%0 Journal Article
%A Raue, Rebecca
%A Frank, Ann-Christin
%A Fuhrmann, Dominik C
%A de la Cruz-Ojeda, Patricia
%A Rösser, Silvia
%A Bauer, Rebekka
%A Cardamone, Giulia
%A Weigert, Andreas
%A Syed, Shahzad Nawaz
%A Schmid, Tobias
%A Brüne, Bernhard
%T MicroRNA-200c Attenuates the Tumor-Infiltrating Capacity of Macrophages.
%D 2022
%@ 2079-7737
%U http://hdl.handle.net/10668/20800
%X Macrophages constitute a major part of the tumor-infiltrating immune cells. Within the tumor microenvironment, they acquire an alternatively activated, tumor-supporting phenotype. Factors released by tumor cells are crucial for the recruitment of tumor-associated macrophages. In the present project, we aimed to understand the role of hsa-miR-200c-3p (miR-200c) in the interplay between tumor cells and macrophages. To this end, we employed a coculture system of MCF7 breast tumor cells and primary human macrophages and observed the transfer of miR-200c from apoptotic tumor cells to macrophages, which required intact CD36 receptor in macrophages. We further comprehensively determined miR-200c targets in macrophages by mRNA-sequencing and identified numerous migration-associated mRNAs to be downregulated by miR-200c. Consequently, miR-200c attenuated macrophage infiltration into 3-dimensional tumor spheroids. miR-200c-mediated reduction in infiltration further correlated with a miR-200c migration signature comprised of the four miR-200c-repressed, predicted targets PPM1F, RAB11FIB2, RDX, and MSN.
%K breast tumor
%K macrophage
%K miR
%K tumor microenvironment
%~