ABSTRACT
We investigated whether hepatitis B spliced protein affect the NF-kappa B activities by interacting with ubiquitously expressed transcript splice variant 1 (UXT-V1).The HBSP-UXT-V1 protein interactions were screened by yeast two hybrid assay,and confirmed by immunoprecipitation,confocal microscopy,mammalian two hybrid assay,and GST-Pulldown assay.The reporter plasmids driven by NF-kappa B promoter were transfected into UXT-knockdown HBSP stably expressed cell lines,and the reporter genes were detected after transfection.Results showed that the interaction between UXT-V1 and HBSP in yeast was demonstrated.Furtherly,HBSP could interact with UXT-V1 in mammalian cells.HBSP could enhance NF-kappa B activities,and this effect was partly achieved by the interaction with UXT-V1.In conclusion,the effect of HBSPUXT-V1 interaction on the NF-kappa B pathway in hepatocytes may have an impact on HBV related liver diseases.