New developments in the synthesis of acetylenic analogues of glutamate
Identifieur interne : 000733 ( Hal/Curation ); précédent : 000732; suivant : 000734New developments in the synthesis of acetylenic analogues of glutamate
Auteurs : Patrick Meffre [France] ; Zohra Benfodda [France] ; David Bénimélis [France] ; Valérie Rolland [France] ; Francine Acher [France]Source :
Abstract
Glutamate ((S)-Glu)is the major excitatory amino acid in the central nervous system. It acts by stimulating ionotropic and metabotropic glutamate receptors (iGluR and mGluR respectively). Glutamate has been shown to be involved not only in many neuropathologies such as anxiety, pain, ischemia, Parkinson's disease, epilepsy and schizophrenia. More recently, mGlu receptors have also been detected in non-neuronal cells suggesting that they could be implicated in carcinogenesis. mGlu receptors are G-protein-coupled receptors and eight subtypes (mGluR1 to 8) have been identified and classified into three groups (I-III) based upon sequence homology, transduction mechanism and pharmacological profile. Because of their modulating properties, mGlu receptors are recognized as promising therapeutic targets and many ligands (agonists and antagonists) have been prepared to better understand the pharmacology of mGlu receptors in order to selectively activate the different groups and subtypes of receptors. An -amino acid moiety can be found in all mGlu receptors competitive ligands and most of the side chains hold an acidic function. Examination of the glutamate binding site in the mGlu receptors and pharmacological data of some ligands shows that sterically constrained structures with an optimal distance between functional groups could lead to potent and selective new ligands. It is known that introducing an unsaturation in a biologically active structure could modify the conformation of the molecule and thus the biological activity. In this respect, the synthesis of new acetylenic analogues of glutamate will be described.
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<front><div type="abstract" xml:lang="en">Glutamate ((S)-Glu)is the major excitatory amino acid in the central nervous system. It acts by stimulating ionotropic and metabotropic glutamate receptors (iGluR and mGluR respectively). Glutamate has been shown to be involved not only in many neuropathologies such as anxiety, pain, ischemia, Parkinson's disease, epilepsy and schizophrenia. More recently, mGlu receptors have also been detected in non-neuronal cells suggesting that they could be implicated in carcinogenesis. mGlu receptors are G-protein-coupled receptors and eight subtypes (mGluR1 to 8) have been identified and classified into three groups (I-III) based upon sequence homology, transduction mechanism and pharmacological profile. Because of their modulating properties, mGlu receptors are recognized as promising therapeutic targets and many ligands (agonists and antagonists) have been prepared to better understand the pharmacology of mGlu receptors in order to selectively activate the different groups and subtypes of receptors. An -amino acid moiety can be found in all mGlu receptors competitive ligands and most of the side chains hold an acidic function. Examination of the glutamate binding site in the mGlu receptors and pharmacological data of some ligands shows that sterically constrained structures with an optimal distance between functional groups could lead to potent and selective new ligands. It is known that introducing an unsaturation in a biologically active structure could modify the conformation of the molecule and thus the biological activity. In this respect, the synthesis of new acetylenic analogues of glutamate will be described.</div>
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<abstract xml:lang="en">Glutamate ((S)-Glu)is the major excitatory amino acid in the central nervous system. It acts by stimulating ionotropic and metabotropic glutamate receptors (iGluR and mGluR respectively). Glutamate has been shown to be involved not only in many neuropathologies such as anxiety, pain, ischemia, Parkinson's disease, epilepsy and schizophrenia. More recently, mGlu receptors have also been detected in non-neuronal cells suggesting that they could be implicated in carcinogenesis. mGlu receptors are G-protein-coupled receptors and eight subtypes (mGluR1 to 8) have been identified and classified into three groups (I-III) based upon sequence homology, transduction mechanism and pharmacological profile. Because of their modulating properties, mGlu receptors are recognized as promising therapeutic targets and many ligands (agonists and antagonists) have been prepared to better understand the pharmacology of mGlu receptors in order to selectively activate the different groups and subtypes of receptors. An -amino acid moiety can be found in all mGlu receptors competitive ligands and most of the side chains hold an acidic function. Examination of the glutamate binding site in the mGlu receptors and pharmacological data of some ligands shows that sterically constrained structures with an optimal distance between functional groups could lead to potent and selective new ligands. It is known that introducing an unsaturation in a biologically active structure could modify the conformation of the molecule and thus the biological activity. In this respect, the synthesis of new acetylenic analogues of glutamate will be described.</abstract>
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