Autocrine VEGF signalling on M2 macrophages regulates PD-L1 expression for immunomodulation of T cells.

ABSTRACT: M2-polarized macrophages, on one hand, can promote tumour vascularization by producing proangiogenic factors, such as vascular endothelial growth factor (VEGF). On the other hand, the expression of VEGF receptors (VEGFR) in this cell lineage was also reported. Although the function of VEGF/VEGFR axis plays a pivotal role in macrophages infiltration and angiogenesis, however, there is still lack of the direct evidence to show the role of VEGF as an autocrine operating in M2 macrophages, particularly for immunomodulation. In our study, we surprisingly discovered that M2 macrophages polarized by baicalin can simultaneously express VEGF and its receptors. Taking advantage of this unique culture system, we were able to investigate the biological activity of M2 macrophages in response to the aut

SUBMITTER: Lai YS 

PROVIDER: S-EPMC6349155 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature