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  • Title: Increased suppression of oncolytic adenovirus carrying mutant k5 on colorectal tumor.
    Author: Fan JK, Xiao T, Gu JF, Wei N, He LF, Ding M, Liu XY.
    Journal: Biochem Biophys Res Commun; 2008 Sep 19; 374(2):198-203. PubMed ID: 18621025.
    Abstract:
    Angiogenesis plays a key role in the development of a wide variety of malignant tumors. The approach of targeting antiangiogenesis has become an important field of cancer gene therapy. In this study, the antiangiogenesis protein K5 (the kringle 5 of human plasminogen) has been mutated by changing leucine71 to arginine to form mK5. Then the ZD55-mK5, which is an oncolytic adenovirus expressing mK5, was constructed. It showed stronger inhibition on proliferation of human umbilical vein endothelial cell. Moreover, in tube formation and embryonic chorioallantoic membrane assay, ZD55-mK5 exhibited more effective antiangiogenesis than ZD55-K5. In addition, ZD55-mK5 generated obvious suppression on the growth of colorectal tumor xenografts and prolonged the life span of nude mice. These results indicate that ZD55-mK5 is a potent agent for inhibiting the tumor angiogenesis and tumor growth.
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