Development and Performance Evaluation of T-prep24: A Novel Automated Nucleic Acid Extraction System Based on Silica...

Area of Science:

• Clinical Microbiology
• Molecular Diagnostics
• Biotechnology

Background:

• Increasing demand for rapid, sensitive, and specific molecular detection of infectious pathogens in clinical laboratories.
• Growing need for domestically produced nucleic acid extraction equipment in South Korea, particularly post-COVID-19 pandemic.

Purpose of the Study:

• To develop and evaluate the performance of a novel magnetic bead-based automated nucleic acid extraction system, the T-Prep24 system.
• To assess the T-Prep24 system's efficacy using clinical respiratory specimens compared to existing commercial systems.

Main Methods:

• Nucleic acids were extracted from 180 respiratory specimens using the T-Prep24 system, TANBead system, and Qiagen system.
• Extracted nucleic acid quality and concentration were assessed using spectrophotometry and Qubit fluorometry.
• SARS-CoV-2 detection was performed using the PowerChek SARS-CoV-2 Real-time PCR kit.

Main Results:

• The T-Prep24 system yielded lower median nucleic acid concentrations (0.685 ng/µL) compared to TANBead (0.985 ng/µL) and Qiagen (4.710 ng/µL) systems (p < 0.001).
• PCR assays using T-Prep24-extracted nucleic acids showed minimal bias against TANBead but significant bias against Qiagen.
• T-Prep24 results were identical to TANBead and showed only two discrepancies compared to Qiagen for SARS-CoV-2 detection.

Conclusions:

• The T-Prep24 system demonstrates reliability and effectiveness for nucleic acid extraction in clinical settings.
• Further research is recommended to expand the T-Prep24 system's applicability to diverse pathogens and sample types.