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Published on: October 9, 2012
Ultrasmall Black Phosphorus Quantum Dots with Robust Antioxidative Properties for Acute Kidney and Liver Injury
Jingyang Zhang1,2, Shuyan Han3, Zixuan Zhao4
1Department of Nephrology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510180, China.
Abstract:
Acute organ injuries, such as acute kidney injury (AKI) and acute liver injury (ALI), usually present high morbidity and mortality in patients. However, the current clinical treatments remain limited, especially the lack of effective drug-based treatment. Since these acute injuries are often associated with reactive oxygen species (ROS) overproduction, it is a promising strategy to develop therapeutic agents with potent ROS scavenging ability and excellent biocompatibility for efficient antioxidation therapy. Black phosphorus quantum dots (BPQDs), low-dimensional nanomaterials prepared through a straightforward one-step method and capable of complete controllable biodegradation, offer significant potential. This study comprehensively explores the extensive free-radical scavenging capabilities of BPQDs, underscoring their immense potential in treating ROS-related organ injuries. BPQDs could simultaneously achieve radical scavenging of DPPH, ABTS·, OH·, and O2 -· and exhibit excellent cytoprotective effects against ROS-mediated damage even at extremely low dosages. Besides, the ultrasmall size of BPQDs (≈3-5 nm) allows them to effectively penetrate the glomerular filtration barrier (≈6 nm), significantly improving the symptoms of AKI and ALI in vivo. The therapeutic efficacy and great biocompatibility of BPQDs facilitate the clinical management of ROS-related diseases, which will broaden the applications of QDs in the field of biomedicine.
Insights
Black phosphorus quantum dots (BPQDs) show potent free-radical scavenging abilities and biocompatibility. These nanomaterials effectively treat acute kidney injury (AKI) and acute liver injury (ALI) by reducing oxidative stress.
Area of Science:
- Nanomaterials Science
- Biomedical Engineering
- Toxicology
Background:
- Acute kidney injury (AKI) and acute liver injury (ALI) are critical conditions with limited therapeutic options.
- Reactive oxygen species (ROS) overproduction is a key factor in the pathogenesis of these organ injuries.
- Developing effective antioxidant therapies with good biocompatibility is crucial for managing ROS-related diseases.
Purpose of the Study:
- To investigate the free-radical scavenging capabilities of black phosphorus quantum dots (BPQDs).
- To evaluate the potential of BPQDs as a therapeutic agent for ROS-related organ injuries, specifically AKI and ALI.
- To assess the biocompatibility and in vivo efficacy of BPQDs in treating these conditions.
Main Methods:
- Synthesis of black phosphorus quantum dots (BPQDs) via a one-step method.
- Assessment of BPQDs' free-radical scavenging activity against DPPH, ABTS·, OH·, and O2 -· radicals.
- Evaluation of BPQDs' cytoprotective effects against ROS-mediated cellular damage.
- In vivo studies to assess the therapeutic efficacy of BPQDs in AKI and ALI models, considering their penetration of the glomerular filtration barrier.
Main Results:
- BPQDs demonstrated broad free-radical scavenging capabilities, including DPPH, ABTS·, OH·, and O2 -·.
- BPQDs exhibited significant cytoprotective effects against ROS-induced damage, even at low concentrations.
- The ultrasmall size (≈3-5 nm) of BPQDs facilitated glomerular filtration barrier penetration (≈6 nm).
- In vivo administration of BPQDs significantly improved symptoms in AKI and ALI models.
Conclusions:
- BPQDs possess potent antioxidant properties and excellent biocompatibility, making them promising therapeutic candidates.
- Their ability to scavenge various free radicals and protect cells from oxidative damage is significant.
- BPQDs show therapeutic potential for clinical management of ROS-related organ injuries like AKI and ALI, expanding QD applications in biomedicine.
