Method and composition for treating tumors by selective...

A - Human Necessities – 61 – K

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A61K 48/00 (2006.01) A61K 38/19 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2421585

Compositions and methods are provided for inducing death of cancer cells through apotposis mediated by the death ligand, TRAIL. The method comprising: introducing an expression vector into a group of cells comprising cells that express a receptor for TRAIL. The expression vector comprises a polynucleotide sequence encoding TRAIL whose expression is preferably regulated by a conditional promoter in the vector. The cells into which the expression vector is introduced express TRAIL when conditions are suitable to activate the conditional promoter. The expressed TRAIL induces cell death in those cells which express the TRAIL receptor through interaction between TRAIL and the receptor such as DR4 and DR5. The method can be used for treating tumors site- specifically and in a dose-adjustable manner.

L'invention concerne des compositions et des méthodes d'induction de la mort de cellules cancéreuses par apoptose liée au ligand de mort TRAIL. La méthode consiste à introduire un vecteur d'expression dans un groupe de cellules comprenant des cellules exprimant un récepteur pour TRAIL. Le vecteur d'expression comprend une sequence polynucléotidique codant pour TRAIL dont l'expression est, de préférence, régulée par un promoteur conditionnel dans le vecteur. Les cellules dans lesquelles le vecteur d'expression est introduit expriment TRAIL lorsque les conditions sont adaptées pour activer le promoteur conditionnel. Le TRAIL exprimé induit la mort cellulaire dans les cellules exprimant le récepteur de TRAIL grâce à l'interaction entre TRAIL et le récepteur, par exemple DR4 et DR5. Cette méthode peut s'utiliser pour traiter les tumeurs de manière spécifique par rapport à leur site et par régulation des doses.

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