Hepatitis B virus (HBV) is the most prevalent human tumor virus. It is estimated that chronic HBV infection causes 1,000,000 cases of liver cancer annually. HBV actively replicates within liver cells to maintain its chronic infection. We work to understand the mechanisms by which HBV replicates in order to identify targets for new therapies. During this last funding period our most significant findings and progress included: (1) learning that HBV genome replication requires complex contributions from the replication template. The genomic RNA and DMA replication intermediates are not passive templates, but proceed through dynamic topologies that guide their own replication;(2) elucidating the involvement of the host cellular multivesicular body pathway in HBV virion production;and (3) conducting the first high throughput genetic screen to systematically identify host genes involved in HBV replication. This present proposal will build upon progress engendered during the last funding period. This project has three aims: (1) to study the synthesis of plus-strand DNA to elucidate (a) the mechanisms of template switching and inhibition of in situ priming, (b) the role of the C-terminus of capsid protein, and (c) the relationship between genome maturation and capsid envelopment;(2) to study the synthesis, accumulation and maintenance of cccDNA;and (3) to study the role of the Rho GTPase pathway in HBV virion production. These studies will uncover new mechanisms of virus replication and identify targets for new and better HBV therapies.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Program Projects (P01)
Project #
5P01CA022443-35
Application #
8377339
Study Section
Special Emphasis Panel (ZCA1-GRB-S)
Project Start
Project End
Budget Start
2012-05-01
Budget End
2013-04-30
Support Year
35
Fiscal Year
2012
Total Cost
$362,801
Indirect Cost
$115,969
Name
University of Wisconsin Madison
Department
Type
DUNS #
161202122
City
Madison
State
WI
Country
United States
Zip Code
53715
Park, Soyeong; Park, Jung Wook; Pitot, Henry C et al. (2016) Loss of Dependence on Continued Expression of the Human Papillomavirus 16 E7 Oncogene in Cervical Cancers and Precancerous Lesions Arising in Fanconi Anemia Pathway-Deficient Mice. MBio 7:
Lee, Denis; Norby, Kathryn; Hayes, Mitchell et al. (2016) Using Organotypic Epithelial Tissue Culture to Study the Human Papillomavirus Life Cycle. Curr Protoc Microbiol 41:14B.8.1-14B.8.19
Bodelon, Clara; Vinokurova, Svetlana; Sampson, Joshua N et al. (2016) Chromosomal copy number alterations and HPV integration in cervical precancer and invasive cancer. Carcinogenesis 37:188-96
Unchwaniwala, Nuruddin; Sherer, Nathan M; Loeb, Daniel D (2016) Hepatitis B Virus Polymerase Localizes to the Mitochondria, and Its Terminal Protein Domain Contains the Mitochondrial Targeting Signal. J Virol 90:8705-19
Jones, Richard J; Iempridee, Tawin; Wang, Xiaobin et al. (2016) Lenalidomide, Thalidomide, and Pomalidomide Reactivate the Epstein-Barr Virus Lytic Cycle through Phosphoinositide 3-Kinase Signaling and Ikaros Expression. Clin Cancer Res 22:4901-4912
Zeng, Hao; Lu, Li; Chan, Ngai Ting et al. (2016) Systematic identification of Ctr9 regulome in ERα-positive breast cancer. BMC Genomics 17:902
Tan, Xiaojun; Lambert, Paul F; Rapraeger, Alan C et al. (2016) Stress-Induced EGFR Trafficking: Mechanisms, Functions, and Therapeutic Implications. Trends Cell Biol 26:352-66
Makielski, Kathleen R; Lee, Denis; Lorenz, Laurel D et al. (2016) Human papillomavirus promotes Epstein-Barr virus maintenance and lytic reactivation in immortalized oral keratinocytes. Virology 495:52-62
Chiu, Ya-Fang; Sugden, Bill (2016) Epstein-Barr Virus: The Path from Latent to Productive Infection. Annu Rev Virol 3:359-372
Chandra, Janin; Kuo, Paula T Y; Hahn, Anne M et al. (2016) Batf3 selectively determines acquisition of CD8(+) dendritic cell phenotype and function. Immunol Cell Biol :

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