2004
DOI: 10.1515/pteridines.2004.15.3.91
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Interferon-y-Induced Growth Inhibition of Neuroblastoma Cells is Independent of Induction of Nitric Oxide Synthase and Indoleamine 2,3-dioxygenase

Abstract: We investigated a possible involvement of nitric oxide formed by inducible nitric oxide synthase (iNOS) in the signaling cascade leading to growth inhibition and differentiation in the human neuroblastoma cell line SK-NSII. Treatment of SK-N-SH with interferon-γ (IFN-γ) plus interleukin-lß (IL-lß) led to induction of iNOS, growth inhibition and an altered cell shape. However two inhibitors of iNOS were not able to prevent cytokine induced changes. In addition, IFN-γ alone led to growth inhibition in absence of… Show more

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“…The efficacy of all extracts on suppressing NO levels and the percentage viability (%) of pretreated BV-2 cells at the tested concentrations are shown in Figure 3. It should be pointed out that the Griess assay could not be performed on the neuroblastoma SK-N-SH cells as a single stimulant, as LPS showed no effect on iNOS levels; however, it could be performed in combination with a stimulant [40]. The results in Figure 3 show that all the concentrations of the extracts studied were able to reduce the synthesis and release of NO.…”
Section: Inhibitory Effects Of Ct Extracts On No Secretion In Lps-ind...mentioning
confidence: 99%
“…The efficacy of all extracts on suppressing NO levels and the percentage viability (%) of pretreated BV-2 cells at the tested concentrations are shown in Figure 3. It should be pointed out that the Griess assay could not be performed on the neuroblastoma SK-N-SH cells as a single stimulant, as LPS showed no effect on iNOS levels; however, it could be performed in combination with a stimulant [40]. The results in Figure 3 show that all the concentrations of the extracts studied were able to reduce the synthesis and release of NO.…”
Section: Inhibitory Effects Of Ct Extracts On No Secretion In Lps-ind...mentioning
confidence: 99%
“…In vitro, διαφορετικά μορφογόνα ή ορισμένοι χημικοί παράγοντες μπορούν να κατευθύνουν σε ένα μεγάλο ποσοστό την μετατροπή τους ως προς μια συγκεκριμένη κατεύθυνση, για παράδειγμα, η παρουσία ρετινοικού οξέως (RA), είναι ικανή να οδηγήσει στον εμπλουτισμό της καλλιέργειας με κύτταρα τύπου Ν ενώ η επεξεργασία με BrdU εμπλουτίζει την καλλιέργεια σε κύτταρα τύπου S [20]. [25], [26], [27]. Επακόλουθο της αναστολής του πολλαπλασιασμού αποτελεί η πιο αποτελεσματική διαφοροποίηση των κυττάρων, όπως υποδηλώνεται απο την αύξηση του μήκους των νευριτών και την επαγωγή χαρακτηριστικών δεικτών της νευρικής διαφοροποίησης [28], [29].…”
Section: κυτταρική ετερογένεια του νευροβλαστώματοςunclassified