Tumor-educated Neutrophils Induce Epithelial-mesenchymal Transition and Metastasis in Colorectal Cancer Through Interleukin-17a Secretion

The role of neutrophils in defending against infections and regulating immune responses is well-known. In cancer, tumor-associated neutrophils also play a significant role in the progression of tumors. However, the specific mechanisms of their interaction with human colorectal tumors have not been fully elucidated. Our study found that tumor-educated neutrophils can activate the STAT3 signaling pathway in colorectal cancer cells by secreting IL-17a. This leads to increased migration and invasion of colorectal cancer cells, promoting tumor growth by triggering epithelial-to-mesenchymal transition (EMT). These findings suggest that IL-17a secreted by tumor-educated neutrophils contributes to the development of colorectal cancer through the IL-17a/STAT3 signaling pathway. This provides new insights for potential treatments for colorectal cancer.