Immunity · 2022
Co-immunization with hemagglutinin stem immunogens elicits cross-group neutralizing antibodies and broad protection against influenza A viruses.
СтатьяПоддержка NIH: внешняя программаResearch Support, N.I.H., IntramuralПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Moin Syed M, Boyington Jeffrey C, Boyoglu-Barnum Seyhan, Gillespie Rebecca A, Cerutti Gabriele, Cheung Crystal Sao-Fong, Cagigi Alberto, Gallagher John R, Brand Joshua, Prabhakaran Madhu, Tsybovsky Yaroslav, Stephens Tyler, Fisher Brian E, Creanga Adrian, Ataca Sila, Rawi Reda, Corbett Kizzmekia S, Crank Michelle C, Karlsson Hedestam Gunilla B, Gorman Jason, McDermott Adrian B, Harris Audray K, Zhou Tongqing, Kwong Peter D, Shapiro Lawrence, Mascola John R, Graham Barney S, Kanekiyo Masaru
Аннотация
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.