tetano
Editor, Senior Moderator
J Med Virol
. 2023 Apr;95(4):e28721.
doi: 10.1002/jmv.28721. M2e-specific antibodies protect against influenza PR8 virus in an isotype and route dependent manner
Tingting Sun[SUP] 1 2 [/SUP], Yingdan Wang[SUP] 1 [/SUP], Peng Zou[SUP] 1 [/SUP], Qimin Wang[SUP] 1 [/SUP], Jiangyan Liu[SUP] 1 [/SUP], Wanli Liu[SUP] 3 [/SUP], Jinghe Huang[SUP] 1 [/SUP], Fan Wu[SUP] 2 [/SUP]
Affiliations
The ectodomain of influenza matrix protein 2 (M2e) is a promising target for the development of universal prophylactic and therapeutic agents against influenza viruses of different subtypes. We constructed three M2e-specific monoclonal antibody variants, M2A1-1 (IgG1), M2A1-2a (IgG2a), M2A1-2b (IgG2b), which have the same Fab region targeting the M2e epitope but different isotypes, and compared their protective efficacy in influenza PR8-infected mice. We found that anti-M2e antibodies provided protection against influenza virus in a subtype-dependent manner, with the IgG2a variant providing significantly better protection with lower virus titers and milder lung injury than IgG1 and IgG2b isotypes. Additionally, we observed that the protective efficacy was dependent on the administration routes, with intranasal administration of antibody providing better protection than intraperitoneal administration. The timing of administration was also critical in determining the protective efficacy; while all the antibody isotypes provided protection when administered before influenza challenge, only IgG2a provided minimal protection when the antibodies were administered after virus challenge. These results provide valuable information for optimizing the therapeutics usage of M2e-based antibodies and furthering the development of M2e-based universal influenza vaccines.
Keywords: M2e; antibody; influenza A virus; isotype; protection.
. 2023 Apr;95(4):e28721.
doi: 10.1002/jmv.28721. M2e-specific antibodies protect against influenza PR8 virus in an isotype and route dependent manner
Tingting Sun[SUP] 1 2 [/SUP], Yingdan Wang[SUP] 1 [/SUP], Peng Zou[SUP] 1 [/SUP], Qimin Wang[SUP] 1 [/SUP], Jiangyan Liu[SUP] 1 [/SUP], Wanli Liu[SUP] 3 [/SUP], Jinghe Huang[SUP] 1 [/SUP], Fan Wu[SUP] 2 [/SUP]
Affiliations
- PMID: 37185862
- DOI: 10.1002/jmv.28721
The ectodomain of influenza matrix protein 2 (M2e) is a promising target for the development of universal prophylactic and therapeutic agents against influenza viruses of different subtypes. We constructed three M2e-specific monoclonal antibody variants, M2A1-1 (IgG1), M2A1-2a (IgG2a), M2A1-2b (IgG2b), which have the same Fab region targeting the M2e epitope but different isotypes, and compared their protective efficacy in influenza PR8-infected mice. We found that anti-M2e antibodies provided protection against influenza virus in a subtype-dependent manner, with the IgG2a variant providing significantly better protection with lower virus titers and milder lung injury than IgG1 and IgG2b isotypes. Additionally, we observed that the protective efficacy was dependent on the administration routes, with intranasal administration of antibody providing better protection than intraperitoneal administration. The timing of administration was also critical in determining the protective efficacy; while all the antibody isotypes provided protection when administered before influenza challenge, only IgG2a provided minimal protection when the antibodies were administered after virus challenge. These results provide valuable information for optimizing the therapeutics usage of M2e-based antibodies and furthering the development of M2e-based universal influenza vaccines.
Keywords: M2e; antibody; influenza A virus; isotype; protection.