Transgenic mice susceptible to poliovirus

Area of Science:

• Virology
• Genetics
• Immunology

Background:

• Poliovirus causes poliomyelitis, a severe neurological disease.
• Understanding poliovirus pathogenesis requires suitable animal models.

Purpose of the Study:

• To develop poliovirus-sensitive transgenic mice.
• To evaluate these mice as a model for poliovirus infection and vaccine assessment.

Main Methods:

• Introduction of the human poliovirus receptor gene into the mouse genome.
• Analysis of gene expression using RNA blot hybridization and polymerase chain reaction.
• Inoculation of transgenic mice with poliovirus and observation of clinical symptoms.

Main Results:

• Transgenic mice expressed human poliovirus receptor mRNA in various tissues.
• Mice were susceptible to all three poliovirus serotypes, showing paralysis and neurological symptoms.
• Poliovirus antigens were detected in motor neurons of the central nervous system, similar to humans.
• Attenuated poliovirus vaccine strains required higher doses to induce paralysis compared to virulent strains.

Conclusions:

• Transgenic mice serve as a valuable model for studying poliovirus pathogenesis.
• These mice can be used to assess the efficacy of oral poliovirus vaccines.
• The model replicates human poliovirus infection in the central nervous system.