IL6 derived from cancer-associated fibroblasts promotes chemoresistance via CXCR7 in esophageal squamous cell carcinoma

Y. Qiao, C. Zhang, A. Li, D. Wang, Z. Luo, Y. Ping, B. Zhou, S. Liu, H. Li, D. Yue, Z. Zhang, X. Chen, Z. Shen, J. Lian, Y. Li, S. Wang, F. Li, L. Huang, L. Wang, B. ZhangJ. Yu, Z. Qin, Y. Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Various factors and cellular components in the tumor microenvironment are key drivers associated with drug resistance in many cancers. Here, we analyzed the factors and molecular mechanisms involved in chemoresistance in patients with esophageal squamous cell carcinoma (ESCC). We found that interleukin 6 (IL6) derived mainly from cancer-associated fibroblasts played the most important role in chemoresistance by upregulating C-X-C motif chemokine receptor 7 (CXCR7) expression through signal transducer and activator of transcription 3/nuclear factor-κB pathway. CXCR7 knockdown resulted in the inhibition of IL6-induced proliferation and chemoresistance. In addition, CXCR7 silencing significantly decreased gene expression associated with stemness, chemoresistance and epithelial-mesenchymal transition and suppressed the proliferation ability of ESCC cells in three-dimensional culture systems and angiogenesis assay. In clinical samples, ESCC patients with high expression of CXCR7 and IL6 presented a significantly worse overall survival and progression-free survival upon receiving cisplatin after operation. These results suggest that the IL6-CXCR7 axis may provide a promising target for the treatment of ESCC.

Original languageEnglish (US)
Pages (from-to)873-883
Number of pages11
JournalOncogene
Volume37
Issue number7
DOIs
StatePublished - Feb 15 2018

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

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