免疫系统
FOXP3型
CD8型
细胞毒性T细胞
癌症研究
穿孔素
颗粒酶B
树突状细胞
肿瘤微环境
生物
医学
免疫学
生物化学
体外
作者
Xin Liu,Yifan Cao,Ruochen Li,Yong Gu,Yifan Chen,Yangyang Qi,Kunpeng Lv,Jieti Wang,Kuo-Tsong Yu,Chao Lin,Hao Líu,Heng Zhang,Hongyong He,Lingli Chen,Peipei Zhang,Zhenbin Shen,Jing Qin,Yihong Sun,He Li,Hua Huang,Weijuan Zhang,Jiejie Xu
标识
DOI:10.1016/j.ejca.2020.01.002
摘要
Abstract
Aim
Tumour-associated macrophages (TAMs) are prominent immune cells infiltrating in solid tumours with phenotypic and functional heterogeneity. However, the clinical significance of heterogeneous subtypes of TAMs in gastric cancer still remains obscure. Here, we aimed to explore the clinical significance of TAMs expressing dendritic cell–specific intercellular adhesion molecule 3–grabbing non-integrin (DC-SIGN) and its relevance with immune contexture in gastric cancer. Methods
We selected 453 formalin-fixed and paraffin-embedded samples and 51 fresh tissue specimens of patients with gastric cancer from Zhongshan Hospital. The association of DC-SIGN+ macrophages with clinicopathological parameters, overall survival (OS) and responsiveness to fluorouracil-based adjuvant chemotherapy (ACT) was inspected. Immunohistochemistry (IHC) and flow cytometry (FCM) were applied to characterize immune cells in gastric cancer. Results
We demonstrated that high intratumoral DC-SIGN+ macrophages infiltration predicted poor OS and inferior therapeutic responsiveness to fluorouracil-based ACT in patients with gastric cancer. Furthermore, higher infiltration of DC-SIGN+ macrophages indicated an increased number of Foxp3+ regulatory T cells (Tregs), CD8+ T cells and a higher ratio of Foxp3+/CD8+ within the tumour microenvironment (TME). In addition, CD8+ T cells in DC-SIGN+ macrophages high subgroup were functionally impaired, showing decreased interferon-γ (IFN-γ), granzyme B (GZMB) and perforin production yet elevated programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) expression. Conclusions
DC-SIGN+ macrophages were associated with immunoinvasive TME and indicated poor prognosis and inferior therapeutic responsiveness to fluorouracil-based ACT. DC-SIGN+ macrophages might be an independent prognosticator and a potential immunotherapeutic target for gastric cancer.
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