Screen for glutamate reuptake inhibitors, stimulators, and...

G - Physics – 01 – N

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G01N 33/94 (2006.01) A61K 31/47 (2006.01)

Patent

CA 2421507

Disclosed is a method for identifying compounds that bind to or modulate a glutamate transporter. The disclosed method is useful for identifying compounds that can inhibit, stimulate, or modulate the activity of the glutamate transporter and thus affect glutamate reuptake. The method is a screening technique where compounds known to bind to glutamate receptors (for example, glutamate receptor ligands, including many agonists, and antagonists) are bound to a glutamate transporter and compounds are screened to identify those that can after the binding of the glutamate receptor-binding compounds. Compounds shown to alter the binding of the receptor-binding compounds. Compounds shown to alter the binding of the receptor compounds from glutamate transporter in the disclosed assay can have a variety of effects on glutamate transporter in the disclosed assay can have a variety of effects on glutamate transporter activity including activation or inhibition. These compounds are expected to affect or interfere with glutamate reuptake by the glutamate transporter and thus can be used to modulate, stimulate, or inhibit glutamate reuptake. Such compounds are useful to treat various neurological diseases and conditions involving glutamate transporter and glutamate receptor activation. One of the compounds is (2S,4R-4-methylgutamate or [3H]-(2S,4R-4- methylglutamate. For example, excess extracellular glutamate is a cause of excessive activation of glutamate receptors. Stimulating glutamate reuptake by glutamate transporter can ameliorate excessive activation of glutamate receptors by reducing the extracellular glutamate concentration. Prodrug forms of transporter compounds are preferred for use as drugs.

L'invention concerne une technique d'identification de composés qui se fixent ou qui modulent un transporteur de glutamate. L'invention est utilisée pour identifier des composés qui inhibent, stimulent, ou modulent l'activité du transporteur de glutamate, affectant ainsi le recaptage de glutamate. L'invention consiste en une technique de criblage selon laquelle les composés connus pour se fixer aux récepteurs de glutamate (par exemple, les ligands de récepteurs de glutamate, ainsi que de nombreux agonistes, et antagonistes) sont fixés à un transporteur de glutamate; les composés étant criblés pour identifier ceux qui sont capables d'altérer la fixation des composés de liaison du récepteur de glutamate. Dans cet essai, les composés présentés pour leur capacité d'altération de la fixation des composés récepteurs dans les transporteurs de glutamate peuvent avoir une multitude d'effets sur l'activité du transporteur de glutamate, notamment l'activation ou l'inhibition. Comme ces composés sont supposés affecter ou interférer avec le recaptage de glutamate via le transporteur de glutamate, on peut les utiliser pour moduler, stimuler, ou inhiber le recaptage de glutamate. Ces composés sont utilisés dans le traitement de divers états et maladies neurologiques impliquant le transporteur de glutamate et l'activation du récepteur de glutamate. Un de ces composés est le (2S,4R)-4-méthylgutamate ou le [?3¿H]-(2S,4R)-4-méthylglutamate. Par exemple, l'excès de glutamate extracellulaire entraîne l'activation excessive des récepteurs de glutamate. La stimulation du recaptage de glutamate via le transporteur de glutamate peut améliorer l'activation excessive des récepteurs de glutamate en réduisant la concentration de glutamate extracellulaire. Comme médicaments, on préfère l'utilisation de la forme promédicaments des composés transporteurs.

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