Phosphocreatine Promotes Epigenetic Reprogramming to Facilitate Glioblastoma Growth Through Stabilizing BRD2
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View abstract on PubMed
Summary
This summary is machine-generated.Glioblastoma stem cells produce phosphocreatine (PCr) to protect the BRD2 protein, promoting tumor growth. Inhibiting PCr production with cyclocreatine halts glioblastoma growth and enhances BRD2 inhibitor effectiveness.
Area Of Science
- Oncology
- Metabolic Research
- Epigenetics
Background
- Glioblastoma (GBM) displays significant metabolic adaptability, contributing to its survival and resistance to therapies.
- The precise mechanisms driving GBM's metabolic plasticity and therapeutic resistance are not fully understood.
Purpose Of The Study
- To elucidate the role of phosphocreatine (PCr) production in GBM stem cell reprogramming and therapeutic resistance.
- To investigate the potential of targeting PCr biosynthesis as a therapeutic strategy for GBM.
Main Methods
- Analysis of GBM stem cell metabolism and epigenetic modifications.
- Investigating the interaction between PCr, Zinc finger E-box binding homeobox 1, and bromodomain containing protein 2 (BRD2).
- Utilizing cyclocreatine (cCr) to disrupt PCr biosynthesis in preclinical GBM models.
Main Results
- GBM stem cells elevate PCr production via increased brain-type creatine kinase transcription, mediated by Zinc finger E-box binding homeobox 1.
- PCr inhibits BRD2 ubiquitination and degradation by competing with the E3 ligase SPOP.
- Cyclocreatine treatment leads to BRD2 degradation, reduced cell proliferation, and significant tumor growth inhibition in mouse models.
- Cyclocreatine enhances the efficacy of BRD2 inhibitors in GBM models with no observed side effects.
Conclusions
- High PCr production is a critical, druggable metabolic vulnerability in GBM.
- Targeting PCr biosynthesis represents a promising therapeutic avenue for glioblastoma treatment.
- Disrupting PCr metabolism impacts epigenetic regulation and cell division, offering a novel strategy against GBM.
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