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A monoclonal antibody, MI/N1, is described that reacts predominantly with fresh neuroblastoma tissue, human neuroblastoma cell lines, and cells of the myeloid lineage. Investigation of the binding of this antibody to four different neuroblastoma cell lines showed CHP 100 bound approximately 4 times more antibody than CHP 126. Read more >
Deferoxamine previously has been shown to have potent activity in vitro against human neuroblastoma cells, activity that results from its ability to chelate iron. To further understand the mechanism of deferoxamine-induced cytotoxicity, we looked at its effects on cell cycling and on DNA, RNA, and protein synthesis by CHP 126, a cell line that is derived from tumor tissue of a patient with a neuroblastoma and that is known to be drug sensitive. Read more >
Ferritin is an iron-containing protein which is a normal component of serum. The levels of ferritin are increased in the sera of some children with neuroblastoma, and this increase appears to be a potent indicator of prognosis. To determine whether synthesis of ferritin by the tumor cells contributes to these increased serum levels, we examined incorporation of radiolabeled leucine by CHP 126, a neuroblastoma derived cell line, into ferritin. Read more >
Natural killer (NK) cells and NK cell activity were determined in three groups (newly diagnosed [n = 21], on therapy [n = 21], and off therapy [n = 18]) of children with various types of malignant solid tumors and in a control group (n = 26) by means of Leu-7 and Leu-11b monoclonal antibodies and a 4-hour 51Cr-release assay, respectively. Read more >
Neuroblastoma cell lines are useful for the investigation of neuronal receptor regulation since these cells display various neuronal features. Here we report the analysis of human AMPA and kainate receptor expression in four neuroblastoma cell lines (SK-N-MC, IMR-32, CHP 126 and NMB/N7). The reverse transcriptase-polymerase chain reaction (RT-PCR) demonstrated the presence of hGluR1, hGluR4 and EAA4 transcripts in all four cell lines whereas hGluR3 mRNA was undetectable. Read more >
Neuroblastoma is a pediatric solid tumor refractory to eradication by chemotherapy. To determine whether Aloe vera (AV), a pontial anticancer reagent, could be useful in neuroblastoma therapy, we investigated the anti-proliferative effects of an AV protein extract.
That ferritin, an iron storage protein, can be produced by neuroblastoma cells raises the possibility that iron may have some role in promoting tumor cell growth. To explore this possibility, we studied the effects of desferoxamine, a compound which chelates iron, on viability of CHP 126 and CHP 100, two human neuroblastoma cell lines. Read more >
The ability to express exogenous mammalian genes stably in post-mitotic cells such as neurons remains an important goal for those attempting to modulate neurotransmission through gene delivery. We therefore investigated how differentiation to a post-mitotic state affected the expression of an exogenous gene encoding for neuropeptide Y (NPY) following transfection with an adeno-associated virus (AAV) derived vector. Read more >
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