Upregulation of MDM2-like p53 binding protein (arrow) following adenovirus-based TNFaRp55 gene transfer into rheumatoid synovial fibroblasts. (Analysis performed by Elena Neumann, University of Regensburg, Germany, using a Clontech Atlas® DNA array system. TNFaRp55 Ad5 generously provided by Dr John Mountz, University of Birmingham, AL, USA.)