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Ribozyme-mediated decrease in mumps virus nucleocapsid mRNA level and progeny in infected vero cells.

J Albuquerque-Silva¹, F Milican, A Bollen

¹Applied Genetics, University of Brussels, Belgium.

Antisense & Nucleic Acid Drug Development

|August 6, 1999

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Endogenously expressed ribozymes targeting mumps virus nucleocapsid (NP) mRNA significantly reduced viral titers by 80%. This study demonstrates ribozymes

Area of Science:

Molecular Biology
Virology
Biochemistry

Background:

Ribozymes are catalytic RNA molecules with potential therapeutic applications.
Mumps virus nucleocapsid (NP) mRNA is a key target for antiviral strategies.

Purpose of the Study:

To investigate the efficacy of endogenously expressed ribozymes against mumps virus.
To assess the impact of ribozymes on NP mRNA levels and viral replication.

Main Methods:

Construction of eukaryotic expression vectors for hammerhead and hairpin ribozymes targeting mumps NP mRNA.
Transfection of Vero cells with ribozyme vectors and control RNAs.
Measurement of viral titers, NP mRNA levels, and in vitro/in vivo RNA cleavage.

Main Results:

Related Experiment Videos

Both catalytic ribozymes and non-catalytic control RNAs reduced viral yields.
Ribozymes demonstrated a significantly higher inhibition of viral titers (approx. 80%) compared to controls (approx. 35%).
NP mRNA levels were reduced in cells expressing catalytic ribozymes, correlating with inhibited viral growth.

Conclusions:

Endogenously expressed ribozymes effectively inhibit mumps virus replication.
Catalytic activity of ribozymes is crucial for significant antiviral effects.
Challenges in detecting in vivo RNA cleavage products necessitate careful experimental design and controls.