Micronuclei and apoptosis in glioma and neuroblastoma cell lines and role of other lesions in the reconstruction of cellular radiosensitivity

2001 ◽  
Vol 40 (4) ◽  
pp. 295-300 ◽  
Author(s):  
J. M. Akudugu ◽  
L. Böhm
Keyword(s):  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Cellular Radiosensitivity ◽  
Neuroblastoma Cell Lines

scholarly journals The Role of MYCN in the Failure of MYCN Amplified Neuroblastoma Cell Lines to G1 Arrest After DNA Damage

Cell Cycle ◽  
2006 ◽  
Vol 5 (22) ◽  
pp. 2639-2647 ◽  
Author(s):  
Emma Bell ◽  
Rakesh Premkumar ◽  
Jane Carr ◽  
Xiaohong Lu ◽  
Penny E Lovat ◽  
...  
Keyword(s):  
Dna Damage ◽  
Cell Lines ◽  
Neuroblastoma Cell ◽  
G1 Arrest ◽  
Neuroblastoma Cell Lines

The role of EGFR trafficking in neuroblastoma

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 20003-20003
Author(s):  
P. E. Zage ◽  
Q. Yan ◽  
L. Zeng ◽  
A. J. Bean
Keyword(s):  
Growth Factor ◽  
Cell Growth ◽  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Growth Factor Receptor ◽  
Growth Factor Receptors ◽  
Human Neuroblastoma ◽  
Degradation Rates ◽  
Neuroblastoma Cell Lines

20003 Background: Signaling through growth factor receptors is important in neuroblastoma pathogenesis. Chromosome 1p36 is commonly deleted in neuroblastoma tumors and is associated with a poor prognosis. UBE4B, a gene in 1p36, has been reported mutated in high- risk neuroblastoma. We have found a direct interaction between UBE4B and hrs, a protein required for epidermal growth factor receptor (EGFR) trafficking, suggesting a link between EGFR trafficking and neuroblastoma pathogenesis. We have analyzed the role of UBE4B in the EGFR pathway in neuroblastoma cell lines. Methods: The expression of UBE4B, hrs and EGFR were analyzed by quantitative Western blot in a panel of 7 human neuroblastoma cell lines (SHEP, SKNAS, SKNSH, KCNR, SY5Y, LA155N, NGP). EGFR degradation rates were determined by examining the kinetics of cellular EGFR depletion following a pulse of ligand. Results: UBE4B levels were lowest in SKNAS and highest in NGP cells. Hrs levels were lowest in SKNSH cells and higher in other cell lines. EGFR levels were lowest in NGP and KCNR and highest in SKNAS cells. UBE4B levels were correlated with known 1p deletions. EGFR degradation rates were slowest in SKNAS cells and therefore correlated with cellular UBE4B levels. The low degradation rates were correlated with high cellular levels of EGFR. Conclusions: Expression levels of UBE4B are correlated in neuroblastoma cell lines with chromosome 1p deletions. Cell lines with lower levels of UBE4B degrade EGFR at a markedly slower rate, correlated with higher cellular EGFR levels. We hypothesize that UBE4B affects cell growth by interacting with hrs, directing EGFR for degradation. In its absence the ability of a cell to sort growth factor receptors for degradation is inhibited, resulting in growth factor receptor overabundance and uncontrolled cell growth. These results support the testing of EGFR inhibitors in a future phase I trial for children with neuroblastoma. No significant financial relationships to disclose.

ROLE OF CASPASE 8 AS A DETERMINANT IN TRAIL SENSITIVITY OF NEUROBLASTOMA CELL LINES

2009 ◽  
Vol 26 (8) ◽  
pp. 549-559 ◽  
Author(s):  
Haixia Tong ◽  
Chunwei Lu ◽  
Yanmin Yang ◽  
Jihong Zhang ◽  
Jinhua Zhang
Keyword(s):  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Caspase 8 ◽  
Neuroblastoma Cell Lines ◽  
Trail Sensitivity

Role of ALK activation in the development and maintenance of the neoplastic phenotype in neuroblastoma

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 10008-10008
Author(s):  
M. Regairaz ◽  
F. Munier ◽  
H. Sartelet ◽  
V. Marty ◽  
M. Castaing ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Antitumor Activity ◽  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Wild Type ◽  
Primary Tumors ◽  
Normal Tissues ◽  
Anaplastic Lymphoma ◽  
Neuroblastoma Cell Lines

10008 Background: Activating mutations of the Anaplastic Lymphoma Kinase (ALK) receptor could be responsible for most familial neuroblastoma cases and for up to 15% of somatic cases. The objective of the present study was to further investigate the role of ALK activation in neuroblastoma. Methods: Tissue microarrays were constructed containing 101 primary tumors and 56 paired normal tissues. Sections were immunostained with anti-ALK or anti-P-ALK antibodies, and with antibodies directed against the ALK ligands: PTN (Pleiotrophin) or MDK (Midkine). The Wilcoxon signed rank test was applied for comparison of paired data. Associations with prognostic factors were analyzed using t-tests. Effects of the ALK inhibitor TAE684 (Novartis) on cell proliferation and signaling was evaluated in wild-type or mutated ALK neuroblastoma cell lines and xenografts. Results: ALK was expressed in about 100% of tumors and normal tissues, while phospho-ALK was detected in 5% of normal tissues and 50% of tumors. Sequencing of the kinase domain of ALK showed that its phosphorylation was largely independent of mutations and we found that MDK and PTN ligands were expressed in 66% and 50% of tumors, respectively. Interestingly, ALK, P-ALK, and MDK were expressed at higher levels in tumors as compared with paired normal tissues (p < 0.0001), while PTN showed an inverse tendency, being more expressed in normal tissues (p = 0.07). In tumors, P-ALK was associated with good-prognosis factors, including favorable stages (p = 0.01), absence of MYCN amplification (p = 0.05) and a younger age at diagnosis (p = 0.03). Inhibition of cell proliferation by TAE684 was detectible in all neuroblastoma cell lines, regardless of ALK status. However, TAE684 failed to demonstrate antitumor activity in advanced stage neuroblastoma xenografts expressing either a wild-type or a mutated ALK. Interestingly, ALK pathway activation (P-STAT3, P-AKT) was weak or barely detectible in these xenografts. Conclusions: ALK activation occurs during neuroblastoma oncogenesis, along with a concomitant switch between the expressions of PTN and MDK. However, ALK may not be a relevant therapeutic target since in vivo inhibition showed no antitumor activity. [Table: see text]

The DNA-binding protein YB-1 is a direct MYCN target and influences repair and resistance in neuroblastoma cell lines

2010 ◽  
Vol 222 (03) ◽  
Author(s):  
S Degen ◽  
S Kuhfittig-Kulle ◽  
JH Schulte ◽  
F Westermann ◽  
A Schramm ◽  
...  
Keyword(s):  
Dna Binding ◽  
Cell Lines ◽  
Binding Protein ◽  
Neuroblastoma Cell ◽  
Dna Binding Protein ◽  
Neuroblastoma Cell Lines

Negative and positive effects of an IAP-LTR on nearby Pcdaα gene expression in the central nervous system and neuroblastoma cell lines

Gene ◽  
2004 ◽  
Vol 337 ◽  
pp. 91-103 ◽  
Author(s):  
Hidehiko Sugino ◽  
Tomoko Toyama ◽  
Yusuke Taguchi ◽  
Shigeyuki Esumi ◽  
Mitsuhiro Miyazaki ◽  
...  
Keyword(s):  
Gene Expression ◽  
Central Nervous System ◽  
Nervous System ◽  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Positive Effects ◽  
The Central Nervous System ◽  
Neuroblastoma Cell Lines

scholarly journals The Anti-Tumor Activity of the NEDD8 Inhibitor Pevonedistat in Neuroblastoma

2021 ◽  
Vol 22 (12) ◽  
pp. 6565
Author(s):  
Jennifer H. Foster ◽  
Eveline Barbieri ◽  
Linna Zhang ◽  
Kathleen A. Scorsone ◽  
Myrthala Moreno-Smith ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Lines ◽  
Neuroblastoma Cell ◽  
Wild Type ◽  
Tumor Weight ◽  
Cycle Arrest ◽  
P53 Status ◽  
Neuroblastoma Cell Lines ◽  
Anti Tumor Activity

Pevonedistat is a neddylation inhibitor that blocks proteasomal degradation of cullin–RING ligase (CRL) proteins involved in the degradation of short-lived regulatory proteins, including those involved with cell-cycle regulation. We determined the sensitivity and mechanism of action of pevonedistat cytotoxicity in neuroblastoma. Pevonedistat cytotoxicity was assessed using cell viability assays and apoptosis. We examined mechanisms of action using flow cytometry, bromodeoxyuridine (BrDU) and immunoblots. Orthotopic mouse xenografts of human neuroblastoma were generated to assess in vivo anti-tumor activity. Neuroblastoma cell lines were very sensitive to pevonedistat (IC50 136–400 nM). The mechanism of pevonedistat cytotoxicity depended on p53 status. Neuroblastoma cells with mutant (p53MUT) or reduced levels of wild-type p53 (p53si-p53) underwent G2-M cell-cycle arrest with rereplication, whereas p53 wild-type (p53WT) cell lines underwent G0-G1 cell-cycle arrest and apoptosis. In orthotopic neuroblastoma models, pevonedistat decreased tumor weight independent of p53 status. Control mice had an average tumor weight of 1.6 mg + 0.8 mg versus 0.5 mg + 0.4 mg (p < 0.05) in mice treated with pevonedistat. The mechanism of action of pevonedistat in neuroblastoma cell lines in vitro appears p53 dependent. However, in vivo studies using mouse neuroblastoma orthotopic models showed a significant decrease in tumor weight following pevonedistat treatment independent of the p53 status. Novel chemotherapy agents, such as the NEDD8-activating enzyme (NAE) inhibitor pevonedistat, deserve further study in the treatment of neuroblastoma.

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