A recombinant measles virus expressing biologically active human interleukin-12

Area of Science:

• Immunology
• Virology
• Molecular Biology

Background:

• Measles virus infection is known to cause significant suppression of cell-mediated immunity (CMI).
• This immunosuppression is hypothesized to be linked to reduced levels of interleukin-12 (IL-12), a critical cytokine for CMI.
• The precise role of IL-12 in measles-induced immune dysfunction requires further elucidation.

Purpose of the Study:

• To investigate the role of IL-12 in measles-induced immunosuppression.
• To develop a measles virus vector capable of expressing biologically active human IL-12.
• To assess the stability and expression of IL-12 by the modified measles virus.

Main Methods:

• Generation of a recombinant measles virus (MV) engineered to express human IL-12.
• Insertion of coding sequences for IL-12 subunits (p35 and p40) into the MV genome.
• Evaluation of viral growth, genetic stability, and IL-12 gene expression in cell culture.

Main Results:

• The engineered MV successfully expressed biologically active human IL-12.
• The IL-12-expressing MV exhibited slightly reduced growth kinetics compared to wild-type MV.
• The recombinant virus maintained genetic stability and uniform IL-12 expression over 10 passages.

Conclusions:

• Measles virus serves as a viable vector for delivering immunogenic and therapeutic proteins.
• The engineered IL-12-expressing MV provides a tool for studying IL-12's role in immune responses.
• This approach holds potential for developing novel immunotherapies and vaccines.