Development of Human Rhinovirus RNA Reference Material Using Digital PCR.

Area of Science:

• Virology
• Molecular Biology
• Biotechnology

Background:

• Human rhinovirus (RV) causes respiratory illnesses and its replication is linked to intracellular membrane modifications.
• Accurate quantification of RV RNA is crucial for understanding disease severity, asymptomatic infections, and viral load correlations.
• A standardized reference material (RM) is essential for quality control in molecular diagnostics and antiviral research.

Purpose of the Study:

• To develop and characterize a human rhinovirus (RV) RNA reference material for accurate viral load quantification.
• To establish a reliable standard for evaluating molecular diagnostic tests and antiviral agents.
• To ensure consistency and comparability of RV RNA measurements across different laboratories and experiments.

Main Methods:

• Preparation of an RV RNA mixture by combining viral RNA with a storage solution and matrix.
• Dispensing and storage of the RV RNA mixture at -80 °C.
• Assessment of RM homogeneity and stability using reverse transcription droplet digital polymerase chain reaction (RT-ddPCR).

Main Results:

• The developed RV RNA reference material achieved a measured copy number of approximately 1.6 × 10^5 copies/μL.
• The material demonstrated good bottle-to-bottle homogeneity (around 11%).
• The RV RM exhibited stability for 1 week at 4 °C and -20 °C, and for 12 months at -80 °C.

Conclusions:

• The newly developed RV RNA reference material enhances the dependability of molecular diagnostic tests by providing a precise reference for absolute viral copy number.
• This RM serves as a valuable standard for quality evaluation, performance assessment of diagnostic products, and research into antiviral agents.
• The standardization of RV RNA quantification through this RM will improve the reliability and comparability of research findings.