RNA extraction method is crucial for human papillomavirus E6/E7 oncogenes detection

Area of Science:

• Oncology
• Virology
• Molecular Diagnostics

Background:

• Human papillomavirus (HPV) DNA testing is vital for cervical cancer management.
• Improved specificity in cervical screening requires identifying women at risk for progressive disease.
• HPV E6/E7 oncogene mRNA expression is a potential biomarker for enhanced cervical screening.

Purpose of the Study:

• To validate RNA extraction methods for HPV mRNA detection.
• To assess HPV E6/E7 mRNA expression in cervical specimens.
• To correlate E6/E7 mRNA expression with lesion pathology and progression.

Main Methods:

• Analyzed 50 HPV-genotyped cervical swab specimens.
• Compared three RNA extraction kits: bioMérieux, Roche, and Qiagen.
• Detected HPV mRNA using the NucliSens EasyQ HPV test.

Main Results:

• E6/E7 mRNA positivity rates varied by kit: bioMérieux (62%), Roche (24%), Qiagen (6%).
• Higher viral RNA expression correlated with lesions and progression.
• bioMérieux showed higher sensitivity (77.27%), Roche higher PPV (75%) and specificity (89.28%).

Conclusions:

• Magnetic bead-based RNA extraction methods yielded better results than column-based methods.
• Both bioMérieux and Roche kits are suitable for E6/E7 mRNA detection.
• No single method achieved both high sensitivity and specificity; further validation is needed for routine screening.