Genome-wide transcription program and expression of the Rta responsive gene of Epstein-Barr virus.
Infection with Epstein-Barr virus (EBV) usually leads to a latent state in B lymphocytes. The virus can be reactivated through two viral transactivators, Zta and Rta, leading to a cascade of gene expression. An EBV DNA array was generated to analyze the pattern of transcription of the entire EBV genome under various conditions. Firstly, a complete set of temporal expression clusters of EBV genes was displayed by analyzing the array data of anti-IgG-induced Akata cells. In addition to assigning genes of unknown function to the various clusters, increasing expression of latent genes, including EBNA2, EBNA3A and EBNA 3C, was observed during virus replication. Secondly, gene expression independent of viral DNA replication was analyzed in PAA blocked Akata cells and in chemically induced Raji cells. Several genes with presumed late functions were found to be expressed with early kinetics and independent of viral DNA replication, suggesting possible novel functions for these genes. Finally, the EBV array was used to identify Rta responsive gene expression in Raji cells, and in the EBV-positive epithelial cells NA, using a Zta siRNA strategy. The array data were confirmed by Northern blotting, RT-PCR and reporter assays. All the information here thus provides a better understanding of the control of EBV lytic gene expression.
Lu
Chih-Chung
CC
Graduate Institute and Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Jen-Ai Rd, 1st section, Taipei 100, Taiwan.
Jeng
Yi-Ying
YY
Tsai
Ching-Hwa
CH
Liu
Mei-Ying
MY
Yeh
Sheng-Wen
SW
Hsu
Tsuey-Ying
TY
Chen
Mei-Ru
MR
D002460:Cell Line; D002461:Cell Line, Transformed; D045744:Cell Line, Tumor; D004261:DNA Replication; D020869:Gene Expression Profiling; D015967:Gene Expression Regulation, Viral; D016679:Genome, Viral; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000502:physiology*; D006801:Humans; D017874:Immediate-Early Proteins / Q000378:metabolism*; D020411:Oligonucleotide Array Sequence Analysis; D015534:Trans-Activators / Q000378:metabolism*; D014158:Transcription, Genetic; D014764:Viral Proteins / Q000235:genetics / Q000378:metabolism*; D017735:Virus Latency
C068382:BRLF1 protein, Human herpesvirus 4; D017874:Immediate-Early Proteins; D015534:Trans-Activators; D014764:Viral Proteins