Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 23
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Neuroimage ; 293: 120624, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38657745

RESUMO

Pain empathy, defined as the ability of one person to understand another person's pain, shows large individual variations. The anterior insula is the core region of the pain empathy network. However, the relationship between white matter (WM) properties of the fiber tracts connecting the anterior insula with other cortical regions and an individual's ability to modulate pain empathy remains largely unclear. In this study, we outline an automatic seed-based fiber streamline (sFS) analysis method and multivariate pattern analysis (MVPA) to predict the levels of pain empathy in healthy women and women with primary dysmenorrhoea (PDM). Using the sFS method, the anterior insula-based fiber tract network was divided into five fiber cluster groups. In healthy women, interindividual differences in pain empathy were predicted only by the WM properties of the five fiber cluster groups, suggesting that interindividual differences in pain empathy may rely on the connectivity of the anterior insula-based fiber tract network. In women with PDM, pain empathy could be predicted by a single cluster group. The mean WM properties along the anterior insular-rostroventral area of the inferior parietal lobule further mediated the effect of pain on empathy in patients with PDM. Our results suggest that chronic periodic pain may lead to maladaptive plastic changes, which could further impair empathy by making women with PDM feel more pain when they see other people experiencing pain. Our study also addresses an important gap in the analysis of the microstructural characteristics of seed-based fiber tract network.


Assuntos
Dismenorreia , Empatia , Individualidade , Córtex Insular , Substância Branca , Humanos , Feminino , Dismenorreia/diagnóstico por imagem , Dismenorreia/fisiopatologia , Substância Branca/diagnóstico por imagem , Substância Branca/patologia , Empatia/fisiologia , Adulto , Adulto Jovem , Córtex Insular/diagnóstico por imagem , Imagem de Tensor de Difusão/métodos , Dor/psicologia , Dor/fisiopatologia , Dor/diagnóstico por imagem , Vias Neurais/diagnóstico por imagem , Vias Neurais/fisiopatologia , Imageamento por Ressonância Magnética , Rede Nervosa/diagnóstico por imagem , Rede Nervosa/fisiopatologia , Córtex Cerebral/diagnóstico por imagem
2.
Neuroimage ; 284: 120452, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-37949258

RESUMO

Pain empathy is a complex form of psychological inference that enables us to understand how others feel in the context of pain. Since pain empathy may be grounded in our own pain experiences, it exhibits huge inter-individual variability. However, the neural mechanisms behind the individual differences in pain empathy and its association with pain perception are still poorly understood. In this study, we aimed to characterize brain mechanisms associated with individual differences in pain empathy in adult participants (n = 24). The 32-channel electroencephalography (EEG) was recorded at rest and during a pain empathy task, and participants viewed static visual stimuli of the limbs submitted to painful and nonpainful stimulation to solicit empathy. The pain sensitivity of each participant was measured using a series of direct current stimulations. In our results, the N2 of Fz and the LPP of P3 and P4 were affected by painful pictures. We found that both delta and alpha bands in the frontal and parietal cortex were involved in the regulation of pain empathy. For the delta band, a close relationship was found between average power, either in the resting or task state, and individual differences in pain empathy. It suggested that the spectral power in Fz's delta band may reflect subjective pain empathy across individuals. For the alpha band, the functional connectivity between Fz and P3 under painful picture stimulation was correlated to individuals' pain sensitivity. It indicated that the alpha band may reflect individual differences in pain sensitivity and be involved in pain empathy processing. Our results suggested the distinct role of the delta and alpha bands of EEG signals in pain empathy processing and may deepen our understanding of the neural mechanisms underpinning pain empathy.


Assuntos
Empatia , Individualidade , Adulto , Humanos , Eletroencefalografia , Dor , Percepção da Dor/fisiologia
3.
Environ Toxicol ; 38(4): 914-925, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36602389

RESUMO

The dibutyl phthalate (DBP) has been detected in fetuses and infants and can cause damage to the reproductive system in adulthood, but the exact mechanism remains unclear. Here, we aim to investigate the effects of intrauterine DBP exposure on offspring reproductive function and explore possible mechanisms. SPF C57BL/6 pregnant mice were given DBP (0.5, 5, 75 mg/kg/d) or corn oil from day 5 to day 19 by gavage. After weaning, the pups were fed a standard diet for 5 weeks. In addition, TM3 Leydig cell cultures were used to study the relevant mechanisms in vitro. The results showed that intrauterine DBP exposure could reduce sperm density and sperm motility, cause testicular tissue damage, down-regulate serum T and LH levels, and up-regulate serum FSH levels at 75 mg/kg/d. Western blot and methylation detection revealed intrauterine exposure to DBP down-regulated testosterone synthesis-related proteins StAR, P450scc, 3ß-HSD, PKA, and PKC expression, while up-regulated the levels of methyltransferase proteins expression and DNA 5-methylcytosine (5mC) in testicular tissue of mouse offspring at 75 mg/kg/d. Further detection found in utero 75 mg/kg/d DBP exposure down-regulated MGARP protein expression, and induced incomplete methylation of the MGARP gene. An in vitro analysis showed that MGARP inhibition is involved in an impaired testosterone synthesis in TM3 cells. Cell culture results suggest that MGARP down-regulation may be involved in impaired testosterone production in monobutyl phthalate-treated cells. The present study revealed that 75 mg/kg/d DBP exposure in utero resulted in testosterone synthesis disorders and reproductive function impairment in mouse offspring, and the mechanism may be related to DNA methylation-mediated down-regulation of MGARP in the testis.


Assuntos
Metilação de DNA , Dibutilftalato , Animais , Feminino , Masculino , Camundongos , Gravidez , Dibutilftalato/farmacologia , Camundongos Endogâmicos C57BL , Sêmen/metabolismo , Motilidade dos Espermatozoides , Testículo , Testosterona
4.
Org Biomol Chem ; 21(1): 153-162, 2022 12 21.
Artigo em Inglês | MEDLINE | ID: mdl-36472095

RESUMO

The disordered tubulin C-terminal tail (CTT), which possesses a higher degree of heterogeneity, is the target for the interaction of many proteins and cellular components. Compared to the seven well-described binding sites of microtubule-targeting agents (MTAs) that localize on the globular tubulin core, tubulin CTT is far less explored. Therefore, tubulin CTT can be regarded as a novel site for the development of MTAs with distinct biochemical and cell biological properties. Here, we designed and synthesized linear and cyclic peptides containing multiple arginines (RRR), which are complementary to multiple acidic residues in tubulin CTT. Some of them showed moderate induction and promotion of tubulin polymerization. The most potent macrocyclic compound 1f was found to bind to tubulin CTT and thus exert its bioactivity. Such RRR containing compounds represent a starting point for the discovery of tubulin CTT-targeting agents with therapeutic potential.


Assuntos
Antineoplásicos , Tubulina (Proteína) , Tubulina (Proteína)/metabolismo , Microtúbulos/metabolismo , Antineoplásicos/farmacologia , Sítios de Ligação , Moduladores de Tubulina/farmacologia , Moduladores de Tubulina/metabolismo
5.
Mar Drugs ; 20(4)2022 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-35447931

RESUMO

This study aimed to explore the mechanism of fucoidan in chronic kidney disease (CKD)-triggered cognitive dysfunction. The adenine-induced ICR strain CKD mice model was applied, and RNA-Seq was performed for differential gene analysis between aged-CKD and normal mice. As a result, fucoidan (100 and 200 mg kg-1) significantly reversed adenine-induced high expression of urea, uric acid in urine, and creatinine in serum, as well as the novel object recognition memory and spatial memory deficits. RNA sequencing analysis indicated that oxidative and inflammatory signaling were involved in adenine-induced kidney injury and cognitive dysfunction; furthermore, fucoidan inhibited oxidative stress via GSK3ß-Nrf2-HO-1 signaling and ameliorated inflammatory response through regulation of microglia/macrophage polarization in the kidney and hippocampus of CKD mice. Additionally, we clarified six hallmarks in the hippocampus and four in the kidney, which were correlated with CKD-triggered cognitive dysfunction. This study provides a theoretical basis for the application of fucoidan in the treatment of CKD-triggered memory deficits.


Assuntos
Disfunção Cognitiva , Laminaria , Insuficiência Renal Crônica , Adenina , Idoso , Animais , Disfunção Cognitiva/tratamento farmacológico , Feminino , Humanos , Masculino , Transtornos da Memória , Camundongos , Camundongos Endogâmicos ICR , Estresse Oxidativo , Polissacarídeos , Insuficiência Renal Crônica/tratamento farmacológico
6.
Molecules ; 25(7)2020 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-32260500

RESUMO

Benzothiazoles have played an important role in the field of biochemistry and medicinal chemistry due to their highly pharmaceutical and biological activity. The development of synthetic processes is undoubtedly one of the most significant problems facing researchers. In this review paper, we provided recent advances in the synthesis of benzothiazole compounds related to green chemistry from condensation of 2-aminobenzenethiol with aldehydes/ketones/acids/acyl chlorides and the cyclization of thioamide or carbon dioxide (CO2) as raw materials, and the future development trend and prospect of the synthesis of benzothiazoles were anticipated.


Assuntos
Benzotiazóis/química , Química Verde/métodos , Fenóis/química , Compostos de Sulfidrila/química , Animais , Dióxido de Carbono/química , Humanos , Estrutura Molecular
7.
Chemosphere ; 352: 141405, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38331265

RESUMO

This study demonstrated the design and fabrication of flower-like Ni/Mn-MOFs materials, and three-dimensional ultrathin flower-like Ni/Mn/MC microspheres were fabricated by embedding metal or metal oxide nanoparticles into a porous carbon skeleton via high-temperature pyrolysis at 600 °C and used for the electrocatalytic degradation of ceftriaxone sodium. This unique ultrathin porous flower-like structure can expose more active sites, provide rapid ion/electron transfer, and improve electrocatalytic activity. Meanwhile, the excellent electrical conductivity of the carbon skeleton, as well as the rational composition and synergistic effect of the two components, can promote the generation of active radicals (•OH and •O2-) in the reaction system, which accelerates the electrochemical degradation process and improves the electrocatalytic degradation performance. The results showed that the Ni/Mn/MC-5:1 composite prepared when the molar ratio of Ni: Mn was 5:1 exhibited the best electrocatalytic degradation performance for the degradation of sodium ceftriaxone. The composites showed 98.2% degradation of ceftriaxone sodium in 120 min and maintained sound degradation after 20 cycles. Therefore, we concluded that this novel multicomponent composite has good electrocatalytic activity and stability for the degradation of antibiotic wastewater.


Assuntos
Nanopartículas Metálicas , Estruturas Metalorgânicas , Ceftriaxona , Microesferas , Carbono , Óxidos
8.
Brain Imaging Behav ; 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38954259

RESUMO

Pain empathy enables us to understand and share how others feel pain. Few studies have investigated pain empathy-related functional interactions at the whole-brain level across all networks. Additionally, women with primary dysmenorrhea (PDM) have abnormal pain empathy, and the association among the whole-brain functional network, pain, and pain empathy remain unclear. Using resting-state functional magnetic resonance imaging (fMRI) and machine learning analysis, we identified the brain functional network connectivity (FNC)-based features that are associated with pain empathy in two studies. Specifically, Study 1 examined 41 healthy controls (HCs), while Study 2 investigated 45 women with PDM. Additionally, in Study 3, a classification analysis was performed to examine the differences in FNC between HCs and women with PDM. Pain empathy was evaluated using a visual stimuli experiment, and trait and state of menstrual pain were recorded. In Study 1, the results showed that pain empathy in HCs relied on dynamic interactions across whole-brain networks and was not concentrated in a single or two brain networks, suggesting the dynamic cooperation of networks for pain empathy in HCs. In Study 2, PDM exhibited a distinctive network for pain empathy. The features associated with pain empathy were concentrated in the sensorimotor network (SMN). In Study 3, the SMN-related dynamic FNC could accurately distinguish women with PDM from HCs and exhibited a significant association with trait menstrual pain. This study may deepen our understanding of the neural mechanisms underpinning pain empathy and suggest that menstrual pain may affect pain empathy through maladaptive dynamic interaction between brain networks.

9.
Sci Total Environ ; 940: 173594, 2024 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-38821281

RESUMO

The temperature stratification in reservoirs post-construction carries substantial environmental implications. A MIKE11-2DV model was developed to simulate yearly water temperature changes in the newly established Qincun Reservoir. Sensitivity analysis was performed to assess the influence of eight key parameters on the model's performance. Linear and Boltzmann curves were employed to fit water temperature profiles and extract four features for quantitative sensitivity analyses. In addition, a comparative analysis was conducted considering two different withdrawal scenarios. The SSI were employed for the assessment of thermal stratification. The MIKE11-2DV model demonstrated a high accuracy in simulating hydrodynamics and water temperature in the monomictic reservoir. A sensitivity analysis showed varying levels of sensitivity among model parameters. Specifically, the hypolimnetic water temperature was highly sensitive to the vertical viscosity factor but almost insensitive to the horizontal factor. Additionally, the light attenuation coefficient and constant in Beer's law significantly influenced the thermocline. Radiation and evaporation parameters affected overall the water temperature, maintaining a stable "shape". Furthermore, the initial scenarios simulation results showed that initial water temperature significantly affected the hypolimnion. The analysis of the thermal structure based on two water intake scenarios revealed that multi-level withdrawal had a higher Schmidt's Stability Index (SSI) and a longer stratified period compared to single-level withdrawal. During the fish breeding season, using multi-level water intake resulted in higher outlet temperatures than single-level water intake. The SSI reflected both temporal and spatial heterogeneity. Hysteresis behavior was observed between SSI and air temperature, with the hysteresis loops' direction being influenced by different water intake levels. Enhanced hysteresis was observed in deeper reservoir segments during multi-level water intake scenario. These findings provide novel insights for interpreting thermal stratification in reservoirs.

10.
Environ Sci Pollut Res Int ; 30(14): 41486-41504, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36633750

RESUMO

A special conical diffuser was presented and fixed on the top of the filter cartridge to improve the flow field. The existence of the diffuser can disperse the jet flow from the nozzle, and the high-speed airflow can act on more areas of the filter cartridge, including the top area of the filter cartridge. To improve the cleaning efficiency, the present study is aimed at optimizing the structure of the filter cartridge. The DPM model was used to simulate the dust dispersion process and the falling dust sedimentation from the filter under the action of the pulsed airflow. To validate the established model, the pressure values at the monitoring points were analyzed and compared with the related experimental results. It is found that the pressure values are consistent with the experimental results. Moreover, the installation distance and the size of the diffuser were studied and their influence on the dust distribution on the surface of the filter cartridge. It is found that the dust removal effect is relatively better when the installation distance is 90 mm and the size radius is 25 mm. The maximum dust concentration can be reduced by 15 mg/m3. The present research results can provide theoretical guidance for the cleaning process of the filter cartridge and finally improve the dust-removal efficiency of the dust collector.


Assuntos
Poeira , Filtração , Frequência Cardíaca
11.
ACS Appl Mater Interfaces ; 15(47): 54499-54509, 2023 Nov 29.
Artigo em Inglês | MEDLINE | ID: mdl-37962277

RESUMO

Achieving fast and durable potassiation/depotassiation of anode materials for potassium ion batteries (PIB) still remains an elusive yet fascinating goal. Herein, we challenge the conventional wisdom in synthesizing the TiP2O7 superstructure and report a nanocarbon coating on TiP2O7 (TiP2O7/C) using layered MXene as a Ti source to realize an effective tuning in the TiO6 and PO4 building blocks for boosting the K+ diffusion kinetics in PIB. Experimental investigations coupled with systematic theoretical simulations indicate that the interface interaction between TiP2O7 and coated nanocarbon could induce internal adjustment in individual Ti-O bonding and relieve the local distortions of TiO6 octahedra, which endows the TiP2O7/C with favorable regulation in a K+ hopping manner and significantly reduces the K+ diffusion barrier via the diffusion propagation along PO4 blocks with dominant coordination between O/P and K+. Consequently, the TiP2O7/C anode could retain 230 mA h g-1 even after 2200 long-term cycles with an ultralow degradation rate of 0.005%.

12.
Environ Sci Pollut Res Int ; 30(29): 73213-73230, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37183224

RESUMO

The present study investigates dust generated from the unloading process in a high-rise building for the mine hoist system and analyzes dust dispersion with the moving conveyance in the building. First, the gas-solid two-phase flow in the building was investigated based on the CFD-DPM method. In particular, the moving conveyance was considered in detail and treated via the dynamic mesh technology. Then, the airflow and dust distribution were investigated in the building. The airflow and the dust concentration at selected points show good agreement with the relative results of field measurements by ourselves. It is found that the descending conveyance significantly influences the surrounding flow field and the spatial and temporal distribution of dust. Dust concentration before the dust source (2 m × 2 m) is high, which extends downward with the conveyance. Dust concentration of the lower floors increases obviously when compared with that of the condition without the movement of the conveyance. The descending velocity of the conveyance also affects the amount of PM2.5 discharged from the return air outlet. The fitting functions are provided to predict PM2.5 emissions to the surrounding atmosphere. The research results are of great significance for the improvement of the dust control system for cleaner production technology.


Assuntos
Minas de Carvão , Carvão Mineral , Carvão Mineral/análise , Monitoramento Ambiental/métodos , Poeira/análise
13.
Sci Total Environ ; 847: 157624, 2022 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-35905958

RESUMO

Permafrost thaw due to climate change is altering terrestrial hydrological processes by increasing ground hydraulic conductivity and surface and subsurface hydrologic connectivity across the pan-Arctic. Understanding how runoff responds to changes in hydrologic processes and conditions induced by permafrost thaw is critical for water resources management in high-latitude and high-altitude regions. In this study, we analyzed streamflow recession characteristics for 1964-2016 for the Tahe watershed located at the southern margin of the permafrost region in Eurasia. Results reveal a link between streamflow recession and permafrost degradation as indicated by the statistical analyses of streamflow and the modeled ground warming and active layer thickening. The recession constant and the active layer temperatures at depths of 5, 40, 100, and 200 cm simulated by the backpropagation neural network model significantly increased during the study period from 1972 to 2020 due to intensified climate warming in northeastern China. The onset of seasonal active layer thaw was advanced by 10 days, and the modeled active layer thickness increased by 54 cm in this period. The average annual streamflow recession time increased by 11.5 days (+53 %) from the warming period (1972-1988) to the thawing period (1989-2016), with these periods determined from breakpoint analysis. These hydrologic changes arose from increased catchment storage and were correlated to increased active layer thickness and longer seasonal thawing periods. These results highlight that permafrost degradation can significantly extend the recession flow duration in a watershed underlain by discontinuous, sporadic, and isolated permafrost, and thereby alter flooding dynamics and water resources in the southern margin of the Eurasian permafrost region.


Assuntos
Pergelissolo , Regiões Árticas , Mudança Climática , Hidrologia , Água
14.
3 Biotech ; 12(8): 161, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35818470

RESUMO

One new natural alkaloid, chaetominine B (1), together with twenty known compounds was isolated from the South China Sea cold-seep-derived fungus Talaromyces helicus SCSIO41311. Their structures were elucidated on the basis of nuclear magnetic resonance spectrum (NMR), mass spectrometry (MS) and ECD calculation, as well as comparing with previous literatures. Among them, twelve compounds showed potent NO inhibitory activities and two of them, azaspirofurans A (13) and fumiquinones B (21), exhibited NO inhibitory effects more than the positive control eicosapentaenoic acid (EPA) with IC50 values of 9.65 and 15.54 µM, respectively. Moreover, compound 13 attenuated LPS-induced imbalance of cytokines release such as TNF-α, IL-1ß, IL-4, and IL-10. Additionally, the NMR data and absolute configuration of compound 20 were first reported. Supplementary Information: The online version contains supplementary material available at 10.1007/s13205-022-03237-9.

15.
Environ Sci Pollut Res Int ; 29(25): 38038-38053, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35072872

RESUMO

Dust pollutants generated from the coal transfer process in a high-rise building of the mine hoisting system not only undermine the operating environment but also reduce the surrounding air quality. Therefore, this study aimed to determine the spatiotemporal distribution of coal dust in the high-rise buildings using field measurement and numerical simulation. Based on the discrete phase model (DPM), the dust migration process under the hybrid ventilation system was investigated in detail. Then, the feasibility of the established model to predict the spatiotemporal distribution of dust pollutants was proven through the measurements of both the airflow and the dust concentration. The present study showed that dust distribution is not uniform in time and space, which also differs for different floors. The dust concentration of the 3rd floor is relatively larger when compared with those of other floors. The dust concentration increases for the upper floors when the upward air velocity increases, while those of the lower floors are not always low due to the backflows, particularly for the 2nd floor. PM2.5 takes up more than 20% of all discharged particles.


Assuntos
Poluição do Ar , Minas de Carvão , Poluentes Ambientais , Carvão Mineral/análise , Poeira/análise
16.
Front Pharmacol ; 13: 972813, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35979234

RESUMO

Panax quinquefolius L. has attracted extensive attention worldwide because of its prominent pharmacological properties on type 2 diabetes, cancers, central nervous system, and cardiovascular diseases. Ginsenosides are active phytochemicals of P. quinquefolius, which can be classified as propanaxdiol (PPD)-type, propanaxtriol (PPT)-type, oleanane-type, and ocotillol-type oligo-glycosides depending on the skeleton of aglycone. Recently, advanced analytical and isolated methods including ultra-performance liquid chromatography tandem with mass detector, preparative high-performance liquid chromatography, and high speed counter-current chromatography have been used to isolate and identify minor components in P. quinquefolius, which accelerates the clarification of the material basis. However, the poor bioavailability and undetermined bio-metabolism of most saponins have greatly hindered both the development of medicines and the identification of their real active constituents. Thus, it is essential to consider the bio-metabolism of constituents before and after absorption. In this review, we described the structures of minor ginsenosides in P. quinquefolius, including naturally occurring protype compounds and their in vivo metabolites. The preclinical and clinical pharmacological studies of the ginsenosides in the past few years were also summarized. The review will promote the reacquaint of minor saponins on the growing appreciation of their biological role in P. quinquefolius.

17.
Front Pharmacol ; 13: 1077222, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36699095

RESUMO

Alzheimer's disease (AD), the most common type of dementia, is an ageing-related progressive neurodegenerative brain disorder. Extracellular neuritic plaques composed of misfolded amyloid ß (Aß) proteins and intracellular neurofibrillary tangles formed by hyperphosphorylated tau protein are the two classical characteristics of AD. Aß and tau pathologies induce neurite atrophy and neuronal apoptosis, leading to cognitive, language, and behavioral deficits. For decades, researchers have made great efforts to explore the pathogens and therapeutics of AD; however, its intrinsic mechanism remains unclear and there are still no well-established strategies to restore or even prevent this disease. Therefore, it would be beneficial for the establishment of novel therapeutic strategy to determine the intrinsic molecular mechanism that is interrelated with the initiation and progression of AD. A variety of evidence indicates that neuroinflammation plays a crucial role in the pathogenesis of AD. Nucleotide-binding oligomerization domain (NOD)-like receptor pyrin domain-containing protein 3 (NLRP3) is a key inflammasome sensor of cellular stress and infection that is involved in the innate immune system. In response to a wide range of stimuli like Aß, NLRP3 assembles apoptosis-associated speck-like protein (ASC) and procaspase-1 into an inflammasome complex to induce the caspase-1 mediated secretion of interleukin (IL)-1ß/IL-18 in M1 polarized microglia, triggering the pathophysiological changes and cognitive decline of AD. Therefore, targeting NLRP3 inflammasome seems an efficient path for AD treatment via regulating brain immune microenvironment. Furthermore, accumulating evidence indicates that traditional Chinese medicine (TCM) exerts beneficial effects on AD via NLRP3 inflammasome inactivation. In this review, we summarize current reports on the role and activated mechanisms of the NLRP3 inflammasome in the pathogenesis of AD. We also review the natural products for attenuating neuroinflammation by targeting NLRP3 inflammasome activation, which provides useful clues for developing novel AD treatments.

18.
J Colloid Interface Sci ; 606(Pt 1): 748-757, 2022 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-34418755

RESUMO

Although solar energy is promising for water purification, there is still a room for further improving the solar steam generation efficiency. Herein, an environmental energy-enhanced solar steam evaporator is fabricated by immersing a cellulose acetate fiber-based cigarette filter (CF) in an aqueous solution of polyvinyl alcohol (PVA) followed by freeze-drying and decorating with MXene sheets. The presence of MXene is to absorb solar light and convert solar energy to thermal energy for efficient water evaporation, while the porous PVA network generated inside the pores of the filter during the freeze-drying process accommodates the dispersed MXene sheets and interconnects the CF and MXene. Because of the constructed PVA/MXene network inside the CF porous architecture and the hydrophilic feature of both MXene and PVA, the resultant MXene/PVA modified CF (MPCF) is highly hydrophilic and competent for rapid upward transfer of water. Interestingly, in addition to the normal energy input by the incident solar light, the large-area sidewall of MPCF gains thermal energy from the environment in the forms of heat convection and heat radiation to enhance the solar steam generation efficiency, resulting in an ultrahigh water evaporation rate of 3.38 kg m-2 h-1 with an outstanding evaporation efficiency of 132.9%.


Assuntos
Vapor , Produtos do Tabaco , Celulose/análogos & derivados , Luz Solar
19.
Food Res Int ; 158: 111576, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35840261

RESUMO

Pseudostellaria heterophylla, has historically been used as medicine food homology plant for thousand years in China. Our previous studies had indicated that daily intake of Pseudostellaria heterophylla extract enhanced cognitive memory. Herein, heterophyllin B (HET-B), a brain permeable cyclopeptide from Pseudostellaria heterophylla was determined, and the molecular mechanism underlying its memory improvement effects was investigated. Pseudostellaria heterophylla extract as well as HET-B reversed Aß25-35-induced axonal atrophy and neuronal apoptosis in cultured cortical neurons of mice. HET-B could enhance memory retrieval, modulate splenic T helper cell, and ameliorate neuroinflammation in i.c.v. Aß1-42 injected Alzheimer's disease (AD) mice. To explore the mechanism of action, network pharmacology was performed to predict protein targets and pathways of HET-B against AD. Five key targets were identified related to the effect of HET-B in AD intervention, and were clarified involved in axonal regeneration. We revealed for the first time that HET-B promoted memory retrieval through axonal regeneration and anti-neuroinflammation. This study provides a basis to research on HET-B as nutritional supplements for brain healthy.


Assuntos
Caryophyllaceae , Memória , Neuritos , Peptídeos Cíclicos , Animais , Caryophyllaceae/química , Caryophyllaceae/metabolismo , Imunomodulação/efeitos dos fármacos , Memória/efeitos dos fármacos , Camundongos , Peptídeos Cíclicos/farmacologia , Extratos Vegetais/metabolismo , Extratos Vegetais/farmacologia , Regeneração/efeitos dos fármacos
20.
ACS Appl Mater Interfaces ; 13(19): 22845-22854, 2021 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-33970602

RESUMO

As the global water shortage becomes increasingly serious, it is highly imperative to develop efficient, renewable, and large-scale water purification devices. Herein, an efficient solar-driven water purification device of wood coated with Fe2O3 nanoparticle-decorated carbon nanotubes (Fe2O3/CNT) is fabricated in only a few seconds by one-step combustion of ferric acetylacetonate in an ambient environment. The thin layer of the Fe2O3/CNT hybrid coated on the upper surface of the wood serves as a solar-light absorber for converting solar energy to thermal energy, while the thermally insulating wood layer with vertically aligned channels endows the device with rapid water upward transport and localizes the generated heat inside the Fe2O3/CNT layer for solar-driven water evaporation. As a result, the wood/Fe2O3/CNT device achieves a high water steam generation capability of 1.42 kg m-2 h-1 along with an excellent evaporation efficiency of 87.2% under 1 sun irradiation, higher than most of the wood-based solar-driven water evaporation device reported. This device is also efficient in the purification of seawaters and wastewaters. This work demonstrates a rapid and facile methodology for large-scale fabrication of wood/Fe2O3/CNT devices for efficient solar-driven water purification.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA