ArticleiScience2025
Oxidative stress induced protein aggregation via GGCT produced pyroglutamic acid in drug resistant glioblastoma.
Article in iScience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Serum Biomarker Identification of Damp-Heat Pattern in Patients with Chronic Liver Diseases.Chinese journal of integrative medicine · 2026Article
- Cysteine addiction in drug resistant glioblastoma and therapeutic targeting with designer selenium compounds.Neuro-oncology · 2026Article
- Metabolic Landscape of Endometrial Cancer: Insights into Pathway Dysregulation and Metabolic Features.Biomedicines · 2026Article
- Oxidative Stress and Antioxidants in Glioblastoma: Mechanisms of Action, Therapeutic Effects and Future Directions.Antioxidants (Basel, Switzerland) · 2025Review
- Antioxidant nanozymes: current status and future perspectives in spinal cord injury treatments.Theranostics · 2025Review
Corrections and comments
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Authors and funding
15 authors.
Funding
Abstract
Drug resistance is a major barrier to cancer therapies and remains poorly understood. Recently, non-mutational mechanisms of drug resistance have been proposed where a more plastic metabolic response can play a major role. Here, we show that upon drug resistance, glioblastoma (GBM) cells have increased oxidative stress, mitochondria function, and protein aggregation. Gamma (γ)-glutamylcyclotranserase (GGCT), an enzyme in the γ-glutamyl cycle for glutathione production, located on chromosome 7 which is commonly amplified in GBM is also increased upon resistance. We further observe that the byproduct of GGCT-pyroglutamic acid-can bind aggregating proteins and that genetic and pharmacological inhibition of GGCT prevents protein aggregation. Finally, we found increased protein aggregation, GGCT expression, and pyroglutamic acid staining in recurrent GBM patient samples, adjacent non-tumor brain, and Alzheimer's brains. These findings suggest a new pathway for protein aggregation within drug resistant brain cancer that should be further studied in other brain disorders.
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Registered trials
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