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Real Time RT-PCR

Real Time RT-PCR

Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...

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BLV-CoCoMo Dual qPCR Assay Targeting LTR Region for Quantifying Bovine Leukemia Virus: Comparison with Multiplex

Sonoko Watanuki¹, Aronggaowa Bao¹, Etsuko Saitou²

¹Laboratory of Global Infectious Diseases Control Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.

Pathogens (Basel, Switzerland)

|January 8, 2025

Summary

This summary is machine-generated.

The Liquid Dual-CoCoMo assay offers superior diagnostic and analytical performance for quantifying bovine leukemia virus (BLV) proviral load compared to commercial assays. This advancement aids in better disease progression and transmission risk assessment.

Keywords:

bovine leukemia virus (BLV)commercial kit duplex long terminal repeat (LTR)pol gene proviral load (PVL)quantitative real-time PCR (qPCR)

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Area of Science:

Veterinary Virology
Molecular Diagnostics
Quantitative PCR (qPCR)

Background:

Bovine leukemia virus (BLV) proviral load (PVL) is crucial for assessing disease progression and transmission risk in cattle.
Real-time quantitative PCR (qPCR) is the standard method for PVL quantification.
Existing multiplex assays may have limitations in diagnostic and analytical sensitivity.

Purpose of the Study:

To evaluate the diagnostic and analytical performance of the novel Liquid Dual-CoCoMo assay for BLV PVL quantification.
To compare the Liquid Dual-CoCoMo assay against a commercially available multiplex assay (Takara) targeting the BLV pol region.

Main Methods:

Development of the Liquid Dual-CoCoMo assay, a dual-target qPCR method using coordination of common motif (CoCoMo) degenerate primers.
Simultaneous detection of BLV long terminal repeat (LTR) using a FAM-labeled MGB probe and BoLA-DRA using a VIC-labeled MGB probe.
Comparative analysis of diagnostic sensitivity and specificity against ELISA/Single-CoCoMo qPCR, and analytical sensitivity using a BLV molecular clone.

Main Results:

The Liquid Dual-CoCoMo assay demonstrated higher diagnostic sensitivity and specificity compared to the Takara multiplex assay.
Analytical sensitivity of the Liquid Dual-CoCoMo assay was superior to the Takara multiplex assay when tested with a BLV molecular clone.
The assay targets the BLV LTR region, offering a distinct target compared to the pol region targeted by the Takara assay.

Conclusions:

The Liquid Dual-CoCoMo assay exhibits superior diagnostic and analytical performance for BLV PVL quantification.
This assay represents an improvement over existing commercially available multiplex qPCR assays targeting the pol region.
The enhanced performance of the Liquid Dual-CoCoMo assay can lead to more accurate BLV disease management and control strategies.