Harmonizing Cell-Free DNA Collection and Processing Practices through Evidence-Based Guidance.

Area of Science:

• Biochemistry
• Molecular Biology
• Clinical Diagnostics

Background:

• Circulating cell-free DNA (cfDNA) shows clinical utility but faces reproducibility challenges.
• Variability in preanalytic methods (e.g., collection tubes, processing, storage) impacts cfDNA data quality.
• Lack of standardized protocols hinders cfDNA testing advancement.

Purpose of the Study:

• To establish evidence-based best practices for cfDNA biospecimen collection and processing.
• To harmonize preanalytic workflows across institutions for improved cfDNA analysis.
• To provide guidelines for optimal cfDNA testing in research and clinical settings.

Main Methods:

• Development of cfDNA-specific guidelines by the NCI's Biorepositories and Biospecimen Research Branch.
• Vetting of guidelines by a panel of international experts in the field.
• Inclusion of optimal procedures and acceptable alternatives for laboratory implementation.

Main Results:

• Guidelines address critical preanalytic variables affecting cfDNA yield, integrity, and fragment length.
• Standardized protocols aim to reduce cellular genomic contamination and improve cfDNA quantification.
• Harmonized practices are expected to enhance the accuracy and reproducibility of cfDNA analysis.

Conclusions:

• Standardized cfDNA preanalytic procedures are essential for clinical decision-making.
• The "Biospecimen Evidence-based Best Practices for Cell-free DNA" guidelines offer a framework for harmonization.
• Implementing these guidelines will improve the reliability of cfDNA testing in research and clinical practice.