Bimetallic oxide Cu-FeO nanoclusters with multiple enzymatic activities for wound infection treatment and wound healing.

Infections and oxidative stress complicate wound healing. In recent years, nanomaterials with natural enzymatic activities have enabled the development of new antibacterial pathways. In this study, Cu-FeO nanoclusters with multienzyme properties were synthesised.

Local Release of Copper Manganese Oxide Using HA Microneedle for Improving the Efficacy of Drug-Resistant Wound Inflammation.

The production of bacterial toxins and excessive accumulation of reactive oxygen species (ROS) can induce localized oxidative stress, triggering an exaggerated immune response that impedes wound healing and culminates in chronic wounds. To address this issue, a microneedle (MN) system loaded with copper-manganese oxide (CMO) is developed to modulate the hyperimmune response in wounds. CMO@MN exhibits excellent antimicrobial and anti-inflammatory properties by effectively killing bacteria, scavenging ROS, and modulating macrophage polarization through their multiple enzymatic activities and photothermal properties.

Ternary inulin hydrogel with long-term intestinal retention for simultaneously reversing IBD and its fibrotic complication.

Excessive accumulation of reactive oxygen and nitrogen species (RONS) and dysbiosis of intestinal microbiota are pivotal symptoms for inflammatory bowel disease (IBD) and its associated complications, such as intestinal fibrosis. This research introduces a probiotic inulin hydrogel loaded with polypyrrole (PPy) nanozymes and antifibrotic drug pirfenidone (PFD) (PPy/PFD@Inulin gel) designed for the concurrent amelioration of IBD and its fibrotic complication. Upon oral administration, the inulin gel matrix could extend the gastrointestinal residence time of PPy nanozymes and PFD, facilitating the efficient reduction of pro-inflammatory cytokine levels and enhancement of the intestinal epithelial barrier repair as well as the suppression of intestinal fibrosis through sustained RONS scavenging, modulation of gut microbiota and attenuation of the TGF-β/Smad signaling pathway to inhibit fibroblast proliferation.

Biomaterials with cancer cell-specific cytotoxicity: challenges and perspectives.

Significant advances have been made in materials for biomedical applications, including tissue engineering, bioimaging, cancer treatment, In the past few decades, nanostructure-mediated therapeutic strategies have been developed to improve drug delivery, targeted therapy, and diagnosis, maximizing therapeutic effectiveness while reducing systemic toxicity and side effects by exploiting the complicated interactions between the materials and the cell and tissue microenvironments. This review briefly introduces the differences between the cells and tissues of tumour or normal cells. We summarize recent advances in tumour microenvironment-mediated therapeutic strategies using nanostructured materials.

Imaging-guided companion diagnostics in radiotherapy by monitoring APE1 activity with afterglow and MRI imaging.

Companion diagnostics using biomarkers have gained prominence in guiding radiotherapy. However, biopsy-based techniques fail to account for real-time variations in target response and tumor heterogeneity. Herein, we design an activated afterglow/MRI probe as a companion diagnostics tool for dynamically assessing biomarker apurinic/apyrimidinic endonuclease 1(APE1) during radiotherapy in vivo.

Recent advances on thermosensitive hydrogels-mediated precision therapy.

Precision therapy has become the preferred choice attributed to the optimal drug concentration in target sites, increased therapeutic efficacy, and reduced adverse effects. Over the past few years, sprayable or injectable thermosensitive hydrogels have exhibited high therapeutic potential. These can be applied as cell-growing scaffolds or drug-releasing reservoirs by simply mixing in a free-flowing sol phase at room temperature.

W-GA nanodots restore intestinal barrier functions by regulating flora disturbance and relieving excessive oxidative stress to alleviate colitis.

Inflammatory bowel disease (IBD) may arise due to disruption of mucosal barriers as a result of dysregulation of the intestinal flora and excessive oxidative stress. The creation of nanomaterials with only microbiota-regulating effects often leads to inadequate therapeutic outcomes caused by the disruption of a healthy microbial balance and the emergence of tissue harm caused by excessive oxidative stress. This report describes the multifunctional activity of ultrasmall W-GA nanodots, which can precisely regulate the intestinal microbiome by inhibiting the abnormal expansion of Enterobacteriaceae during colitis and alleviating the damage caused by oxidative stress to the reconstructive microflora, ultimately restoring intestinal barrier function.

Endoscopic Submucosal Dissection Criteria for Differentiated-type Early Gastric Cancer Are Applicable to Mixed-type Differentiated Predominant.

Background: There is a lack of sufficient evidence on whether mixed-type differentiated predominant early gastric cancer (MD-EGC) can be treated endoscopically by referring to the criteria for differentiated-type early gastric cancer (EGC). This study aims to evaluate the efficacy of endoscopic submucosal dissection (ESD) in MD-EGC.

Methods: Patients with differentiated-type EGC treated with ESD first from January 2015 to June 2021 were reviewed, including MD-EGC and pure differentiated-type EGC (PD-EGC).

Recent progress on engineered micro/nanomaterials mediated modulation of gut microbiota for treating inflammatory bowel disease.

Inflammatory bowel disease (IBD) is a type of chronic recurrent inflammation disease that mainly includes Crohn's disease and ulcerative colitis. Currently, the treatments for IBD remain highly challenging, with clinical treatment drugs showing limited efficacy and adverse side effects. Thus, developing drug candidates with comprehensive therapeutic effects, high efficiency, and low toxicity is urgently needed.

3D-printed nanohydroxyapatite/methylacrylylated silk fibroin scaffold for repairing rat skull defects.

The repair of bone defects remains a major challenge in the clinic, and treatment requires bone grafts or bone replacement materials. Existing biomaterials have many limitations and cannot meet the various needs of clinical applications. To treat bone defects, we constructed a nanohydroxyapatite (nHA)/methylacrylylated silk fibroin (MASF) composite biological scaffold using photocurable 3D printing technology.

Long-term efficacy of peroral endoscopic myotomy for achalasia under different criteria.

Background: Peroral endoscopic myotomy (POEM) has emerged as a widely accepted treatment for achalasia, with limited studies for over 2 years. Additionally, traditional measurements of achalasia after POEM have deficiencies. The study aimed to analyze the long-term outcomes of POEM under different criteria.

Rapid Cryptococcus electroporated-lysis and sensitive detection on a miniaturized platform.

Fast and accurate detection of Cryptococcus and precise differentiation of its subtypes is of great significance in protecting people from cryptococcal disease and preventing its spread in populations. However, traditional Cryptococcus identification and detection techniques still face significant challenges in achieving high analysis speed as well as high sensitivity. In this work, we report an electric microfluidic biochip.

Urchin-like FeO@BiS Nanospheres Enable the Destruction of Biofilm and Efficiently Antibacterial Activities.

Biofilm-associated infections (BAIs) have been considered a major threat to public health, which induce persistent infections and serious complications. The poor penetration of antibacterial agents in biofilm significantly limits the efficiency of combating BAIs. Magnetic urchin-like core-shell nanospheres of FeO@BiS were developed for physically destructing biofilm and inducing bacterial eradication via reactive oxygen species (ROS) generation and innate immunity regulation.

APTES-mediated Cu(OH)(NO) nanomaterials on the surface of silicone catheters for abscess.

Metal-based nanomaterials have remarkable bactericidal effects; however, their toxicity cannot be disregarded. To address this concern, we developed a simple synthesis route for antibacterial catheters using metal-based nanomaterials to reduce toxicity while harnessing their excellent bactericidal properties. The grafting agent (3-aminopropyl)triethoxysilane (APTES) forms -NH groups on the catheter surface, onto which copper ions form a nanomaterial complex known as Cu(OH)(NO) (defined as SA-Cu).

Nanoscale coordination polymer Fe-DMY downregulating Poldip2-Nox4-HO pathway and alleviating diabetic retinopathy.

Diabetic retinopathy (DR) is a prevalent microvascular complication of diabetes and the leading cause of blindness and severe visual impairment in adults. The high levels of glucose trigger multiple intracellular oxidative stress pathways, such as POLDIP2, resulting in excessive reactive oxygen species (ROS) production and increased expression of vascular cell adhesion molecule-1 (VCAM-1), hypoxia-inducible factor 1α (HIF-1α), and vascular endothelial growth factor (VEGF), causing microvascular dysfunction. Dihydromyricetin (DMY) is a natural flavonoid small molecule antioxidant.

Au Nanorods Activated the Zn/Ce Composites with Cancer Cell Specific Cytotoxicity for Enhanced Chemodynamic Therapy.

Chemodynamic therapy based on the Fenton reaction has been developed as an extremely promising modality for cancer therapeutics. In this study, a core-shell structure nanoplatform was constructed by a Au nanorod externally encapsulating Ce/Zn-based composites (ACZO). The nanoparticles can catalyze the generation of reactive oxygen species (ROS) under acidic conditions and effectively consume existing glutathione (GSH) to destroy the redox balance within the tumor.

Engineering Hyaluronic Acid Microneedles Loaded with Mn and Temozolomide for Topical Precision Therapy of Melanoma.

Topical therapy has received worldwide attention for in situ tumors owing to its higher efficacy of drug delivery. Herein, this work reports a dissolvable multifunctional hyaluronic acid microneedles (HMNs) patch coloaded with temozolomide (TMZ) and MnCl (TMZ/MnCl@HMN) for chemoimmunotherapy of melanoma. HMNs can ensure the stability of TMZ over time, and exhibit fewer side effects with a localized release way.

Topical bismuth oxide-manganese composite nanospheres alleviate atopic dermatitis-like inflammation.

Atopic dermatitis (AD) is a common skin disease involving important immune mechanisms. There is an unmet need for a treatment for this condition. Herein, we focused on elucidating the role of BiMnO nanospheres (BM) in alleviating skin inflammation in AD-like C57BL/6 mice.

2D Nanozymes Modulate Gut Microbiota and T-Cell Differentiation for Inflammatory Bowel Disease Management.

Intestinal commensal microbiota dysbiosis and immune dysfunction are significant exacerbating factors in inflammatory bowel disease (IBD). To address these problems, Pluronic F-127-coated tungsten diselenide (WSe @F127) nanozymes are developed by simple liquid-phase exfoliation. The abundant valence transitions of elemental selenium (Se /Se ) and tungsten (W /W ) enable the obtained WSe @F127 nanozymes to eliminate reactive oxygen/nitrogen species.

Recent advances on emerging nanomaterials for diagnosis and treatment of inflammatory bowel disease.

Inflammatory bowel disease (IBD) is a chronic idiopathic inflammatory disorder that affects the entire gastrointestinal tract and is associated with an increased risk of colorectal cancer. Mainstream clinical testing methods are time-consuming, painful for patients, and insufficiently sensitive to detect early symptoms. Currently, there is no definitive cure for IBD, and frequent doses of medications with potentially severe side effects may affect patient response.

Multifunctional Au@AgBiS Nanoparticles as High-Efficiency Radiosensitizers to Induce Pyroptosis for Cancer Radioimmunotherapy.

Radiotherapy (RT), a widely used clinical treatment modality for cancer, uses high-energy irradiation for reactive oxygen species (ROS) production and DNA damage. However, its therapeutic effect is primarily limited owing to insufficient DNA damage to tumors and harmful effects on normal tissues. Herein, a core-shell structure of metal-semiconductors (Au@AgBiS nanoparticles) that can function as pyroptosis inducers to both kill cancer cells directly and trigger a robust anti-tumor immune against 4T1 triple-negative murine breast cancer and metastasis is rationally designed.

Cancer cell membrane-coated upconversion nanoparticles/ZnMnS core-shell nanoparticles for targeted photodynamic and chemodynamic therapy of pancreatic cancer.

Oxidative stress induced by reactive oxygen species (ROS) is promising treatment approach for pancreatic ductal adenocarcinoma (PDAC), which is typically insensitive to conventional chemotherapy. In this study, BxPC-3 pancreatic cancer cell membrane-coated upconversion nanoparticles/ZnMnS core-shell nanoparticles (abbreviated as BUC@ZMS) were developed for tumor-targeted cancer therapy synergistically oxidative stress and overcoming glutathione (GSH) overexpression. Using a combination of photodynamic therapy (PDT) and chemodynamic therapy (CDT), the BUC@ZMS core-shell nanoparticles were able to elicit the death of pancreatic cancer cells through the high production of ROS.