Aryl Hydrocarbon Receptor Signaling Controls CD155 Expression on Macrophages and Mediates Tumor Immunosuppression.

Aryl Hydrocarbon Receptor Signaling Controls CD155 Expression on Macrophages and Mediates Tumor Immunosuppression.
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DOI:
10.4049/jimmunol.2000792
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发表时间:
2021-03-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Gromeier M
Gromeier M
中科院分区:
其他
文献类型:
--
作者:
McKay ZP;Brown MC;Gromeier M

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共刺激配体和共抑制配体之间的串扰是免疫细胞调节的突出节点。越来越多的证据表明,脊髓灰质炎病毒受体CD 155在抑制T细胞功能,特别是在癌症中发挥关键作用。然而,相对于其他已知的共刺激/共抑制配体(例如CD 86、CD 80、PD-L1),CD 155的生理功能和控制其表达的机制仍不清楚。我们发现,CD 155表达与肿瘤相关巨噬细胞(TAM)上的PD-L1共调节,受持续活性芳烃受体(AhR)的转录调节,并且可以通过体内AhR抑制靶向抑制。在免疫活性小鼠肿瘤模型中,AhR的治疗性抑制逆转了肿瘤免疫抑制,并且AhR活性标志物与人胶质母细胞瘤中的TAM标志物高度相关。因此,CD 155在更广泛的AhR控制的巨噬细胞活化表型中发挥作用,可以靶向逆转肿瘤免疫抑制。
Crosstalk between co-stimulatory and -inhibitory ligands are a prominent node of immune cell regulation. Mounting evidence points towards a critical role for CD155, the poliovirus receptor, in suppressing T cell function, particularly in cancer. However, relative to other known co-stimulatory/co-inhibitory ligands (e.g. CD86, CD80, PD-L1), the physiological functions of CD155 and the mechanisms controlling its expression remain unclear. We discovered that CD155 expression is co-regulated with PD-L1 on tumor-associated macrophages (TAMs), is transcriptionally regulated by persistently active Aryl hydrocarbon Receptor (AhR), and can be targeted for suppression via AhR inhibition in vivo. Therapeutic inhibition of AhR reversed tumor immunosuppression in an immune competent murine tumor model, and markers of AhR activity were highly correlated with TAM markers in human glioblastomas. Thus, CD155 functions within a broader, AhR-controlled macrophage activation phenotype that can be targeted to reverse tumor immunosuppression.
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