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Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
Peripheral Helper T Cell Responses in Human Diseases.
1Department of Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Peripheral helper T (Tph) cells are crucial in rheumatoid arthritis and other diseases. These cells aid B cells and may drive inflammation through CXCL13 production and tertiary lymphoid structure formation.
Area of Science:
- Immunology
- Cell Biology
Background:
- Rheumatoid arthritis (RA) studies identified a unique CD4+ T-cell subset: peripheral helper T (Tph) cells.
- Tph cells are characterized by high PD-1 and low CXCR5 expression.
Purpose of the Study:
- To explore the role of Tph cells in RA pathogenesis and other human diseases.
- To investigate the contribution of Tph cells to B-cell responses and tertiary lymphoid structure (TLS) formation.
Main Methods:
- Analysis of T-cell subsets in human studies.
- Assessment of CXCL13 production by Tph cells.
- Evaluation of B-cell interactions and somatic hypermutation.
Main Results:
- Tph cells produce CXCL13, potentially promoting TLS in inflamed tissues.
- Tph cells provide B-cell help comparable to follicular helper T (Tfh) cells.
- Tph cell expansion is observed in various autoimmune diseases, infectious diseases, and cancers.
Conclusions:
- Tph cells play a significant role in the pathogenesis of RA and other immune-mediated conditions.
- Tph cells are implicated in B-cell expansion with atypical features and altered immune functions in peripheral tissues.
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