IL-12 suppresses vascular endothelial growth factor receptor 3 expression on tumor vessels by two distinct IFN-gamma-dependent mechanisms.
IL-12 suppresses vascular endothelial growth factor receptor 3 expression on tumor vessels by two distinct IFN-gamma-dependent mechanisms.
复制标题
DOI:
10.4049/jimmunol.0903210
复制
发表时间:
2010-02-15
期刊:
影响因子:
--
通讯作者:
Lord EM
中科院分区:
文献类型:
--
作者:
Sorensen EW;Gerber SA;Frelinger JG;Lord EM
IL-12 has been shown to be effective in enhancing antitumor responses. However, how IL-12 exerts its antiangiogenic effect is largely unknown. In this study, we elucidate this mechanism using B16 transfected to express IL-12 (B16/IL-12), a system that provides constant, local production of IL-12 within the tumor microenvironment. Intratumoral IL-12 resulted in a significant delay in tumor growth and phenotypic changes in the vasculature. Vessels found within B16 tumors are chaotic and poorly formed and express vascular endothelial growth factor receptor 3 (VEGFR3), a growth factor receptor not expressed on normal adult vessels. However, the vessels within B16/IL-12 tumors have a more normal morphology and do not express VEGFR3. We have shown that IFN-γ is required for IL-12 to suppress the aberrant expression of VEGFR3. Indeed, the presence of intratumoral IL-12 stimulates the immune system resulting in more IFN-γ–producing tumor-infiltrating lymphocytes per tumor when compared with parental B16 tumors, which may have a marked effect on control of tumor growth. Interestingly, within B16/IL-12 tumors, T cells are necessary to suppress VEGFR3 expression on tumor vessels. Finally, using IFN-γ receptor knockout mice in a bone marrow chimera system, we show that the IFN-γ produced within the tumor suppresses VEGFR3 expression in two ways: 1) acting directly on tumor vessel endothelial cells, and 2) acting on the tumor-infiltrating lymphocytes to indirectly alter endothelial cells’ VEGFR3 expression. Our data indicate a mechanism in which tumor-infiltrating immune cells regulate tumor vessel phenotype.
登录
查看更多内容
影响因子:
15.3
作者:
Croft, Michael;Carter, Laura;Swain, Susan L.;Dutton, Richard W.
通讯作者:
Dutton, Richard W.
DOI:
10.1073/pnas.95.24.14389
发表时间:
1998-11-24
影响因子:
11.1
作者:
Cao, YH;Linden, P;Alitalo, K
通讯作者:
Alitalo, K
影响因子:
4.3
作者:
MCADAM, AJ;PULASKI, BA;LORD, EM
通讯作者:
LORD, EM
影响因子:
11.2
作者:
Laakkonen, Pirjo;Waltari, Marika;Alitalo, Kari
通讯作者:
Alitalo, Kari
影响因子:
56.9
作者:
Dumont, DJ;Jussila, L;Alitalo, K
通讯作者:
Alitalo, K