Abstract
The immune checkpoint receptor PD-1 on T follicular helper (Tfh) cells promotes Tfh:B cell interactions and appropriate positioning within tissues. Here, we examined the impact of regulation of PD-1 expression by the genomic organizer SATB1 on Tfh cell differentiation. Vaccination of CD4CreSatb1f/f mice enriched for antigen-specific Tfh cells, and TGF-β-mediated repression of SATB1 enhanced Tfh differentiation of human T cells. Mechanistically, high Icos expression in Satb1−/− CD4+ T cells promoted Tfh cell differentiation by preventing T follicular regulatory cell skewing and resulted in increased isotype-switched B cell responses in vivo. Ovarian tumors in CD4CreSatb1f/f mice accumulated tumor antigen-specific, LIGHT+CXCL13+IL-21+ Tfh cells and tertiary lymphoid structures (TLS). TLS formation decreased tumor growth in a CD4+ T cell and CXCL13-dependent manner. The transfer of Tfh cells, but not naive CD4+ T cells, induced TLS at tumor beds and decreased tumor growth. Thus, TGF-β-mediated silencing of Satb1 licenses Tfh cell differentiation, providing insight into the genesis of TLS within tumors.
Original language | English (US) |
---|---|
Pages (from-to) | 115-128.e9 |
Journal | Immunity |
Volume | 55 |
Issue number | 1 |
DOIs | |
State | Published - Jan 11 2022 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Immunology and Allergy
- Immunology
- Infectious Diseases
Keywords
- B cell cancer
- SATB1
- T follicular helper cell
- immuno-oncology
- tertiary lymphoid structure
- tumor immunology