ICAMs support B cell interactions with T follicular helper cells and promote clonal selection.

Zaretsky, Irina; Atrakchi, Ofir; Mazor, Roei D; Stoler-Barak, Liat; Biram, Adi; Feigelson, Sara W; Gitlin, Alexander D; Engelhardt, Britta; Shulman, Ziv (2017). ICAMs support B cell interactions with T follicular helper cells and promote clonal selection. The Journal of experimental medicine, 214(11), pp. 3435-3448. Rockefeller Univ. Press 10.1084/jem.20171129

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The germinal center (GC) reaction begins with a diverse and expanded group of B cell clones bearing a wide range of antibody affinities. During GC colonization, B cells engage in long-lasting interactions with T follicular helper (Tfh) cells, a process that depends on antigen uptake and antigen presentation to the Tfh cells. How long-lasting T-B interactions and B cell clonal expansion are regulated by antigen presentation remains unclear. Here, we use in vivo B cell competition models and intravital imaging to examine the adhesive mechanisms governing B cell selection for GC colonization. We find that intercellular adhesion molecule 1 (ICAM-1) and ICAM-2 on B cells are essential for long-lasting cognate Tfh-B cell interactions and efficient selection of low-affinity B cell clones for proliferative clonal expansion. Thus, B cell ICAMs promote efficient antibody immune response by enhancement of T cell help to cognate B cells.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Theodor Kocher Institute

UniBE Contributor:

Engelhardt, Britta

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1540-9538

Publisher:

Rockefeller Univ. Press

Language:

English

Submitter:

Ursula Zingg-Zünd

Date Deposited:

22 Mar 2018 15:49

Last Modified:

07 May 2018 02:30

Publisher DOI:

10.1084/jem.20171129

PubMed ID:

28939548

BORIS DOI:

10.7892/boris.111256

URI:

https://boris.unibe.ch/id/eprint/111256

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