EFB Dengue Literature Review

ZEB2

3 min read

ZEB2

Overview

ZEB2 (Zinc finger E-box-binding homeobox 2) is a transcriptional regulator induced by T-bet. In CD8⁺ T cells, ZEB2 cooperates with T-bet to programme terminal effector differentiation through repression of TCF7 (a central memory fate TF). In B cells, ZEB2 is co-expressed with T-bet in DN2 and aNAV cells, and its high expression — paired with absence of TCF7 — distinguishes the EF effector programme from the central memory-like programme of DN1/SWM cells.

Key Points from Literature

  • Highly expressed in DN2 cells: ZEB2 RNA expression is highest in DN2 cells, paralleling TBX21 (T-bet). Both are elevated above NAV, SWM, and DN1 cells (see Jenks2018 - DN2 B Cells and EF Pathway in SLE, RNA-seq).

  • T-bet/ZEB2 cooperation model: T-bet and ZEB2 cooperate to promote effector cell differentiation through inhibition of TCF7. DN2 cells express high T-bet/ZEB2 and lack TCF7; DN1/SWM cells express TCF7 and lack T-bet/ZEB2. This dichotomy suggests DN2 and DN1 belong in distinct differentiation pathways (see Jenks2018 - DN2 B Cells and EF Pathway in SLE, citing Dominguez et al. 2015 for T cell parallel).

  • ZEB1 distinction: ZEB1, a related zinc finger TF, is uniquely low in DN2 cells. ZEB1 binding motifs are enriched in genes with low DN2 expression (CXCR5, CD21, TRAF5), suggesting ZEB1 loss contributes to the DN2 phenotype (see Jenks2018 - DN2 B Cells and EF Pathway in SLE).

  • ZEB2 is the primary transcriptional driver of ABC formation: Targeted in vitro manipulation of 16 candidate TFs identified Zeb2 as the primary inducer of ABC in both mice and humans. B cell-intrinsic Zeb2 deficiency abolishes the ABC transcriptional signature (including T-bet, CD11c, Zbtb32) and the proinflammatory functions and autoimmune pathology in TLR7-driven lupus. Zeb2 haploinsufficiency in humans also reduces ABC numbers (see Sanz2025 - Human Atypical B Cells Overview, review citing Dai et al. 2024).

  • ZEB2 represses Mef2b to block GC entry: Zeb2 represses Mef2b, a TF required for GC differentiation. This provides the first direct molecular mechanism linking EF commitment to GC exclusion: high ZEB2 in aNAV/DN2 cells actively prevents GC entry. Together with the GC-independent nature of autoimmunity in TLR7 gain-of-function mice, this establishes the molecular basis for EF/GC antagonism (see Sanz2025 - Human Atypical B Cells Overview, review citing Dai et al. 2024).

  • ZEB2 can drive ABC independently of T-bet: The identification of ZEB2 as a primary driver upstream of T-bet is consistent with observations that CD11c⁺ ABC can be generated and maintained without T-bet. ZEB2 is required for T-bet expression in ABC, but may also promote ABC features through T-bet-independent mechanisms (see Sanz2025 - Human Atypical B Cells Overview).

Contradictions & Debates

None documented in current wiki sources.

T-bet, DN2 B Cell, Activated Naive B Cell, Extrafollicular Response, Germinal Center

Sources

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