Abstract:
:The proapoptotic death receptor DR5 has been studied extensively in cancer cells, but its action in the tumor microenvironment is not well defined. Here, we uncover a role for DR5 signaling in tumor endothelial cells (ECs). We detected DR5 expression in ECs within tumors but not normal tissues. Treatment of tumor-bearing mice with an oligomeric form of the DR5 ligand Apo2L/TRAIL induced apoptosis in tumor ECs, collapsing blood vessels and reducing tumor growth: Vascular disruption and antitumor activity required DR5 expression on tumor ECs but not malignant cells. These results establish a therapeutic paradigm for proapoptotic receptor agonists as selective tumor vascular disruption agents, providing an alternative, perhaps complementary, strategy to their use as activators of apoptosis in malignant cells.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Wilson NS,Yang A,Yang B,Couto S,Stern H,Gogineni A,Pitti R,Marsters S,Weimer RM,Singh M,Ashkenazi Adoi
10.1016/j.ccr.2012.05.014subject
Has Abstractpub_date
2012-07-10 00:00:00pages
80-90issue
1eissn
1535-6108issn
1878-3686pii
S1535-6108(12)00213-9journal_volume
22pub_type
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