The Kaposi's sarcoma associated herpes virus (KSHV/HHV-8) is a gammaherpesvirus associated with human malignancies including Kaposi's sarcoma and body cavity based lymphomas (BCBLs) or Pleural Effusion Lymphomas (PELs). One of the latency-associated nuclear antigen (LANA) is constitutively expressed in all latently infected KSHV cells and is incloved in the maintenance of the KSHV genome as well as transcriptional regulation. Recent studies has also shown an important role in regulation of vial latency in association with the viral immediate early transactivator Rta. Studies from our group and others have shown that LANA binds to cis-acting elements withing the KSHV terminal repeats (TR) and associated with a number of chromosomal proteins. Additionally, LANA can induce chromosomal aberations when expressed in human cells in vitro suggesting a role for LANA in induction of oncogenesis in KSHV infected cells.
The specific aims of this proposal will continue to focus on studies of KSHV latent replication in a LANA dependent and independent mode.
Specific aims will focus on 1) The identification and characterization of specific sites within the KSHV genome capable of initiating KSHV latent replication;2) Determine the role of LANA and other cellular proteins in terms of the dynamics of protein-DNA interactions at these sites of latent replication for firing of these replication initiation sites;and 3) Genetic analysis of LANA and these replication initiation sites for determination of the role of the cis and trans acting factors during the initial stages of infection and maintenance of KSHV latent replication.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
3R01CA091792-08S1
Application #
7885167
Study Section
Special Emphasis Panel (ZRG1-AARR-C (04))
Program Officer
Ogunbiyi, Peter
Project Start
2001-04-01
Project End
2012-07-31
Budget Start
2009-08-01
Budget End
2010-07-31
Support Year
8
Fiscal Year
2009
Total Cost
$78,040
Indirect Cost
Name
University of Pennsylvania
Department
Microbiology/Immun/Virology
Type
Schools of Medicine
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104
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Jha, Hem Chandra; Upadhyay, Santosh Kumar; A J Prasad, Mahadesh et al. (2013) H2AX phosphorylation is important for LANA-mediated Kaposi's sarcoma-associated herpesvirus episome persistence. J Virol 87:5255-69
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Verma, Subhash C; Lu, Jie; Cai, Qiliang et al. (2011) Single molecule analysis of replicated DNA reveals the usage of multiple KSHV genome regions for latent replication. PLoS Pathog 7:e1002365
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