Microarray analyses of differentially expressed human genes and biological processes in ECV304 cells infected with rubella virus.

Changes in mRNA expression levels of ECV304 cells infected with the wild-type rubella strain were analyzed using a microarray system representing 18,716 human genes. Four hundred eighty-seven genes exhibited differential expression levels; 456 of these genes were up-regulated while 31 genes were down-regulated. We identified 53 biological processes that were significantly relevant to the RV-infection. Among these biological processes, 52 were one-gene processes and one was a process involving five genes: IFNA21 (interferon, alpha 21), interferon stimulated exonuclease gene 20 kDa (ISG20), zinc finger protein 175 (ZNF175), tripartite motif-containing 22 (TRIM22), and MX2 [myxovirus (influenza virus) resistance 2 (mouse)]. Except for ZNF175, gene annotation indicated four of these genes encoded interferon or interferon-induced genes. These results suggest that genes relevant to interferon-regulated pathways may be involved in the pathogenesis of rubella.