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In view of the increased levels of reactive oxygen species (ROS) that disturb the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs), the repair of diabetic bone defects remains a great challenge. Herein, a factor‐free hydrogel is reported with ROS scavenging and responsive degradation properties for enhanced diabetic bone healing. These hydrogels contain ROS‐cleavable thioketal...
The aggregation‐caused quenching has always limited the high concentration and solid‐state applications of carbon nanodots. While the aggregation‐induced emission effect, dominated by intramolecular motion, may be an effective means to solve this problem. Here, hydrophobic solid‐state red‐light carbon nanodots (M‐CDs) with 95% yield are synthesized by a one‐step hydrothermal method using 2,2'‐dithiodibenzoic...
The growing urgence of information protection promotes continuously the development of information‐encryption technique. To date, hydrogels have become an emerging candidate for advanced information‐encryption materials, because of their unique stimulus responsiveness. However, current methods to design multi‐level information‐encrypted hydrogels usually need sophisticated chemistry or experimental...
Precise timing of macrophage polarization plays a pivotal role in immunomodulation of tissue regeneration, yet most studies mainly focus on M2 macrophages for their anti‐inflammatory and regenerative effects while the essential proinflammatory role of the M1 phenotype on the early inflammation stage is largely underestimated. Herein, a superparamagnetic hydrogel capable of timely controlling macrophage...
T cell exhaustion caused by mitochondrial dysfunction is the major obstacle of T cells‐based cancer immunotherapy. Besides exhausted T cells, the insufficient major histocompatibility complex class I (MHC I) on tumor cells leads to inefficient T cell recognition of tumor cells, compromising therapeutic efficacy. Therapeutic platform to regulate T cell exhaustion and MHC I expression for boosting T...
Nature creates fascinating self‐organized spatiotemporal patterns through the delicate control of reaction‐diffusion dynamics. As the primary unit of cortical bone, osteon has concentric lamellar architecture, which plays a crucial role in the mechanical and physiological functions of bone. However, it remains a great challenge to fabricate the osteon‐like structure in a natural self‐organization...
Inspired by the unique structure and lubrication mechanism of ball bearing, monodisperse, size‐uniform hydrogel spheres are fabricated by Hongyu Zhang, Xiangyang Xu, Wenguo Cui, and co‐workers in article number 2004519 using microfluidic technology, and subsequently modified with pSBMA to form superlubricated hydrogel microspheres using a one‐step bionic grafting approach. The superlubricated hydrogel...
Osteoarthritis, a lubrication dysfunction related disorder in joint, is characterized by articular cartilage degradation and joint capsule inflammation. Enhancing joint lubrication, combined with anti‐inflammatory therapy, is considered as an effective strategy for osteoarthritis treatment. Herein, based on the ball‐bearing‐inspired superlubricity and the mussel‐inspired adhesion, a superlubricated...
Hydrogels with the ability to change shape in response to biochemical stimuli are important for biosensing, smart medicine, drug delivery, and soft robotics. Here, a family of multicomponent DNA polymerization motor gels with different polymer backbones is created, including acrylamide‐co‐bis‐acrylamide (Am‐BIS), poly(ethylene glycol) diacrylate (PEGDA), and gelatin‐methacryloyl (GelMA) that swell...
Based on biocompatible and stretchable hydrogels, Fei Li, Feng Xu, and co‐workers propose a simple paradigm to prototype stretchable electronics with an embedded 3D helical conductive layout in article number 1801711. The 3D layout promises enhanced stretchability and robustness compared to traditional 1D and 2D designs. The hydrogel electronics can be directly incorporated onto the human body and...
The ever‐growing overlap between stretchable electronic devices and wearable healthcare applications is igniting the discovery of novel biocompatible and skin‐like materials for human‐friendly stretchable electronics fabrication. Amongst all potential candidates, hydrogels with excellent biocompatibility and mechanical features close to human tissues are constituting a promising troop for realizing...
Geometric and mechanical characterizations of hydrogel materials at the microscale are attracting increasing attention due to their importance in tissue engineering, regenerative medicine, and drug delivery applications. Contemporary approaches for measuring the these properties of hydrogel microbeads suffer from low‐throughput, complex system configuration, and measurement inaccuracy. In this work,...
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