Division of Gastroenterology - Liver Research Center 















Jisu Li, M.D., Ph.D.

Associate Professor of Medicine

Address:

Rhode Island Hospital
Liver Research Center
55 Claverick Street, 4th Floor
Providence, RI 02903
phone: 401-444-7387
fax: 401-444-2939
E-mail:Ji_Su_Li_MD@Brown.edu

Research Interests:

Hepatitis B and C viruses are major causes of chronic hepatitis, liver cirrhosis and hepatocellular carcinoma. Our laboratory is interested in identifying hepatitis B virus receptors and co-factors. Using duck hepatitis B virus as a model, we have recently identified glycine decarboxylase (p120) as a binding protein to the pre-S envelope protein. Its specific binding to a few truncated pre-S peptides and correlation of its expression with active viral replication implicate it as a virus co-receptor. Studies are ongoing to define whether p120 is essential for the viral life cycle. In addition, there are ongoing studies that identify cellular proteins that may be associated with hepatitis C virus structural and nonstructural proteins in an attempt to better understand the pathogenesis of HCV induced hepatocellular carcinoma.

Selected Publications:

Guarnieri M, Kim KH, Bang G, Li J, Zhou Y, Tang X, Wands J, Tong S. Point mutations upstream of hepatitis B virus core gene affect DNA replication at the step of core protein expression. J Virol. 2006 Jan;80(2):587-95.

Fukutomi T, Zhou Y, Kawai S, Eguchi H, Wands JR, Li J.Hepatitis C virus core protein stimulates hepatocyte growth: correlation with upregulation of wnt-1 expression. Hepatology. 2005 May;41(5):1096-105.

Bang G, Kim KH, Guarnieri M, Zoulim F, Kawai S, Li J, Wands J, Tong S.Effect of mutating the two cysteines required for HBe antigenicity on hepatitis B virus DNA replication and virion secretion. Virology. 2005 Feb 5;332(1):216-24.

Khan N, Guarnieri M, Ahn SH, Li J, Zhou Y, Bang G, Kim KH, Wands JR, Tong S.Modulation of hepatitis B virus secretion by naturally occurring mutations in the S gene. J Virol. 2004 Apr;78(7):3262-70.

Li J, Tong S, Lee HB, Perdigoto AL, Spangenberg HC, Wands JR.Glycine decarboxylase mediates a postbinding step in duck hepatitis B virus infection. J Virol. 2004 Feb;78(4):1873-81.

Ahn SH, Kramvis A, Kawai S, Spangenberg HC, Li J, Kimbi G, Kew M, Wands J, Tong S. Sequence variation upstream of precore translation initiation codon reduces hepatitis B virus e antigen production. Gastroenterology. 2003 Nov;125(5):1370-8.

 

 

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