Purification & Quantification – Cell-Free Circulating DNA / RNA

Cell-Free DNA RNA Extraction Kits | cfDNA cfRNA Purification

Discover high-sensitivity cell-free DNA and RNA purification and quantification kits for liquid biopsy, biomarker research, and sequencing applications.

Advanced Solutions for Liquid Biopsy and Molecular Analysis

The purification and quantification of cell-free circulating DNA (cfDNA) and RNA (cfRNA) play a critical role in modern molecular biology workflows. These nucleic acids, found in biological fluids such as plasma and serum, provide valuable insights for non-invasive genetic analysis, biomarker discovery, and advanced research applications.

Optimized purification systems are designed to efficiently isolate low-abundance nucleic acids while preserving integrity and ensuring compatibility with sensitive downstream technologies such as qPCR, digital PCR, and next-generation sequencing (NGS).

What Is Cell-Free DNA and RNA?

Cell-free nucleic acids are short fragments of DNA and RNA released into circulation from cells through physiological processes.

Key Characteristics :

  • Present in plasma, serum, and other body fluids.
  • Typically fragmented and low in concentration.
  • Highly sensitive to degradation.
  • Require specialized purification methods.

circulating cell-free DNA circulating cell-free dna

Workflow Overview: From Sample to Analysis

Efficient purification workflows are essential for obtaining reliable results.

Core Steps:

  1. Sample collection (plasma, serum, or body fluids)
  2. Lysis and release of circulating nucleic acids
  3. Binding of cfDNA/cfRNA to purification matrix
  4. Washing to remove contaminants
  5. Elution of purified nucleic acids

=>These workflows are optimized to ensure maximum recovery and minimal contamination, which is critical for downstream molecular applications.

High-Sensitivity Purification Technologies

Specialized kits for circulating DNA/RNA focus on:

  • Ultra-sensitive recovery of low-input nucleic acids
  • Minimization of genomic DNA contamination
  • Preservation of fragment size distribution
  • Compatibility with automation systems

Quantification of Cell-Free DNA and RNA

Accurate quantification is essential due to the low concentration of circulating nucleic acids.

Common Quantification Methods:

  • Fluorometric assays
  • qPCR-based quantification
  • Digital PCR
  • Spectrophotometry (for preliminary assessment)

These methods allow precise evaluation of nucleic acid concentration prior to downstream applications.

Cell-Free Circulating RNA Purification

Cell-Free Circulating RNA Purification