1 resultado para Potenziali Evento Correlati, Integrazione Audio-Visiva, Apprendimento sinaptico, Collicolo Superiore, Corteccia Parietale
em University of Cagliari UniCA Eprints
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Resumo:
Cannabinoid receptors are members of the large family of G-protein coupled receptors. Two types of cannabinoid receptor have been discovered: CB1 and CB2. CB1 receptors are localised predominantly in the brain whereas CB2 receptors are more abundant in peripheral nervous system cells. CB1 receptors have been related with a number of disorders, including depression, anxiety, stress, schizophrenia, chronic pain and obesity. For this reason, several cannabinoid ligands were developed as drug candidates. Among these ligands, a prominent position is occupied by SR141716 (Rimonabant), which is a pyrazole derivative with inverse agonist activity discovered by Sanofi-Synthelabo in 1994. This compound was marketed in Europe as an anti-obesity drug, but subsequently withdrawn due to its side-effects. Since the relationship between the CB1 receptors’ functional modification, density and distribution, and the beginning of a pathological state is still not well understood, the development of radio-ligands suitable for in vivo PET (Positron Emission Tomography) functional imaging of CB1 receptors remains an important area of research in medicine and drug development. To date, a few radiotracers have been synthesised and tested in vivo, but most of them afforded unsatisfactory brain imaging results. A handful of radiolabelled CB1 PET ligands have also been submitted to clinical trials in humans. In this PhD Thesis the design, synthesis and characterization of three new classes of potential high-affinity CB1 ligands as candidate PET tracers is described.