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Polyproline‐type helical‐structured low‐molecular weight heparin (LMWH)‐taurocholate conjugate as a new angiogenesis inhibitor
Author(s) -
Lee Esak,
Kim YooShin,
Bae Sang Mun,
Kim Sang Kyoon,
Jin Shunji,
Chung Seung Woo,
Lee Myungjin,
Moon Hyun Tae,
Jeon OkCheol,
Park Rang Woon,
Kim In San,
Byun Youngro,
Kim Sang Yoon
Publication year - 2009
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.24239
Subject(s) - matrigel , angiogenesis , heparin , vascular endothelial growth factor , cancer research , pharmacology , chemistry , medicine , vegf receptors
Although heparin can regulate angiogenesis, tumor growth and metastasis, its clinical application, as well as that of low‐molecular heparin (LMWH), for treating cancer are limited because of heparin's anticoagulant activity and risk of hemorrhages. LMWH‐taurocholate conjugates (LHT7), which have low anticoagulant activity, were synthesized. The structural property of LHT was evaluated by circular dichroism and the binding affinity of LHT7 to vascular endothelial growth factor 165 (VEGF 165 ) was measured by isothermal titration calorimetry. The inhibitory effect of LHT7 on VEGF‐mediated KDR (VEGF‐receptor 2) phosphorylation in Human umbilical vein endothelial cells was evaluated. The VEGF 165 dependent Matrigel plug assay was performed to verify the antiangiogenic potential of LHT7 on a VEGF 165 inhibitor. Finally, tumor growth inhibition effects of LHT7 on SCC7 and the survival rate of animal models were investigated. Moreover, MDA‐MB231 xenograft mouse model was additionally used to confirm the therapeutic effect of LHT7 on human breast cancer cell line. As a result, LHT7 which has 12.7% of anticoagulant activity of the original LMWH showed a peculiar polyproline‐type helical structure. LHT7 binds to VEGF strongly and inhibits VEGF dependent KDR phosphorylation. The results of Matrigel plug assay proved LHT7 as a strong antiangiogenic agent inhibiting VEGF 165 . Remarkably, LHT7 showed a significant tumor growth inhibition potential on SCC7 with an increased survival rate. LHT7 also delayed tumor growth in MDA‐MB231 human breast cancer cell lines. © 2008 UICC