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Related Experiment Videos

Fermentation process for double-stranded ribonucleic acid, an interferon inducer.

B D Lago, J Birnbaum, A L Demain

    Applied Microbiology
    |September 1, 1972
    PubMed
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    Double-stranded RNA (ds-RNA) from MS2 bacteriophage infection of Escherichia coli can be produced in large quantities. A specific mutant, MU9, enables high-yield ds-RNA production for potential therapeutic applications.

    Area of Science:

    • Virology
    • Molecular Biology
    • Biotechnology

    Background:

    • Double-stranded ribonucleic acid (ds-RNA) from bacteriophage MS2 infection is a known interferon inducer.
    • Escherichia coli infected with the MU9 mutant of MS2 produces high levels of ds-RNA.

    Purpose of the Study:

    • To develop a process for large-scale production of ds-RNA using the MS2 bacteriophage MU9 mutant.
    • To optimize conditions for maximizing ds-RNA yield in Escherichia coli.

    Main Methods:

    • Preparation of MU9 lysate for large-scale fermentation.
    • Infection of high-density Escherichia coli cultures grown in corn steep liquor medium with MU9.
    • Measurement of accumulated ds-RNA levels.

    Main Results:

    Related Experiment Videos

    • Over 300 µg/ml of ds-RNA accumulated after MU9 infection in optimized conditions.
    • This yield is approximately 300 times higher than that obtained with wild-type MS2 in tryptone medium.
    • Maximum ds-RNA formation occurred within 3 hours, with stability for at least 17 hours within cells.

    Conclusions:

    • The MU9 mutant of MS2 bacteriophage is highly effective for large-scale ds-RNA production.
    • Optimized fermentation conditions significantly enhance ds-RNA yield and production efficiency.
    • The rapid and stable accumulation of ds-RNA suggests potential for biotechnological and therapeutic applications.