Neutrophils in the tumor microenvironment and their functional modulation by mesenchymal stromal cells

Neutrophils are the most predominant cell population in the innate immune system. The role of neutrophils in the initiation, development and metastasis of tumor has been actively studied in recent years. In cancer, neutrophils exert both pro- and anti-cancer effects, and their phenotype and function are affected by the tumor microenvironment (TME). This review aims to summarize the role of neutrophils in tumorigenesis with emphasis on their interaction with mesenchymal stromal cells (MSCs).