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Anti-angiogenic drugs impede chemotherapy-stimulated tumor recovery
Date:9/8/2008

>The researchers built on this earlier observation by analyzing whether different, conventional chemotherapeutic drugs had variable abilities to impact CEP mobilization and whether antiangiogenic drugs could block chemotherapy-induced CEP responses and hence amplify their effectiveness. They found that paclitaxel rapidly induced CEP mobilization whereas gemcitabine did not. They went on to show that pharmacological inhibition of CEP mobilization by combination treatment with an antiangiogenic drug or treatment of mutant mice deficient in CEPs resulted in enhanced antitumor effects mediated by paclitaxel but not gemcitabine.

"Our results provide a new perspective regarding the impact that conventional chemotherapy can have on tumor angiogenesis and hence how combination with antiangiogenic drugs may amplify the antitumor effects of chemotherapy," explains Dr. Kerbel. "Further, our findings provide a potential explanation of why not all chemotherapy drugs will necessarily have their efficacy enhanced by the addition of an antiangiogenic agent when the mechanism involves blunting CEP mobilization acutely induced by the chemotherapy drug."


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