Protective Immunity Induced by Virus-Like Particle Containing Merozoite Surface Protein 9 of Plasmodium berghei

Su-Hwa Lee1, Hae-Ji Kang1, Ki-Back Chu1

  • 1Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Korea.

Vaccines
|August 6, 2020
PubMed

Insights

Virus-like particles (VLPs) targeting malaria merozoite surface protein 9 (MSP-9) induced immune responses in mice. This malaria vaccine candidate prolonged survival against Plasmodium berghei infection.

Area of Science:

  • Immunology
  • Vaccinology
  • Parasitology

Background:

  • Merozoite surface protein 9 (MSP-9) from Plasmodium is a potential malaria vaccine target.
  • Its role in erythrocyte invasion makes it crucial for parasite lifecycle.

Purpose of the Study:

  • To develop and evaluate virus-like particles (VLPs) targeting Plasmodium berghei MSP-9.
  • To assess the protective efficacy of MSP-9 VLPs in a murine malaria model.

Main Methods:

  • Generation of VLPs displaying P. berghei MSP-9.
  • Immunization of mice with MSP-9 VLPs.
  • Assessment of humoral and cellular immune responses (IgG, CD4+, CD8+ T cells).
  • Evaluation of protection against lethal P. berghei challenge.

Main Results:

  • VLP vaccination elicited P. berghei-specific IgG antibodies and T cell responses.
  • Vaccinated mice showed increased CD4+ and CD8+ effector memory T cells and memory B cells.
  • MSP-9 VLP immunization reduced pro-inflammatory cytokines (IFN-γ, IL-6), parasite replication, and prolonged survival.

Conclusions:

  • MSP-9 VLPs effectively induced immune responses in mice.
  • This malaria vaccine candidate demonstrated protection against P. berghei infection.
  • MSP-9 VLPs show promise as a potential malaria vaccine.