Tumor rejection by local interferon gamma induction in established tumors is associated with blood vessel destruction and necrosis

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Item Type:	Article
Title:	Tumor rejection by local interferon gamma induction in established tumors is associated with blood vessel destruction and necrosis
Creators Name:	Briesemeister, D., Sommermeyer, D., Loddenkemper, C., Loew, R., Uckert, W., Blankenstein, T. and Kammertoens, T.
Abstract:	It has been shown that injecting a suspension of IFN-gamma-secreting tumor cells results in their rejection. This effect has been attributed to IFN-gamma preventing tumor stroma formation but not to a direct effect on the cancer cells. However, it is not known, which influence IFN-gamma has on tumors with an established stroma. To address this question, the plasmacytoma cell line J558L was transduced with a vector allowing doxycycline-inducible IFN-gamma gene expression. After the injection of the tumor cells into mice, IFN-gamma was induced at different time points. Tumors did not grow when inducing IFN-gamma immediately after tumor cell inoculation, while approximately half of the tumors were rejected when IFN-gamma was induced in early established tumors within 2 weeks. Induction of IFN-gamma 2-3 weeks after tumor cell inoculation was less efficient (0-17% rejection). IFN-gamma induction in established tumors led to a reduction of CD146(+) endothelial cells and massive necrosis. Together, we show that vascularized tumors can be rejected by local IFN-gamma expression, but that rejection of established tumors was less efficient over time. This suggests that transplanted tumors became less susceptible to local IFN-gamma treatment the better they are established.
Keywords:	Interferon gamma, Tumor Microenvironment, Established Tumors, Animals, Mice
Source:	International Journal of Cancer
ISSN:	0020-7136
Publisher:	Wiley
Volume:	128
Number:	2
Page Range:	371-378
Date:	15 January 2011
Official Publication:	https://doi.org/10.1002/ijc.25350
PubMed:	View item in PubMed

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