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OverviewHepatitis B Virus (HBV) X protein (pX) is implicated by an unknown mechanism in hepatocellular carcinoma (HCe development, characterized by increased rate of chromosomal aberrations. Although most patients clear the infection and develop immunity, chronic infection in 5 to 10% infected patients lead to HCC development in the 4th to 5th decade of life. I demonstrate that tetracycline-regulated pX expression induces multipolar spindles and polyploidy (>4N DNA). To understand the mechanism of pX-mediated polyploidy, I investigated whether pX promotes DNA re-replication. Dual-parameter flow cytometry demonstrates pX-dependent BrdU incorporation in cells with >4N DNA. pX also induces expression of replication initiation factors Cdc6 and Cdtl, while suppressing geminin expression, a negative regulator of re-replication. G2- phase synchronized cells exhibit pX-dependent: i) nuclear Cdc6 and Mcm5 colocalization; ii) absence of nuclear geminin; iii) increased BrdU incorporation; iv) ATR activation; v) RAD17 and H2AX phosphorylation; and vi) co-localization of -H2AX with the DNA elongation factor PCNA. Full Product DetailsAuthor: Lova RakotomalalaPublisher: VDM Verlag Dr. Muller Aktiengesellschaft & Co. KG Imprint: VDM Verlag Dr. Muller Aktiengesellschaft & Co. KG Dimensions: Width: 15.20cm , Height: 0.80cm , Length: 22.90cm Weight: 0.222kg ISBN: 9783639047080ISBN 10: 3639047087 Pages: 144 Publication Date: 23 June 2009 Audience: General/trade , General Format: Paperback Publisher's Status: Active Availability: In Print  This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |
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