Abstract:
:Tumor endothelial marker 8 (TEM8) is a recently described protein that is preferentially expressed within tumor endothelium. We have developed a fusion protein that targets TEM8 and disrupts tumor vasculature by promoting localized thrombosis. Fusion protein specificity and function were evaluated using Western blot analysis, ELISA, and enzymatic assays. A xenograft model of colorectal carcinoma was used to test the efficacy of targeted and control fusion proteins. Mice treated with the gene encoding anti-TEM8/truncated tissue factor exhibited a 53% reduction in tumor volume when compared with the untreated animals (P < 0.0001; n = 10) and achieved a 49% increase in tumor growth delay by Kaplan-Meier analysis (P = 0.0367; n = 6). Immunohistochemistry confirmed tumor endothelial expression of TEM8, fusion protein homing to tumor vasculature, decrease in vessel density, and localized areas of thrombosis. These data support the hypothesis that targeting TEM8 can be an effective approach to influence tumor development by disrupting tumor vasculature.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Fernando S,Fletcher BSdoi
10.1158/0008-5472.CAN-09-0725subject
Has Abstractpub_date
2009-06-15 00:00:00pages
5126-32issue
12eissn
0008-5472issn
1538-7445pii
69/12/5126journal_volume
69pub_type
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