American Association for Cancer Research
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Figure S2 from Tumor-Associated Macrophages Promote Malignant Progression of Breast Phyllodes Tumors by Inducing Myofibroblast Differentiation

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journal contribution
posted on 2023-03-31, 00:49 authored by Yan Nie, Jianing Chen, Di Huang, Yandan Yao, Jiewen Chen, Lin Ding, Jiayi Zeng, Shicheng Su, Xue Chao, Fengxi Su, Herui Yao, Hai Hu, Erwei Song

TAMs induce myo�broblast differentiation and promote the growth and invasion of the PT cells via CCL18.


National Key R&D Program

Natural Science Foundation of China

Science Foundation of Guangdong Province

Guangzhou Science Technology and Innovation Commission

Guangdong Science and Technology Department

Translational Medicine Public Platform of Guangdong Province

Guangdong Department of Science & Technology Translational Medicine Center

Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes

Sun Yat-sen University

Doctoral Program of Higher Education

Guangzhou Science and Technology Bureau



Myofibroblast differentiation plays an important role in the malignant progression of phyllodes tumor, a fast-growing neoplasm derived from periductal stromal cells of the breast. Macrophages are frequently found in close proximity with myofibroblasts, but it is uncertain whether they are involved in the myofibroblast differentiation during phyllodes tumor progression. Here we show that increased density of tumor-associated macrophage (TAM) correlates with malignant progression of phyllodes tumor. We found that TAMs stimulated myofibroblast differentiation and promoted the proliferation and invasion of phyllodes tumor cells. Furthermore, we found that levels of the chemokine CCL18 in TAM was an independent prognostic factor of phyllodes tumor. Mechanistic investigations showed that CCL18 promoted expression of α-smooth muscle actin, a hallmark of myofibroblast, along with the proliferation and invasion of phyllodes tumor cells, and that CCL18-driven myofibroblast differentiation was mediated by an NF-κB/miR-21/PTEN/AKT signaling axis. In murine xenograft models of human phyllodes tumor, CCL18 accelerated tumor growth, induced myofibroblast differentiation, and promoted metastasis. Taken together, our findings indicated that TAM drives myofibroblast differentiation and malignant progression of phyllodes tumor through a CCL18-driven signaling cascade amenable to antibody disruption. Cancer Res; 77(13); 3605–18. ©2017 AACR.