scholarly journals Knockdown of Ras-Related Protein 25 (Rab25) Inhibits the In Vitro Cytotoxicity and In Vivo Antitumor Activity of Human Glioblastoma Multiforme Cells

Author(s):  
Bingqian Ding ◽  
Bei Cui ◽  
Ming Gao ◽  
Zhenjiang Li ◽  
Chenyang Xu ◽  
...  
1997 ◽  
Vol 52 (1-2) ◽  
pp. 49-54 ◽  
Author(s):  
Daniel N. Kushev ◽  
Nadejda C. Spassovska ◽  
Svetoslav I. Taxirov ◽  
Konstantin C. Grancharov

AbstractNew platinum(II) complexes of cyclohexanecarboxylic acid hydrazide (chcah) were synthesized and characterized by elemental analysis, IR. and 1H NMR spectra. Their inhibitory effects on cell growth and macromolecular synthesis of Friend leukemia cells in culture as well as the in vivo antitumor activity towards L1210 leukemia in mice were compared with those of complexes containing differently substituted aromatic acid hydrazides. Some of the complexes exhibited antineoplastic activity. No correlation between the in vitro cytotoxicity and the in vivo antitumor activity was found. However, there was a relationship between the in vitro macromolecular synthesis inhibition profile and the in vivo antineoplastic effect, similar to that of cisplatin. On the other hand, only agents containing one ammine ligand were active in vivo. The substitution of the aromatic ring by a cycloalkane residue increased significantly the antitumor effect, with [Pt(NH3)(chcah)Cl2] being the most active compound in this study.


2015 ◽  
Vol 7 (2) ◽  
pp. 198 ◽  
Author(s):  
C Gayatri ◽  
CUma Maheswara Reddy ◽  
K Chitra ◽  
V Parthasarathy

2013 ◽  
Vol 56 (7) ◽  
pp. 2911-2935 ◽  
Author(s):  
Khondaker M. Rahman ◽  
Paul J. M. Jackson ◽  
Colin H. James ◽  
B. Piku Basu ◽  
John A. Hartley ◽  
...  

2011 ◽  
Vol 317 (11) ◽  
pp. 1513-1526 ◽  
Author(s):  
Marie-Thérése Stockhausen ◽  
Helle Broholm ◽  
Mette Villingshøj ◽  
Maria Kirchhoff ◽  
Tommy Gerdes ◽  
...  

2016 ◽  
Vol 68 (5) ◽  
pp. 1909-1923 ◽  
Author(s):  
Ravishankar Kumar ◽  
Nitesh Kumar ◽  
Grandhi V. Ramalingayya ◽  
Manganahalli Manjunath Setty ◽  
Karkala Sreedhara Rangnath Pai

2021 ◽  
Vol 22 (13) ◽  
pp. 6781
Author(s):  
Anna Kirstein ◽  
Daniela Schilling ◽  
Stephanie E. Combs ◽  
Thomas E. Schmid

Background: Treatment resistance of glioblastoma multiforme to chemo- and radiotherapy remains a challenge yet to overcome. In particular, the O6-methylguanine-DNA-methyltransferase (MGMT) promoter unmethylated patients have only little benefit from chemotherapy treatment using temozolomide since MGMT counteracts its therapeutic efficacy. Therefore, new treatment options in radiotherapy need to be developed to inhibit MGMT and increase radiotherapy response. Methods: Lomeguatrib, a highly specific MGMT inhibitor, was used to inactivate MGMT protein in vitro. Radiosensitivity of established human glioblastoma multiforme cell lines in combination with lomeguatrib was investigated using the clonogenic survival assay. Inhibition of MGMT was analyzed using Western Blot. Cell cycle distribution and apoptosis were investigated to determine the effects of lomeguatrib alone as well as in combination with ionizing radiation. Results: Lomeguatrib significantly decreased MGMT protein and reduced radiation-induced G2/M arrest. A radiosensitizing effect of lomeguatrib was observed when administered at 1 µM and increased radioresistance at 20 µM. Conclusion: Low concentrations of lomeguatrib elicit radiosensitization, while high concentrations mediate a radioprotective effect.


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