Abstract：
:Neuroblastoma (NB), a tumor originating from the sympathetic nervous system, is the most common extracranial neurological tumor of childhood. Human NB cells may differentiate in vitro under treatment with biological agents, as gamma-interferon (IFN-gamma) and tumor necrosis factor (TNF). Unfortunately, NB cell lines resistant to the differentiation-inducing effects of both drugs have been observed. Here we demonstrate that a combination of IFN-gamma plus TNF causes extensive and generalized differentiation of NB cells toward a neuronal phenotype. Both IFN-gamma and TNF, given alone, moderately reduced cell growth and induced partial morphological maturation. Their combination further reduced cell proliferation. The combined treatment gave a synergistic rather than additive cytostatic effect, documented also by a dramatically enhanced differentiation toward a neuronal morphology. Membrane immunofluorescence showed a homologous and heterologous up-regulation of IFN-gamma receptor, as well as a marked induction of HLA Class I antigens and, to a lesser extent, of Class II antigens on NB cells induced to differentiate. Treatment of NB cell lines with IFN-gamma/TNF results in the induction of a differentiated phenotype, as indicated by the increased expression of the Mr 160,000 and 200,000 neurofilament proteins and that of microtubule-associated proteins. Evaluation of biochemical markers of neuronal differentiation confirmed the ability of the combined treatment to induce neuroblast maturation. These results suggest that the combination of IFN-gamma and TNF should be considered for experimental clinical trials in neuroblastoma.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Ponzoni M,Casalaro A,Lanciotti M,Montaldo PG,Cornaglia-Ferraris Psubject
Has Abstractpub_date
1992-02-15 00:00:00pages
931-9issue
4eissn
0008-5472issn
1538-7445journal_volume
52pub_type
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