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- W2381330374 abstract "Malignant gliomas are the most common tumors in the central nervous system with a poor prognosis. Recently, CD4+ cytotoxic T cells (CTLs) are being increasingly recognized as possessing antitumor capacity. However, their presence, activity and regulation in glioma have not been investigated in detail.To examine this, 72 grade II and grade III Han Chinese glioma patients and 30 Han Chinese healthy controls were investigated.We found that compared to healthy controls, glioma patients had significantly upregulated frequencies of circulating CD4+ CTLs, identified by the expression of granzyme A (GzmA), granzyme B (GzmB) and/or perforin. The stimulated CD4+ CTLs in grade II and grade III glioma patients also had less proliferative ability than those in healthy controls, a feature of suppression that progressed with tumor grade. The frequencies of GzmB-expressing circulating CD4+ CTLs were directly associated with prognosis. We hypothesized that the programed death 1 (PD-1)/PD-ligand 1 (L1) interaction possibly contributed to the suppression of CD4+ CTLs in grade II and grade III glioma, since an upregulation of PD-1 was observed on CD4+ CTLs in glioma compared to those in the healthy individuals. Blockade of the PD-1/PD-L1 interaction with neutralizing antibodies significantly increased the proliferation and granzyme or perforin production by CD4+ CTLs in grade II and grade III glioma patients.These data suggest that the CD4+ CTLs in grade II and grade III glioma patients contribute to antitumor immunity and could be suppressed by PD-1 signal transduction." @default.
- W2381330374 created "2016-06-24" @default.
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- W2381330374 date "2016-05-12" @default.
- W2381330374 modified "2023-10-14" @default.
- W2381330374 title "Cytotoxic CD4<sup>+</sup>T cells are correlated with better prognosis in Han Chinese grade II and grade III glioma subjects and are suppressed by PD-1 signaling" @default.
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- W2381330374 doi "https://doi.org/10.1080/00207454.2016.1180597" @default.
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