Extrafollicular Tph2–CD11c+CD21- B cell interactions orchestrate immune dysregulation in IgG4-related disease

Q: What does this research mean for the field?

The Tph2-CD11c+CD21- B cell axis drives extrafollicular immune dysregulation in IgG4-related disease. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

Hiroshi Sakamoto; Ryuta Kamekura; Shin Takayanagi; Akihisa Tanaka; Ryoto Yajima; Keisuke Yamamoto; Tsuyoshi Okuni; Makoto Kurose; Motohisa Yamamoto; Hiroki Takahashi; Shingo Ichimiya; Kenichi Takano

doi:10.1016/j.alit.2026.01.005

February 1, 2026Allergology InternationalOpen Access

Extrafollicular Tph2–CD11c+CD21- B cell interactions orchestrate immune dysregulation in IgG4-related disease

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Key Points

The research aims to explore how Tph2-CD11c+CD21- B cell interactions contribute to immune dysregulation in IgG4-related disease.
Identified Tph2 and CD11c+CD21- B cell interactions
Analyzed the role of these cells in humoral activation
Evaluated their association with IgG4 production
Established a link between Tph2 cells and IgG4-related disease severity
Demonstrated that CD11c+CD21- B cells are significant IgG4 producers
Proposed targeting this axis as a therapeutic approach

Implication

Identifies Tph2-CD11c+CD21- B cell interactions that drive immune dysregulation in IgG4-related disease, suggesting new therapeutic avenues.

Abstract

This study identifies a novel Tph2-CD11c⁺CD21⁻ B cell axis driving extrafollicular immune dysregulation in IgG4-RD. Tph2 cells link humoral activation with cytotoxicity, and CD11c⁺CD21⁻ B cells serve as producers of IgG4 associated with disease severity. Targeting this axis may provide therapeutic strategies for refractory or relapsing IgG4-RD beyond glucocorticoids.

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Cite This Study

Sakamoto et al. (2026) studied this question.

synapsesocial.com/papers/699d3f9ede8e28729cf64373 https://doi.org/10.1016/j.alit.2026.01.005

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Extrafollicular Tph2–CD11c+CD21- B cell interactions orchestrate immune dysregulation in IgG4-related disease

Key Points

Implication

Abstract

Discussion

Cite This Study

Extrafollicular Tph2–CD11c+CD21- B cell interactions orchestrate immune dysregulation in IgG4-related disease

Key Points

Implication

Abstract

Discussion

Cite This Study

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