Seroreactive recombinant herpes simplex virus type 2-specific glycoprotein G

Area of Science:

• Virology
• Immunology
• Biotechnology

Background:

• Herpes simplex virus type 2 (HSV-2) causes significant human infections.
• HSV-2 possesses a unique envelope protein, glycoprotein G (gG), with type-specific epitopes.
• Accurate serological detection of HSV-2 infection is crucial for diagnosis and management.

Purpose of the Study:

• To express and purify a recombinant form of HSV-2 glycoprotein G (gG).
• To evaluate the specificity and utility of the recombinant gG protein in detecting HSV-2 antibodies.

Main Methods:

• Expression of a portion of the HSV-2 gG gene as a fusion protein in Escherichia coli.
• Purification of the recombinant protein using ion-exchange chromatography.
• Serological assays including indirect immunofluorescence, immunoblot, and patient serum analysis.

Main Results:

• A 60,000-molecular-weight recombinant gG protein was successfully purified.
• The recombinant protein elicited type-specific antibodies in mice reactive to HSV-2 but not HSV-1.
• The recombinant gG demonstrated high reactivity with HSV-2 positive patient sera (14/15) and no reactivity with HSV-2 negative sera (0/15).
• Prevalence study showed 27.6% reactivity in random individuals, aligning with expected HSV-2 infection rates.

Conclusions:

• The purified recombinant HSV-2 gG protein is type-specific.
• This recombinant protein is a valuable tool for detecting HSV-2 specific antibody responses.
• The findings support the use of this recombinant gG in diagnostic assays for HSV-2 infection.