The prognostic significance of carcinoma-associated fibroblasts and tumor-associated macrophages in nasopharyngeal carcinoma
Authors Yu Y, Ke L, Lv X, Ling Y, Lu J, Liang H, Qiu W, Huang X, Liu G, Li W, Guo X, Xia W, Xiang Y
Received 2 March 2018
Accepted for publication 9 April 2018
Published 9 July 2018 Volume 2018:10 Pages 1935—1946
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Professor Lu-Zhe Sun
Yahui Yu,1–3,* Liangru Ke,1,4,* Xing Lv,1,2 Yi hong Ling,1,5 Jiabin Lu,1,5 Hu Liang,1,2 Wenze Qiu,1,2 Xinjun Huang,1,2 Guoying Liu,1,2 Wangzhong Li,1,2 Xiang Guo,1,2 Weixiong Xia,1,2 Yanqun Xiang1,2
1Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, Guangdong, People’s Republic of China; 2Department of Nasopharyngeal Carcinoma, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, People’s Republic of China; 3Department of Radiation Oncology, Oncology Center, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China; 4Department of Diagnostic Radiology, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, People’s Republic of China; 5Department of Pathology, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, People’s Republic of China
*These authors contributed equally to this work
Purpose: Tumor stroma cells play an important role in the carcinogenesis and progression of cancer. The aim of the present investigation was to explore the predictive role of carcinoma-associated fibroblasts (CAFs) and tumor-associated macrophages (TAMs) in nasopharyngeal carcinoma (NPC).
Patients and methods: The densities of CAFs and TAMs were measured by immunohistochemistry staining for α-smooth muscle actin (α-SMA), CD68, and CD163 in two sets of tissue microarrays including 260 pretreatment NPC tissues, that is, a training test comprising of 152 patients and a validation set comprising of 108 patients. Chi-square tests were performed for comparisons among the groups. Survival rates were estimated by using the Kaplan–Meier method and compared with log-rank tests. Cox proportional hazards models were used to identify significant independent variables.
Results: Patients older than 50 years showed a lower expression of CD68, and there was a positive relationship between the densities of CAFs and CD163+ TAMs (p=0.001). In the multivariate analysis of the training test, both α-SMA and CD163 were independent prognostic factors for overall survival and progression-free survival (all p<0.05). Based on the expression levels of α-SMA and CD163, patients were categorized into three groups: high-risk, intermediate-risk, and low-risk groups according to both high, either high, and both low, respectively. Survival analysis and Cox multivariate analysis showed that the risk groups based on α-SMA and CD163 expression were independent predictors for the survival of patients with NPC in the training test, which was also confirmed by the validation test.
Conclusion: A patient’s risk group based on the level of CD163+ TAMs and CAFs was an independent predictor of survival, which may facilitate patient counseling and individualized treatment.
Keywords: CD68, CD163, α-SMA, risk groups, multivariate analysis
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