Enantioselective Trifluoromethylazidation of Styrenyl Olefins Catalyzed by an Engineered Nonheme Iron Enzyme.

Organofluorines, particularly those containing trifluoromethyl (CF3) groups, play a critical role in medicinal chemistry. While trifluoromethylation of alkenes provides a powerful synthetic route to construct CF3-containing compounds with broad structural and functional diversity, achieving enantioselective control in these reactions remains a formidable challenge. In this study, we engineered a nonheme iron enzyme, quercetin 2,3-dioxygenase from Bacillus subtilis (BsQueD), for the enantioselective trifluoromethylazidation of alkenes.

Activation of ClO by Nanoscale Zero-Valent Iron for Efficient Soil Polycyclic Aromatic Hydrocarbon Degradation: New Insight into the Relative Contribution of Fe(IV) and Hydroxyl Radicals.

Recently, the activation of chlorine dioxide (ClO) by metal(oxide) for soil remediation has gained notable attention. However, the related activation mechanisms are still not clear. Herein, the variation of iron species and ClO, the generated reactive oxygen species, and the toxicity of the degradation intermediates were explored and evaluated with nanoscale zero-valent iron (nFe) being employed to activate ClO for soil polycyclic aromatic hydrocarbon (PAH) removal.

A Low-Cost Electrochemical Cell Sensor Based on MWCNT-COOH/α-FeO for Toxicity Detection of Drinking Water Disinfection Byproducts.

The disinfection of drinking water is essential for eliminating pathogens and preventing waterborne diseases. However, this process generates various disinfection byproducts (DBPs), which toxicological research indicates can have detrimental effects on living organisms. Moreover, the safety of these DBPs has not been sufficiently assessed, underscoring the need for a comprehensive evaluation of their toxic effects and associated health risks.

Biocomposite Polyvinyl Alcohol/Ferritin Hydrogels with Enhanced Stretchability and Conductivity for Flexible Strain Sensors.

Protein-based hydrogels with stretchability and conductivity have potential applications in wearable electronic devices. However, the development of protein-based biocomposite hydrogels is still limited. In this work, we used natural ferritin to develop a PVA/ferritin biocomposite hydrogel by a repetitive freeze-thaw method.

Iron/phosphorus co-doped carbon nanozyme for colorimetric sensing of organophosphorus pesticides in food.

In this work, a peroxidase-like (POD-like) nanozyme of Fe/P-NC was synthesized by doping phosphorus (P) and nitrogen (N) to manipulate iron (Fe) activity centers, which showed catalytic activity and kinetics comparable to those of natural HRP. Based on the efficient POD-like activity of the Fe/P-NC nanozyme and cascaded catalytic reactions with acetylcholinesterase (AChE), we constructed a colorimetric, affordable and sensitive sensing platform to detect organophosphorus pesticides (OPs). In the presence of AChE, the POD-like activity of the prepared Fe/P-NC was suppressed, which weakened the Fe/P-NC-catalyzed oxidation of TMB.

Antarctic Krill Protein Amyloid Fibrils as a Novel Iron Carrier for the Improvement of Iron Deficiency.

Iron fortification with food supplements remains the primary dietary strategy for improving iron deficiency anemia (IDA). This study used Antarctic krill protein for fibrillar design to form an Antarctic krill protein amyloid fibril (AKAF). The results indicated that peptides generated by proteolysis were a prerequisite for fibril assembly, forming elongated fibril structures and cross-linking upon heating.

The role of ferroptosis in colorectal cancer and its potential synergy with immunotherapy.

Colorectal cancer (CRC) is one of the most prevalent and deadly malignancies worldwide. Recently, ferroptosis, a novel form of regulated cell death characterized by iron dependency and lipid peroxidation, has garnered significant attention from researchers. The mechanisms underlying ferroptosis, including intracellular iron levels, lipid peroxidation, and antioxidant system regulation, offer new insights into cancer treatment strategies.

The role of the C5a-C5aR pathway in iron metabolism and gastric cancer progression.

Gastric cancer continues to be a leading global health concern, with current therapeutic approaches requiring significant improvement. While the disruption of iron metabolism in the advancement of gastric cancer has been well-documented, the underlying regulatory mechanisms remain largely unexplored. Additionally, the complement C5a-C5aR pathway has been identified as a crucial factor in gastric cancer development.

Copper in the colorectal cancer microenvironment: pioneering a new era of cuproptosis-based therapy.

Copper, an essential trace element and biochemical cofactor in humans plays a critical role in maintaining health. Recent studies have identified a significant association between copper levels and the progression and metastasis of cancer. Copper is primarily absorbed in the intestinal tract, often leading to an imbalance of copper ions in the body.

The Fem cell-surface signaling system is regulated by ExsA in and affects pathogenicity.

Bacterial interspecies interactions shape microbial communities and influence the progression of polymicrobial infections. FemI-FemR-FemA, a cell-surface signaling system, in , is involved in the uptake of iron-chelating mycobactin produced by spp. In this report, we present the data that indicates the -PA1909 operon is positively regulated by ExsA, a master regulator for the type three secretion system (T3SS), connecting the Fem system with T3SS.

Epigenetic regulation of targeted ferroptosis: A new strategy for drug development.

Ferroptosis is a newly discovered form of cell death that is influenced by iron levels and is triggered by cellular metabolism and excessive lipid peroxidation. Epigenetic regulation plays a crucial role in the development and progression of diseases, making it essential to understand these mechanisms in order to identify potential targets for drug development and clinical treatment. The intersection of ferroptosis and epigenetics has opened up new avenues for research in drug development, offering innovative strategies for combating diseases.

Selective extraction process of scandium from nickel laterite waste through hydrometallurgy.

Scandium (Sc) extraction from iron and aluminum waste is a promising technique for the recycling and valorization of laterite nickel ore waste. Iron and aluminum waste is one source of scandium during preparation of nickel and cobalt hydroxide by wet smelting of laterite nickel ore. The content of Sc is notably higher than that of the raw materials, as the element is enriched in the iron and aluminum waste.

Sulfone-Embedded NIR Fluorophore with Large Stokes Shift for Monitoring Viscosity Changes during NAFLD-Induced Ferroptosis.

The accumulation of lipids in hepatocytes in nonalcoholic fatty liver disease (NAFLD) leads to an increase in reactive oxygen species and changes in the intracellular microenvironment, while ferroptosis is the result of the accumulation of iron-dependent lipid peroxidation. Studies have shown that ferroptosis plays an important role in the pathogenesis of NAFLD. Herein, we have developed a viscosity-sensitive fluorescence probe PTSO with near-infrared emission and a large Stokes shift, which were achieved by introducing the sulfone group into the dioxothiochromen-malononitrile fluorophore as an electron-withdrawing group.

Highly sensitive smart chitosan/zein film cross-linked with Fe chelated red radish anthocyanins nanoparticles for mushroom freshness monitoring.

Fe-loaded red radish anthocyanin (RRA) and zein composite nanoparticles (FZNPs) were firstly prepared to enhance the color and stability of RRA. The addition of Fe caused anthocyanin to form color chelates, enhancing its pH color sensitivity. The prepared FZNPs showed good stability and anthocyanin retention during long-term storage.

A NIR fluorescent probe based on carbamoyl oxime with high specificity for detecting ferrous ions in food and in vivo.

Ferrous ions (Fe), the primary form of iron in cells, play a crucial role in various biological processes. The presence and absorption of Fe in food has an important impact on human health. Proper dietary intake and iron supplementation are conducive to prevent and treat iron-related diseases.

TERT de novo mutation-associated dyskeratosis congenita and porto-sinusoidal vascular disease: a case report.

Background: Dyskeratosis congenita is a rare genetic disease due to telomere biology disorder and characterized by heterogeneous clinical manifestations and severe complications. "Porto-sinusoidal vascular disease" has been recently proposed, according to new diagnostic criteria, to replace the term "idiopathic non-cirrhotic portal hypertension." TERT plays an important role in telomeric DNA repair and replication.

Activation of osteoblast ferroptosis by risperidone accelerates bone loss in mice models of schizophrenia.

Background: Ferroptosis is an iron-dependent regulatory cell death, which plays an essential role in bone loss. This study investigated whether the mechanism of risperidone (RIS)-induced bone loss is related to ferroptosis.

Methods: The schizophrenia mice were induced by administering MK-801.

FPR1 affects acute rejection in kidney transplantation by regulating iron metabolism in neutrophils.

Background: Acute rejection (AR) is one of the significant factors contributing to poor prognosis in patients following kidney transplantation. Neutrophils are the main cause of early host-induced tissue injury. This paper intends to investigate the possible mechanisms of neutrophil involvement in acute rejection in renal transplantation.

Catechin-Based Polyphenol Nanoparticles Ameliorated Ferroptosis to Alleviate Brain Injury after Intracerebral Hemorrhage.

Spontaneous intracerebral hemorrhagic stroke (ICH) is a highly aggressive disease, with a high incidence and mortality rate. Iron deposition following ICH leads to oxidative damage and motor dysfunction, significantly impacting the overall quality of life for those affected. Here, a polyphenolic nanomedicine, catechin-based polyphenol nanoparticles surface-modified by thiol-terminated poly(ethylene glycol) (CNPs@PEG), was developed through the oxidative polymerization and self-assembly of catechin, a natural compound in tea.

The mechanism of activity-controlled release of 2,2',4,4'-tetrabromodiphenyl degradation by polystyrene microcapsulated nanoscale zero-valent iron.

Nano zero-valent iron (nZVI) is widely used for polychlorinated biphenyl (PBDE) remediation due to its cost-effectiveness and strong reduction capacity. However, its practical application is limited by poor stability, mobility, and antioxidant performance, as well as high reactivity that leads to side reactions and activity loss. To overcome these challenges, a poly(styrene)-encapsulated nZVI (PS-nZVI) core-shell structure was developed using dispersion polymerization.

New insights into the Fe(III)-activated peroxyacetic acid: oxidation properties and mechanism.

Iron-activated peroxyacetic acid (PAA) represents an innovative advanced oxidation process (AOP). However, the efficiency of PAA activation by Fe(III) is often underestimated due to the widespread assumption that Fe(III) exhibits much lower ability than Fe(II) to activate PAA. Herein, the oxidative degradation of Rhodamine B (RhB) by Fe(III)-activated PAA process was investigated, and some new insights into the performance and mechanism of the Fe(III)/PAA system were presented.

Identify and analyze ferroptosis-related molecular modules and immune signatures in epilepsy using microarray-based transcriptome profiling and single-cell sequencing.

Currently, the pathogenesis of epilepsy remains poorly understood. Although there is evidence indicating that iron death might play a significant role, its molecular immunological mechanisms are largely unknown. This study was designed to analyze and explore the molecular mechanisms and immunological characteristics of iron death-related genes in epilepsy.

Simultaneous removal of nitrate, carbamazepine, and copper by fulvic acid and ferric chloride composite modified ceramsite assembled fixed biofilter reactor: Performance and microbial community response.

The complex pollution and nutrient-poor characteristics of surface waters result in the limited ability of conventional reactors to remove pollutants. In this study, a novel modified ceramsite material, modified with trivalent iron (Fe(III)) and fulvic acid (FA) to form ceramsite@Fe(III)@FA (HC), was used for the first time as a biocarrier to immobilize strain Cupriavidus sp. W12, constructing a biofilter to enhance nitrate (NO-N) removal in micro-polluted water.

Ball milling of mackinawite and oxalic acid to fabricate an efficient and stable reductive material for remediation of Cr(Ⅵ)-contaminated soil.

Compared with zero-valent iron, iron sulfide has more diverse reactive species and higher reductivity, but it is still prone to be gradually deactivated due to various passivation factors. In this study, a novel reductive material (BMMW@OA) was prepared by ball milling of mackinawite (MW) as raw material and oxalic acid (OA) as modifier, so as to simultaneously improve its reductivity and stability by continuous releasing reductive species and maintaining freshness of the material surface. The BMMW@OA (w/w of MW/OA = 4/1) effectively removed Cr(Ⅵ) from water with wide pH adaptability.

Novel enhancement strategy for Hg adsorption in wastewater: Nonthermal plasma-mediated advanced modification of zero-valent iron-carbon galvanic cells with thiol functionalization.

Mercury (Hg) pollution poses a critical threat to human health and the environment, necessitating urgent control measures. This study introduces a novel modification method for the common zero-valent iron-carbon (ZVI-AC) galvanic cells using a two-step process, nonthermal (NTP) irradiation followed by targeted functionalization, aiming to enhance Hg adsorption potential by adjusting the physicochemical properties of the cells. The NTP irradiated functionalized adsorbent demonstrated superior Hg adsorption performance across various concentrations and pH variations.