Hypoxia-inducible factor-1 target genes as indicators of tumor vessel response to vascular endothelial growth factor inhibition

被引:64
|
作者
Dang, Duyen T. [2 ,3 ]
Chun, Sang Y. [1 ]
Burkitt, Kyunghee [1 ]
Abe, Masako [4 ]
Chen, Shaowei [1 ]
Havre, Pamela [4 ]
Mabjeesh, Nicola J. [5 ]
Heath, Elisabeth I. [6 ]
Vogelzang, Nicholas J. [4 ]
Cruz-Correa, Marcia [7 ]
Blayney, Douglas W. [1 ,3 ]
Ensminger, William D. [1 ,3 ]
Croix, Brad St. [8 ]
Dang, Nam H. [4 ]
Dang, Long H. [1 ,3 ]
机构
[1] Univ Michigan, Med Ctr, Dept Internal Med, Div Hematol Oncol, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Med Ctr, Dept Internal Med, Div Gastroenterol, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Ctr Comprehens Canc, Ann Arbor, MI 48109 USA
[4] Nevada Canc Inst, Las Vegas, NV USA
[5] Tel Aviv Univ, Tel Aviv Sourasky Med Ctr, Dept Urol, Prostate Canc Res Lab, IL-69978 Tel Aviv, Israel
[6] Wayne State Univ, Barbara Ann Karmanos Canc Inst, Detroit, MI USA
[7] Univ Puerto Rico, Ctr Canc, San Juan, PR 00936 USA
[8] NCI, Frederick, MD 21701 USA
关键词
D O I
10.1158/0008-5472.CAN-07-1589
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Antiangiogenic therapy improves survival in patients with advanced stage cancers. Currently, there are no reliable predictors or markers for tumor vessel response to antiangiogenic therapy. To model effective antiangiogenic therapy, we disrupted the VEGF gene in three representative cancer cell lines. HCT116 xenografts had low proportions of endothelial tubes covered by pericytes that stained with alpha-smooth muscle actin (SMA) antibody. Upon disruption of VEGF, HCT116(VEGF-/-) xenografts had significantly decreased tumor microvessel perfusion compared with their parental counterparts. Furthermore, HCT116(VEGF-/-) xenografts mounted a tumor-reactive response to hypoxia, characterized by the induction of hypoxia-inducible factor-1 (HIF-1) target genes. One highly induced protein was DPP4, a measurable serum protein that has well-described roles in cancer progression. In contrast, LS174T and MKN45 tumor xenografts had high proportion of endothelial tubes that were covered by SMA+ pericytes. Upon disruption of VEGF, LS174T(VEGF-/-) and MKN45(VEGF-/-) xenografts maintained tumor microvessel perfusion. As such, there were no changes in intratumoral hypoxia or HIF-1 alpha induction. Together, these data show that the extent of tumor vessel response to angiogenic inhibition could be correlated with (a) the preexisting coverage of tumor endothelial tubes with SMA+ pericytes and (b) differential tumor induction of HIF-1 target genes. The data further show that DPP4 is a novel marker of HIF-1 induction. Altogether, these preclinical findings suggest novel clinical trials for predicting and monitoring tumor vessel responses to antiangiogenic therapy.
引用
收藏
页码:1872 / 1880
页数:9
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