Improved methods of and compositions for the prevention of...

A - Human Necessities – 61 – K

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A61K 31/137 (2006.01)

Patent

CA 2604887

Compositions for reducing dependency and addiction to substances of abuse are provided. Chloride channels such as the GABAA receptors are altered under conditions of dependency and withdrawal such that the electrophysiological properties of the GABAA receptor containing neurons are altered thereby providing a pathophysiological condition resulting in symptoms of dependency and withdrawal such as anxiety. Specifically, under conditions of withdrawal the relative ratio of the a1 receptor subunit decreases relative to the a4 receptor subunit. Endogenous neurosteroid production is also associated with the molecular changes underlying the alterations of GABA-gated chloride channels. Compositions of at least two compounds including at least one inhibitor of neurosteroid production are useful for treating the pathophysiology of addiction, dependency and substance abuse withdrawal.

L'invention concerne des compositions permettant de limiter la dépendance et l'addiction à des substances donnant lieu à des abus. Les canaux chlorure, tels que les récepteurs GABAA, sont modifiés dans des conditions de dépendance et de sevrage de sorte que les propriétés électrophysiologiques des neurones contenant le récepteur GABAA sont modifiées, ce qui produit un état pathophysiologique résultant en symptômes de dépendance et de sevrage tel que l'anxiété. De manière spécifique, dans des conditions de sevrage, le rapport relatif de la sous-unité du récepteur a1 décroît par rapport à la sous-unité du récepteur a4. La production de neurostéroïdes endogènes est également associée aux changements moléculaires entraînant les altérations des canaux chlorure à grille GABA. On utilise des compositions d'au moins deux composés comprenant au moins un inhibiteur de production de neurostéroïdes pour traiter la pathophysiologie de l'addiction, de la dépendance et du sevrage de toxicomanie.

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