[Expression in Escherichia coli and immunogenicity of rotavirus VP7]

Area of Science:

• Virology
• Vaccinology
• Molecular Biology

Background:

• Rotaviruses are a leading cause of severe diarrhea in children globally.
• The VP7 outer capsid protein is crucial for rotavirus vaccines.
• Developing effective subunit or recombinant vaccines is a priority.

Purpose of the Study:

• To express a functional part of the rotavirus VP7 gene.
• To create a chimeric protein for potential vaccine development.
• To assess the immunogenicity of the expressed protein.

Main Methods:

• The VP7 gene segment encoding antigenic regions was cloned into E. coli.
• A fusion protein with glutathione S-transferase (GST) was expressed.
• The chimeric protein's reactivity with antibodies and its ability to generate immune responses were evaluated.

Main Results:

• The chimeric VP7-GST protein was successfully expressed in E. coli.
• The fusion protein reacted with polyclonal antibodies against whole rotavirus.
• Immunization of rabbits and mice with the purified protein elicited virus-binding and neutralizing antibodies.

Conclusions:

• The expressed VP7 fusion protein is a promising candidate for rotavirus subunit or recombinant vaccines.
• The study demonstrates the potential of using recombinant DNA technology to produce vaccine antigens.
• Further studies are warranted to evaluate the efficacy of this candidate in preventing rotavirus infections.