tetano
Editor, Senior Moderator
Immunity
. 2022 Nov 2;S1074-7613(22)00556-8.
doi: 10.1016/j.immuni.2022.10.015. Online ahead of print.
Co-immunization with hemagglutinin stem immunogens elicits cross-group neutralizing antibodies and broad protection against influenza A viruses
Syed M Moin[SUP] 1 [/SUP], Jeffrey C Boyington[SUP] 1 [/SUP], Seyhan Boyoglu-Barnum[SUP] 1 [/SUP], Rebecca A Gillespie[SUP] 1 [/SUP], Gabriele Cerutti[SUP] 2 [/SUP], Crystal Sao-Fong Cheung[SUP] 1 [/SUP], Alberto Cagigi[SUP] 1 [/SUP], John R Gallagher[SUP] 3 [/SUP], Joshua Brand[SUP] 1 [/SUP], Madhu Prabhakaran[SUP] 1 [/SUP], Yaroslav Tsybovsky[SUP] 4 [/SUP], Tyler Stephens[SUP] 4 [/SUP], Brian E Fisher[SUP] 1 [/SUP], Adrian Creanga[SUP] 1 [/SUP], Sila Ataca[SUP] 1 [/SUP], Reda Rawi[SUP] 1 [/SUP], Kizzmekia S Corbett[SUP] 5 [/SUP], Michelle C Crank[SUP] 1 [/SUP], Gunilla B Karlsson Hedestam[SUP] 6 [/SUP], Jason Gorman[SUP] 1 [/SUP], Adrian B McDermott[SUP] 1 [/SUP], Audray K Harris[SUP] 3 [/SUP], Tongqing Zhou[SUP] 1 [/SUP], Peter D Kwong[SUP] 1 [/SUP], Lawrence Shapiro[SUP] 7 [/SUP], John R Mascola[SUP] 1 [/SUP], Barney S Graham[SUP] 1 [/SUP], Masaru Kanekiyo[SUP] 8 [/SUP]
Affiliations
Abstract
Current influenza vaccines predominantly induce immunity to the hypervariable hemagglutinin (HA) head, requiring frequent vaccine reformulation. Conversely, the immunosubdominant yet conserved HA stem harbors a supersite that is targeted by broadly neutralizing antibodies (bnAbs), representing a prime target for universal vaccines. Here, we showed that the co-immunization of two HA stem immunogens derived from group 1 and 2 influenza A viruses elicits cross-group protective immunity and neutralizing antibody responses in mice, ferrets, and nonhuman primates (NHPs). Immunized mice were protected from multiple group 1 and 2 viruses, and all animal models showed broad serum-neutralizing activity. A bnAb isolated from an immunized NHP broadly neutralized and protected against diverse viruses, including H5N1 and H7N9. Genetic and structural analyses revealed strong homology between macaque and human bnAbs, illustrating common biophysical constraints for acquiring cross-group specificity. Vaccine elicitation of stem-directed cross-group-protective immunity represents a step toward the development of broadly protective influenza vaccines.
Keywords: HA stalk; HA stem; bnAb; cryo-EM; ferritin; influenza; nanoparticle; nonhuman primate; pandemic preparedness; vaccine.
. 2022 Nov 2;S1074-7613(22)00556-8.
doi: 10.1016/j.immuni.2022.10.015. Online ahead of print.
Co-immunization with hemagglutinin stem immunogens elicits cross-group neutralizing antibodies and broad protection against influenza A viruses
Syed M Moin[SUP] 1 [/SUP], Jeffrey C Boyington[SUP] 1 [/SUP], Seyhan Boyoglu-Barnum[SUP] 1 [/SUP], Rebecca A Gillespie[SUP] 1 [/SUP], Gabriele Cerutti[SUP] 2 [/SUP], Crystal Sao-Fong Cheung[SUP] 1 [/SUP], Alberto Cagigi[SUP] 1 [/SUP], John R Gallagher[SUP] 3 [/SUP], Joshua Brand[SUP] 1 [/SUP], Madhu Prabhakaran[SUP] 1 [/SUP], Yaroslav Tsybovsky[SUP] 4 [/SUP], Tyler Stephens[SUP] 4 [/SUP], Brian E Fisher[SUP] 1 [/SUP], Adrian Creanga[SUP] 1 [/SUP], Sila Ataca[SUP] 1 [/SUP], Reda Rawi[SUP] 1 [/SUP], Kizzmekia S Corbett[SUP] 5 [/SUP], Michelle C Crank[SUP] 1 [/SUP], Gunilla B Karlsson Hedestam[SUP] 6 [/SUP], Jason Gorman[SUP] 1 [/SUP], Adrian B McDermott[SUP] 1 [/SUP], Audray K Harris[SUP] 3 [/SUP], Tongqing Zhou[SUP] 1 [/SUP], Peter D Kwong[SUP] 1 [/SUP], Lawrence Shapiro[SUP] 7 [/SUP], John R Mascola[SUP] 1 [/SUP], Barney S Graham[SUP] 1 [/SUP], Masaru Kanekiyo[SUP] 8 [/SUP]
Affiliations
- PMID: 36356572
- DOI: 10.1016/j.immuni.2022.10.015
Abstract
Current influenza vaccines predominantly induce immunity to the hypervariable hemagglutinin (HA) head, requiring frequent vaccine reformulation. Conversely, the immunosubdominant yet conserved HA stem harbors a supersite that is targeted by broadly neutralizing antibodies (bnAbs), representing a prime target for universal vaccines. Here, we showed that the co-immunization of two HA stem immunogens derived from group 1 and 2 influenza A viruses elicits cross-group protective immunity and neutralizing antibody responses in mice, ferrets, and nonhuman primates (NHPs). Immunized mice were protected from multiple group 1 and 2 viruses, and all animal models showed broad serum-neutralizing activity. A bnAb isolated from an immunized NHP broadly neutralized and protected against diverse viruses, including H5N1 and H7N9. Genetic and structural analyses revealed strong homology between macaque and human bnAbs, illustrating common biophysical constraints for acquiring cross-group specificity. Vaccine elicitation of stem-directed cross-group-protective immunity represents a step toward the development of broadly protective influenza vaccines.
Keywords: HA stalk; HA stem; bnAb; cryo-EM; ferritin; influenza; nanoparticle; nonhuman primate; pandemic preparedness; vaccine.