Abstract:
:Based on CD25 expression, T follicular helper cells (Tfh) could be divided into T follicular regulatory (Tfr)-like subset (CD25+CD4+CXCR5+) and CD25- Tfh subset (CD25-CD4+CXCR5+). Patients with diffuse large B cell lymphoma (DLBCL) display high level of Tfr-like cells in blood and tumor. This Tfr-like subset could suppress CD8 T cell response while promote tumor cell proliferation. In this study, we investigated the transcription factors and regulatory elements associated with Tfr-like cells in DLBCL patients. Both circulating and tumor-infiltrating Tfr-like cells presented slightly higher Blimp-1 expression and significantly higher Foxp3 expression than the CD25- Tfh subset. As the IL-2 receptor, CD25 could be moderately upregulated in stimulated CD25- Tfh cells. However, stimulated CD25- Tfh cells could not upregulate Foxp3, indicating that the distinction between Foxp3-low CD25-CXCR5+CD4+ T cells and Foxp3-high CD25+CXCR5+CD4+ T cells was not due to differences in stimulation status. Regarding cytokine production, while both Tfr-like and CD25- Tfh cells upregulated IL-21 and IL-10 during stimulation, the CD25- Tfh cells presented significantly higher IL-21 and lower IL-10 expression than the Tfr-like cells, and the TGF-β expression was only increased in Tfr-like cells. Interestingly, IL-21 secreted from CD25- Tfh cells negatively regulated the expression of Foxp3 and IL-10 of autologous Tfr-like cells. Together, these results demonstrated that the Tfr-like and CD25- Tfh subsets of circulating Tfh cells presented different functions and should be investigated separately.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Ma X,Zha J,He J,Chen L,Huang J,Wu W,Tian P,Qian BH,Yu L,Jiang Y,Xu Bdoi
10.1016/j.humimm.2020.05.008subject
Has Abstractpub_date
2020-08-01 00:00:00pages
452-459issue
8eissn
0198-8859issn
1879-1166pii
S0198-8859(20)30320-7journal_volume
81pub_type
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