Synchronous Germinal Center Onset Impacts the Efficiency of Antibody Responses
Overview
Affiliations
The germinal center reaction is an important target for modulating antibody responses. Antibody production from germinal centers is regulated by a negative feedback mechanism termed antibody feedback. By imposing antibody feedback, germinal centers can interact and regulate the output of other germinal centers. Using an agent-based model of the germinal center reaction, we studied the impact of antibody feedback on kinetics and efficiency of a germinal center. Our simulations predict that high feedback of antibodies from germinal centers reduces the production of plasma cells and subsequently the efficiency of the germinal center reaction by promoting earlier termination. Affinity maturation is only weakly improved by increased antibody feedback and ultimately interrupted because of premature termination of the reaction. The model predicts that the asynchronous onset and changes in number of germinal centers could alter the efficiency of antibody response due to changes in feedback by soluble antibodies. Consequently, late initialized germinal centers have a compromised output due to higher antibody feedback from the germinal centers formed earlier. The results demonstrate potential effects of germinal center intercommunication and highlight the importance of understanding germinal center interactions for optimizing the antibody response, in particular, in the elderly and in the context of vaccination.
Maturation of germinal center B cells after influenza virus vaccination in humans.
McIntire K, Meng H, Lin T, Kim W, Moore N, Han J J Exp Med. 2024; 221(8).
PMID: 38935072 PMC: 11211068. DOI: 10.1084/jem.20240668.
High affinity mAb infusion can enhance maximum affinity maturation during HIV Env immunization.
Thomas P, Rees-Spear C, Griffith S, Muir L, Touizer E, Andrabi R iScience. 2024; 27(4):109495.
PMID: 38550978 PMC: 10973984. DOI: 10.1016/j.isci.2024.109495.
Soluble ACE2 correlates with severe COVID-19 and can impair antibody responses.
Lebedin M, Ratswohl C, Garg A, Schips M, Garcia C, Spatt L iScience. 2024; 27(3):109330.
PMID: 38496296 PMC: 10940809. DOI: 10.1016/j.isci.2024.109330.
Convergent evolution and B-cell recirculation in germinal centers in a human lymph node.
Pelissier A, Stratigopoulou M, Donner N, Dimitriadis E, Bende R, Guikema J Life Sci Alliance. 2023; 6(11).
PMID: 37640448 PMC: 10462906. DOI: 10.26508/lsa.202301959.
Spatial dysregulation of T follicular helper cells impairs vaccine responses in aging.
Silva-Cayetano A, Fra-Bido S, Robert P, Innocentin S, Burton A, Watson E Nat Immunol. 2023; 24(7):1124-1137.
PMID: 37217705 PMC: 10307630. DOI: 10.1038/s41590-023-01519-9.