Field-Applicable Loop-Mediated Isothermal Amplification for the Detection of Seven Common Human Papillomavirus...

Area of Science:

• Molecular Biology
• Biotechnology
• Public Health

Background:

• Persistent human papillomavirus (HPV) infection is a primary risk factor for cervical cancer development.
• Current detection methods may be complex and unsuitable for resource-limited field settings.
• Loop-mediated isothermal amplification (LAMP) offers a simple, rapid alternative for nucleic acid detection.

Purpose of the Study:

• To develop and validate visual and microfluidic LAMP assays for the field detection of seven common HPV subtypes.
• To evaluate the analytical and clinical sensitivity, specificity, and speed of the developed LAMP assays.
• To assess the suitability of these assays for HPV DNA testing in resource-limited environments.

Main Methods:

• Established hydroxy naphthol blue (HNB)-based visual LAMP and evagreen-based fluorescent LAMP on a microfluidic chip (LAMP-chip).
• Tested assays for analytical sensitivity (19-233 copies/reaction) and clinical sensitivity (97.35% visual, 98.23% LAMP-chip) against HPV DNA.
• Implemented a comprehensive quality control system including internal, positive, and negative controls.

Main Results:

• Both visual and LAMP-chip assays demonstrated high clinical sensitivity (97.35% and 98.23%, respectively) and 100% specificity.
• Assays achieved rapid results in under 50 minutes without complex nucleic acid extraction.
• Analytical sensitivity ranged from 19-233 copies/reaction, indicating high detection capability.

Conclusions:

• The developed visual and LAMP-chip assays are sensitive, specific, and rapid for detecting common HPV DNA.
• These LAMP methods are suitable for field investigations and primary healthcare settings, especially where resources are limited.
• The assays offer a promising tool for widespread HPV screening and cervical cancer prevention efforts.