ArticlePloS one2015
Temozolomide Resistance in Glioblastoma Cell Lines: Implication of MGMT, MMR, P-Glycoprotein and CD133 Expression.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 106 papers, 3 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
106 citing papers in PubMed, 3 syntheses or guidelines pooled it, 188 citations in OpenAlex.
- Pooled it
- Bibliometric and visualization analysis in the field of epigenetics and glioma (2009-2024).Frontiers in oncology · 2024Pooled it
- Glioblastoma multiforme (GBM): An overview of current therapies and mechanisms of resistance.Pharmacological research · 2021Pooled it
- METTL3 Increases Temozolomide Resistance in MGMT-Negative Glioblastoma by Enhancing CBX5 mRNA Stability in an mCNS neuroscience & therapeutics · 2026Article
- IDH-Mutant Diffuse Glioma: From Metabolic Origins to Targeted Therapy.Journal of clinical medicine · 2026Review
- Association Between Temozolomide Resistance and Long Non-Coding RNA Expression Profiles in Glioblastoma Cell Lines.Pharmaceuticals (Basel, Switzerland) · 2026Article
- From Therapeutic Drug to Xenobiotic in Cancer Repurposing: Clozapine Mechanisms, Metabolic Liabilities, and Human-Relevant Translational Approaches.Journal of xenobiotics · 2026Review
- Therapeutic Potential of Tetrandrine Compared to Temozolomide in Treating Glioblastoma Multiforme Under Normoxic and Hypoxic Conditions.International journal of molecular sciences · 2026Article
- MAGMAS Inhibition Enhances Temozolomide Efficacy in Chemotherapy-Resistant Glioblastoma Models.Cancer research communications · 2026Article
- Lactoferrin-Decorated PLGA Nanoparticles for Targeted Tamoxifen Repurposing in Glioblastoma Cells.Polymers · 2026Article
- Overcoming Intrinsic and Acquired Temozolomide Resistance in Glioblastoma: Fisetin as a Potential Strategy to Enhance Sensitivity via ZEB1 Modulation.Turkish journal of pharmaceutical sciences · 2026Article
- Selinexor enhances temozolomide efficacy in glioblastoma through modulation of multiple resistance-associated mechanisms.Frontiers in oncology · 2026Article
- The Omega-3 Fatty Acids Eicosapentaenoic Acid and Docosahexaenoic Acid Enhance the Effects of Temozolomide Chemotherapy in Glioblastoma Cells.International journal of molecular sciences · 2025Article
- Apoptotic and senolytic effects of hERG/Eag1 channel blockers in combination with temozolomide in human glioblastoma cells.Naunyn-Schmiedeberg's archives of pharmacology · 2025Article
- Targeted Fluoxetine Delivery Using Folic Acid-Modified PLGA Nanoparticles for Selective Uptake by Glioblastoma Cells.Pharmaceutics · 2025Article
- Review
- Photoactivatable Cyclometalated Ir(III) Compound Penetrates the Blood-Brain Barrier in 3D Spheroidal and Advanced 3D Organoid Models of Inherently Resistant and Aggressive Brain Tumors.ACS pharmacology & translational science · 2025Article
- Bypassing Blood-Brain Barrier and Glucose Dependency of Anti-Glioblastoma Drug Candidates Targeting Mitochondrial Respiration.Journal of cellular physiology · 2025Article
- Cardiolipin Dysregulation in Glioblastoma-Effects on Mitochondrial Function Tumor Cell Death and Sensitivity to Mitochondria-Targeting Drugs.Journal of cellular physiology · 2025Review
- Functional 3D Human Neuron-Glioblastoma Model Reveals Cellular Interactions Enabling Drug Safety Assessments.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025Article
46 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe use of temozolomide (TMZ) has improved the prognosis for glioblastoma multiforme patients. However, TMZ resistance may be one of the main reasons why treatment fails. Although this resistance has frequently been linked to the expression of O6-methylguanine-DNA methyltransferase (MGMT) it seems that this enzyme is not the only molecular mechanism that may account for the appearance of drug resistance in glioblastoma multiforme patients as the mismatch repair (MMR) complex, P-glycoprotein, and/or the presence of cancer stem cells may also be implicated.
methodsFour nervous system tumor cell lines were used to analyze the modulation of MGMT expression and MGMT promoter methylation by TMZ treatment. Furthermore, 5-aza-2'-deoxycytidine was used to demethylate the MGMT promoter and O(6)-benzylguanine to block GMT activity. In addition, MMR complex and P-glycoprotein expression were studied before and after TMZ exposure and correlated with MGMT expression. Finally, the effect of TMZ exposure on CD133 expression was analyzed.
resultsOur results showed two clearly differentiated groups of tumor cells characterized by low (A172 and LN229) and high (SF268 and SK-N-SH) basal MGMT expression. Interestingly, cell lines with no MGMT expression and low TMZ IC50 showed a high MMR complex expression, whereas cell lines with high MGMT expression and high TMZ IC50 did not express the MMR complex. In addition, modulation of MGMT expression in A172 and LN229 cell lines was accompanied by a significant increase in the TMZ IC50, whereas no differences were observed in SF268 and SK-N-SH cell lines. In contrast, P-glycoprotein and CD133 was found to be unrelated to TMZ resistance in these cell lines.
conclusionsThese results may be relevant in understanding the phenomenon of TMZ resistance, especially in glioblastoma multiforme patients laking MGMT expression, and may also aid in the design of new therapeutic strategies to improve the efficacy of TMZ in glioblastoma multiforme patients.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.