Engineered nanozymes have been developed to catalyze the production of reactive oxygen species (ROS) for cancer therapy, but currently, the ROS generation efficiency is still far from optimistic. In this study, a human self‐driven electrical stimulation enhanced catalytic system based on wearable triboelectric nanogenerator (TENG) and fully π‐conjugated covalent organic framework nanocages (hCOF) for improving cancer therapy is created. The fully π‐conjugated hCOF nanocage with high electron mobility under the self‐generated electric field can not only rearrange the local electric field for optimizing energy utilization, but also facilitates the access of electrolytes to optimize the utilization of the electric field. With the self‐powered wearable TENG, the peroxidase‐like activity of hCOF increased by 2.44‐fold and has electricity‐responsive doxorubicin delivery capacity for enhancing the therapeutic outcomes. The high‐efficient self‐driven electrical stimulation enhanced nanocatalytic system provides a new optimized model for the catalytic energy supply of nanozymes.
The production of reactive oxygen species (ROS) to elicit lethal cellular oxidative damage is an attractive pathway to kill cancer, but it is still hindered by the low ROS production...
Covalent organic frameworks (COFs) as a type of porous and crystalline covalent organic polymer are built up from covalently linked and periodically arranged organic molecules. Their precise assembly, well-defined coordination network, and tunable porosity endow COFs with diverse characteristics such as low density, high crystallinity, porous structure, and large specific-surface area, as well as versatile functions and active sites that can be tuned at molecular and atomic level. These unique properties make them excellent candidate materials for biomedical applications, such as drug delivery, diagnostic imaging, and disease therapy. To realize these functions, the components, dimensions, and guest molecule loading into COFs have a great influence on their performance in various applications. In this review, we first introduce the influence of dimensions, building blocks, and synthetic conditions on the chemical stability, pore structure, and chemical interaction with guest molecules of COFs. Next, the applications of COFs in cancer diagnosis and therapy are summarized. Finally, some challenges for COFs in cancer therapy are noted and the problems to be solved in the future are proposed.
Gas therapy is an emerging technology for improving cancer therapy with high efficiency and low side effects. However, due to the existence of the gatekeeper of the blood–brain barrier (BBB) and the limited availability of current drug delivery systems, there still have been no reports on gas therapy for intracranial neuroglioma. Herein, an integrated, self‐powered, and wirelessly controlled gas‐therapy system is reported, which is composed of a self‐powered triboelectric nanogenerator (TENG) and an implantable nitric oxide (NO) releasing device for intracranial neuroglioma therapy. In the system, the patient self‐driven TENG converts the mechanical energy of body movements into electricity as a sustainable and self‐controlled power source. When delivering energy to light a light‐emitting diode in the implantable NO releasing device via wireless control, the encapsulated NO donor s‐nitrosoglutathione (GSNO) can generate NO gas to locally kill the glioma cells. The efficacy of the proof‐of‐concept system in subcutaneous 4T1 breast cancer model in mice and intracranial glioblastoma multiforme in rats is verified. This self‐powered gas‐therapy system has great potential to be an effective adjuvant treatment modality to inhibit tumor growth, relapse, and invasion via teletherapy.
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