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Memory B cell subsets have divergent developmental origins that are coupled to distinct imprinted epigenetic states.
Callahan, Derrick; Smita, Shuchi; Joachim, Stephen; Hoehn, Kenneth; Kleinstein, Steven; Weisel, Florian; Chikina, Maria; Shlomchik, Mark.
Affiliation
  • Callahan D; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
  • Smita S; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
  • Joachim S; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
  • Hoehn K; Department of Pathology, Yale School of Medicine, New Haven, CT, USA.
  • Kleinstein S; Department of Pathology, Yale School of Medicine, New Haven, CT, USA.
  • Weisel F; Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT, USA.
  • Chikina M; Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA.
  • Shlomchik M; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Nat Immunol ; 25(3): 562-575, 2024 Mar.
Article in En | MEDLINE | ID: mdl-38200277
ABSTRACT
Memory B cells (MBCs) are phenotypically and functionally diverse, but their developmental origins remain undefined. Murine MBCs can be divided into subsets by expression of CD80 and PD-L2. Upon re-immunization, CD80/PD-L2 double-negative (DN) MBCs spawn germinal center B cells (GCBCs), whereas CD80/PD-L2 double-positive (DP) MBCs generate plasmablasts but not GCBCs. Using multiple approaches, including generation of an inducible GCBC-lineage reporter mouse, we demonstrate in a T cell-dependent response that DN cells formed independently of the germinal center (GC), whereas DP cells exhibited either extrafollicular (DPEX) or GCBC (DPGC) origins. Chromatin and transcriptional profiling revealed similarity of DN cells with an early memory precursor. Reciprocally, GCBC-derived DP cells shared distinct genomic features with GCBCs, while DPEX cells had hybrid features. Upon restimulation, DPEX cells were more prone to divide, while DPGC cells differentiated toward IgG1+ plasmablasts. Thus, MBC functional diversity is generated through distinct developmental histories, which imprint characteristic epigenetic patterns onto their progeny, thereby programming them for divergent functional responses.
Subject(s)

Full text: 1 Database: MEDLINE Main subject: B-Lymphocyte Subsets Limits: Animals Language: En Journal: Nat Immunol Journal subject: ALERGIA E IMUNOLOGIA Year: 2024 Type: Article Affiliation country: United States

Full text: 1 Database: MEDLINE Main subject: B-Lymphocyte Subsets Limits: Animals Language: En Journal: Nat Immunol Journal subject: ALERGIA E IMUNOLOGIA Year: 2024 Type: Article Affiliation country: United States