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| Title | Immune memory shapes human polyclonal antibody responses to H2N2 vaccination. |
|---|---|
| Journal, issue, pages | Cell Rep, Vol. 43, Issue 5, Page 114171, Year 2024 |
| Publish date | May 7, 2024 |
 Authors | Yuhe R Yang / Julianna Han / Hailee R Perrett / Sara T Richey / Alesandra J Rodriguez / Abigail M Jackson / Rebecca A Gillespie / Sarah O'Connell / Julie E Raab / Lauren Y Cominsky / Ankita Chopde / Masaru Kanekiyo / Katherine V Houser / Grace L Chen / Adrian B McDermott / Sarah F Andrews / Andrew B Ward /   |
| PubMed Abstract | Influenza A virus subtype H2N2, which caused the 1957 influenza pandemic, remains a global threat. A recent phase 1 clinical trial investigating a ferritin nanoparticle vaccine displaying H2 ...Influenza A virus subtype H2N2, which caused the 1957 influenza pandemic, remains a global threat. A recent phase 1 clinical trial investigating a ferritin nanoparticle vaccine displaying H2 hemagglutinin (HA) in H2-naive and H2-exposed adults enabled us to perform comprehensive structural and biochemical characterization of immune memory on the breadth and diversity of the polyclonal serum antibody response elicited. We temporally map the epitopes targeted by serum antibodies after vaccine prime and boost, revealing that previous H2 exposure results in higher responses to the variable HA head domain. In contrast, initial responses in H2-naive participants are dominated by antibodies targeting conserved epitopes. We use cryoelectron microscopy and monoclonal B cell isolation to describe the molecular details of cross-reactive antibodies targeting conserved epitopes on the HA head, including the receptor-binding site and a new site of vulnerability deemed the medial junction. Our findings accentuate the impact of pre-existing influenza exposure on serum antibody responses post-vaccination. |
 External links | Cell Rep / PubMed:38717904 |
| Methods | EM (single particle) |
| Resolution | 20.0 Å |
| Structure data |  EMDB-41514: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-1 week 0  EMDB-41515: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-1 at week 4  EMDB-41516: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-1 at week 16  EMDB-41517: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-1 at week 20  EMDB-41518: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-2 at week 0  EMDB-41519: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 2-1 at week 4  EMDB-41520: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-2 at week 16  EMDB-41521: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 1-2 at week 20  EMDB-41522: Polyclonal immune complex of fab binding the H2 HA from serum of subject 1-3 at week 20  EMDB-41541: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 3-3 at week 0  EMDB-41543: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 3-3 at week 16  EMDB-41544: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 3-3 at week 20  EMDB-41545: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-1 at week 0  EMDB-41546: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-1 at week 4  EMDB-41547: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-1 at week 16  EMDB-41548: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-1 at week 20  EMDB-41549: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-2 at week 0  EMDB-41550: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-2 at week 4  EMDB-41551: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-2 at week 16  EMDB-41552: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-2 at week 20  EMDB-41553: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-3 at week 0  EMDB-41554: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-3 at week 4  EMDB-41555: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-3 at week 16  EMDB-41556: Polyclonal immune complex of Fab binding the H2 HA from serum of subject 4-3 at week 20  EMDB-41557: Polyclonal immune complex of Fab binding the H1 HA from serum of subject 1-1 at week 0  EMDB-41558: Polyclonal immune complex of Fab binding the H1 HA from serum of subject 1-1 at week 4  EMDB-41559: Polyclonal immune complex of Fab binding the H1 HA from serum of subject 1-1 at week 16 |
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Homo sapiens (human)