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1.
J Environ Sci (China) ; 150: 657-675, 2025 Apr.
Article in English | MEDLINE | ID: mdl-39306437

ABSTRACT

The uncontrolled release of antibiotics into the environment would be extremely harmful to human health and ecosystems. Therefore, it is in urgent need to monitor the environment and promote the detection and degradation of antibiotics to the relatively harmless by-products to a feasible extent. Graphitic carbon nitride (g-C3N4) is a non-metallic n-type semiconductor that can be used for the antibiotic detection and degradation due to its easy synthesis process, excellent chemical stability and unique optical properties. Unfortunately, the utilization of visible light, electron-hole recombination and electron conductivity have hindered its potential applications in the fields of photocatalytic degradation and electrochemical detection. Although previous publications have highlighted the diverse modification methods for the g-C3N4-based materials, the underlying structure-performance relationships of g-C3N4, especially for the detection and degradation of antibiotics, remains to be further explored. In view of this, the current review centered on the recent progress in the modification techniques of g-C3N4, the detection and degradation of antibiotics using the g-C3N4-based materials, as well as the potential antibiotic degradation mechanisms of the g-C3N4-based materials. Additionally, the underlying applications of the g-C3N4-based materials for antibiotic detection and degradation were also prospected. This review would provide a valuable research foundation and the up-to-date information for the g-C3N4-based materials to combat antibiotic pollution in the environment.


Subject(s)
Anti-Bacterial Agents , Graphite , Nitrogen Compounds , Graphite/chemistry , Anti-Bacterial Agents/analysis , Anti-Bacterial Agents/chemistry , Nitrogen Compounds/chemistry , Nitrogen Compounds/analysis , Environmental Monitoring/methods , Nitriles/chemistry , Nitriles/analysis
2.
Carcinogenesis ; 2024 Oct 05.
Article in English | MEDLINE | ID: mdl-39367810

ABSTRACT

Using LC-MS/MS analysis we previously showed for the first time (Carcinogenesis 43:746-753, 2022) that levels of DNA damage-induced by benzo[a]pyrene (B[a]P), an oral carcinogen and tobacco smoke (TS) constituent, were significantly higher in buccal cells of smokers than those in non-smokers; these results suggest the potential contribution of B[a]P in the development of oral squamous cell carcinoma (OSCC) in humans. Treating cancers, including OSCC at late stages even with improved targeted therapies, continues to be a major challenge. Thus interception/prevention remains a preferable approach for OSCC management and control. In previous preclinical studies we and others demonstrated the protective effects of black raspberry (BRB) against carcinogen-induced DNA damage and OSCC. Thus, to translate preclinical findings we tested the hypothesis, in a Phase 0 clinical study, that BRB administration reduces DNA damage induced by B[a]P in buccal cells of smokers. After enrolling 27 smokers, baseline buccal cells were collected before the administration of BRB lozenges (5/day for 8 weeks, 1 gm BRB powder/lozenge) at baseline, at the middle and the end of BRB administration. The last samples were collected at four weeks after BRB cessation (washout period). B[a]P-induced DNA damage (BPDE-N2-dG) was evaluated by LC-MS/MS. BRB administration resulted in a significant reduction in DNA damage: 26.3% at the midpoint (p = 0.01506) compared to baseline, 36.1% at the end of BRB administration (p = 0.00355), and 16.6% after BRB cessation (p = 0.007586). Our results suggest the potential benefits of BRB as a chemopreventive agent against the development of TS-initiated OSCC.

3.
Phytomedicine ; 135: 156102, 2024 Sep 27.
Article in English | MEDLINE | ID: mdl-39368342

ABSTRACT

BACKGROUND: YY1 plays a crucial part in the onset and progression of numerous liver diseases, yet the significant contribution of YY1 to drug-induced liver injury (DILI) appears to have been underestimated by researchers. PURPOSE: To reveal the underlying role of YY1 in DILI. METHOD: The compounds that interact with YY1 were queried in the Comparative Toxicogenomics Database (CTD), with the majority found to be hepatotoxic, which includes certain widely used drugs. Molecular docking and SPR characterized the robust binding of hepatotoxic compounds to YY1. The duty of YY1 in DILI was investigated in Diosbulbin B (DIOB), a recently identified hepatotoxic compound that tightly associates with YY1, and further validated on ANIT, LCA, APAP, and CDDP. Transcriptomic analysis disclosed the underlying mechanisms involved in DIOB-induced liver injury. RT-qPCR, immunohistochemistry, immunofluorescence, western blotting, and cellular transfection techniques were employed to validate the specific mechanism. RESULTS: Among the 94 compounds affecting YY1 expression in the CTD, 59 compounds exhibited hepatotoxicity, showing close interactions with YY1 and almost consistent binding sites by molecular docking. The SPR validated the tough binding of several hepatotoxic compounds to YY1, including five FDA-approved hepatotoxic drugs. Mechanistically, the involvement of YY1 in DILI was uncovered through the cholestasis lens, mice hepatic YY1 was up-regulated by hepatotoxic DIOB and transcriptionally inhibited FXR and its downstream BSEP and MRP2 expression, initiating early in cholestatic liver injury and persisting to drive the progression of cholestasis. ANIT and LCA-induced model of cholestasis provided evidence for the hypothesis that YY1 frequently mediates drug induced cholestasis (DIC). APAP and CDDP indicated that YY1 may also be involved in hepatocellular and mixed type DILI. CONCLUSION: YY1 widely mediated the development of DIC and also might be engaged in other types of DILI. YY1 presented a common target for hepatotoxic medications and the targeting of liver YY1 for drug development may offer a novel approach for managing DILI.

4.
Expert Opin Drug Saf ; : 1-12, 2024 Oct 07.
Article in English | MEDLINE | ID: mdl-39365557

ABSTRACT

OBJECTIVE: The study aims to thoroughly assess the adverse events related to infections and infestations associated with biological agents used for psoriasis using the U.S. Food and Drug Administration's Adverse Event Reporting System (FAERS) database. METHODS: We analyzed FAERS data from the first quarter of 2004 to the fourth quarter of 2023. The study included TNF-α inhibitors (etanercept, infliximab, adalimumab), IL-12/23 inhibitors (ustekinumab), IL-23p19 inhibitors (guselkumab), and IL-17 inhibitors (secukinumab, ixekizumab). We used disproportionality analysis and Bayesian methods to quantify the related adverse event (AE) signals. RESULTS: Most AEs related to infections and infestations are already listed on the drug packaging labels. Notably, TNF-α inhibitors are associated with a significantly higher incidence of tuberculosis-related diseases compared to other biological agents. In contrast, IL-17 inhibitors show a greater variety and number of fungal infection-related AEs than their counterparts. Furthermore, our study has identified new potential AEs that require the attention of clinicians. CONCLUSION: In clinical practice, it is advisable to monitor the risks of infections and infestations in patients receiving biological agents for psoriasis to enable early detection and intervention. Our findings highlight the need for further epidemiological investigations to establish causality and guide clinical practice in managing these risks effectively.

5.
Water Res ; 267: 122546, 2024 Sep 29.
Article in English | MEDLINE | ID: mdl-39369506

ABSTRACT

Quantitative estimation is a key and challenging issue in water quality monitoring. Remote sensing technology has increasingly demonstrated its potential to address these challenges. Remote sensing imagery, combined with retrieval algorithms such as empirical band ratio methods, analytical bio-optical models, and semi-empirical three-band models, enables efficient, large-scale, real-time acquisition of water quality distribution characteristics, overcoming the limitations of traditional monitoring methods. Furthermore, artificial intelligence (AI), with its powerful autonomous learning capabilities and ability to solve complex problems, can deal with the nonlinear relationships between different spectral bands' apparent optical properties and various water quality parameter concentrations. This review provides a comprehensive overview of remote sensing applications in retrieving concentrations of nine water quality parameters, ranging from traditional methods to AI-based approaches. These parameters include chlorophyll-a (Chl-a), phycocyanin (PC), total suspended matter (TSM), colored dissolved organic matter (CDOM) and five non-optically active constituents (NOACs). Finally, it discusses five major issues that need further research in the application of remote sensing technology and AI in water quality monitoring. This review aims to provide researchers and relevant management departments with a potential roadmap and information support for innovative exploration in automated and intelligent water quality remote sensing monitoring.

6.
Int J Biol Macromol ; : 136430, 2024 Oct 08.
Article in English | MEDLINE | ID: mdl-39389494

ABSTRACT

Ficus carica (F. carica), commonly referred to as the fig tree, has received considerable attention due to its delectable and nutritious fruits. F. carica polysaccharides (FPs) are one of the key bioactive constituents of F. carica, demonstrating various biological activities such as antioxidative, immunomodulatory, anti-inflammatory, and antitumor effects, among others. Nevertheless, the extraction and purification techniques for FPs still require innovations to address their structural characteristics in order to elucidate the intricate mechanisms affecting their biological activities. Given this, the current review systematically summarizes the recent advancements in FPs, covering extraction, purification, structural characteristics, bioactivities, structure-activity relationships (SARs), current applications, challenges and future prospects. The composition of FPs predominantly includes Glu, Gal, and Rha, with a broad molecular weight distribution (ranging from 21.9 kDa to 6890 kDa). The SARs analysis suggests that the bioactivities of FPs are closely linked to their monosaccharide composition, molecular weight, uronic acid content, and configuration characteristics, underscoring the significant role of FPs in driving the development of novel bioactive compounds in the health, food, and medical sectors. In conclusion, this review would contribute the valuable research insights and provide the updated information to foster the advancement of FPs for diverse therapeutic and industrial applications.

7.
Environ Sci Technol ; 2024 Oct 10.
Article in English | MEDLINE | ID: mdl-39389766

ABSTRACT

Previous studies have detected microplastics (MPs) in human biological samples, such as lungs, alveolar lavage fluid, and thrombus. However, whether MPs induce health effects after inhalation are unclear. In this study, fluorescent polystyrene microplastics (PS-MPs) were found in the thymus, spleen, testes, liver, kidneys, and brain on day 1 or day 3 after one intratracheal instillation. Furthermore, mice showed inflammation in multiple organs, manifested as obvious infiltration of neutrophils and macrophages, increased Toll-like receptors (TLRs), myeloid differentiation primary response protein 88 (MyD88) and nuclear factor-κB (NF-κB), as well as proinflammatory cytokines (tumor necrosis factor (TNF)-α and interleukin (IL)-1ß) in the lungs, thymus, spleen, liver, and kidneys after four intratracheal instillations of PS-MPs at once every 2 weeks. Hepatic and renal function indexes were also increased. Subsequently, the inflammatory response in multiple murine organs was significantly alleviated by TLR2 and TLR4 inhibitors. Unexpectedly, we did not find any elevated secretion of monocyte chemotactic protein (MCP)-1 or TNF-α by RAW264.7 macrophages in vitro. Thus, PS-MPs induced inflammatory injuries in multiple murine organs via the TLRs/MyD88/NF-κB pathway in vivo, but not macrophages in vitro. These results may provide theoretical support for healthy protection against PS-MPs and their environmental risk assessment.

8.
Macromol Rapid Commun ; : e2400415, 2024 Oct 14.
Article in English | MEDLINE | ID: mdl-39401291

ABSTRACT

Bacterial infection of wound surfaces has posed a significant threat to human health and represents a formidable challenge in the clinical treatment. In this study, a novel antimicrobial hydrogel utilizing POM is synthesized as the primary component, with gelatin and sodium alginate as the structural framework. The resultant hydrogel demonstrates exceptional mechanical properties and viscoelasticity attributed to the hydrogen-bonded cross-linking between POM and gelatin, as well as the ionic cross-linking between sodium alginate and Ca2+. In addition, the integration of CuS nanoparticles conferred photothermal properties to the hydrogel system. To address the concerns regarding the potential thermal damage to the surrounding normal cells, this study employs a LT-PTT combined with CDT approach to achieve the enhanced antimicrobial efficacy while minimizing the inadvertent harm to the healthy cells. The findings suggested that POM-based hydrogels, serving as an inorganic-organic hybrid material, will represent a promising antimicrobial solution and offer valuable insights for the development of the non-antibiotic materials.

9.
Front Aging Neurosci ; 16: 1446523, 2024.
Article in English | MEDLINE | ID: mdl-39391586

ABSTRACT

Delirium is an acute, global cognitive disorder syndrome, also known as acute brain syndrome, characterized by disturbance of attention and awareness and fluctuation of symptoms. Its incidence is high among critically ill patients. Once patients develop delirium, it increases the risk of unplanned extubation, prolongs hospital stay, increases the risk of nosocomial infection, post-intensive care syndrome-cognitive impairment, and even death. Therefore, it is of great importance to understand how delirium occurs and to reduce the incidence of delirium in critically ill patients. This paper reviews the potential pathophysiological mechanisms of delirium in critically ill patients, with the aim of better understanding its pathophysiological processes, guiding the formulation of effective prevention and treatment strategies, providing a basis for clinical medication.

10.
Emerg Microbes Infect ; 13(1): 2399945, 2024 Dec.
Article in English | MEDLINE | ID: mdl-39230190

ABSTRACT

African swine fever (ASF), caused by African swine fever virus (ASFV), is a devastating infectious disease of domestic pigs and wild boar, which threatens the global pig industry. Endoplasmic reticulum (ER) is a multifunctional signaling organelle in eukaryotic cells that is involved in protein synthesis, processing, posttranslational modification and quality control. As intracellular parasitic organisms, viruses have evolved several strategies to modulate ER functions to favor their life cycles. We have previously demonstrated that the differentially expressed genes associated with unfolded protein response (UPR), which represents a response to ER stress, are significantly enriched upon ASFV infection. However, the correlation between the ER stress or UPR and ASFV replication has not been illuminated yet. Here, we demonstrated that ASFV infection induces ER stress both in target cells and in vivo, and subsequently activates the activating transcription factor 6 (ATF6) branch of the UPR to facilitate viral replication. Mechanistically, ASFV infection disrupts intracellular calcium (Ca2+) homeostasis, while the ATF6 pathway facilitates ASFV replication by increasing the cytoplasmic Ca2+ level. More specifically, we demonstrated that ASFV infection triggers ER-dependent Ca2+ release via the inositol triphosphate receptor (IP3R) channel. Notably, we showed that the ASFV B117L protein plays crucial roles in ER stress and the downstream activation of the ATF6 branch, as well as the disruption of Ca2+ homeostasis. Taken together, our findings reveal for the first time that ASFV modulates the ER stress-ATF6-Ca2+ axis to facilitate viral replication, which provides novel insights into the development of antiviral strategies for ASFV.


Subject(s)
Activating Transcription Factor 6 , African Swine Fever Virus , African Swine Fever , Calcium , Endoplasmic Reticulum Stress , Unfolded Protein Response , Virus Replication , Animals , African Swine Fever Virus/physiology , African Swine Fever Virus/genetics , Activating Transcription Factor 6/metabolism , Activating Transcription Factor 6/genetics , Swine , African Swine Fever/virology , African Swine Fever/metabolism , Calcium/metabolism , Endoplasmic Reticulum/metabolism , Endoplasmic Reticulum/virology , Vero Cells , Chlorocebus aethiops
11.
Biochem Biophys Res Commun ; 733: 150733, 2024 Nov 12.
Article in English | MEDLINE | ID: mdl-39332157

ABSTRACT

BACKGROUND: Obesity is a significant global public health issue linked to numerous chronic diseases, including diabetes, cardiovascular conditions, and various cancers. The vacuolar H + ATPase, a multi-subunit enzyme complex involved in maintaining pH balance, has been implicated in various health conditions, including obesity-related diseases. METHOD: This study conducts a comprehensive analysis of V-ATPase subunits' roles in adipogenesis within the context of obesity, using knockdown and RNAseq technologies. RESULT: This study conducts a comprehensive analysis of V-ATPase subunits' roles in adipogenesis, highlighting specific subunits, v0d2 and v1a, which show significant expression alterations. Our findings reveal that v1a plays a crucial role in adipocyte differentiation through pathways related to steroid and cholesterol metabolism. CONCLUSION: This study provides a comprehensive analysis of the roles played by V-ATPase subunits in adipogenesis and finds the critical role of V-ATPase subunits, particularly v1a, in the differentiation of adipocytes and their potential impact on obesity.


Subject(s)
Adipocytes , Adipogenesis , Cell Differentiation , Mice, Obese , Obesity , Vacuolar Proton-Translocating ATPases , Animals , Vacuolar Proton-Translocating ATPases/metabolism , Vacuolar Proton-Translocating ATPases/genetics , Mice , Adipocytes/metabolism , Adipocytes/cytology , Obesity/metabolism , Obesity/pathology , Obesity/genetics , Adipogenesis/genetics , Protein Subunits/metabolism , Protein Subunits/genetics , 3T3-L1 Cells , Mice, Inbred C57BL
12.
PLoS Pathog ; 20(9): e1012576, 2024 Sep.
Article in English | MEDLINE | ID: mdl-39325821

ABSTRACT

Cell-passage-adapted strains of African swine fever virus (ASFV) typically exhibit substantial genomic alterations and attenuated virulence in pigs. We have indicated that the human embryonic kidney (HEK293T) cells-adapted ASFV strain underwent genetic alterations and the I7L gene in the right variable region was deleted compared with the ASFV HLJ/2018 strain (ASFV-WT). A recent study has revealed that the deletion of the I7L-I11L genes results in attenuation of virulent ASFV in vivo, but the underlying mechanism remains largely unknown. Therefore, we hypothesized that the deletion of the I7L gene may be related to the pathogenicity of ASFV in pigs. We generated the I7L gene-deleted ASFV mutant (ASFV-ΔI7L) and found that the I7L gene deletion does not influence the replication of ASFV in primary porcine alveolar macrophages (PAMs). Using transcriptome sequencing analysis, we identified that the differentially expressed genes in the PAMs infected with ASFV-ΔI7L were mainly involved in antiviral immune responses induced by interferon gamma (IFN-γ) compared with those in the ASFV-WT-infected PAMs. Meanwhile, we further confirmed that the I7L protein (pI7L) suppressed the IFN-γ-triggered JAK-STAT signaling pathway. Mechanistically, pI7L interacts with STAT1 and inhibits its phosphorylation and homodimerization, which depends on the tyrosine at position 98 (Y98) of pI7L, thereby preventing the nuclear translocation of STAT1 and leading to the decreased production of IFN-γ-stimulated genes. Importantly, ASFV-ΔI7L exhibited reduced replication and virulence compared with ASFV-WT in pigs, likely due to the increased production of IFN-γ-stimulated genes, indicating that pI7L is involved in the virulence of ASFV. Taken together, our findings demonstrate that pI7L is associated with pathogenicity and antagonizes the IFN-γ-triggered JAK-STAT signaling pathway via inhibiting the phosphorylation and homodimerization of STAT1 depending on the Y98 residue of pI7L and the Src homology 2 domain of STAT1, which provides more information for understanding the immunoevasion strategies and designing the live attenuated vaccines against ASFV infection.


Subject(s)
African Swine Fever Virus , African Swine Fever , Interferon-gamma , STAT1 Transcription Factor , Signal Transduction , Viral Proteins , Animals , African Swine Fever Virus/pathogenicity , Swine , African Swine Fever/virology , African Swine Fever/metabolism , STAT1 Transcription Factor/metabolism , Interferon-gamma/metabolism , Phosphorylation , Humans , Viral Proteins/metabolism , Viral Proteins/genetics , Virulence , HEK293 Cells , Virus Replication , Janus Kinases/metabolism , Macrophages, Alveolar/virology , Macrophages, Alveolar/metabolism , Macrophages, Alveolar/immunology
13.
J Colloid Interface Sci ; 678(Pt C): 796-803, 2024 Sep 18.
Article in English | MEDLINE | ID: mdl-39312868

ABSTRACT

Chemodynamic therapy (CDT) and photothermal therapy (PTT) have both demonstrated considerable efficacy in the tumor treatment individually, owing to their non-invasive nature and excellent selectivity. However, due to the propensity of tumors for metastasis and recurrence, a singular therapeutic approach falls short of achieving optimal treatment outcomes. Polydopamine (PDA) has excellent photothermal conversion ability and polyoxometalates (POMs) possess diverse enzymatic activities. Here, we synthesized PDA@POM nanospheres comprising polydopamine-coated Tungsten-based polyoxometalate (W-POM). These nanospheres leverage dual enzymatic activities that synergistically enhance both chemodynamic and photothermal therapies for tumor treatment. The PDA-mediated PTT effect enables precise tumor cell destruction, while the W-POM nanozymes catalyzes the generation of highly toxic reactive oxygen species (ROS) from hydrogen peroxide within tumor cells through a Fenton-like reaction, which mitigates tumor hypoxia and induces tumor cell death. This synergistic photothermal catalytic therapy shows enhanced efficacy in tumor suppression, providing a promising new approach for tumor treatment.

14.
Int J Biol Macromol ; 280(Pt 4): 136135, 2024 Sep 28.
Article in English | MEDLINE | ID: mdl-39349078

ABSTRACT

Fu brick tea (FBT), a post-fermented dark tea, is highly esteemed for its abundant nutritional and medicinal values. Fu brick polysaccharides (FBTPs) are acidic heteropolysaccharides primarily composed of galactose and galacturonic acid, which are crucial components of FBT. FBTPs exhibit multiple bioactivities, including immunomodulatory, antioxidant, anti-inflammatory, regulatory effects on intestinal microbiota, anti-obesity, among others. Owing to their significant marketing potential and promising development prospects, FBTPs have attracted considerable attention from researchers worldwide. However, the specific mechanisms and underlying structure-function relationships of FBTPs are not well understood. Consequently, this review aims to provide comprehensive and cutting-edge information on the extraction, purification, structural characteristics, and biological activities of FBTPs, with an emphasis on exploring how their structural characteristics influence biological activities and therapeutic potential. We found that different materials and extraction techniques could result in differences in the structure-activity relationship of FBTPs. Furthermore, monosaccharide composition and molecular weight could also significantly impact the bioactivities of FBTPs, such as lipid-lowering effects and immunomodulatory activity. This review would further facilitate the applications of FBTPs as therapeutic agents and functional foods, thereby laying a solid foundation for their further development and utilization.

15.
Heliyon ; 10(16): e36388, 2024 Aug 30.
Article in English | MEDLINE | ID: mdl-39253229

ABSTRACT

This review examines combining tumor ablation therapy with immunotherapy for respiratory and digestive system tumors, particularly NSCLC and liver cancer. Despite advancements in traditional methods, they face limitations in advanced-stage tumors. Ablation techniques like RFA, MWA, and cryoablation offer minimally invasive options, while immune checkpoint inhibitors enhance the immune system's tumor-fighting ability. This review highlights their synergistic effects, clinical outcomes, and future research directions, including optimizing protocols, exploring new combinations, uncovering molecular mechanisms, advancing precision medicine, and improving accessibility. Combined therapy is expected to improve efficacy and patient outcomes significantly.

16.
J Sep Sci ; 47(17): e2400369, 2024 Sep.
Article in English | MEDLINE | ID: mdl-39252170

ABSTRACT

Epoxy resins, as important thermosetting polymers, exhibit excellent adhesion to various substrates. In view of this, reticulate coating of triglycidyl isocyanate with triethylenetetramine was introduced onto the surface of poly(styrene-divinylbenzene) utilizing amine curing reaction to obtain poly(styrene-divinylbenzene)@triglycidyl isocyanate-triethylenetetramine composite microspheres. The amino groups and epoxy groups of triglycidyl isocyanate-triethylenetetramine endowed poly(styrene-divinylbenzene) with good reactivity, which could be quaternized under mild conditions to obtain an anion exchange chromatographic stationary phase. The quaternized poly(styrene-divinylbenzene)@triglycidyl isocyanate-triethylenetetramine was characterized by scanning electron microscope, Fourier-transform infrared spectroscopy, N2 adsorption-desorption experiment, et al. The chromatographic performance of the customized column was evaluated by separating seven conventional anions, organic weak acids, and carbohydrates. Poly(styrene-divinylbenzene)@triglycidyl isocyanate-triethylenetetramine possesses the uniform size of poly(styrene-divinylbenzene) microspheres and good reactivity of triglycidyl isocyanate-triethylenetetramine, which offers a flexible strategy for the preparation of anion exchange stationary phase. The column exhibits excellent chemical and mechanical stability and chromatographic performance. Finally, the column was successfully applied for the determination of nitrite in pickles.

17.
Sensors (Basel) ; 24(17)2024 Aug 29.
Article in English | MEDLINE | ID: mdl-39275517

ABSTRACT

Surface engineering techniques can be used to develop high-performance gas sensing materials and advance the development of sensors. In this study, we improved the gas sensing performance of two-dimensional (2D) WO3 nanoplates by combining surface Zn modification and the in situ formation of ZnWO4/WO3 heterojunctions. Introducing Zn atoms by surface modification can reconstruct the atomic surface of 2D WO3 nanoplates, creating additional active sites. This allowed for the preparation of various types of ZnWO4/WO3 heterojunctions on the surface of the WO3 nanoplates, which improved the selectivity and sensitivity to the target gas triethylamine. The sensor exhibited good gas sensing performance for triethylamine even at low operating temperatures and strongly resisted humidity changes. The ZnWO4/WO3 material we prepared demonstrated a nearly threefold improvement in the triethylamine (TEA) response, with a gas sensing responsivity of 40.75 for 10 ppm of TEA at 250 °C. The sensor based on ZnWO4/WO3 has a limit of detection (LOD) for TEA of 200 ppb in practical measurements (its theoretical LOD is even as low as 31 ppb). The method of growing ZnWO4 on the surface of WO3 nanoplates using surface modification techniques to form surface heterojunctions differs from ordinary composites. The results suggest that the in situ construction of surface heterojunctions using surface engineering strategies, such as in situ modifying, is a practical approach to enhance the gas sensing properties and resistance to the humidity changes of metal oxide materials.

18.
Vet Microbiol ; 298: 110240, 2024 Sep 05.
Article in English | MEDLINE | ID: mdl-39255716

ABSTRACT

Pseudorabies virus (PRV) and classical swine fever virus (CSFV) are both economically important pathogens threatening the pig industry in many countries. The triple-gene-deleted variant of PRV, herein referred to as rPRVTJ-delgE/gI/TK, has exhibited pronounced efficacy and safety profiles. This underscores its viability as a prospective vaccine vector. However, the generation of specific anti-E2 antibodies necessitates elevated immunization doses and extended durations when the extracellular domain of the E2 protein of CSFV is secreted via the recombinant rPRVTJ-delgE/gI/TK vector. To enhance the presentation of exogenous antigens by antigen-presenting cells (APCs), we engineered the E2 protein expressed on the surface of PRV particles in this study. The recombinant virus expressing the E2 protein with a heterogonous transmembrane domain was generated in the backbone of rPRVTJ-delgE/gI/TK and designated as rPRVTJ-UL44-E2. The E2 gene was fused to the 3' terminus of the UL44 gene utilizing P2A, a self-cleaving peptide sequence. The electron microscopy showed that the E2 protein was anchored on the surface of the viral particles of rPRVTJ-delgE/gI/TK-E2. The insertion of the E2 gene did not alter the native biological characteristics of the viral vector. Rabbits immunized with 107 median tissue culture infective doses (TCID50) of rPRVTJ-UL44-E2 exhibited a rapid seroconversion to anti-E2 specific antibodies within 7 days post-immunization (dpi). All the rabbits immunized with the rPRVTJ-UL44-E2 had generated antibodies specific to E2 prior to the administration of the booster immunization. However, the immunized rabbits were not protected from the CSFV C-strain challenge. Nevertheless, this strategy has notably achieved rapid induction of E2-specific non-neutralizing antibodies. These findings provide insights that the design of rPRVTJ-UL44-E2 requires optimization, thereby indicating a promising avenue for augmenting vaccine-induced immune responses.

19.
Ultrason Sonochem ; 110: 107056, 2024 Nov.
Article in English | MEDLINE | ID: mdl-39232289

ABSTRACT

Based on sonochemistry, green synthesis methods play an important role in the development of nanomaterials. In this work, a novel chitosan modified MnMoO4/g-C3N4 (MnMoO4/g-C3N4/CHIT) was developed using ultrasonic cell disruptor (500 W, 30 kHz) for ultra-sensitive electrochemical detection of tinidazole (TNZ) in the environment. The morphology and surface properties of the synthesized MnMoO4/g-C3N4/CHIT electrode were characterized using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and transmission electron microscope (TEM). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques were utilized to assess the electrochemical performance of TNZ. The results indicate that the electrochemical detection performance of TNZ is highly efficient, with a detection limit (LOD) of 3.78 nM, sensitivity of 1.320 µA·µM-1·cm-2, and a detection range of 0.1-200 µM. Additionally, the prepared electrode exhibits excellent selectivity, desirable anti-interference capability, and decent stability. MnMoO4/g-C3N4/CHIT can be successfully employed to detect TNZ in both the Songhua River and tap water, achieving good recovery rates within the range of 93.0 % to 106.6 %. Consequently, MnMoO4/g-C3N4/CHIT's simple synthesis might provide a new electrode for the sensitive, repeatable, and selective measurement of TNZ in real-time applications. Using the MnMoO4/g-C3N4/CHIT electrode can effectively monitor and detect the concentration of TNZ in environmental water, guiding the sewage treatment process and reducing the pollution level of antibiotics in the water environment.


Subject(s)
Electrodes , Limit of Detection , Tinidazole , Tinidazole/analysis , Electrochemical Techniques/methods , Ultrasonic Waves , Molybdenum/chemistry , Water Pollutants, Chemical/analysis , Oxides/chemistry , Chitosan/chemistry , Graphite/chemistry
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