01 August 2008
The inhibitory effect of suramin on telomerase activity and spheroid growth of C6 glioma cells
Mine ErguvenABCDEFG, Nuriye AkevF, Aysegul OzdemirE, Ebru KarabulutB, Ayhan BilirABCDEFMed Sci Monit 2008; 14(8): BR165-173 :: ID: 865765
Abstract
Background
The significant roles of telomerase in carcinogenesis and drug resistance have attracted growing attention as potential therapies. The aim of the study was to investigate the effect of suramin on the telomerase activity of C6 glioma cells and on the growth of C6 glioma spheroids.
Material and Method
C6 rat glioma cells were treated with suramin at doses of 175 and 250 microM, and also with an increasing dosage for 96 hours. The effect of suramin on monolayer and spheroid cultures was determined by evaluating cell proliferation, spheroid growth, bromodeoxyuridine labeling index, changes of spheroid ultrastructure, and telomerase activity.
Results
Suramin inhibited telomerase activity in a dose-dependent manner. Suramin at 250 microM and 175 microM reduced telomerase activity and cell proliferation, spheroid growth, and bromodeoxyuridine labeling index. These groups commonly revealed distorted nuclei (i.e., nucleolus segregation at 250 microM, many vacuoles, vacuole fusions, and smoothing of the cell surface). Contrary to the effects of individually applied suramin, the increased dose of suramin increased telomerase activity but inhibited cell proliferation and bromodeoxyuridine labeling index only at the 24th and 96th hours; it inhibited spheroid growth at the 96th hour. The increased dose of the suramin-treated group showed changes of spheroid ultrastructure similar to those of the control group except for rarely observed vacuoles or vacuole fusion and microvilli.
Conclusions
To the best of our knowledge, this is the first study in the English language to show in vitro cytotoxic effect of suramin via telomerase inhibition on C6 glioma cells and spheroids.
Keywords: Telomerase - antagonists & inhibitors, Suramin - pharmacology, Spheroids, Cellular - ultrastructure, Glioma - pathology, DNA, Neoplasm - biosynthesis, Cell Nucleolus - ultrastructure, Cell Proliferation - drug effects, Tumor Cells, Cultured, Time Factors, Cell Cycle - drug effects, Bromodeoxyuridine - metabolism
Editorial
01 January 2023 : Editorial
Editorial: Current Status of Two Adjuvanted Malaria Vaccines and the World Health Organization (WHO) Strategy to Eradicate Malaria by 2030DOI: 10.12659/MSM.939357
Med Sci Monit 2023; 29:e939357
SARS-CoV-2/COVID-19
26 January 2023 : Editorial
Editorial: The XBB.1.5 (‘Kraken’) Subvariant of Omicron SARS-CoV-2 and its Rapid Global SpreadMed Sci Monit In Press; DOI: 10.12659/MSM.939580
19 January 2023 : Clinical Research
Evaluation of Health-Related Quality of Life and Mental Health in 729 Medical Students in Indonesia During ...Med Sci Monit In Press; DOI: 10.12659/MSM.938892
19 January 2023 : Clinical Research
Determining the Impact of the COVID-19 Pandemic on Dental Care in the Serbian Adult Population: An Online Q...Med Sci Monit 2023; 29:e939238
27 December 2022 : Clinical Research
Effect of Physiotherapy to Correct Rounded Shoulder Posture in 30 Patients During the COVID-19 Pandemic in ...Med Sci Monit 2022; 28:e938926
In Press
27 Jan 2023 : Database Analysis
Association Between Neutrophil-Lymphocyte Ratio and All-Cause Mortality in Critically Ill Patients with Chr...Med Sci Monit In Press; DOI: 10.12659/MSM.938554
27 Jan 2023 : Clinical Research
Proposal for a Simple Equation for Limb Muscle Weight CalculationMed Sci Monit In Press; DOI: 10.12659/MSM.938606
26 Jan 2023 : Editorial
Editorial: The XBB.1.5 (‘Kraken’) Subvariant of Omicron SARS-CoV-2 and its Rapid Global SpreadMed Sci Monit In Press; DOI: 10.12659/MSM.939580
20 Jan 2023 : Clinical Research
A Study of 42 Partially Edentulous Patients with Single-Crown Restorations and Implants to Compare Bone Los...Med Sci Monit In Press; DOI: 10.12659/MSM.939225
Most Viewed Current Articles
13 Nov 2021 : Clinical Research
Acceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...DOI :10.12659/MSM.932788
Med Sci Monit 2021; 27:e932788
30 Dec 2021 : Clinical Research
Retrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...DOI :10.12659/MSM.935379
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review article
A Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...DOI :10.12659/MSM.936292
Med Sci Monit 2022; 28:e936292
01 Jan 2022 : Editorial
Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...DOI :10.12659/MSM.935952
Med Sci Monit 2022; 28:e935952