Medicinal agent for disease associated with epstein-barr...

A - Human Necessities – 61 – K

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A61K 31/7072 (2006.01) A61P 31/12 (2006.01) A61P 35/00 (2006.01) C12Q 1/02 (2006.01)

Patent

CA 2698645

1-(2-Fluoro-4-thio-.beta.-D-arabinofuranosyl)-5-methyluracil exhibits an anti- EB virus activity, and is therefore effective as a prophylactic or therapeutic agent for a disease associated with an EB virus. Each of a plasmid capable of expressing EB virus-TK and a plasmid capable of expressing human-TK is introduced into a TK- defect cell, thereby producing two types of cells respectively having the plasmids introduced therein. By using the two types of cells, it is possible to screen a medicinal agent which has cytotoxicity against the cell having the plasmid capable of expressing EB virus-TK introduced therein but has no toxicity against the cell having the plasmid capable of expressing human-TK introduced therein. In this manner, it becomes possible to screen a medicinal agent which specifically exhibits an anti-EB virus activity.

Le 1-(2-fluoro-4-thio-ß-D-arabinofuranosyl)-5-méthyluracile présente une activité antivirus EB et il est donc efficace en tant qu'agent prophylactique ou thérapeutique pour une maladie associée à un virus EB. Il est introduit un plasmide capable d'exprimer la TK du virus EB et un plasmide capable d'exprimer la TK humaine dans une cellule défectueuse en TK, produisant de cette manière deux types de cellules présentant respectivement les plasmides introduits en leur sein. Par l'utilisation des deux types de cellules, il est possible de réaliser un criblage à la recherche d'un agent thérapeutique qui possède une cytotoxicité contre la cellule présentant le plasmide capable d'exprimer la TK du virus EB introduit en son sein mais qui ne possède aucune toxicité contre la cellule présentant le plasmide capable d'exprimer la TK humaine introduit en son sein. De cette manière, il devient possible de réaliser un criblage à la recherche d'un agent thérapeutique qui présente spécifiquement une activité antivirus EB.

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