2022
DOI: 10.3389/fimmu.2022.740588
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FOXP3/HAT1 Axis Controls Treg Infiltration in the Tumor Microenvironment by Inducing CCR4 Expression in Breast Cancer

Abstract: Infiltrating T-regulatory cells in the tumor microenvironment is a key impediment to immunotherapy and is linked to a poor prognosis. We found that tumor-infiltrating Tregs express a higher expression of the chemokine receptor CCR4 than peripheral Tregs in breast cancer patients. CCL22 and CCL17 are released by tumor cells and tumor-associated macrophages, attracting CCR4+ Tregs to the tumor site. The Treg lineage-specific transcription factor FOXP3 changes the CCR4 promoter epigenetically in conjunction with … Show more

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Cited by 30 publications
(25 citation statements)
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“…It has been shown that inhibition of CCR4 signaling diminishes Treg infiltration of the TME while Treg numbers are maintained in the periphery (54). Furthermore, depleting CCR4 + Tregs seems to reduce the tumor burden both as a standalone therapy and in combination with checkpoint blockade in certain tumor settings (54,(56)(57)(58)(59)(60). Despite the potential of targeting CCR4 for immunotherapies, exact role of CCR4 in Treg development, function and tumor-Treg crosstalk remains elusive (61).…”
Section: Migration and Homing Of Tregs To Tumor Sitementioning
confidence: 99%
“…It has been shown that inhibition of CCR4 signaling diminishes Treg infiltration of the TME while Treg numbers are maintained in the periphery (54). Furthermore, depleting CCR4 + Tregs seems to reduce the tumor burden both as a standalone therapy and in combination with checkpoint blockade in certain tumor settings (54,(56)(57)(58)(59)(60). Despite the potential of targeting CCR4 for immunotherapies, exact role of CCR4 in Treg development, function and tumor-Treg crosstalk remains elusive (61).…”
Section: Migration and Homing Of Tregs To Tumor Sitementioning
confidence: 99%
“…Tumor-in ltrating Tregs express higher chemokine receptor CCR4 than peripheral Tregs in BRCA patients according to studies. At the same time, FoxP3, as a CCR4 transcription activator , can increase CCR4 expression in Tregs and promote of BRCA immune escape [37]. In addition, Tregs can reduce CD80/CD86 expression of APCs via CTLA-4dependent autophagy, thereby inhibiting the T-cell stimulating activity of APCs.…”
Section: Discussionmentioning
confidence: 99%
“…It can be assumed that infiltration of CCL20 into the TME from the blood compartment could play a vital role in tumor eradication, thereby affecting the prognosis. CCL17 is known to be released by tumor cells and tumor-associated macrophages, and promotes tumor development [ 19 ]. However, levels of CCL17 may represent a marker of interest to study in HNC, as increased serum levels have been shown to be associated with longer survival in melanoma patients with metastasis [ 20 ].…”
Section: Discussionmentioning
confidence: 99%