Vadim Le Joncour

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Multiform glioblastomas (GBM) are the most frequent and aggressive primary brain tumors in adults. The poor prognosis is due to neo-angiogenesis and cellular invasion, processes that require complex chemotaxic mechanisms involving motility, migration and adhesion. Understanding these different cellular events implies identifying receptors and transduction(More)
The first synthesis and photophysical properties of a fluorecently labeled camptothecin derivative, namely, camptothecin-FI (CPT-FI), an antitumoral agent that targets topoisomerase I, are reported. The preparation of this fluorescent conjugate is based on a highly convergent and flexible approach which enables the rapid chemical modification of the AB ring(More)
Chemotactic migration is a fundamental behavior of cells and its regulation is particularly relevant in physiological processes such as organogenesis and angiogenesis, as well as in pathological processes such as tumor metastasis. The majority of chemotactic stimuli activate cell surface receptors that belong to the G protein-coupled receptor (GPCR)(More)
e13589 Background: Cancer and treatments can induce cognitive impairments in patients, called "chemofog" such as deficits of visual and spatial memories and decline of psychomotor processing speed. Although direct effect of chemotherapy on cognitive functions and neurogenesis has been shown, the impact of targeted therapies has never been investigated.(More)
Tumor hypoxia plays a major role in reducing the efficacy of therapeutic modalities like chemotherapy and radiation therapy in combating cancer. In order to target hypoxic tissues, a tripeptide ligand having a 2-nitroimidazole moiety, as a bioreductive species, was synthesized. The latter was radiolabeled with (99m)Tc for imaging hypoxic regions of tumors(More)
Cancer and treatments may induce cognitive impairments in cancer patients, and the causal link between chemotherapy and cognitive dysfunctions was recently validated in animal models. New cancer targeted therapies have become widely used, and their impact on brain functions and quality of life needs to be explored. We evaluated the impact of everolimus, an(More)
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