title: CD30-induced signaling is absent in Hodgkin's cells but present in anaplastic large cell lymphoma cells.
abstract: High CD30 expression in classical Hodgkin's lymphoma and anaplastic large cell lymphoma (ALCL) suggests an important pathogenic role of this cytokine receptor. To test this hypothesis, we investigated CD30 signaling in Hodgkin's and ALCL cell lines by different approaches: 1) CD30 stimulation, 2) CD30 down-regulation, and 3) a combination of both. The effects were determined at the RNA (microarray and real-time quantitative RT-PCR), protein (electrophoretic mobility shift analysis, immunoblot, and flow cytometry), and cellular/functional (proliferation and apoptosis) levels. We demonstrate that Hodgkin's cells are virtually CD30 unresponsive. Neither CD30 stimulation nor CD30 silencing of Hodgkin's cells had any significant effect. In contrast, CD30 stimulation of ALCL cells activated nuclear transcription factor-kappaB (NF-kappaB), induced major transcriptional changes, and decreased proliferation. These effects could be abrogated by down-regulation of CD30. Stimulation of CD30 in ALCL cells, stably transfected with a dominant-negative NF-kappaB inhibitor, induced pronounced caspase activation and massive apoptosis. Our data indicate that 1) CD30 signaling is not effective in Hodgkin's cell lines but is effective in ALCL cell lines, 2) CD30 is probably not significantly involved in the pathogenesis of classical Hodgkin's lymphoma, and 3) CD30 stimulation triggers two competing effects in ALCL cells, namely activation of caspases and NF-kappaB-mediated survival. These data suggest that CD30-targeted therapy in ALCL should be combined with NF-kappaB inhibitors to induce effective cell killing.
authors.affiliation: Charité-University Medicine Berlin, Campus Benjamin Franklin, Institute of Pathology, D-12200 Berlin, Germany. burkhard.hirsch@charite.de
authors.forename: Burkhard
authors.initials: B
authors.lastname: Hirsch
authors.forename: Michael
authors.initials: M
authors.lastname: Hummel
authors.forename: Stefan
authors.initials: S
authors.lastname: Bentink
authors.forename: Fariba
authors.initials: F
authors.lastname: Fouladi
authors.forename: Rainer
authors.initials: R
authors.lastname: Spang
authors.forename: Raphael
authors.initials: R
authors.lastname: Zollinger
authors.forename: Harald
authors.initials: H
authors.lastname: Stein
authors.forename: Horst
authors.initials: H
authors.lastname: Dürkop
mesh_terms: D017209:Apoptosis / Q000502:physiology; D020169:Caspases / Q000378:metabolism; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D024202:Electrophoretic Mobility Shift Assay; D004789:Enzyme Activation / Q000502:physiology; D005434:Flow Cytometry; D015870:Gene Expression; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006689:Hodgkin Disease / Q000378:metabolism*; D006801:Humans; D015151:Immunoblotting; D017730:Ki-1 Antigen / Q000378:metabolism*; D017728:Lymphoma, Large-Cell, Anaplastic / Q000378:metabolism*; D016328:NF-kappa B / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D034741:RNA, Small Interfering; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000502:physiology*; D014162:Transfection
chemical_list: D017730:Ki-1 Antigen; D016328:NF-kappa B; D034741:RNA, Small Interfering; D020169:Caspases