ポリオウイルス3型すべてに対する中和抗体の同時定量のためのシュードウイルスベースの方法

科学分野:

• Virology; Immunology; Public Health

背景:

• Polio virus has three distinct serotypes, necessitating serotype-specific antibody detection.; Conventional neutralization tests (cNT) for poliovirus neutralizing antibodies (NAbs) face biosafety restrictions.; A safe, high-throughput alternative is crucial for poliovirus eradication efforts and post-eradication surveillance.

研究 の 目的:

• To develop a high-throughput, tri-color pseudovirus-based neutralization assay (PBNA).; To enable simultaneous quantification of NAbs against all three poliovirus serotypes.; To provide a safe and efficient alternative to the conventional neutralization test (cNT).

主な方法:

• Generation of high-titer pseudoviruses encoding distinct fluorophores via optimized plasmid co-transfection.; Development of a tri-color PBNA using HEK 293T cells and optimized incubation conditions.; Validation of PBNA sensitivity, specificity, reproducibility, and congruency with cNT.

主要な成果:

• Optimized pseudovirus production yielded titers with >29-fold increase.; PBNA demonstrated high sensitivity, serotype specificity, and excellent reproducibility.; PBNA results showed strong congruency with cNT (r > 0.88) across all serotypes.

結論:

• The tri-color PBNA is a safe, rapid, and reliable alternative to cNT for poliovirus NAb detection.; PBNA is suitable for simultaneous quantification of NAbs against all poliovirus serotypes.; This assay is invaluable for large-scale serosurveillance, vaccine evaluation, and virological studies.