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1.
Mar Pollut Bull ; 208: 117022, 2024 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-39332333

RESUMO

Microplastics (MPs) are widespread ocean pollutants and many studies have explored their effects. However, research on MPs combined impact with copper (Cu) on dimethylated sulfur compound production is limited. Dimethyl sulfide (DMS) is an important biogenic sulfur compound related to global temperatures. This study examined the ecotoxicological effects of polyamide 6 MPs and Cu on dimethylsulfoniopropionate (DMSP), DMS, and dimethyl sulfoxide (DMSO) production in Manila clams (Ruditapes philippinarum). Our findings showed that MPs and Cu increased oxidative stress, indicated by higher superoxide anion radical production and malondialdehyde levels while decreasing glutathione contents and increasing superoxide dismutase activities. Additionally, MPs and Cu exposure reduced DMS and dissolved DMSO (DMSOd) concentrations due to decreased grazing. These results contribute to a better understanding of the ecotoxicological effects of MPs/Cu on bivalves and their roles in the organic sulfur cycle, suggesting a need for further research on long-term impacts on them.

2.
Mar Environ Res ; 202: 106754, 2024 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-39317087

RESUMO

This study investigated the impacts of sulfamethazine (SMZ) and oxytetracycline (OTC) antibiotics on the marine microalgae Nitzschia closterium and its release of volatile halocarbons (VHCs), which contribute to ozone depletion and climate change. High concentrations of SMZ and OTC suppressed cell density, reduced chlorophyll a content, and hindered Fv/Fm elevation in N. closterium, indicating its growth was inhibited. The exposure of N. closterium to antibiotics led to increased reactive oxygen species (ROS), reduced soluble protein content, and heightened catalase (CAT) activity, indicative of increased oxidative stress. This stress increased the release of three VHCs (CHBrCl2, CHBr2Cl, and CHBr3). Ship-borne experiments showed that high phytoplankton biomass was linked to high VHC release. Notably, the production and release of VHCs were significantly higher in the high-concentration antibiotic group (100 µg/L) than the low-concentration group (0.1 µg/L). These findings suggested that antibiotics induce excess ROS in algal cells, stimulating VHC production and release.

3.
Water Res ; 266: 122372, 2024 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-39241383

RESUMO

Benzothiazoles (BTHs), benzotriazoles (BTRs), and benzotriazole ultraviolet absorbers (BUVs) have garnered significant attention owing to their persistent nature in the environment and adverse impacts on aquatic organisms. However, there remains a dearth of investigations and studies conducted in tropical marine environments. In this study, we undertook the inaugural distributional survey and ecotoxicological relevance of BTHs, BTRs, and BUVs in seawater and sediments of the western South China Sea (WSCS). Elevated concentrations of BTHs, BTRs, and BUVs in the seawater and suspended particulate matter (SPM) were primarily observed in the Pearl River Estuary (PRE) and the western region of the WSCS, attributed to terrestrial runoff and hydrodynamic processes. Moreover, the transport of these compounds at the seawater-SPM interface was influenced by both the intrinsic properties of the contaminants and temperature variations. Spatially, concentrations of BTHs, BTRs, and BUVs in surface sediments exhibited a diminishing trend with increasing distance from the coast to offshore areas, reflecting notable anthropogenic impacts. Concentration profiles of these compounds in sediment cores displayed a bottom-up increasing trend, with total organic carbon (TOC) identified as the primary determinant governing their accumulation within sediment cores in the WSCS. Terrestrial runoff inputs and atmospheric deposition as major contributors to the occurrence of BTHs, BTRs, and BUVs in the WSCS. Simultaneously, the study underscores the non-negligible moderate mixture risk quotient associated with BTHs, BTRs, and BUVs in the sediments.

4.
J Multidiscip Healthc ; 17: 4243-4256, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39228515

RESUMO

Background: Clinical acupuncture decisions are highly operator-dependent and require physician-patient interactions. The Delphi method allows subjective factors such as expert experience and preference of patients to be taken into account in clinical decision making, which is particularly applicable to acupuncture. Currently, the Delphi method is widely used to support clinical decisions in acupuncture. Therefore, it is necessary to provide high-quality and complete descriptions of the Delphi process when making clinical decisions. This study aims to evaluate the quality of the Delphi process in acupuncture, facilitate its standardization and rigor for further clinical decision making in acupuncture. Methods: Articles sourced from six databases were searched systematically to assess the quality of the Delphi consensus process based on the standards for conducting and reporting Delphi studies (CREDES). Descriptive statistics and analysis were presented according to the percentage of each item. Five-score Likert scale was used to evaluate the reporting quality of four domains as well as each item in CREDES by two independent researchers, combined with ICC-value to assess the consistency. Results: A total of 37 qualified articles were included according to eligibility criteria. As for the low reporting rate, the item "External validation" was reported as the lowest positive rate at 32.43% and the item "Prevention of bias" was 48.65%. The item "Adequacy of conclusions", "Definition and attainment of consensus", and "Discussion of limitations" were reported at a positive ratio of 62.16%, 64.86%, and 67.57% individually. The average scores of the four domains based on CREDES from highest to lowest were, respectively, as follows: planning and design (68.75%), reporting (66.07%), rationale for the choice of the Delphi technique (65.54%), study conduct (45.10%). Conclusion: The reporting quality of the Delphi consensus process in acupuncture is acceptable currently, but the reporting rate on some items is still low. Further standardization, including either clearer checklists or study reports, should be developed and strengthened to guide clinical decisions in acupuncture.

5.
Water Res ; 267: 122475, 2024 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-39321728

RESUMO

Volatile sulfur compounds, such as dimethyl sulfide (DMS), carbonyl sulfide (OCS), and carbon disulfide (CS2), significantly influence atmospheric chemistry and climate change. Despite the oceans being an important source of these sulfides, the limited understanding of their biogeochemical cycles in seawater introduces considerable uncertainties in quantifying their oceanic emissions and assessing atmospheric OCS budgets. To address this issue, we conducted a comprehensive field survey in the tropical eastern Indian Ocean (EIO) to examine the spatial distributions, source-sink dynamics, and sea-air exchange fluxes of marine DMS, OCS, and CS2. Our study indicates that nutrients, organic matter, and freshwater input from terrestrial runoff significantly affect most of the source-sink processes of these sulfides in the Bay of Bengal and even the tropical EIO. The resulting sulfide accumulation in seawater combined with high wind speeds establishes the tropical EIO as a considerable direct and indirect atmospheric OCS source. These insights underscore the potentially critical role of marine environments influenced by runoff in contributing to the atmospheric OCS budget. However, by integrating these results with previous field surveys, we believe that actual OCS emissions from tropical oceans exceed some bottom-up box-model simulations, yet fall significantly below those predicted by top-down models, still insufficient to bridge the atmospheric OCS source gap. Our detailed examination of source-sink dynamics offers deeper insights into the marine sulfur cycle and has potential implications for refining future box-models, thus mitigating uncertainties in estimating marine sulfur emissions.

6.
Poult Sci ; 103(10): 104068, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39096825

RESUMO

Avian influenza virus (AIV) subtype H9N2 has significantly threatened the poultry business in recent years by having become the predominant subtype in flocks of chickens, ducks, and pigeons. In addition, the public health aspects of H9N2 AIV pose a significant threat to humans. Early and rapid diagnosis of H9N2 AIV is therefore of great importance. In this study, a new method for the detection of H9N2 AIV based on fluorescence intensity was successfully established using CRISPR/Cas13a technology. The Cas13a protein was first expressed in a prokaryotic system and purified using nickel ion affinity chromatography, resulting in a high-purity Cas13a protein. The best RPA (recombinase polymerase amplification) primer pairs and crRNA were designed and screened, successfully constructing the detection of H9N2 AIV based on CRISPR/Cas13a technology. Optimal concentration of Cas13a and crRNA was determined to optimize the constructed assay. The sensitivity of the optimized detection system is excellent, with a minimum detection limit of 10° copies/µL and didn't react with other avian susceptible viruses, with excellent specificity. The detection method provides the basis for the field detection of the H9N2 AIV.


Assuntos
Sistemas CRISPR-Cas , Galinhas , Edição de Genes , Vírus da Influenza A Subtipo H9N2 , Influenza Aviária , Doenças das Aves Domésticas , Vírus da Influenza A Subtipo H9N2/genética , Vírus da Influenza A Subtipo H9N2/isolamento & purificação , Influenza Aviária/virologia , Influenza Aviária/diagnóstico , Animais , Edição de Genes/métodos , Edição de Genes/veterinária , Doenças das Aves Domésticas/virologia , Doenças das Aves Domésticas/diagnóstico , Patos
7.
J Immunol ; 213(7): 1008-1022, 2024 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-39194407

RESUMO

The functions of the natural dsRNA sensors TLR3 (TRIF) and RIG-I (MAVS) are crucial during viral challenge and have not been accurately clarified in adaptive immune responses to rotavirus (RV) infection. In this study, we found that RV infection caused severe pathological damage to the small intestine of TLR3-/- and TRIF-/- mice. Our data found that dendritic cells from TLR3-/- and TRIF-/- mice had impaired Ag presentation to the RV and attenuated initiation of T cells upon viral infection. These attenuated functions resulted in impaired CD4+ T and CD8+ T function in mice lacking TLR3-TRIF signaling postinfection. Additionally, attenuated proliferative capacity of T cells from TLR3-/- and TRIF-/- mice was observed. Subsequently, we observed a significant reduction in the absolute number of memory T cells in the spleen and mesenteric lymph node (MLN) of TRIF-/- recipient mice following RV infection in a bone marrow chimeric model. Furthermore, there was reduced migration of type 2 classical dendritic cells from the intestine to MLNs after RV infection in TLR3-/- and TRIF-/- mice. Notably, RV infection resulted in attenuated killing of spleen and MLN tissues in TRIF-/- and MAVS-/- mice. Finally, we demonstrated that RV infection promoted apoptosis of CD8+ T cells in TRIF-/- and TLR3-/-MAVS-/- mice. Taken together, our findings highlight an important mechanism of TLR3 signaling through TRIF in mucosal T cell responses to RV and lay the foundation for the development of a novel vaccine.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Proteínas Adaptadoras de Transporte Vesicular , Células Dendríticas , Camundongos Knockout , Infecções por Rotavirus , Rotavirus , Transdução de Sinais , Receptor 3 Toll-Like , Animais , Receptor 3 Toll-Like/imunologia , Camundongos , Infecções por Rotavirus/imunologia , Transdução de Sinais/imunologia , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas Adaptadoras de Transdução de Sinal/imunologia , Rotavirus/imunologia , Células Dendríticas/imunologia , Camundongos Endogâmicos C57BL , Mucosa Intestinal/imunologia , Linfócitos T CD8-Positivos/imunologia , Imunidade nas Mucosas , Apresentação de Antígeno/imunologia
8.
Dev Comp Immunol ; 160: 105236, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39103005

RESUMO

Interferon-lambda receptor 1 (IFNLR1) is the key to interferon-lambda's biological activities. Rhesus macaques (Macaca mulatta) are supposedly more suitable for translational studies on interferon lambda-associated human diseases, yet little is known about their IFNLR1 (mmuIFNLR1). In this study, we cloned the coding sequence of mmuIFNLR1, examined its variants, and determined the distribution of mmuIFNLR1 mRNA and immunoreactivity in the buccal mucosa and arm skin of normal and immunodeficiency virus (SHIV/SIV) infected rhesus macaques. It was found that mmuIFNLR1 has 93.1% amino acid sequence identity to that of humans; all the amino acid residues of mmuIFNLR1 signal peptide, transmembrane region, PxxLxF motif and those essential for ligand binding are identical to that of humans; 6 variants of mmuIFNLR1, including the ones corresponding to that of humans were detected; IFNLR1 immunoreactivity was localized in primarily the epithelia of buccal mucosa and arm skin; SHIV/SIV infection could affect the levels of mmuIFNLR1 mRNA and immunoreactivity. These data expanded our knowledge on mmuIFNLR1 and provided a scientific basis for rational use of rhesus macaques in studies of IFN-λ associated human diseases like AIDS. Future studies testing IFNLR1-targeting therapeutics in rhesus macaques were warranted.


Assuntos
Macaca mulatta , Mucosa Bucal , Síndrome de Imunodeficiência Adquirida dos Símios , Vírus da Imunodeficiência Símia , Pele , Animais , Mucosa Bucal/imunologia , Mucosa Bucal/virologia , Pele/virologia , Pele/imunologia , Pele/metabolismo , Síndrome de Imunodeficiência Adquirida dos Símios/imunologia , Síndrome de Imunodeficiência Adquirida dos Símios/virologia , Vírus da Imunodeficiência Símia/imunologia , Vírus da Imunodeficiência Símia/fisiologia , Humanos , Sequência de Aminoácidos , Receptores de Interferon/genética , Receptores de Interferon/metabolismo , Clonagem Molecular
9.
Am J Rhinol Allergy ; : 19458924241269686, 2024 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-39093621

RESUMO

BACKGROUND: The Th2 cell polarization is a crucial factor in the pathogenesis of allergic diseases. The underlying mechanism requires further investigation. Telomerase has an immune-regulating ability. The aim of this study is to elucidate the association between telomerase and Th2 cell polarization in patients with allergic rhinitis (AR). METHODS: CD4+ T cells were isolated from blood samples collected from AR patients and healthy control subjects. RNA sequencing was employed to analyze RNA samples extracted from CD4+ T cells. An AR mouse model was established using the ovalbumin-alum protocol. RESULTS: High telomerase gene activity and high endoplasmic reticulum (ER) stress status were observed in CD4+ T-cells in patients with AR. Positive correlation between the telomerase reverse transcriptase (TERT) gene expression in CD4+ T cells and AR response in patients with AR. TERT facilitated the degradation of Foxp3 proteins in CD4+ T cells, resulting in the polarization of Th2 cells. Sensitization with the ovalbumin-alum protocol enhanced the Tert expression in CD4+ T cells by exacerbating ER stress. Conditional inhibition of the Tert or eukaryotic translation initiation factor 2-α (Eif2a) expression in CD4+ T cells effectively attenuated experimental AR in mice. CONCLUSIONS: Elevated amounts of telomerase in CD4+ T cells were found in CD4+ T cells of subjects with AR. Telomerase promoted Th2 cell polarization by inducing Foxp3 protein degradation and promotes GATA3 activation. Inhibition of TERT or eIF2a alleviated experimental AR.

10.
Environ Pollut ; 360: 124653, 2024 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-39095002

RESUMO

Protozoa play a pivotal role in the microbial cycle, and ciliated protozoan grazing habits are associated with dimethyl sulfide (DMS) cycle. Many studies have explored the impacts of nanoplastics (NPs) and microplastics (MPs) on ecotoxicological effects of ciliates. However, limited research exists on NPs and MPs influences on the production of organic sulfur compounds. The impact of NPs and MPs on the production of dimethyl sulfoxide (DMSO) and carbonyl sulfide (COS) remains unclear. Therefore, we examined the impacts of three concentrations (1 × 105, 5 × 105, and 1 × 106 items/mL) of polystyrene (PS) NPs (50 nm) and MPs (1 and 5 µm) on the ecotoxicology and DMS/dimethylsulfoniopropionate (DMSP)/DMSO/COS production in the ciliate Uronema marinum. NPs and MPs exposure were found to reduce the abundance, growth rate, volume, and biomass of U. marinum. Additionally, NPs and MPs increased the superoxide anion radical (O2˙─) production rates and malondialdehyde (MDA) contents (24 h), leading to a decline in glutathione (GSH) content and an ascend in superoxide dismutase (SOD) activity to mitigate the effects of reactive oxygen species (ROS). Exposure to PS NPs and MPs decreased the ingestion rates of algae by 7.5-14.4%, resulting in decreases in DMS production by 56.8-85.4%, with no significant impact on DMSO production. The results suggest a distinct pathway for the production of DMSO or COS compared to DMS. These findings help us to understand the NPs and MPs impacts on the marine ecosystem and organic sulfur compound yield, potentially influencing the global climate.


Assuntos
Antioxidantes , Cilióforos , Microplásticos , Cilióforos/fisiologia , Antioxidantes/metabolismo , Microplásticos/toxicidade , Poluentes Químicos da Água , Nanopartículas/toxicidade , Sulfetos/toxicidade
11.
Environ Pollut ; 360: 124649, 2024 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-39095004

RESUMO

Dimethyl sulfide (DMS) is a prevalent volatile organic sulfur compound relevant to the global climate. Ecotoxicological effects of nano- and microplastics (NPs and MPs) on phytoplankton, zooplankton, and bacteria have been investigated by numerous studies. Yet, the influences of NPs/MPs on dimethylated sulfur compounds remains understudied. Herein, we investigated the impacts of polystyrene (PS) NPs/MPs (80 nm, 1 µm, and 10 µm) on zooplankton grazing, chlorophyll a (Chl a) concentration, bacterial community, dimethylsulfoniopropionate (DMSP), and DMS production in the microcosms. Our findings revealed that rotifer grazing increased the production of DMS in the absence of NPs/MPs but did not promote DMS production when exposed to NPs/MPs. The ingestion rates of the rotifer and copepod exposed to NPs/MPs at high concentrations were significantly reduced. NPs/MPs exposure significantly decreased DMS levels in the treatments with rotifers compared to the animal controls. In the bacterial microcosms, smaller NPs/MPs sizes were more detrimental to Chl a concentrations compared to larger sizes. The study revealed a stimulatory effect on Chl a concentrations, DMSPd concentrations, and bacterial abundances when exposed to 10 µm MP with low concentrations. The effects of NPs/MPs on DMS concentrations were both dose- and size-dependent, with NPs showing greater toxicity compared to larger MPs. NPs/MPs led to changes in bacterial community compositions, dependent on both dosage and size. NPs caused a notable decrease in the alpha diversities and richness of bacteria compared to MPs. These results provide insights into the influences of NPs/MPs on food webs, and subsequently organic sulfur compounds cycles.


Assuntos
Bactérias , Poluentes Químicos da Água , Zooplâncton , Animais , Zooplâncton/efeitos dos fármacos , Bactérias/metabolismo , Bactérias/efeitos dos fármacos , Poluentes Químicos da Água/toxicidade , Poluentes Químicos da Água/metabolismo , Microplásticos/toxicidade , Compostos de Enxofre , Sulfetos/toxicidade , Nanopartículas/toxicidade , Clorofila A/metabolismo , Plásticos
12.
Environ Pollut ; 360: 124679, 2024 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-39116923

RESUMO

The Ulva prolifera bloom is considered one of the most serious ecological disasters in the Yellow Sea in the past decade, forming a carbon sink in its source area within a short period but becoming a carbon source at its destination. To explore the effects of different environmental changes on seawater dissolved carbon pools faced by living U. prolifera in its originating area, U. prolifera were cultured in three sets with different light intensity (54, 108, and 162 µmol m-2 s-1), temperature (12, 20, and 28 °C) and nitrate concentration gradients (25, 50, and 100 µmol L-1). The results showed that moderate light (108 µmol m-2 s-1), temperature (20 °C), and continuous addition of exogenous nitrate significantly enhanced the absorption of dissolved inorganic carbon (DIC) in seawater by U. prolifera and most promoted its growth. Under the most suitable environment, the changes in the seawater carbonate system were mainly dominated by biological production and denitrification, with less influence from aerobic respiration. Facing different environmental changes, U. prolifera continuously changed its carbon fixation mode according to tissue δ13C results, with the changes in the concentrations of various components of DIC in seawater, especially the fluctuation of HCO3- and CO2 concentrations. Enhanced light intensity of 108 µmol m-2 s-1 could shift the carbon fixation pathway of U. prolifera towards the C4 pathway compared to temperature and nitrate stimulation. Environmental conditions at the origin determined the amount of dissolved carbon fixed by U. prolifera. Therefore, more attention should be paid to the changes in marine environmental conditions at the origin of U. prolifera, providing a basis for scientific management of U. prolifera.


Assuntos
Sequestro de Carbono , Carbono , Água do Mar , Ulva , Ulva/metabolismo , Água do Mar/química , Nitratos/análise , Temperatura , Algas Comestíveis
13.
J Org Chem ; 89(15): 10660-10677, 2024 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-39024340

RESUMO

Two general protocols for the regioselective electrochemically enabled sulfonylation cyclization of N-alkenylacrylamides with sodium sulfinates or sulfonyl hydrazides were described. These methods were carried out under mild, chemical oxidant-free, and transition-metal-free conditions with a broad substrate scope and good functional group tolerance to provide sulfonyl-containing 4-pyrrolin-2-ones, which is readily scalable to the gram scale.

14.
Brain Behav ; 14(7): e3621, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38970239

RESUMO

INTRODUCTION: Hepatic encephalopathy (HE) is a severe neuropsychiatric complication of liver diseases characterized by neuroinflammation. The efficacies of nonabsorbable rifaximin (RIF) and lactulose (LAC) have been well documented in the treatment of HE. [18F]PBR146 is a translocator protein (TSPO) radiotracer used for in vivo neuroinflammation imaging. This study investigated anti-neuroinflammation effect of RIF or/and LAC in chronic HE rats by [18F]PBR146 micro-PET/CT. METHODS: Bile duct ligation (BDL) operation induced chronic HE models, and this study included Sham+normal saline (NS), BDL+NS, BDL+RIF, BDL+LAC, and BDL+RIF+LAC groups. Behavioral assessment was performed to analyze the motor function, and fecal samples were collected after successfully established the chronic HE model (more than 28 days post-surgery). In addition, fecal samples collection and micro-PET/CT scans were performed sequentially. And we also collected the blood plasma, liver, intestinal, and brain samples after sacrificing the rats for further biochemical and pathological analyses. RESULTS: The RIF- and/or LAC-treated BDL rats showed similar behavioral results with Sham+NS group, while the treatment could not reverse the biliary obstruction resulting in sustained liver injury. The RIF or/and LAC treatments can inhibit IFN-γ and IL-10 productions. The global brain uptake values of [18F]PBR146 in BDL+NS group was significantly higher than other groups (p < .0001). The brain regions analysis showed that the basal ganglia, hippocampus, and cingulate cortex had radiotracer uptake differences among groups (all p < .05), which were consistent with the brain immunohistochemistry results. Sham+NS group was mainly enriched in Christensenella, Coprobacillus, and Pseudoflavonifractor. BDL+NS group was mainly enriched in Barnesiella, Alloprevotella, Enterococcus, and Enterorhabdus. BDL+RIF+LAC group was enriched in Parabacteroides, Bacteroides, Allobaculum, Bifidobacterium, and Parasutterella. CONCLUSIONS: RIF or/and LAC had anti-neuroinflammation in BDL-induced chronic HE rats with gut microbiota alterations. The [18F]PBR146 could be used for monitoring RIF or/and LAC treatment efficacy of chronic HE rats.


Assuntos
Encefalopatia Hepática , Lactulose , Ratos Sprague-Dawley , Rifaximina , Animais , Encefalopatia Hepática/tratamento farmacológico , Encefalopatia Hepática/diagnóstico por imagem , Encefalopatia Hepática/metabolismo , Rifaximina/farmacologia , Ratos , Masculino , Lactulose/farmacologia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Modelos Animais de Doenças , Doenças Neuroinflamatórias/tratamento farmacológico , Doenças Neuroinflamatórias/diagnóstico por imagem , Fármacos Gastrointestinais/farmacologia , Fármacos Gastrointestinais/administração & dosagem , Encéfalo/diagnóstico por imagem , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Radioisótopos de Flúor , Proteínas de Transporte , Receptores de GABA-A
15.
Fitoterapia ; 177: 106142, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39067487

RESUMO

The investigation of the leaves of Pittosporum elevaticostatum Chang et Yan led to the isolation of fifteen pentacyclic triterpenoids (1-15), including five previously undescribed ones (1-5), and nine others (16-24). The structures of compounds 1-5 were elucidated based on comprehensive spectroscopic techniques, including one dimension (1D) and 2D nuclear magnetic resonance (NMR), high resolution electrospray ionization mass spectroscopy (HR-ESI-MS), and other methods. Compounds 2 and 13 demonstrated significant inhibitory activity against Listeria monocytogenes (L. monocytogenes) with minimum inhibitory concentration (MIC) values of 32 µM. Scanning electron microscopy (SEM) observations revealed insights into the antibacterial mechanism, indicating that compounds 2 and 13 either prevent biofilm formation of dispersed the preformed cell membranes. Additionally, compounds 1, 5, 7, and 12 exhibited anti-inflammatory activity on lipopolysaccharide (LPS)-stimulated BV-2 microglial cells with IC50 values ranging from 11.27 to 17.80 µM.


Assuntos
Antibacterianos , Anti-Inflamatórios , Listeria monocytogenes , Testes de Sensibilidade Microbiana , Triterpenos Pentacíclicos , Folhas de Planta , Folhas de Planta/química , Antibacterianos/farmacologia , Antibacterianos/isolamento & purificação , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/isolamento & purificação , Estrutura Molecular , Camundongos , Animais , Listeria monocytogenes/efeitos dos fármacos , Triterpenos Pentacíclicos/farmacologia , Triterpenos Pentacíclicos/isolamento & purificação , Compostos Fitoquímicos/farmacologia , Compostos Fitoquímicos/isolamento & purificação , Microglia/efeitos dos fármacos , Linhagem Celular , China
16.
Heliyon ; 10(13): e33553, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-39040236

RESUMO

Head and Neck Squamous Cell Carcinoma (HNSCC) is a widespread malignancy originating from the mucous epithelium of the oral cavity, pharynx, and larynx. Despite advances in diagnostic and therapeutic modalities, the prognosis of HNSCC remains challenging. This study investigates the intricate relationship among COPS5, immune infiltration patterns, and prognostic implications in HNSCC. Through comprehensive analyses of 519 HNSCC cases from TCGA and single-cell data from the GEO database, we utilize the CIBERSORT algorithm to discern immune cell dynamics influenced by COPS5 expression. Notably, Treg cells emerge as a central point in the interplay between COPS5 and immune modulation. Further analyses, encompassing differential gene expression, immune-related gene set enrichment, and protein-protein interaction networks, elucidate the molecular landscape associated with COPS5 in HNSCC. A prognostic risk model, incorporating CD27, TNFRSF4, FADD, and PSMD14, is formulated and validated across diverse datasets. The model demonstrates robust predictive power, underscoring its potential as a valuable prognostic tool. These genes, essential for immune regulation and cell cycle control, provide insights into the intricate mechanisms influencing HNSCC progression. In conclusion, this study not only reveals the impact of COPS5 on immune dynamics in HNSCC but also introduces a concise and effective prognostic model.

17.
Ann Vasc Surg ; 108: 564-571, 2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39025217

RESUMO

BACKGROUND: We aimed to investigate the potential correlation between the placement factors of various retrievable inferior vena cava filters and retrieval outcomes. Additionally, we aimed to identify the factors affecting the placement tilt of the filter. METHODS: This retrospective study was conducted at a tertiary care center to investigate patients who had previously undergone retrievable filter placement at our center and who subsequently had their filters removed between January 2020 and December 2021. Patient characteristics and filter-related factors were recorded. Complex filter retrieval was defined as cases that required a minimum of 8 minutes of fluoroscopy or that involved advanced techniques. Regression models were used to explore patient- and placement procedure-related factors that could influence retrieval outcomes and the placement tilt angle. RESULTS: The study included 163 patients, and all filters were successfully retrieved. Thirty-seven (22.7%) retrievals were classified as complex retrievals. The mean diameter of the inferior vena cava in the preplacement position for the entire cohort was 16 ± 1.8 mm. The median filter tilt angles at placement and retrieval were 5.0° (IQR, 1.8°-9°) and 4.6° (IQR, 2.1°-8.0°), respectively. The placement tilt angle was not significantly associated with complex retrieval (P = 0.59). The filter hook abutment to the vena cava wall (OR, 10.76, P = 0.003), dwell time (OR, 1.02, P = 0.029), and diameter of the vena cava (OR, 10.21, P < 0.001) were associated with complex retrieval. The diameter (P = 0.049), age (P = 0.049), and filter brand (P = 0.001) were found to be significantly associated with placement tilt. CONCLUSIONS: The inferior vena cava diameter at the time of placement predicts difficulty in filter retrieval. In addition, the filter hook abutting the inferior vena cava wall and long indwelling time may complicate retrieval. The vena cava diameter is also closely related to the degree of filter tilt.


Assuntos
Remoção de Dispositivo , Implantação de Prótese , Filtros de Veia Cava , Veia Cava Inferior , Humanos , Estudos Retrospectivos , Masculino , Feminino , Pessoa de Meia-Idade , Veia Cava Inferior/diagnóstico por imagem , Resultado do Tratamento , Idoso , Implantação de Prótese/instrumentação , Implantação de Prótese/efeitos adversos , Fatores de Risco , Adulto , Fatores de Tempo , Desenho de Prótese , Medição de Risco
18.
Artigo em Chinês | MEDLINE | ID: mdl-38858107

RESUMO

Non-steroidal anti-inflammatory drugs-exacerbated respiratory disease (N-ERD) is a chronic respiratory disease characterized by eosinophilic inflammation, featuring chronic rhinosinusitis (CRS), asthma, and intolerance to cyclooxygenase 1 (COX-1) inhibitors. The use of these medications can lead to an acute worsening of rhinitis and asthma symptoms. This condition has not yet received sufficient attention in China, with a high rate of misdiagnosis and a lack of related research. The Chinese Rhinology Research Group convened a group of leading young experts in otolaryngology from across the country, based on the latest domestic and international evidence-based medical practices to formulate this consensus.The consensus covers the epidemiology, pathogenesis, clinical manifestations, diagnostic methods, and treatment strategies for N-ERD, including pharmacotherapy, surgery, biologic treatments, and desensitization therapy. The goal is to improve recognition of N-ERD, reduce misdiagnosis, and enhance treatment outcomes.


Assuntos
Anti-Inflamatórios não Esteroides , Humanos , Anti-Inflamatórios não Esteroides/efeitos adversos , China , Rinite/diagnóstico , Rinite/terapia , Rinite/induzido quimicamente , Sinusite/diagnóstico , Sinusite/terapia , Sinusite/tratamento farmacológico , Consenso , Asma/diagnóstico , Asma/tratamento farmacológico , Doença Crônica
19.
Respir Med Case Rep ; 50: 102052, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38881775

RESUMO

Nephrotic syndrome (NS) had serious complications due to hypercoagulable state in both various venous and arteries which could lead thromboembolic events. we described a case of a 41-year-old man who presented with pulmonary artery thrombosis and was diagnosed with NS. Early diagnosis and management of nephrotic syndrome may prevent the occurrence of venous thromboembolism (VTE).

20.
Mar Pollut Bull ; 205: 116600, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38896958

RESUMO

The sorption behavior of phosphorus on marine sediments in the presence of black carbon derived from fly ash (FC) was studied. For both the FC and sediment samples, the kinetic curves could be described by a two-compartment first order equation, and the isotherms fit the Freundlich and Langmuir models well. The high specific surface area with abundant acidic functional groups of FC promoted the sorption and make this process more irreversible. The effects were more significant with higher amount of FC added. After sorption, more significant increase in Ex-P, Fe/Al-P and CaP was found in the sediment with FC added, while the organic groups in FC rarely react with phosphorus to form OP. The pH of medium influenced the sorption character, and FC promoted the process significantly at pH < pHPZNPC. The sorption was endothermic with an increase in randomness. The presence of FC had little effects on the thermodynamic parameters.


Assuntos
Cinza de Carvão , Sedimentos Geológicos , Fósforo , Poluentes Químicos da Água , Sedimentos Geológicos/química , Fósforo/química , Fósforo/análise , Cinza de Carvão/química , Adsorção , Poluentes Químicos da Água/química , Poluentes Químicos da Água/análise , Cinética , Fuligem/química , Carbono/química , Termodinâmica
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