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• W21371694 abstract "Background:The metronomic use of chemotherapeutic drugs is presumed to have anti-angiogenic effect. In the current study, we aimed to test the effects of lower doses of cytotoxic agents on VEGF secretion from tumor cell lines. Methods:We tested the cytotoxic effects of widely used chemotherapeutic drugs including 5-florouracil, irinotecan, oxaliplatin, paclitaxel and docetaxel in tumor cell lines, MCF-7 (human breast cancer cell line) HT-29 (human colon cancer cell line) and a primary gastric cancer cell line and calculated the IC50 values. We’ve also assayed the effects of the lower doses of chemotherapeutic drugs on the levels of VEGF secreted by tumor cells in vitro. Results:The human primary gastric cancer cells were more resistant to 5-FU and oxaliplatin than the HT29 and MCF-7 cell lines (p< 0.001). No significant differences were noticed in terms of the IC50 values of the irinotecan, docetaxel and paclitaxel among the studied tumor cell lines (p > 0.05). The test drugs yielded significant decreases in VEGF levels at the doses of −2 log of IC50 values in MCF-7 and primary gastric cancer cell lines. While 5-florouracil did not inhibit the VEGF secretion of HT-29 cell line, irinotecan, oxaliplatin, docetaxel and paclitaxel significantly decreased the levels of secreted VEGF. Conclusions:Our results suggest that lower doses of chemotherapeutic drugs decrease VEGF secretion from tumor cells without causing substantial cell killing. The data suggest the occurrence of a kind of selective drug-tumor cell type relationship." @default.
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• W21371694 date "2013-03-07" @default.
• W21371694 modified "2023-09-26" @default.
• W21371694 title "Low dose chemotherapeutic drugs without overt cytotoxic effects decrease the secretion of VEGF by cultured human tumor cells: A tentative relationship between drug type and tumor cell type response" @default.
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• W21371694 doi "https://doi.org/10.3233/cbm-130301" @default.
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