ジャーナル: Nat Med / 年: 2015 タイトル: Hemagglutinin-stem nanoparticles generate heterosubtypic influenza protection. 著者: Hadi M Yassine / Jeffrey C Boyington / Patrick M McTamney / Chih-Jen Wei / Masaru Kanekiyo / Wing-Pui Kong / John R Gallagher / Lingshu Wang / Yi Zhang / M Gordon Joyce / Daniel Lingwood / ...著者: Hadi M Yassine / Jeffrey C Boyington / Patrick M McTamney / Chih-Jen Wei / Masaru Kanekiyo / Wing-Pui Kong / John R Gallagher / Lingshu Wang / Yi Zhang / M Gordon Joyce / Daniel Lingwood / Syed M Moin / Hanne Andersen / Yoshinobu Okuno / Srinivas S Rao / Audray K Harris / Peter D Kwong / John R Mascola / Gary J Nabel / Barney S Graham / 要旨: The antibody response to influenza is primarily focused on the head region of the hemagglutinin (HA) glycoprotein, which in turn undergoes antigenic drift, thus necessitating annual updates of ...The antibody response to influenza is primarily focused on the head region of the hemagglutinin (HA) glycoprotein, which in turn undergoes antigenic drift, thus necessitating annual updates of influenza vaccines. In contrast, the immunogenically subdominant stem region of HA is highly conserved and recognized by antibodies capable of binding multiple HA subtypes. Here we report the structure-based development of an H1 HA stem-only immunogen that confers heterosubtypic protection in mice and ferrets. Six iterative cycles of structure-based design (Gen1-Gen6) yielded successive H1 HA stabilized-stem (HA-SS) immunogens that lack the immunodominant head domain. Antigenic characterization, determination of two HA-SS crystal structures in complex with stem-specific monoclonal antibodies and cryo-electron microscopy analysis of HA-SS on ferritin nanoparticles (H1-SS-np) confirmed the preservation of key structural elements. Vaccination of mice and ferrets with H1-SS-np elicited broadly cross-reactive antibodies that completely protected mice and partially protected ferrets against lethal heterosubtypic H5N1 influenza virus challenge despite the absence of detectable H5N1 neutralizing activity in vitro. Passive transfer of immunoglobulin from H1-SS-np-immunized mice to naive mice conferred protection against H5N1 challenge, indicating that vaccine-elicited HA stem-specific antibodies can protect against diverse group 1 influenza strains.
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 16.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: CTFFIND3, RELION 詳細: final reconstruction from 49% of the initial particle set 使用した粒子像数: 6540