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Updated: Jun 10, 2025
09:26
Production of A SARS-CoV-2 Virus like Particle System to Investigate Viral Life Cycles In Vitro
Published on: June 6, 2025
48
M protein ectodomain-specific immunity restrains SARS-CoV-2 variants replication.
Yibo Tang1, Kaiming Tang2, Yunqi Hu3
1Hunan Provincial Key Laboratory of Medical Virology, College of Biology, Hunan University, Changsha, China.
Frontiers in Immunology
|October 17, 2024
Summary
Antibodies targeting the SARS-CoV-2 Membrane protein ectodomain show promise in combating viral infections. This study highlights the M protein
Area of Science:
- Virology
- Immunology
- Vaccine Development
Background:
- SARS-CoV-2 Spike protein mutations reduce vaccine efficacy.
- SARS-CoV-2 Membrane (M) protein is highly conserved and abundant.
- Immunogenicity and protective potential of M protein ectodomain are largely unknown.
Purpose of the Study:
- To investigate the immunogenicity and protective potential of SARS-CoV-2 M protein ectodomain.
- To develop and evaluate M protein ectodomain-derived peptide vaccines.
- To assess the efficacy of M protein-based vaccines against SARS-CoV-2 variants.
Main Methods:
- Peptide synthesis and secondary structure determination (CD spectroscopy).
- Detection of IgG responses (ELISA) and T-cell responses (ELISpot).
- In vivo efficacy studies in K18-hACE2 mice and in vitro viral replication assays.
Main Results:
- High seroconversion rates for M protein ectodomain-specific IgG in convalescent and vaccinated individuals.
- Identified a highly immunogenic peptide (S2M2-30) with in vitro inhibitory effects on viral variants.
- S2M2-30-KLH vaccine significantly reduced lung viral load in mice infected with SARS-CoV-2 Alpha variant.
Conclusions:
- Antibody responses against M protein ectodomain may offer beneficial protection against SARS-CoV-2 infections.
- M protein ectodomain-derived vaccines demonstrate potential for broad protection against SARS-CoV-2 variants.
- Immune mechanisms include neutralizing activity, T-cell responses, and ADCC.
Keywords:
SARS-CoV-2antibody-dependent cellular cytotoxicitycross-inhibitionmembrane proteinserum neutralizing activityMore Related Videos
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