Mitochondria-Targeted Prodrug Nanoassemblies for Efficient Ferroptosis-Based Therapy via Devastating Ferroptosis Defense Systems
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View abstract on PubMed
Summary
This summary is machine-generated.This study introduces a novel prodrug nanoassembly that targets cancer cell mitochondria to induce ferroptosis. By disabling defense systems, it enhances lipid peroxidation and promotes cancer cell death.
Area Of Science
- Biomedical Engineering
- Cancer Therapy
- Cell Death Mechanisms
Background
- Ferroptosis, an iron-dependent cell death, is hindered in tumors by defense systems like GPX4 and CoQH2.
- Mitochondria play a key role in ferroptosis, making them a target for therapeutic intervention.
Purpose Of The Study
- To develop a prodrug nanoassembly for targeted mitochondrial lipid peroxidation and ferroptotic cell death induction.
- To overcome tumor resistance to ferroptosis by interfering with cellular defense mechanisms.
Main Methods
- Engineered a single-molecular prodrug nanoassembly (QSSP) combining a DHODH inhibitor (QA) with a triphenylphosphonium moiety via a disulfide linker.
- Utilized acidic conditions within cancer cells to trigger QSSP disassembly and release prodrug molecules.
- Leveraged mitochondrial membrane potential for targeted delivery of lipophilic prodrugs into mitochondria.
Main Results
- Achieved mitochondria-localized GPX4 inactivation through thiol-disulfide exchange and glutathione depletion, initiating ferroptosis.
- Released QA further disrupted mitochondrial defense via the DHODH-CoQH2 system, enhancing ferroptosis.
- Demonstrated effective induction of ferroptosis in cancer cells via the targeted nanoassembly.
Conclusions
- The developed subcellular-targeted nanoassembly effectively induces ferroptosis by targeting mitochondrial defense systems.
- This strategy offers a promising approach for cancer therapy by overcoming resistance to ferroptosis.
- Provides a reference for designing novel ferroptosis-based cancer treatment strategies.
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