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@ARTICLE{Nadella:141138,
author = {V. Nadella and S. Singh and A. Jain and M. Jain and K. M.
Vasquez and A. Sharma and P. Tanwar and G. K. Rath and H.
Prakash$^*$},
title = {{L}ow dose radiation primed i{NOS} + {M}1macrophages
modulate angiogenic programming of tumor derived
endothelium.},
journal = {Molecular carcinogenesis},
volume = {57},
number = {11},
issn = {0899-1987},
address = {New York, NY},
publisher = {Wiley Interscience},
reportid = {DKFZ-2018-01669},
pages = {1664 - 1671},
year = {2018},
abstract = {Solid tumors are covered by stroma, which is hypoxic in
nature and composed of various non-malignant components such
as endothelial cells, fibroblasts, and pericytes that
support tumor growth. Tumor stroma represents a mechanical
barrier for tumor infiltration of CD8+ effector T cells in
particular. In this context, our previous studies have
demonstrated the therapeutic impact of Low-Dose Radiation
(LDR)-primed and M1-retuned (iNOS+) peritumoral macrophages
that produce inducible nitric oxide, have immunological
roles on tumor infiltration of effector T cells,
cancer-related inflammation, and subsequent tumor immune
rejection in a mouse model of pancreatic cancer. These
findings suggested a possible modification of tumor
endothelium by LDR-primed macrophages. In line with these
observations, here we demonstrate the influence of LDR in
down-modulating HIF-1 in irradiated tumors in the course of
polarization of irradiated tumor-associated macrophages
toward an M1 phenotype. Furthermore, we demonstrate that M1
macrophages which are primed by LDR can directly influence
angiogenic responses in eNOS+ endothelial cells which
produce nitric oxide having both vascular and physiological
roles. Furthermore, we demonstrate that naïve macrophages,
upon differentiating to an M1 phenotype either by Th1
stimuli or LDR, potentially modify
sphingosine-1-phosphate/VEGF-induced angiogenic signaling in
tumor-derived endothelial cells with tumorigenic potential,
thus indicating the significance of iNOS+ macrophages in
modulating signaling in eNOS+ tumor-derived endothelium. Our
study suggests that iNOS+ macrophages can activate tumor
endothelium which may contribute to cancer-directed
immunotherapy in particular.},
cin = {D015},
ddc = {610},
cid = {I:(DE-He78)D015-20160331},
pnm = {314 - Tumor immunology (POF3-314)},
pid = {G:(DE-HGF)POF3-314},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30035346},
doi = {10.1002/mc.22879},
url = {https://inrepo02.dkfz.de/record/141138},
}