Neutrophils are known as first responders to threatening infections and feature prominently in the microenvironment of tumors to resist cancer progression. Though neutrophils have been linked to the growth of multiple cancers, such as lung and breast, these cells can assume multiple functional states.
In a new study published in Cancer Cell titled, “ CCL3 is produced by aged neutrophils across cancers and promotes tumor growth,” researchers from Ludwig Institute for Cancer Research in Lausanne have discovered a gene expression program executed by tumor-associated neutrophils (TANs) and a corresponding biomarker that uniformly support cancer cell survival and tumor progression across human and murine tumors.
Results demonstrate that TANs characterized by this conserved genetic program are a central variable of the tumor microenvironment (TME) linked to cancer progression. The authors also identify an associated marker, CCL3, as key to supporting cancer growth.









