Agent for the prevention and treatment of liver diseases...

A - Human Necessities – 61 – K

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A61K 31/519 (2006.01)

Patent

CA 2611638

The present invention relates to the pharmaceutical compositionfor prevention and treatment of liver diseases containing pyrazolopyrimidine derivative as an active ingredient. According to the present invention, pyrazolopyrimidine derivative has an excellent effect on inhibiting collagen synthesis in hepatic stellate cellsand acts directly on the portal vein. Particularly, it may increase the diameter and the amount of blood flow of the portal vein, and finally decrease the pressure thereof. Therefore, pyrazolopyrimidine derivative can be used advantageously for prevention and treatment of hepatic fibrosis, liver cirrhosis caused by hepatic fibrosis, portal hypertension and various complications caused by portal hypertension. In addition, pyrazolopyrimidine derivative according to the present invention can reduce dosing frequency because of its long half-life, and therefore, has an advantage to improve the drug compliance of patients suffering from chronical liver diseases.

La présente invention porte sur une composition pharmaceutique pour la prévention et le traitement des maladies du foie contenant un dérivé de la pyrazolopyrimidine comme ingrédient actif. Selon la présente invention, le dérivé de pyrazolopyrimidine a un effet excellent sur l~inhibition de la synthèse du collagène dans les cellules de Kupffer et agit directement sur la veine porte. En particulier, il peut augmenter le diamètre de la veine porte et la quantité de sang qui s~écoule à travers celle-ci, et finalement diminuer sa pression. De ce fait, le dérivé de pyrazolopyrimidine peut être utilisé de façon avantageuse pour la prévention et le traitement de la fibrose hépatique, de la cirrhose du foie provoquée par la fibrose hépatique, de l~hypertension portale et de diverses complications provoquées par l~hypertension portale. De plus, le dérivé de pyrazolopyrimidine selon la présente invention peut réduire la fréquence des doses du fait de sa demi vie longue, et de ce fait, présente un avantage en termes de respect des prises par les patients souffrant de maladies chroniques du foie.

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