2022
DOI: 10.3390/ijms232113241
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Systemic CD4 Immunity and PD-L1/PD-1 Blockade Immunotherapy

Abstract: PD-L1/PD-1 blockade immunotherapy has changed the therapeutic approaches for the treatment of many cancers. Nevertheless, the mechanisms underlying its efficacy or treatment failure are still unclear. Proficient systemic immunity seems to be a prerequisite for efficacy, as recently shown in patients and in mouse models. It is widely accepted that expansion of anti-tumor CD8 T cell populations is principally responsible for anti-tumor responses. In contrast, the role of CD4 T cells has been less studied. Here w… Show more

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Cited by 10 publications
(10 citation statements)
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“…However, we have detected that CD4 + expression correlate with PD-L1 expression on immune cells and this could be a sign of a T cells-exhaustion [57]. It seems that exhausted T cells are not the aim of anti-PD-L1/PD-1 treatment [51].…”
Section: Discussionmentioning
confidence: 79%
See 1 more Smart Citation
“…However, we have detected that CD4 + expression correlate with PD-L1 expression on immune cells and this could be a sign of a T cells-exhaustion [57]. It seems that exhausted T cells are not the aim of anti-PD-L1/PD-1 treatment [51].…”
Section: Discussionmentioning
confidence: 79%
“…It is very important mainly when we take into consideration that almost 10% had diagnosed muscle-invasive disease (MIBC) during the rst recurrence. The unfavorable outcome in this group of NMIBC patients might be associated with TIL dysfunction caused by the lack of CD4 + cells in the tumor microenvironment, which play a key role in antitumor immunity [51]. This small frequency could be connected with some kind of poorly immunogenic cancer cell variants, while in the same tissue samples an immune in ltration was generally not large and only an abundance of CD20 + cells in ltration was found.…”
Section: Discussionmentioning
confidence: 81%
“…Tumor in ltration is usually regulated by T cells but also contains B cells, NK cells, DCs, macrophages, and neutrophils, which play an important role in the TME [41] . CD4 + T cells act as antitumor agents by regulating innate immunity, adaptive immunity, and immune detection [42] . In one study, T cell CD8 + subpopulation characteristics were identi ed by immunoassay as a prognostic marker for the recurrence of thyroid carcinoma [43] .…”
Section: Discussionmentioning
confidence: 99%
“…Tumor-infiltrating lymphocytes (TILs) are an important part of the TME and are related to the metabolism of tumor cells and the local immune response. The number of T lymphocyte subsets is considered to be not only closely related to the metastasis, progression, and growth of malignant tumors, but also related to immune dysfunction, a key factor affecting the effect of tumor immunotherapy [7][8][9]. T lymphocytes are mainly divided into different functional subsets: CD4 + T cells, effector (CD8 + ) T cells, and other types of cells such as natural killer T (NKT) cells.…”
Section: Introductionmentioning
confidence: 99%