ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Xueru Wang,Waseem Ali,Kanglei Zhang,Yonggang Ma,Hui Zou,Xishuai Tong,Jiaqiao Zhu,Ruilong Song,Hongyan Zhao,Zongping Liu,Wenxuan Dong
Cadmium (Cd) has adverse effects on organisms. Serine is an essential nutritional factor and its nutritional value is extremely high for body. To explore the effects of serine on spleen toxicity induced by Cd in mice, cadmium chloride (CdCl 2 , 50 mg/L) and serine (50 g/L) were individually administered or co-administrated in drinking water of mice for 18 weeks. Results demonstrated that Cd exposure induced splenic toxicity and serine against the toxicity damage caused by Cd in mice. Under Cd stress, trace element homeostasis was disturbed, the mice's body weight and spleen index were increased, and splenic morphology and ultrastructure were altered. Furthermore, Cd exposure led to the cell populations disorder, which in turn triggers cell death. Notably, Cd treatment induced oxidative stress and inflammation, increased M1/M2 (iNOS, CD68) and Th1/Th2 (T-bet, CD4) levels, decreased M1/M2 (Arg1) and Th1/Th2 (GATA3) levels, while disrupted the macrophages and lymphocytes homeostasis, which trigged apoptosis and pyroptosis in spleen. In contrast, serine supplementation changed the levels of Cd and other elements, weakened Cd-induced tissue damage and inflammation, enhanced antioxidant capacity, significantly restored cell homeostasis, and effectively inhibited Cd-induced apoptosis and pyroptosis in the spleen. Shortly, the results verified that serine had an ameliorating toxicity effect and restored the M1/M2 and Th1/Th2 balance, restrained apoptosis and pyroptosis induced by Cd.
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Nanomedicine-Nanotechnology Biology and Medicine
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2024
·
IF 4.2
Hongying Zhao,Jiaxin Song,Tian Wang,Xiaodan Fan
Parkinson's disease (PD) is a neurodegenerative disorder and identifying disease-causing pathways and drugs that target them has remained challenging. Herein, selenium nanoparticles decorated with polysaccharides from Sargassum fusiforme (SFPS-SeNPs) were investigated on 6-OHDA-induced neurotoxicity in PC12 cells and rats. 6-OHDA can significantly increase neurotoxicity, oxidative stress and decrease the activity of superoxide dismutase (SOD) and glutathione peroxidase (GPx) both in vitro and vivo. In vitro, treatment with SFPS-SeNPs can significantly decrease 6-OHDA cytotoxicity, reactive oxygen species (ROS) production or malondialdehyde (MDA) levels, and cell apoptosis, significantly increased the activity of SOD and GPx. In vivo, 6-OHDA exposure could also decrease the expression of Nrf2 and OH-1, while treatment with SFPS-SeNPs (1 mg Se/kg) increased. SFPS-SeNPs can protect neurons from 6-OHDA-induced neurotoxicity by regulating apoptosis and Nrf2/ARE pathway. The present study demonstrated that SFPS-SeNPs is a good candidate for developing a new drug against neurodegenerative diseases such as PD.
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Food Bioscience
·
2025
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IF 5.9
Ce Shi,Li Jia,Jinlong Xu,Na Guo,Haiying Cui,Tariq Aziz,Abdulhakeem S. Alamri,Walaa F. Alsanie,Majid Alhomrani,Changzhu Li,Lin Lin
Food contamination caused by Listeria monocytogenes has been a major concern worldwide, and postbiotics derived from lactic acid bacteria are promising in controlling foodborne pathogens, while the antibacterial effects and mechanisms are still largely unclear. This study aimed to investigate the anti - L. monocytogenes activity and mechanisms of the postbiotics derived from Ligilactobacillus salivarius LSA-6 (Postbio-LSA-6), and its potential application in Inner Mongolian cheese preservation. Results showed Postbio-LSA-6 exhibited efficient anti - L. monocytogenes activity, the minimal inhibitory concentration (MIC) was 4 mg/mL. Postbio-LSA-6 at 2MIC could significantly disrupt the bacterial membrane integrity, the membrane-damaged cells percentage increased to 49.6 %, leading to the intercellular materials leakage and cell death. Besides, Postbio-LSA-6 at 2MIC could induce the oxidative stress in bacterial cells, the membrane-fluorescence cells percentage increased to 46 %, resulting in lipid peroxidation. Untargeted metabolomics analysis showed organic acids and fatty acids such as erythronic acid, citric acid, 2-hydroxybutyric acid, and oleic acid were identified as the main differentially expressed metabolites in Postbio-LSA-6. Furthermore, Postbio-LSA-6 could effectively maintain the moisture content and pH stability, reduce the color and texture alterations, and extend the shelf life of cheese samples by suppressing microbial proliferation and lipid oxidation. These results offered new insights on the antibacterial activities of postbiotics against foodborne pathogens, and provided a low-cost, label-friendly biopreservation strategy for local dairy products preservation.
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Environmental Chemistry and Ecotoxicology
·
2025
·
IF 8.2
Xin Wan,Geyu Liang,Dayong Wang
The 6-PPD quinone (6-PPDQ) is derived from 6-PPD, an antioxidant added in tires. Citric acid cycle plays a pivotal role in biochemical metabolisms. In Caenorhabditis elegans , we examined effect of 6-PPDQ exposure on citric acid cycle and the role of alteration in acetyl CoA and pyruvate contents during this process. In citric acid cycle, contents of intermediates were reduced by 0.1–10 μg/L 6-PPDQ. Meanwhile, expression of key enzyme genes ( cts-1 , idh-2 , dlst-1 , and dld-1 ) for citric acid cycle was decreased by 0.1–10 μg/L 6-PPDQ. After 6-PPDQ exposure, citric acid content was reduced by cts-1 RNAi, and NADH content was reduced by idh-2 , dlst-1 , and dld-1 RNAi. Exposure to 6-PPDQ (0.1–10 μg/L) further decreased acetyl CoA and pyruvate contents, and inhibited expression of enzyme genes ( dlat-1 and dld-1 ) governing acetyl CoA synthesis and enzyme genes ( pyk-1 and pyk-2 ) governing pyruvate synthesis. After 6-PPDQ exposure, dlat-1 and dld-1 RNAi reduced contents of acetyl CoA, citric acid, and NADH, and pyk-1 and pyk-2 RNAi reduced contents of pyruvate, citric acid, and NADH. In 6-PPDQ exposed nematodes, cts-1 , idh-2 , dlst-1 , dld-1 , dlat-1 , pyk-1 , and pyk-2 RNAi further caused susceptibility to 6-PPDQ toxicity. Our results suggested 6-PPDQ exposure risk in resulting in damage on citric acid cycle, which was linked to its toxicity induction.
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Analytical Methods
·
2021
·Vol. 13
·期 18
·2092-2098
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IF 2.896
Qizhen Lai,Yucheng Liu,Lan Ge,Yeling Yang,Xinghu Ji,Zhike He
Nanosurface energy transfer (NSET)-based sensors have been widely developed using various pairs of nanomaterials including gold nanoparticles (AuNPs) and quantum dots (QDs). However, a low signal to background ratio is one of the most important problems that researchers are continually trying to solve. Herein, we present a 6-mercaptohexanol (MCH) modified MCH/DNA-Au-QD sensor for the detection of nucleic acids and MUC1. Interestingly, an unexpected effect of MCH was found in enhancing the fluorescence recovery ratio, therefore yielding a higher signal to background ratio. Through further investigation, we perceive the enhancement as a result of lowering of the NSET efficiency between free DNA-AuNPs and free DNA-QDs, which arises from the stretching of adsorbed DNA on the surface of AuNPs. The employment of MCH endowed the sensor with a wider linear range from 5 nM to 120 nM and a relatively lower LOD of 1.19 nM in nucleic acid detection, outperforming the original DNA-Au-QD sensor. Furthermore, the application of the sensor can be further extended to MUC1 detection. This study offers a better understanding of the NSET process between QDs and AuNPs and also initiates a new approach for the performance optimization of analogous NSET-based sensors.
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BMC Veterinary Research
·
2022
·Vol. 18
·期 1
·1-9
·
IF 2.792
Chen Zixiu,Zhao Junhong,Yan Yongjing,Zhang Lei,Du Lijie,Liu Xiang,Cao Manxiu,Wang Cangyu,Tang Yue,Li Haihong
Background Eccrine sweat glands (ESGs) and hair follicles (HFs) are the prominent skin appendages regulating human body temperature. C57BL/6 mice and Sprague–Dawley (SD) rats are the most commonly used model animals for studying ESGs and HFs. Previous studies have shown the distribution of ESGs and HFs in volar hindfeet of C57BL/6 mice, but there are few or no reports on the distribution of ESGs and HFs in volar forefeet of C57BL/6 mice and volar feet of SD rats. Here, we investigated the differential distribution and genetic determination of ESGs and HFs in the volar skin of C57BL/6 mice and SD rats through gross observation, iodine-starch sweat test, double staining with Nile Blue A and Oil Red O, hematoxylin and eosin (HE) staining, double immunofluorescence staining of LIM Homeobox 2 (LHX2)/Na + -K + -ATPase α1(NKA) or LHX2/Na + -K + -2Cl － cotransporter 1 (NKCC1), and qRT-PCR detection of ESG-related gene Engrailed 1 ( En1 ) and HF-related gene LHX2 . Results The results showed ESGs but no HFs in the footpads of C57BL/6 mice and SD rats, both ESGs and HFs in the inter-footpads (IFPs) of C57BL/6 mice, and neither ESGs nor HFs in the IFPs of SD rats. The relative quantitative change in En1 was consistent with the differential distribution of ESGs, and the relative quantitative change of LHX2 was consistent with the differential distribution of HFs. Conclusion C57BL/6 mice and SD rats had their own characteristics in the distribution of ESGs and HFs in the volar skin, and researchers should choose mice or rats, and even forefeet or hindfeet as their research object according to different purposes. The study provides a basis for selection of optimal animal models to study development, wound healing and regeneration of skin appendages.
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Frontiers in Pharmacology
·
2020
·
IF 4.225
Tsai Yun,Xia Changbo,Sun Zhongwen
Lung cancer is the most common malignant tumor and is the leading cause of cancer-related deaths worldwide. Extraction of bioactive substances from herbs is considered as an alternative method to traditional treatment. 6-Gingerol is a naturally occurring phenol found in ginger that can be used to treat tumors and suppress inflammation. To determine whether 6-Gingerol can be used as a therapeutic agent for tumors. In this study, tumor-bearing mice were used as an animal model and A549 as a cell model. Western blot was used to detect the expression of autophagy related proteins ubiquitin-specific peptidase 14 (USP14), Beclin1, microtubule-associated protein light chain 3 (LC3) and ferroptosis related proteins nuclear receptor coactivator 4 (NCOA4), ferritin heavy chain 1 (FTH1), transferrin receptor 1 (TfR1), glutathione peroxidase 4 (GPX4), activating transcription factor4 (ATF4) in vivo and in vitro. MTT and EdU were used to detect the viability of A549 cells. H&E and immunofluorescence were used to localize and detect the expression of proteins. The detection of reactive oxygen species was performed using fluorescence probes. It was found that the administration of 6-Gingerol decreased the expression of USP14, greatly increased the number of autophagosomes, reactive oxygen species (ROS) and iron concentration, decreased the survival and proliferation rate of A549 cells, and significantly decreased tumor volume and weight. The results indicate that 6-Gingerol inhibits lung cancer cell growth via suppression of USP14 expression and its downstream regulation of autophagy-dependent ferroptosis, revealing the function and efficacy of 6-Gingerol as a therapeutic compound in A549 and its possible mechanism of action.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jingrong Zhai,Qiaoling Kang,Qiuyue Liu,Dawei Lai,Qingyi Lu,Feng Gao
Three-dimensional (3D) network structure of metal–organic framework (MOF) can accommodate outstanding electrocatalysis performances, but always collapse during the conversion to active materials or applications process. How to maintain the 3D network when producing active species is of great importance for full application of MOF. Herein, a new MOF material, In[Co(CN) 6 ] (In-Co PBA) nanocubes, are firstly synthesized. Through a controlled low-temperature deligandation process, the In-Co PBA nanocubes are transformed to a novel In 2 O 3 @In-Co PBA quasi-MOF nanocubes, which basically retain the 3D porous structure of PBA but with in situ generated In 2 O 3 nanoparticles inside. When used as CO 2 RR electrocatalyst , such a novel cubic composite structure exhibits excellent performances with faradaic efficiency of 85% for formate at a potential of −0.96 V and with current density of 31.5 mA·cm −2 at −1.32 V, surpassing most of the reported indium-based catalysts. The excellent performance can be attributed to the special composite structure, which provides not only active sites by In 2 O 3 nanoparticles to catalyze CO 2 RR, but also the 3D porous framework by quasi-MOF to accelerate gaseous exchange and electrolyte permeation and prevent the electrode choking. This work offers a new strategy for the design of post-transition metal catalysts and the structure design of quasi-MOF.
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ENVIRONMENTAL POLLUTION
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2020
·
IF 6.793
Cui Ma,Shengyong Jia,Pengfei Yuan,Zhengguang He
Composite magnetic oxide at cow dung ash, nano-Fe 3 O 4 @cow dung ash (nano-Fe 3 O 4 @CDA), was used as catalytic material for the degradation of 2, 2′-methylenebis (4-methyl-6-tert-butylphenol) (AO 2246) in real biologically pretreated landfill leachate . The Fe 3 O 4 @CDA composite exhibited catalytic ozonation activity and allowed material separation and magnetic recovery. The effects of several operating parameters including O 3 concentration, catalyst dosage, temperature and scavengers were evaluated in parallel. Over 70% of AO 2246 were removed by the nano-Fe 3 O 4 @CDA/O 3 system under optimum conditions within 120min reaction time. The EPR, GC–MS and free-radical quenching experiments expatiated the mechanism of this degradation process. It was confirmed that the AO 2246 was degraded efficiently in this catalytic micro-ozonation process, Additionally, GC–MS analysis state clearly that the 3,5-bis(1,1-dimethylethyl)phenol, 4-(1,5-dihydroxy-2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-one, ethanone, 1-(1,4-dimethyl-3-cyclohexen-1-yl)-, 5-tert-butyl-6-3, 5-diene-2-one, 2-hydroxyhexanoic acid, 2-propenoic acid 1,1-dimethylethyl ester, butanoic acid, 2-methyl-, methyl ester and propanoic acid, 2, 2-dimethyl- were the dominant oxidation products (OPs) during the degradation of the AO 2246. The EPR results showed that the catalytic ozonation over Fe 3 O 4 @CDA led to produce more hydroxyl radicals , which were in favor of AO 2246 degradation. The toxicity evolution was also performed through a QSAR analysis calculated by the ECOSAR program which further demonstrated the different responses toward the AO 2246 and its OPs.
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ChemSusChem
·
2018
·Vol. 11
·期 14
·2332-2339
·
IF 7.411
Zhong-Yu Xie,Jin Deng,Yao Fu
Graphical Fatty acids slim down : A new method for γ-lactone preparation based on ring contraction has been developed. Starting from macrolides, W(OTf) 6 was used to catalyze ring-opening polymerization then depolymerization to produce the stable five-membered γ-lactones in the ionic liquid [EMIM]OTf. γ-Lactones were also produced when the substrate was extended to terminal hydroxyfatty acids. γ-Lactones are an important class of fine chemical products and are widely used in perfumes, medicines, pesticides, dyes, and other fields. Herein, a new method for γ-lactones preparation based on ring contraction was developed. Starting from macrolides, W(OTf) 6 was used to catalyze the ring-opening polymerization then depolymerization. The depolymerization step was not a common ring-closing process, and the carbon number of the ring was reduced one by one by rearrangement to form the most thermodynamically stable five-membered ring compounds. γ-Caprolactone (180 °C for 10 h) was obtained in a yield of 94 % when [EMIM]OTf was used as the solvent, and the yield of isolated product was up to 85 %. The interaction of various components and the reaction mechanism were studied by FTIR spectroscopy and 1 H NMR spectroscopy, respectively. Furthermore, γ-lactones could be produced when the substrate was extended to terminal hydroxyfatty acids. Unexpectedly, the catalyst was poisoned by 1 equivalent of H 2 O added during the process and thus the yield decreased greatly. The reaction is green and simple, and proceeds in one pot with high atom economy (100 % for macrolides and with water as the only byproduct for terminal hydroxyfatty acid), which provides a promising approach to synthesizing γ-lactones.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Wenqi Xu,Cuicui Duan,Fumin Ma,Dan Li,Xiaolei Li
To convert ginsenosides Rb1, Rb2, Rb3, and Rc into Rd by a single enzyme, a putative β-glycosidase (Pxbgl) from the xylan-degrading bacterium Petroclostridium xylanilyticum was identified and used. The kcat/Km value of Pxbgl for Rb3 was 18.18 ± 0.07 mM–1/s, which was significantly higher than those of Pxbgl for other ginsenosides. Pxbgl converted almost all Rb3 to Rd with a productivity of 5884 μM/h, which was 346-fold higher than that of only β-xylosidase from Thermoascus aurantiacus. The productivity of Rd from the Panax ginseng root and Panax notoginseng leaf was 146 and 995 μM/h, respectively. Mutants N293 K and I447L from site-directed mutagenesis based on bioinformatics analysis showed an increase in specific activity of 29 and 7% toward Rb3, respectively. This is the first report of a β-glycosidase that can simultaneously remove four different glycosyls at the C–20 position of natural PPD-type ginsenosides and produce Rd as the sole product from P. notoginseng leaf extracts with the highest productivity.
研究领域:
生物化学
·
生物技术
·
药理学
·
微生物学
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2015
·
IF 3.512
Ping Yu,Qilong Sun,Jianfeng Li,Zhenjiang Tan,Yongsheng Yan,Chunxiang Li
In the work, we reported an effective method for the preparation of surface molecularly imprinted polymers based on bacillus as substrate material with superparamagnetic property through miniemulsion polymerization. Then, the obtained magnetic surface molecularly imprinted polymers (MMIPs) were evaluated as adsorbents for selective recognition 2,4,6-trichlorophenol (2,4,6-TCP) from aqueous medium. The resulting MMIPs were characterized by several techniques including FT-IR, SEM, TEM, Raman, XRD, VSM and TGA. The results demonstrated rod-shaped MMIPs was covered with imprinted layer, and exhibited chemical stability and good magnetic sensitivity. Batch mode of binding studies were carried out to determine the equilibrium isotherm, kinetics, selectivity adsorption and regeneration of MMIPs toward 2,4,6-TCP. The results indicated that the selective adsorption behaviors of MMIPs were well described by the Langmuir isotherm model and the pseudo-second-order kinetics model. The specific adsorption capacity of MMIPs was 45.16 mg g −1 at 298 K, which was 2.15 times higher than that of magnetic non-imprinted polymers (MNIPs). The selective recognition studies demonstrated the outstanding affinity and selectivity toward 2,4,6-TCP in the presence of competitive phenols . The regeneration study showed excellent adsorption capacity even after five regeneration cycles. In addition, MMIPs were successfully applied to the extraction of 2,4,6-TCP from milk sample.
研究领域:
环境科学
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材料科学
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