Inhibition of protein synthesis in L cells infected with vesicular stomatitis virus

Area of Science:

• Virology
• Molecular Biology
• Cell Biology

Background:

• Vesicular stomatitis virus (VSV) is known to disrupt host cell functions.
• Protein synthesis is a critical cellular process often targeted by viral infections.
• Understanding viral mechanisms of host protein synthesis inhibition is key to antiviral research.

Purpose of the Study:

• To elucidate the mechanisms by which VSV inhibits protein synthesis in L cells.
• To differentiate between distinct phases and dependencies of VSV-induced protein synthesis inhibition.

Main Methods:

• Infection of L cells with VSV under varying conditions.
• Assessment of protein synthesis inhibition.
• Use of ultraviolet (UV) irradiation to probe mechanisms.
• Multiplicity of infection (MOI) studies.

Main Results:

• VSV-mediated inhibition of protein synthesis in L cells necessitates new protein synthesis after infection.
• Two distinct inhibitory mechanisms were identified: an early, multiplicity-dependent, UV-insensitive inhibition, and a progressive, UV-sensitive inhibition.

Conclusions:

• VSV employs a biphasic strategy to inhibit host cell protein synthesis.
• Both phases of inhibition are dependent on the synthesis of new viral or cellular proteins.
• The differential sensitivity to UV light suggests distinct molecular players in each phase.