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Sutton HJ, Gao X, Kelly HG, Parker BJ, Lofgren M, Dacon C, Chatterjee D, Seder RA, Tan J, Idris AH, Neeman T, Cockburn IA. Lack of affinity signature for germinal center cells that have initiated plasma cell differentiation. Immunity 2024; 57:245-255.e5. [PMID: 38228150 PMCID: PMC10922795 DOI: 10.1016/j.immuni.2023.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 09/08/2023] [Accepted: 12/13/2023] [Indexed: 01/18/2024]
Abstract
Long-lived plasma cells (PCs) secrete antibodies that can provide sustained immunity against infection. High-affinity cells are proposed to preferentially select into this compartment, potentiating the immune response. We used single-cell RNA-seq to track the germinal center (GC) development of Ighg2A10 B cells, specific for the Plasmodium falciparum circumsporozoite protein (PfCSP). Following immunization with Plasmodium sporozoites, we identified 3 populations of cells in the GC light zone (LZ). One LZ population expressed a gene signature associated with the initiation of PC differentiation and readily formed PCs in vitro. The estimated affinity of these pre-PC B cells was indistinguishable from that of LZ cells that remained in the GC. This remained true when high- or low-avidity recombinant PfCSP proteins were used as immunogens. These findings suggest that the initiation of PC development occurs via an affinity-independent process.
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Affiliation(s)
- Henry J Sutton
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, The Australian National University, Canberra, ACT 2601, Australia
| | - Xin Gao
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, The Australian National University, Canberra, ACT 2601, Australia
| | - Hannah G Kelly
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, The Australian National University, Canberra, ACT 2601, Australia
| | - Brian J Parker
- Biological Data Science Institute, The Australian National University, Canberra, ACT 2601, Australia; School of Computing, ANU College of Engineering, Computing & Cybernetics, The Australian National University, Canberra, ACT 2601, Australia
| | - Mariah Lofgren
- Malaria Unit, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Cherrelle Dacon
- Antibody Biology Unit, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852, USA
| | - Deepyan Chatterjee
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, The Australian National University, Canberra, ACT 2601, Australia
| | - Robert A Seder
- Malaria Unit, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Joshua Tan
- Antibody Biology Unit, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852, USA
| | - Azza H Idris
- Malaria Unit, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA; Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02139, USA; Department of Pediatrics, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Teresa Neeman
- Biological Data Science Institute, The Australian National University, Canberra, ACT 2601, Australia
| | - Ian A Cockburn
- Division of Immunology and Infectious Disease, John Curtin School of Medical Research, The Australian National University, Canberra, ACT 2601, Australia.
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Flowers EM, Eisenbarth SC. In a wild germinal center, what determines survival of the fittest? Sci Immunol 2024; 9:eadn7535. [PMID: 38181096 DOI: 10.1126/sciimmunol.adn7535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 12/26/2023] [Indexed: 01/07/2024]
Abstract
Mice with natural BCR frequencies have plasma cells enriched for high-affinity clones, but high-affinity clones persist in the germinal center, leaving the rules for plasma cell selection still murky.
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Affiliation(s)
- Emily M Flowers
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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