Abstract: The present invention relates to the technical field of pharmaceuticals and specifically describes an application of a 5-hydroxytryptamine receptor 1A in preparing a drug for portal hypertension. The present invention achieved a significant decrease in portal venous pressure in model rats with cirrhotic portal hypertension by means of an HTR1A inhibitor WAY100635 administered at 1 mg/kg/day by intraperitoneal injection or alverine administered at 15 mg/kg/day by oral gavage. A 5-hydroxytryptamine receptor 1A antagonist can be used to prepare an experimental drug for the treatment of cirrhotic portal hypertension. Furthermore, the 5-hydroxytryptamine receptor 1A antagonist can also be used to prepare drugs for symptoms of portal hypertension syndrome, such as esophageal and fundal varices, rupture and bleeding, ascites, or hepatic encephalopathy.

Abstract: Provided are methods of targeted expression by the cartilage-derived retinoic acid-sensitive protein (CD-RAP) promoter. It is also directed to nucleic acid constructs and vectors useful for expression of nucleic acid sequences targeted to cartilage during development or in adult cartilage tissue, or for their expression in specific tumor cells such as chondrosarcomas and mammary tumor cells. The invention also relates to transgenic animals altered to contain the CD-RAP promoter transgene.