Workflow

Powered by RAPi-X LB: Automated Precision in ctDNA Isolation


The RapiX-LB is an advanced, fully automated system specifically designed for the extraction of circulating DNA from liquid biopsy samples. Engineered to handle high sample input volumes of up to 3 mL, it ensures efficient recovery of low-abundance nucleic acids critical for downstream molecular applications. Capable of processing up to four samples simultaneously, the RapiX-LB utilizes prefilled reagent cartridges for maximum user convenience and minimal hands-on time.

  • 98% purification accuracy
  • Superior recovery from low-concentration samples
  • Input volume handling up to 700 µL
Lab Equipment

Flexible Automation Tailored for the Liquid biopsy NGS Workflow


The workflow is designed to be automation-friendly, supporting both manual and automated library preparation formats to accommodate varying laboratory throughput requirements. The Assay demonstrates platform-agnostic compatibility and has been validated across commonly used sequencing systems, including Illumina, Element Biosciences, MGI, and Thermo Fisher platforms.

Data Analysis & Reporting with Cliseq Interpreter


NGS data analysis is supported by GATK-based pipelines integrated with the Cliseq Interpreter Platform, a cloud-based clinical interpretation solution designed to streamline analysis of complex genomic data.

  • Quality control, alignment, and variant calling
  • Annotation of somatic variants using curated clinical databases
  • Identification of clinically significant mutations (CSMs)
  • Generation of downloadable annotated VCF files and CSM reports
  • Integration of therapy-linked insights, including FDA-approved drug associations where applicable

Assay performance


Features
ctDNA Lung*
ctDNA Colorectal*
ctDNA Breast*
Coverage Uniformity (0.2X):
>99%
>99%
>99%
Reproducibility (%):
96
95.5
96.3
Sensitivity (%):
96
93.7
96
On Target Ratio (%):
70-85
70-85
70-85

*The panel’s performance is from the Illumina platform.

High-Fidelity Coverage for Confident Variant Detection

Allelic Discrimination Plot

Coverage profiles of critical genes (ESR1, BRCA1, PIK3CA, ERBB2, and GATA3) exhibit strong concordance between mean (solid line) and median (dashed line) depth, demonstrating uniform sequencing and minimal bias across all target regions. This alignment highlights the assay’s robust performance and reliability, ensuring confident results across diverse breast cancer samples.

Mutation Burden Landscape Across Breast Cancer Genes

Melting Curve

Distribution of variant allele frequencies (VAFs) in 158 breast cancer samples reveals distinct mutation patterns. Genes such as AR, CCND1, and FGFR1 exhibit higher median VAFs with broad variability, indicating a substantial mutation burden and potential influence on disease progression. Conversely, APC, EGFR, and KIT show lower, more uniform VAFs, suggesting a stable or limited role in the overall genomic architecture.

Efficient On-Target Capture for Liquid Biopsy Precision

Standard Curve

The ctDNA breast cancer panel consistently delivers more than 75% on-target alignment, reflecting its smart design and efficient target capture. This ensures reliable mutation detection from low-input samples, enabling early diagnosis, treatment monitoring, and scalable diagnostic utility.

Uniform BRCA1 Exon Coverage with G2M ctDNA Breast Cancer Panel

Standard Curve

The figure illustrates read coverage for BRCA1 exons 3, 4, and 5. The top panel highlights the BRCA1 target region (green), the middle panel displays per-base coverage depth achieved by the G2M ctDNA Breast Cancer Panel (blue), and the bottom panel represents the gene’s coding regions as annotated by RefSeq (orange). This visualization underscores uniform coverage across clinically significant exons, ensuring reliable variant detection.

Mutation Hotspots Driving Breast Cancer Genomics

Relative Quantification Analysis

Oncoplot showcasing the 12 most frequently mutated genes in ctDNA breast cancer samples. Missense mutations (green) dominate, followed by in-frame deletions (yellow), while multi-hit events (black) indicate multiple mutation types within the same gene. The right panel summarizes mutation frequency per gene.

Ordering Information


Commercial Name Cat No. Pack Size Platform
ctDNA Lung NGS Test Kit G710028-1 24 T Illumina
G710028-2 96 T Illumina
G710028-3 96 T – EZY Illumina – EZY
G710028-4 24 T MGI
G710028-5 96 T MGI
G710028-6 96 T – EZY MGI – EZY
G710028-7 24 T Aviti
G710028-8 96 T Aviti
G710028-9 96 T – EZY Aviti – EZY
G710028-10 24 T Thermo
G710028-11 96 T Thermo
G710028-12 96 T – EZY Thermo – EZY
ctDNA Colorectal NGS Test Kit G710029-1 24 T Illumina
G710029-2 96 T Illumina
G710029-3 96 T – EZY Illumina – EZY
G710029-4 24 T MGI
G710029-5 96 T MGI
G710029-6 96 T – EZY MGI – EZY
G710029-7 24 T Aviti
G710029-8 96 T Aviti
G710029-9 96 T – EZY Aviti – EZY
G710029-10 24 T Thermo
G710029-11 96 T Thermo
G710029-12 96 T – EZY Thermo – EZY
ctDNA-Breast NGS Test Kit G710011-1 24 T Illumina
G710011-1-2 96 T Illumina
G710011-1-3 96 T – EZY Illumina – EZY
G710011-1-4 24 T MGI
G710011-1-5 96 T MGI
G710011-1-6 96 T – EZY MGI – EZY
G710011-1-7 24 T Aviti
G710011-1-8 96 T Aviti
G710011-1-9 96 T – EZY Aviti – EZY
G710011-1-10 24 T Thermo
G710011-1-11 96 T Thermo
G710011-1-12 96 T – EZY Thermo – EZY

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