Increasing cerebral bioavailability of drugs

A - Human Necessities – 61 – K

Patent

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Details

A61K 31/195 (2006.01) A61K 9/20 (2006.01) A61K 9/28 (2006.01) A61K 31/198 (2006.01) A61K 31/505 (2006.01) A61K 31/519 (2006.01) A61K 31/525 (2006.01) A61K 31/7076 (2006.01)

Patent

CA 2367002

A method and compositions are provided for increased cerebral bioavailability of blood-born compositions by administering the composition of interest while increasing brain NO levels. This increase in NO levels may be accomplished by stimulating increased production of NO by eNOS, especially by adminstering L- arginine, by administering agents that increase NO levels independent of ecNOS, or by any combination of these methods. As NO is increased, cerebral blood flow is consequently increased, and drugs in the blood stream are carried along with the increased flow into brain tissue. By increased flow, the site of action will be exposed to more drug molecules. By stimulating increased NO production, administration of drugs that are not easily introduced to the brain may be facilitated and/or the serum concentration necessary to achieve desired physiologic effects may be reduced.

L'invention concerne un procédé et des compositions destinés à augmenter la biodisponibilité dans le cerveau de compositions transportées par le sang, ce procédé consistant à administrer une composition spécifique, tout en accroissant les taux de monoxyde d'azote dans le cerveau, ce que l'on obtient en stimulant la production accrue de monoxyde d'azote par des monoxyde d'azote synthases endothéliales, notamment en administrant de la L-arginine, en administrant des agents augmentant les taux de monoxyde d'azote, indépendamment de ces synthases de cellules endothéliales, ou en administrant une quelconque combinaison de ces procédés. Par suite de l'augmentation du monoxyde d'azote, le débit sanguin cérébral s'accroît en conséquence et les médicaments présents dans le flux sanguin sont transportés par ce débit accru dans les tissus cérébraux. Grâce à ce débit accru, le site d'action est exposé à plus de molécules de médicament, la stimulation d'une production accrue de monoxyde d'azote facilitant l'apport de médicaments qui ne sont pas facilement introduits dans le cerveau, et/ou permettant de réduire la teneur sérique nécessaire pour obtenir les effets physiologiques souhaités.

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