AIM: Human herpesvirus 6B(HHV-6B) is the etiologic agent of exanthem subitum and is associated with febrile illnesses in children, neurological manifestations during primary infection, and clinical complications in organ transplant patients. The ORF U83 of HHV-6B has been identidied encoding a functional chemokine and U83 protein was detected out in brain tissues of some patients with multiple cirrhosis. The aim of this study was to establish HHV-6B U83 transgenic mouse lines, which would provide a pathological animal model for the research of the relationship between HHV-6B U83 gene and multiple cirrhosis. METHODS: Transgenic animal technique was applied in the present study. RESULTS: We successfully established 3 lines of transgenic mice with HHV-6B U83 gene integrated to their chromosomes, through constructing the DNA fragment which consisted of GFAP promotor, HHV-6B U83 and mouse protamine 1 sequence and injecting to the mouse eggs. CONCLUSION: This establishment of HHV-6B U83 transgenic mouse lines would benefit the observation and analysis of association of HHV-6B infection with neurological system diseases.

The bed rest has been considered essentialfor the conventional treatment ot acute hepatitis. Previously, it was thought that earlieractivity would prolorng the disease course and exaggerat the disease. The patients should not be allowed to perform physical activity until live -function recoveryed. But clinical practice indicated appropriate exercise can improve immune function the aute hepatitis patients who erformedthe exercise had shorter disease course ,ther quicker recovery of physical strength and they showed trends in recovery of liver function thepatientients who didn perform exercise show no ehanges. Therefore , we considered appropriate exercise therapy is very essential for the treat-ment of acute hepatitis. Exercise should be recognized as an equally impo rtant treatment modality of the infectious hepatitis.