Hepatitis B core virus-like particles bearing Pgp3 antigen enhance immune response against genital chlamydial infection in mice.

Int Immunopharmacol

Institute of Pathogenic Biology, School of Nursing, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province, University of South China, Hengyang 421001, Hunan, People's Republic of China. Electronic address:

Published: December 2024

Chlamydia trachomatis Pgp3 protein-induced immunoprotection is effective but incomplete, which requires the suitable adjuvants to enhance its immune response. Within this context, Hepatitis B core virus-like particles (HBc-VLP) emerge as nanoscale protein particles capable of incorporating either endogenous or exogenous antigens or epitopes. In this study, HBc-Pgp3 chimeric protein was accomplished by integrating the identified dominant epitope of the Pgp3 protein into the major immunodominant region of a truncated HBc-VLP, which was realized in the pET28a (+) vector and expressed via the E. coli BL21 expression system. The efficacious expression and purification of the recombinant HBc-Pgp3 facilitated a tripartite immunization regimen in mice. The immunological assessment encompassed the measurement of IgG antibody and cytokine levels through ELISA, alongside flow cytometric analysis of the CD4 Th1 cell-mediated immune responses within the murine spleen. Comparative analysis revealed that the HBc-Pgp3-vaccinated mice demonstrated superior IgG antibody titers and subtypes relative to the controls. Moreover, the HBc-Pgp3 formulation was instrumental in augmenting IFN-γ production, enhancing the efficiency of Chlamydia muridarum clearance post-challenge, and severity of hydrosalpinx within the lower genital tract. Collectively, these findings illuminate the potential of the novel HBc-Pgp3 chimeric construct as an innovative vaccine candidate, offering augmented immunoprotection against chlamydial infection.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.intimp.2024.113663DOI Listing

Publication Analysis

Top Keywords

hepatitis core
8
core virus-like
8
virus-like particles
8
enhance immune
8
immune response
8
chlamydial infection
8
hbc-pgp3 chimeric
8
igg antibody
8
particles bearing
4
bearing pgp3
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!