4.3 Review

The Application of Biomedicine in Chemodynamic Therapy: From Material Design to Improved Strategies

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Junjie Qi et al.

Summary: The Fenton reaction, catalyzed by ferrous ions, decomposes hydrogen peroxide to generate hydroxyl radicals. In this review, the mechanisms, strategies, and biological applications of nanomaterial-modulated Fenton reaction are summarized. The challenges and future directions of NMM-Fenton and its applications in chemodynamic therapy are described.

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GSH-Responsive Organosilica Hybrid Nanosystem as a Cascade Promoter for Enhanced Starvation and Chemodynamic Therapy

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Summary: In this study, a glutathione-responsive organosilica hybrid micelle system was developed for enhanced starvation therapy and chemodynamic therapy. The system utilizes the catalytic activity of glucose oxidase to consume glucose and oxygen within tumor cells, generating hydrogen peroxide which is then decomposed to release oxygen. Simultaneously, the system can deplete glutathione in the tumor microenvironment and catalyze hydrogen peroxide to generate highly toxic hydroxyl radicals for chemodynamic therapy. The results demonstrate the significant antitumor efficacy of this system in both in vitro and in vivo experiments.

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Programmable phthalocyanine-iron-based nanoreactor for fluorescence/magnetic resonance dual-modality imaging-guided sono/chemodynamic therapies

Dong Li et al.

Summary: In this study, a novel nanoreactor FeS2@PcD, programmatically regulated by the bivariate factors of H+ and H2O2 in the tumor microenvironment (TME), was designed for specific fluorescence and MR dual-modality imaging-guided sono/chemodynamic therapies, representing a promising precision medicine approach.

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A review on reactive oxygen species (ROS)-inducing nanoparticles activated by uni- or multi-modal dynamic treatment for oncotherapy

Jinyong Lin et al.

Summary: Cancer cells are more susceptible to oxidative stress and nanomaterials-based therapies that generate reactive oxygen species (ROS) have been effective in eliminating cancer cells. These therapies, including chemodynamic therapy, photodynamic therapy, sonodynamic therapy, as well as multi-modal therapies such as combination therapy, have shown significant inhibition of tumor growth. However, the limitations of multi-modal therapy in material preparation and operation protocols hinder its clinical application. Cold atmospheric plasma (CAP), as a reliable source of ROS, light, and electromagnetic fields, provides a simple alternative for implementing multi-modal treatments. Therefore, the emerging field of tumor precision medicine is expected to benefit from these promising multi-modal therapies based on ROS-generating nanomaterials and reactive media like CAPs.

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Guiding Transition Metal-Doped Hollow Cerium Tandem Nanozymes with Elaborately Regulated Multi-Enzymatic Activities for Intensive Chemodynamic Therapy

Shuming Dong et al.

Summary: The authors developed a hollow mesoporous Mn/Zr-co-doped CeO2 tandem nanozyme (PHMZCO-AT) with regulated multi-enzymatic activities to disrupt the H2O2 homeostasis, achieve intensive NCDT, and induce tumor apoptosis and death. The nanozyme catalyzes the conversion of superoxide anion into H2O2 in the tumor region and inhibits the off-target decomposition of H2O2. The elevated H2O2 is then converted into toxic hydroxyl radicals, leading to tumor cell death.

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Long Zhao et al.

Summary: This study developed a Fe-based metal-organic framework as a carrier for the drug Juglone to enhance the CDT efficacy by increasing intracellular H2O2 concentration and inhibiting Pin1. The released Fe ions trigger the Fenton reaction to produce cytotoxic hydroxyl radical, achieving significant antitumor effects. The results demonstrate the potential of drug/CDT synergistic therapy for cancer treatment.

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Magnetic-Optical Imaging for Monitoring Chemodynamic Therapy

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Summary: Chemodynamic therapy utilizes reactive oxygen species generated by endogenous triggers in the tumor microenvironment to kill cancer cells. Despite the recent progress in this field, challenges such as unknown catalytic activity of therapy reagents and unpredictable treatment effects still exist. It is necessary to reveal the therapeutic mechanism of chemodynamic therapy and develop self-monitoring probes to address these challenges.

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Bao Jiang et al.

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Jun Li et al.

Summary: A novel theranostic nanomedicine Fe-CD was developed for fluorescence imaging-guided GSH depletion and cancer therapy in the tumor microenvironment. Fe-CD not only generated abundant hydroxyl radicals under H2O2 but also monitored successful GSH depletion through fluorescence imaging, enhancing the effect of chemodynamic therapy.

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Chenyang Jia et al.

Summary: Chemodynamic therapy (CDT) is a novel cancer treatment strategy that generates hydroxyl radicals in the tumor region using Fenton or Fenton-like reactions. It has advantages such as low side effects, independence from external stimulation, modulation of the tumor microenvironment, and low treatment cost. CDT can also be combined with other therapies to enhance anticancer effects.
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An Ultrasmall Fe3O4-Decorated Polydopamine Hybrid Nanozyme Enables Continuous Conversion of Oxygen into Toxic Hydroxyl Radical via GSH-Depleted Cascade Redox Reactions for Intensive Wound Disinfection

Jiayu Xiao et al.

Summary: This study demonstrates a smart nanozyme that efficiently consumes GSH, provides abundant H2O2, and ultimately enhances the antibacterial performance of CDT through photothermal effects and cascade catalytic reactions. The nanozyme exhibits excellent antibacterial properties against both Staphylococcus aureus and Escherichia coli.
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γ-Fe2O3 Loading Mitoxantrone and Glucose Oxidase for pH-Responsive Chemo/Chemodynamic/Photothermal Synergistic Cancer Therapy

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Summary: This study presents a new therapeutic nanoplatform for synergistic cancer therapy using photoacoustic imaging-guided chemo/chemodynamic/photothermal (CT/CDT/PTT) approaches. The synthesized nanoplatform showed selective accumulation at tumor sites and demonstrated significant synergistic therapeutic effects in vitro and in vivo.

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Ying Huang et al.

Summary: In this study, a multistage chemodynamic therapy (CDT) specific to tumor cells is proposed, which can efficiently deplete the high glutathione (GSH) content in tumor cells. By consuming reserved GSH and inhibiting GSH synthesis in cancer cells, the CDT achieves potent GSH exhaustion. The glycolysis inhibitor used in this study not only increases the sensitivity of tumor cells to CDT, but also stimulates a protective mode in normal cells. This tumor-specific CDT utilizes the responsiveness of the glycolysis inhibitor and nanocarrier to the tumor microenvironment.

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Kai Dong et al.

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A targeted and efficient CDT system with photocatalytic supplement of H2O2 and hydroxyl radical production at a neutral pH

Xuwen Da et al.

Summary: In this study, a new approach using old compounds was developed to overcome the bottleneck problems in chemodynamic therapy (CDT). By harnessing photo-catalysis and conversion reactions, a highly efficient, selective, and photo-controlled CDT system was successfully constructed.

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Wenbao Zuo et al.

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BIOMATERIALS (2021)

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Shu-Lan Li et al.

Summary: Chemodynamic therapy (CDT) uses endogenous chemical energy in the tumor microenvironment for treatment, converting hydrogen peroxide into reactive oxygen species for oncotherapy. However, limitations in the tumor microenvironment hinder CDT efficacy, and the development of nanotechnology offers potential solutions to improve CDT efficiency.

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Ultrasensitive Chemodynamic Therapy: Bimetallic Peroxide Triggers High pH-Activated, Synergistic Effect/H2O2 Self-Supply-Mediated Cascade Fenton Chemistry

Hao Zhou et al.

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Hailong Tian et al.

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Zhimei Xiao et al.

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ADVANCED FUNCTIONAL MATERIALS (2021)

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A Robust ROS Generation Strategy for Enhanced Chemodynamic/Photodynamic Therapy via H2O2/O2 Self-Supply and Ca2+ Overloading

Jie Shen et al.

Summary: The smart polyethylene glycol (PEG)-ylated nanosystem CaO2@ZIF-Fe/Ce6@PEG (CaZFCP) is designed to supply H2O2/O-2 and cause Ca2+ overloading in tumor cells, enhancing the efficacy of chemodynamic therapy (CDT) and photodynamic therapy (PDT) simultaneously. The CaZFCP releases CaO2 nanoparticles, Fe2+, and photosensitizer Chlorin e6 (Ce6) in the weakly acidic tumor microenvironment, alleviating the deficiency of endogenous H2O2 and hypoxia in the tumor area, leading to enhanced production of hydroxyl radicals and singlet oxygen for improved CDT and PDT. Additionally, the Ca2+ overloading induced by CaO2 decomposition amplifies intracellular oxidative stress, resulting in mitochondrial dysfunction and further enhancing the efficacy of combined CDT/PDT. The in vitro and in vivo experimental results confirm the excellent tumor inhibition effect of CaZFCP, providing a simple paradigm for ROS-involved cancer therapies.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Reactive oxygen species in cancer: Current findings and future directions

Hajime Nakamura et al.

Summary: Reactive oxygen species (ROS) play a crucial role in cancer, with low to moderate levels activating cell functions and high levels causing cell death. Therapies manipulating ROS levels show promise for cancer treatment, offering new opportunities for therapeutic strategies.

CANCER SCIENCE (2021)

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Biomineralized DNA nanospheres by metal organic framework for enhanced chemodynamic therapy

Peipei Wang et al.

Summary: In this study, metal organic framework (MOF)-biomineralized DNA nanospheres were developed as chemodynamic therapy (CDT) agents with tumor-activable cascade reactions for boosting intracellular H2O2 concentration, achieving remarkable antitumor outcome. The CDT agent utilizes tumor acid-induced dissociation to release Fe2+/Fe3+ for Fenton reaction and GOx for catalyzing glucose into H2O2, synergistically elevating ROS level in tumor cells to induce ferroptosis. This strategy provides a promising approach for developing CDT agents with improved therapeutic efficacy.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Chemistry, Multidisciplinary

Organic Sonosensitizers for Sonodynamic Therapy: From Small Molecules and Nanoparticles toward Clinical Development

Dong Li et al.

Summary: Sonodynamic therapy (SDT) is a novel noninvasive therapeutic approach that combines low-intensity ultrasound with sonosensitizers. Compared to phototherapy, SDT offers advantages such as deeper tissue penetration, high accuracy, and reduced side effects. The use of organic sonosensitizers is crucial for therapeutic efficacy, and nanotechnology holds potential for overcoming obstacles and fostering innovation in this field.
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Peroxisome inspired hybrid enzyme nanogels for chemodynamic and photodynamic therapy

Xing Qin et al.

Summary: This study demonstrates a peroxisome-inspired approach for tumor therapy by incorporating lactate oxidase and catalase into nanoparticles. This method effectively inhibits tumor growth by regulating intracellular ROS levels.

NATURE COMMUNICATIONS (2021)

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Genome-wide synthetic lethal screen unveils novel CAIX-NFS1/xCT axis as a targetable vulnerability in hypoxic solid tumors

Shawn C. Chafe et al.

Summary: The study identified a redox homeostasis network involving the iron-sulfur cluster enzyme NFS1 in the survival mechanisms governed by the tumor hypoxia-induced pH regulator CAIX. Targeting CAIX while depleting NFS1 or blocking cyst(e)ine availability enhanced ferroptosis and inhibited tumor growth significantly. Altering intracellular pH and iron homeostasis through inhibiting CAIX activity may lead to the development of innovative therapeutic strategies for solid tumors to overcome hypoxia- and acidosis-mediated tumor progression and therapeutic resistance.

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Article Chemistry, Physical

Macrophage-hitchhiking supramolecular aggregates of CuS nanoparticles for enhanced tumor deposition and photothermal therapy

Junyan Li et al.

Summary: In this design, CuS nanoparticles were intracellularly self-assembled into large supramolecular aggregates via host-guest interactions, significantly inhibiting efflux during macrophage-hitchhiking delivery. This strategy enhanced deposition of CuS NPs in tumor tissue, improving photothermal therapy efficacy.

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Advances in photothermal nanomaterials for biomedical, environmental and energy applications

Si Yin Tee et al.

Summary: Materials exhibiting photothermal effect have attracted significant research interest for their ability to efficiently convert light into heat. Recent advancements in nano-enabled materials, such as plasmonic metals and semiconductors, have led to improved photothermal performance. Strategic engineering of nanostructured size, shape, composition, and bandgap is crucial for enhancing light harvesting and photothermal conversion capabilities of these materials.

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Synergistically enhanced multienzyme catalytic nanoconjugates for efficient cancer therapy

Sheng-Yan Yin et al.

Summary: The study presents a robust cascade biomimetic nanoplatform integrating chemiluminescence-induced photodynamic therapy, Fenton reaction-based chemodynamic therapy, and glucose oxidase-mediated starvation therapy to enhance cancer treatment synergistically. The nanoplatform shows excellent anti-tumor performance in both in vitro and in vivo studies, broadening the pathway to fight against cancer through effective cascade catalysis.

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Cascade catalytic nanoplatform constructed by laterally-functionalized pillar[5]arenes for antibacterial chemodynamic therapy

Fei Li et al.

Summary: Chemodynamic therapy (CDT) is a promising approach for combating bacterial infections by converting H2O2 into highly toxic OH, but developing safe and effective CDT strategies is challenging. The designed cascade catalytic nanoplatform can effectively catalyze glucose to produce H2O2, trigger Fenton reaction, and achieve antibacterial CDT, with little to no cytotoxicity towards mammalian cells.

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Iron nanoparticles augmented chemodynamic effect by alternative magnetic field for wound disinfection and healing

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