Smart responsive hydrogel systems applied in bone tissue engineering.

The repair of irregular bone tissue suffers severe clinical problems due to the scarcity of an appropriate therapeutic carrier that can match dynamic and complex bone damage. Fortunately, stimuli-responsive hydrogel systems that are triggered by a special microenvironment could be an ideal method of regenerating bone tissue because of the injectability, gelatin, and spatiotemporally tunable drug release. Herein, we introduce the two main stimulus-response approaches, exogenous and endogenous, to forming hydrogels in bone tissue engineering.

A study on the impact of systematic desensitization training on competitive anxiety among Latin dance athletes.

Objective: In the domain of competitive events, Latin dance athletes have always suffered competitive anxiety, which is a prevalent and prevailing psychological facet, in pre-, intra-, and post-competitive engagements. Usually, the implementation of systematic desensitization training is an efficacious approach to reduce competitive anxiety levels in routine sports to fortify psychological resilience of athletes (like swimming, volleyball, and basketball). This study focuses on the effect of systematic desensitization training on competition anxiety in the training of Latin dancers to establish good mental ability and promote the competitive ability of athletes.

Allosteric Activator-Regulated CRISPR/Cas12a System Enables Biosensing and Imaging of Intracellular Endogenous and Exogenous Targets.

Sensors designed based on the -cleavage activity of CRISPR/Cas12a systems have opened up a new era in the field of biosensing. The current design of CRISPR/Cas12-based sensors in the "on-off-on" mode mainly focuses on programming the activator strand (AS) to indirectly switch the -cleavage activity of Cas12a in response to target information. However, this design usually requires the help of additional auxiliary probes to keep the activator strand in an initially "blocked" state.

Photoactivatable CRISPR/Cas12a Sensors for Biomarkers Imaging and Point-of-Care Diagnostics.

In recent years, the CRISPR/Cas12a-based sensing strategy has shown significant potential for specific target detection due to its rapid and sensitive characteristics. However, the "always active" biosensors are often insufficient to manipulate nucleic acid sensing with high spatiotemporal control. It remains crucial to develop nucleic acid sensing devices that can be activated at the desired time and space by a remotely applied stimulus.

Ultrasound-triggered gelation with ROS-controlled drug release for cartilage repair.

Cartilage defects are usually caused by acute trauma and chronic degeneration. However, it is still a great challenge to improve the repair of articular cartilage defects due to the limited self-regeneration capacity of such defects. Herein, a novel ROS-responsive nanocomposite hydrogel loaded with kartogenin (KGN) and bone marrow-derived stem cells (BMSCs) was designed and constructed the enzymatic reaction of fibrinogen and thrombin.

Second near-infrared photoactivatable nanomedicines for enhanced photothermal-chemodynamic therapy of cancer.

Nanomedicines have been widely used for cancer therapy, while controlling their activity for effective and safe treatment remains a big challenge. Herein, we report the development of a second near-infrared (NIR-II) photoactivatable enzyme-loaded nanomedicine for enhanced cancer therapy. Such a hybrid nanomedicine contains a thermoresponsive liposome shell loaded with copper sulfide nanoparticles (CuS NPs) and glucose oxidase (GOx).

Bone/cartilage targeted hydrogel: Strategies and applications.

The skeletal system is responsible for weight-bearing, organ protection, and movement. Bone diseases caused by trauma, infection, and aging can seriously affect a patient's quality of life. Bone targeted biomaterials are suitable for the treatment of bone diseases.

Silk fibroin-based biomaterials for cartilage/osteochondral repair.

Osteoarthritis (OA) is a common joint disease with a high disability rate. In addition, OA not only causes great physiological and psychological harm to patients, but also puts great pressure on the social healthcare system. Pathologically, the disintegration of cartilage and the lesions of subchondral bone are related to OA.

Tumor redox microenvironment modulating composite hydrogels for enhanced sonodynamic therapy of colorectal cancer.

Effective treatment of colorectal cancer is important to improve the quality of life for patients, which however remains a great challenge in the clinic. Herein, we report the construction of a composite hydrogel that can modulate the tumor redox microenvironment for enhanced sonodynamic therapy (SDT) of colorectal cancer. Such composite hydrogels consist of sonosensitizer protoporphyrin IX (PpIX)-conjugated manganese oxide (MnO) nanoparticles and a glutathione (GSH) inhibitor after Ca induced gelation in the tumor site.

Decreased Expression in Clear Cell Renal Cell Carcinoma Predicts Worse Overall Survival.

Clear cell renal cell carcinoma (ccRCC) is the most frequent and lethal type of kidney cancer. Although differential expression of cyclin-dependent kinase-like 2 () has been reported to be associated with tumor progression in other cancers, its prognostic value, and potential mechanism in patients with ccRCC still remain unknown. Gene expression analysis was conducted using The Cancer Genome Atlas (TCGA), Gene Expression Omnibus, and International Cancer Genome Consortium databases.

Computational Study on Surface Bonding Based on Nanocone Arrays.

Surface bonding is an essential step in device manufacturing and assembly, providing mechanical support, heat transfer, and electrical integration. Molecular dynamics simulations of surface bonding and debonding failure of copper nanocones are conducted to investigate the underlying adhesive mechanism of nanocones and the effects of separation distance, contact length, temperature, and size of the cones. It is found that van der Waals interactions and surface atom diffusion simultaneously contribute to bonding strength, and different adhesive mechanisms play a main role in different regimes.

[Relationship between germ cells apoptosis and alterations of total antioxidant capacity, nitric oxide level and nitric oxide synthase activity in testes of rats submitted to alcohol drinking].

Objective: To investigate the relationship between germ cells apoptosis and alterations of total antioxidant capacity (T-AOC), nitric oxide(NO) level and nitric oxide synthase (NOS) activity in the testes of rats submitted to alcohol drinking.

Methods: Twenty healthy male Sprague-Dawley rats (3 months old) were randomly divided into two groups: control group and experimental group. 50% alcohol and distilled water were administered intragastrically at a dose of 10 ml/kg body weight to two groups of rats respectively.