Fig. 3From: The evolution and heterogeneity of neutrophils in cancers: origins, subsets, functions, orchestrations and clinical applicationsThe multiple tumor-related inflammation pathways of TANs driving angiogenesis. TANs not only promote angiogenesis through angiopoietin, but also up-regulate the expression of Bv8, IL-8, and S100A8/A9 [104, 106, 107]. The secretion of MMP9 by TANs, in conjunction with a high NGAL expression in tumor cells, can confer a protective effect and promote angiogenesis via extracellular matrix (ECM) degeneration [98, 99]Back to article page