National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM103310
米国
Other private
Simons Foundation (SF349247)
米国
引用
ジャーナル: Sci Transl Med / 年: 2023 タイトル: An influenza H1 hemagglutinin stem-only immunogen elicits a broadly cross-reactive B cell response in humans. 著者: Sarah F Andrews / Lauren Y Cominsky / Geoffrey D Shimberg / Rebecca A Gillespie / Jason Gorman / Julie E Raab / Joshua Brand / Adrian Creanga / Suprabhath R Gajjala / Sandeep Narpala / ...著者: Sarah F Andrews / Lauren Y Cominsky / Geoffrey D Shimberg / Rebecca A Gillespie / Jason Gorman / Julie E Raab / Joshua Brand / Adrian Creanga / Suprabhath R Gajjala / Sandeep Narpala / Crystal S F Cheung / Darcy R Harris / Tongqing Zhou / Ingelise Gordon / LaSonji Holman / Floreliz Mendoza / Katherine V Houser / Grace L Chen / John R Mascola / Barney S Graham / Peter D Kwong / Alicia Widge / Lesia K Dropulic / Julie E Ledgerwood / Masaru Kanekiyo / Adrian B McDermott / 要旨: Current yearly seasonal influenza vaccines primarily induce an antibody response directed against the immunodominant but continually diversifying hemagglutinin (HA) head region. These antibody ...Current yearly seasonal influenza vaccines primarily induce an antibody response directed against the immunodominant but continually diversifying hemagglutinin (HA) head region. These antibody responses provide protection against the vaccinating strain but little cross-protection against other influenza strains or subtypes. To focus the immune response on subdominant but more conserved epitopes on the HA stem that might protect against a broad range of influenza strains, we developed a stabilized H1 stem immunogen lacking the immunodominant head displayed on a ferritin nanoparticle (H1ssF). Here, we evaluated the B cell response to H1ssF in healthy adults ages 18 to 70 in a phase 1 clinical trial (NCT03814720). We observed both a strong plasmablast response and sustained elicitation of cross-reactive HA stem-specific memory B cells after vaccination with H1ssF in individuals of all ages. The B cell response was focused on two conserved epitopes on the H1 stem, with a highly restricted immunoglobulin repertoire unique to each epitope. On average, two-thirds of the B cell and serological antibody response recognized a central epitope on the H1 stem and exhibited broad neutralization across group 1 influenza virus subtypes. The remaining third recognized an epitope near the viral membrane anchor and was largely limited to H1 strains. Together, we demonstrate that an H1 HA immunogen lacking the immunodominant HA head produces a robust and broadly neutralizing HA stem-directed B cell response.
全体 : Cryo-EM structure of the VRC321 clinical trial, vaccine-elicited,...
全体
名称: Cryo-EM structure of the VRC321 clinical trial, vaccine-elicited, human antibody 1B06 in complex with a stabilized NC99 HA trimer
要素
複合体: Cryo-EM structure of the VRC321 clinical trial, vaccine-elicited, human antibody 1B06 in complex with a stabilized NC99 HA trimer
複合体: 1B06 Fab with NC99 HA trimer
タンパク質・ペプチド: Hemagglutinin HA2 chain
タンパク質・ペプチド: Hemagglutinin HA1 chain
タンパク質・ペプチド: 1B06 Heavy Chain
タンパク質・ペプチド: 1B06 Light Chain
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
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超分子 #1: Cryo-EM structure of the VRC321 clinical trial, vaccine-elicited,...
超分子
名称: Cryo-EM structure of the VRC321 clinical trial, vaccine-elicited, human antibody 1B06 in complex with a stabilized NC99 HA trimer タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#4
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超分子 #2: 1B06 Fab with NC99 HA trimer
超分子
名称: 1B06 Fab with NC99 HA trimer / タイプ: complex / ID: 2 / 親要素: 1 / 含まれる分子: #1-#4