CARs derived from broadly neutralizing, human monoclonal antibodies identified by single B cell sorting target hepatitis B virus-positive cells
To design new CARs targeting hepatitis B virus (HBV), we isolated human monoclonal antibodies recognizing the HBV envelope proteins from single B cells of a patient with a resolved infection. HBV-specific memory B cells were isolated by incubating peripheral blood mononuclear cells with biotinylated...
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| Hauptverfasser: | , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 April 2024
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| In: |
Frontiers in immunology
Year: 2024, Jahrgang: 15, Pages: 1-14 |
| ISSN: | 1664-3224 |
| DOI: | 10.3389/fimmu.2024.1340619 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3389/fimmu.2024.1340619
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| Verfasserangaben: | Sophia Schreiber, Lisa S. Dressler, Eva Loffredo-Verde, Theresa Asen, Stephanie Färber, Wenshi Wang, Tanja Groll, Anindita Chakraborty, Fenna Kolbe, Christoph Kreer, Anna D. Kosinska, Sylvain Simon, Stephan Urban, Florian Klein, Stanley R. Riddell and Ulrike Protzer |
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| 520 | |a To design new CARs targeting hepatitis B virus (HBV), we isolated human monoclonal antibodies recognizing the HBV envelope proteins from single B cells of a patient with a resolved infection. HBV-specific memory B cells were isolated by incubating peripheral blood mononuclear cells with biotinylated hepatitis B surface antigen (HBsAg), followed by single-cell flow cytometry-based sorting of live, CD19+ IgG+ HBsAg+ cells. Amplification and sequencing of immunoglobulin genes from single memory B cells identified variable heavy and light chain sequences. Corresponding immunoglobulin chains were cloned into IgG1 expression vectors and expressed in mammalian cells. Two antibodies named 4D06 and 4D08 were found to be highly specific for HBsAg, recognized a conformational and a linear epitope, respectively, and showed broad reactivity and neutralization capacity against all major HBV genotypes. 4D06 and 4D08 variable chain fragments were cloned into a 2nd generation CAR format with CD28 and CD3zeta intracellular signaling domains. The new CAR constructs displayed a high functional avidity when expressed on primary human T cells. CAR-grafted T cells proved to be polyfunctional regarding cytokine secretion and killed HBV-positive target cells. Interestingly, background activation of the 4D08-CAR recognizing a linear instead of a conformational epitope was consistently low. In a preclinical model of chronic HBV infection, murine T cells grafted with the 4D06 and the 4D08 CAR showed on target activity indicated by a transient increase in serum transaminases, and a lower number of HBV-positive hepatocytes in the mice treated. This study demonstrates an efficient and fast approach to identifying pathogen-specific monoclonal human antibodies from small donor cell numbers for the subsequent generation of new CARs. | ||
| 650 | 4 | |a Animals | |
| 650 | 4 | |a Antibodies, Monoclonal | |
| 650 | 4 | |a B-Lymphocytes | |
| 650 | 4 | |a broad neutralization | |
| 650 | 4 | |a Broadly Neutralizing Antibodies | |
| 650 | 4 | |a chimeric antigen receptor | |
| 650 | 4 | |a HBsAg | |
| 650 | 4 | |a Hepatitis B | |
| 650 | 4 | |a Hepatitis B Surface Antigens | |
| 650 | 4 | |a Hepatitis B virus | |
| 650 | 4 | |a hepatitis B virus envelope proteins | |
| 650 | 4 | |a human monoclonal antibody | |
| 650 | 4 | |a Humans | |
| 650 | 4 | |a Immunotherapy, Adoptive | |
| 650 | 4 | |a linear epitope | |
| 650 | 4 | |a Mice | |
| 650 | 4 | |a Receptors, Chimeric Antigen | |
| 650 | 4 | |a single B cell sorting | |
| 650 | 4 | |a T-Lymphocytes | |
| 650 | 4 | |a tonic signaling | |
| 700 | 1 | |a Dressler, Lisa S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Loffredo-Verde, Eva |e VerfasserIn |4 aut | |
| 700 | 1 | |a Asen, Theresa |e VerfasserIn |4 aut | |
| 700 | 1 | |a Färber, Stephanie |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Wenshi |e VerfasserIn |0 (DE-588)1207849820 |0 (DE-627)1694170705 |4 aut | |
| 700 | 1 | |a Groll, Tanja |e VerfasserIn |4 aut | |
| 700 | 1 | |a Chakraborty, Anindita |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kolbe, Fenna |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kreer, Christoph |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kosinska, Anna D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Simon, Sylvain |e VerfasserIn |4 aut | |
| 700 | 1 | |a Urban, Stephan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Klein, Florian |e VerfasserIn |4 aut | |
| 700 | 1 | |a Riddell, Stanley R. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Protzer, Ulrike |e VerfasserIn |4 aut | |
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