Syntheses and biological evaluations of combretastatine A-4 analogs and DYRK kinases inhibitors ; Synthèses et évaluations biologiques d’analogues de la combrétastatine A-4 et d’inhibiteurs de kinases DYRK

Up to now, cancer is the second deadliest pathology in the World and is still considered as one of the most challenging public health issue. Globally, it has been assessed to be the main pathologic cause of death by the World Health Organization. This bad prognosis is partly due to the ability of cancer cells to give metastases but also to resistances phenomenon impeding drastically the effect of chemotherapeutic and radiotherapeutic treatments. As a consequence, there is currently a critical lack of effective treatments which would completely eradicate tumor cells, with minimal side effects. In spite of some difficulties in this competitive research area, the discovery of cancer therapeutics remains stimulating and we aim to achieve the synthesis of novel anticancer agents.Given its pivotal role in tumor growth and survival, the tumor vasculature represents an attractive target for anticancer therapy. Apart from angiogenesis inhibitors that compromise the formation of new blood vessels, the class of vascular disrupting agents (VDAs) targets endothelial cells and pericytes of the already established tumor vasculature, resulting in tumor ischemia and necrosis. A striking example of VDA is the combretastatin A-4, also known as CA-4, which was originally isolated from the bark of the South African willow tree Combretum caffrum by the American scientist G.R. Pettit in 1989. These products demonstrated to be efficient against a wide array of cancers such as breast, colon, lung or ovarian cell lines. New CA-4 analogs containing different heterocycles instead of the hydroxymethoxy substituted pharmacomodulable B ring were prepared and evaluated for their in cellulo tubulin polymerization inhibition and antiproliferative activities. In the other hand, tumor cell survival is a complex process which remains poorly understood. As part of the survival machinery, chemoresistances and DNA repairs are central elements regulated by a prosurvival/proapoptotic signal balance. Protein kinases are known to be directly involved in ...