COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yina Zhuge,Haipei Ge,Fujuan Liu
The white-browed penguin can survive in extreme environments due to its unique feather structure. The feather shafts of penguins are porous, separated by the membrane-pore-like structure made of keratin fiber membranes. The feather branches are densely arranged around the feather shafts. This unique structure provides inspiration for researchers. In this work, we developed a simple method to construct polyimide/polysulfone amide (PI/PSA) membrane-pore-like structure nanofibers resembling penguin feather shafts and studied the effects of different low-boiling point solvents (tetrahydrofuran (THF), ethyl acetate (EA), and acetone (AC)) on the morphology, tensile properties, and thermal insulation properties of PI/PSA membrane-pore-like structure nanofibers. Comprehensive characterization was also performed using scanning electron microscope, total reflection infrared spectrometer, X-ray diffractometer, universal testing machine, thermal conductivity meter, pore size analyzer, thermal gravimetric analyzer, infrared thermal imaging instruments, and thermocouple testing instruments. The results showed that when the mass ratio of THF to N, N-dimethylacetamide (DMAC) was 20/80, the prepared PI/PSA membrane-pore-like structure nanofibers exhibited excellent thermal insulation properties, with a low thermal conductivity of 0.0436 W·m −1 ·K −1 , a breaking strength of 7.72 ± 2.64 MPa, and a breaking elongation of 8.19 ± 4.07 %. The biomimetic membrane-pore-like structure with excellent thermal insulation properties is expected to be applied in various fields, such as heat-protective clothing and architectural coatings in harsh environments.
研究领域:
材料科学
·
仿生学
·
热物理学
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产品关联
DOI
高影响因子
ENERGY
·
2014
·
IF 4.159
Qing-li Zhu,Rong Shao,Rui Dong,Zhi Yun
This study outlined an integrated approach for obtaining several products, such as biodiesel , gossypol, sterols, raffinose, and nontoxic cottonseed meal from cottonseed via modified two-phase extraction (TPE), supercritical methanol transesterification and other technologies. The modified TPE could not only simplify the steps of separating substances, but also improve the quality of cottonseed oil and cottonseed meal. The suitable conditions of modified TPE were as follows: the petroleum ether/methanol volume rate of 1:3, the extraction temperature of 40 °C, and the extraction time of 20 min. The supercritical methanol transesterification had a favorable yield of biodiesel with shorter time. The conversion of cottonseed oil was up to 97.5% with the temperature of 270 °C, the molar ratio of methanol to oil of 40, and a reaction time of 40 min at 10 MPa. Meanwhile, with the suitable conditions, the purity of the obtained gossypol, sterols and raffinose could be got to 92.1%, 89.8% and 94.2%, respectively. This integrated biorefinery could be useful for comprehensive development and utilization of cottonseed with fewer steps and lower cost.
研究领域:
生物工程
·
化学工程
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-18
·
IF 16.6
Zhong Jing,He Xiaofang,Gao Xinxin,Liu Qiaohong,Zhao Yu,Hong Ying,Zhu Weize,Yan Juan,Li Yifan,Li Yan,Zheng Ningning,Bao Yiyang,Wang Hao,Ma Junli,Huang Wenjin,Liu Zekun,Lyu Yuanzhi,Ke Xisong,Jia Wei,Xie Cen,Hu Yiyang,Sheng Lili,Li Houkai
Nonalcoholic fatty liver disease (NAFLD) is usually characterized with disrupted bile acid (BA) homeostasis. However, the exact role of certain BA in NAFLD is poorly understood. Here we show levels of serum hyodeoxycholic acid (HDCA) decrease in both NAFLD patients and mice, as well as in liver and intestinal contents of NAFLD mice compared to their healthy counterparts. Serum HDCA is also inversely correlated with NAFLD severity. Dietary HDCA supplementation ameliorates diet-induced NAFLD in male wild type mice by activating fatty acid oxidation in hepatic peroxisome proliferator-activated receptor α (PPARα)-dependent way because the anti-NAFLD effect of HDCA is abolished in hepatocyte-specific Pparα knockout mice. Mechanistically, HDCA facilitates nuclear localization of PPARα by directly interacting with RAN protein. This interaction disrupts the formation of RAN/CRM1/PPARα nucleus-cytoplasm shuttling heterotrimer. Our results demonstrate the therapeutic potential of HDCA for NAFLD and provide new insights of BAs on regulating fatty acid metabolism.
研究领域:
肝病学
·
分子生物学
·
代谢
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Xiuzhen Qiu,Yangyang Li,Yulin Wang,Huishi Guo,Libo Nie
α-Amanitin is the most toxic amanita identified in mushrooms, making early identification crucial for improving the human survival rates and preventing lethal poisoning cases. In this study, a novel molecular imprinting sensor based on quartz crystal microbalance (QCM) was developed for the determination of amatoxins in biological samples. To this end, allyl mercaptan was first used to attach polymerizable double bonds on the surface of QCM gold electrode. A molecularly imprinted polymer (MIP) coating was then deposited on the gold electrode surface using synthesized moieties of α-amanitin as templates and both 4-vinylpyridine and α-methacrylic acid as bi-functional monomers. The adsorption performances of the as-obtained quartz crystal microbalance molecular imprinting (QCM-MIP) sensor towards α-amatoxins were evaluated by a series of adsorption experiments. The as-prepared sensor displayed a good linear response towards α-amanitin from 1.0 ng/L to 50.0 ng/L. The sensor showed also low detection limit (0.052 pg/L), short response time (20 min), high adsorption capacity (138 μg/cm 2 ), good reproducibility, and relevant stability. Furthermore, the as-obtained QCM-MIP sensor was successful in selective recognition of α-amanitin in biological samples with recoveries ranging from 80.6% to 103.8%. Overall, the proposed QCM-MIP looks useful for the construction of future selective and quick detection of α-amanitin in biological samples.
研究领域:
分析化学
·
毒理学
·
生物传感技术
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产品关联
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 7
·期 9
·3662-3674
·
IF 5.251
Yiming Liu,Ke Li,Youshen Wu,Jingwen Ma,Peng Tang,Yongchun Liu,Daocheng Wu
To improve the tumor synergistic therapeutic effects of carrier-free dual-drug delivery systems and realize ultralow dose administration, we developed a tumor targeting and high-efficiency synergistic chemotherapy system (HA-Gn@DPGn NPs) based on polyvinyl alcohol (PVA) reinforced gossypolone (Gn) and doxorubicin (DOX) π–π stacking nanoparticles (DPGn NPs), in which PVA filled the gaps between Gn and DOX and bridged Gn and DOX tightly. Hyaluronic acid modifier hyaluronic acid-gossypolone (HA-Gn) was covered on the surface of DPGn NPs to form HA-Gn@DPGn NPs that procured active targeting properties. This system presented a spherical shape with a uniform hydrodynamic size of 87 ± 6.8 nm, a high drug loading of 80.31%, and high stability. FTIR and UV spectra demonstrated that HA-Gn was covered on the surface of the system and showed significant π–π stacking properties. A considerably low combination index of Gn and DOX (0.1862) was determined at an ultra-low dose of DOX under a Gn : DOX ratio of 50 : 1. HA-Gn@DPGn NPs also demonstrated excellent tumor synergistic therapeutic efficacy (TIR > 87%) at an ultralow dose of DOX and Gn. This system demonstrates high tumor comprehensive synergistic therapeutic efficacy at an ultralow drug dose with multiple favorable therapeutic characteristics, including negligible side effects, tumor targeting ability and thermal-responsive drug release, and thus has considerable potential for tumor synergistic therapy.
研究领域:
药理学
·
纳米技术
·
肿瘤学
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Tingting Fan,Xiangwei He,Hengchao E,Yanmei Zhang,Xiaobei Li,Xujiao Li,Xianli Yang,Changyan Zhou,Zhiyong Zhao,Xiaoyan Zhao
Gyromitrin is the main toxic metabolite produced from the false morel such as Gyromitra esculenta , which has a long history of causing food poisoning. However, how to identify the gyromitrin-induced poisoning is difficult because the biomarker of gyromitrin in vivo is still unclear. In this study, a novel isotope-coded method combined with the derivatization strategy was first developed for the accurate quantification of gyromitrin in urine and plasma by ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The major parameters affecting the derivatization efficiency were systematically investigated, and the p-tolualdehyde-d 4 was employed to form the isotope internal standard. The developed method was fully validated with the limit of detection (LOD) of 1 µg/L in urine and plasma. The recoveries were between 88 % and 111 % with the inter-day precision less than 13 %. An exposure study in 12 rats was conducted to determine urinary excretion of gyromitrin and its metabolite monomethylhydrazine (MMH). The mean urinary excretion rates of gyromitrin were 3.45 % (low dose) and 4.93 % (high dose), while the excretion rate of MMH were 0.20 % and 0.36 %. After exposure for 48 h, no gyromitrin and MMH was detected in rat urine. The results suggested that gyromitrin is a valuable biomarker for identification of gyromitrin-induced mushroom poisoning.
研究领域:
毒理学
·
分析化学
·
食品安全
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE
·
2018
·Vol. 41
·期 6
·3195-3202
·
IF 2.784
Dan Wang,Li Bie,Yanbin Su,Haoran Xu,Fengrong Zhang,Yanwen Su,Bo Zhang
Lithocholic acid (LCA) is known to kill glioma cells while sparing normal neuronal cells. However, the anti-glioma mechanism of LCA is unclear at present. Although malondialdehyde (MDA) is not specific to detect tumors, biologically active α,β-unsaturated aldehydes can be used to detect the outcome of gliomas, especially the mitochondria, as a research tool. The purpose of this research was to determine the optimum conditions for a lipid peroxidation model, according to changes in the aldehydes formed from the reaction between 2-thiobarbituric acid and biologically active α,β-unsaturated aldehydes. Experimental methods and procedures were successfully established for a model of lipid peroxidation induced by H2O2 in glioma mitochondria for glioma treatment and optimum conditions for LCA treatment were determined. The optimal conditions for the model were a glioma mitochondrial concentration of 1.5 mg/ml, H2O2 concentration of 0.3 mg/ml, duration of action of 30 min, and addition of 4.0 ml of 46 mM thiobarbituric acid. The effect of LCA, as determined by changes in the UV peaks at 450, 495, and 532 nm, was optimal at a concentration of 100 µM, a duration of action of 15 min, and in an acidic microenvironment. The study concluded that a suitable concentration of LCA has anti-glioma effects as determined by the effect on changes in the UV peaks at 450, 495 and 532 nm and the mitochondrial model developed should be conducive to further in-depth research.
研究领域:
癌症研究
·
神经科学
·
药理学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Antibiotics-Basel
·
2022
·Vol. 12
·期 1
·71
·
IF 5.222
Kaiyu Cui,Weifeng Yang,Shuang Liu,Dongying Li,Lu Li,Xing Ren,Yanan Sun,Gaiying He,Shuhua Ma,Jidan Zhang,Qing Wei,Yi Wang
Methicillin-resistantStaphylococcus aureus(MRSA) has posed a severe global health threat. In this study, we screened an antibiotic and non-antibiotic combination that provides a viable strategy to solve this issue by broadening the antimicrobial spectrum. We found that chenodeoxycholic acid (CDCA) could synergistically act with carbapenem antibiotics to eradicate MRSA-related infections. This synergy specifically targets MRSA and was also validated using 25 clinical MRSA strains using time–kill analysis. We speculated that the underlying mechanism was associated with the interaction of penicillin-binding proteins (PBPs). As a result, the synergistic efficiency of CDCA with carbapenems targeting PBP1 was better than that of β-lactams targeting PBPs. Moreover, we showed that CDCA did not affect the expression level of PBPs, but sensitized MRSA to carbapenems by disrupting the cell membrane. In our study, we have revealed a novel synergistic combination of antibiotics and non-antibiotics to combat potential bacterial infections.Keywords:chenodeoxycholic acid;MRSA;carbapenems;penicillin-binding proteins;synergistic inhibition
研究领域:
微生物学
·
药理学
·
传染病学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 17
·8678
·
IF 4.9
Yamin Zhang,Jiajia Lin,Xiaomei Xu,Xuehua Lu,Lisha Li,Yuezhen Yang,Wenjin Lin
This study aimed to compare the therapeutic effects of fresh (CMF) and dried (CMD) Centipeda minima against allergic rhinitis (AR), elucidate their underlying molecular mechanisms, and identify the bioactive compounds responsible for their immunomodulatory actions. An ovalbumin-induced AR mouse model was treated with CMF or CMD extracts, followed by evaluation of nasal symptoms, serum biomarkers (IgE, histamine, cytokines), and nasal mucosa histopathology. Transcriptomics and widely targeted metabolomics were integrated with network pharmacology to identify differentially expressed genes and bioactive components, which were further validated in RAW264.7 and RBL-2H3 cells. CMF and CMD exhibited distinct anti-AR mechanisms: CMF predominantly suppressed Th2 responses (reducing IgE, IL-6, and histamine while elevating IL-10), whereas CMD enhanced Th1 activity (increasing IFN-γ). Metabolomic analysis revealed CMF was rich in amino acids while CMD contained higher flavonoids, with neocnidilide and 6-gingerol identified as key bioactive compounds that modulated TNF-α, IL-6, and IL-10 via NF-κB and JAK-STAT pathways. These findings demonstrate that CMF and CMD exert complementary anti-inflammatory effects through Th2 inhibition and Th1 activation, respectively, providing a molecular basis for the traditional use of Centipeda minima and highlighting its bioactive compounds as potential therapeutics for inflammatory diseases.
研究领域:
药理学
·
免疫学
·
民族药理学
·
分子生物学
·
植物学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLoS One
·
2025
·Vol. 20
·期 7
·e0328000
·
IF 2.6
Shuaijun Peng,Ruiqin Sun,Hui Liu,Baoying Wang,Yucheng Li
Gastric mucosal injury can lead to significant gastrointestinal disorders, including inflammation, ulcers, and intestinal metaplasia in severe cases. Although bile acids are known contributors to mucosal damage due to their acidity, the role of chenodeoxycholic acid (CDCA), a primary bile acid, in gastric mucosal injury remains unclear. This study investigates the role of CDCA in inducing gastric mucosal injury and its underlying mechanisms, with a focus on apoptosis and FXR activation, to identify potential therapeutic targets. Mice were administered varying doses of CDCA to evaluate changes in body weight, food intake, and gastric mucosal pathology using hematoxylin-eosin (HE) and alcian blue-periodic acid-Schiff (AB-PAS) staining. Expression levels of apoptosis-related genes (BAX, BCL-2) and the intestinal metaplasia marker gene (CDX2) were analyzed via RT-PCR and Western blotting (WB). GES-1 cells were treated with different CDCA concentrations to assess cell viability via the CCK-8 assay. Apoptosis rates were measured using flow cytometry, and FXR inhibitors were applied to examine their impact on CDCA-induced effects. CDCA administration in mice resulted in weight loss, reduced food and water intake, gastric epithelial shedding, and intestinal metaplasia. CDCA exposure upregulated Bax and CDX2 expression, while reducing BCL-2 levels. In vitro, CDCA inhibited GES-1 cell viability and increased apoptosis rates, effects that were reversed by FXR inhibition. CDCA induces gastric mucosal injury through apoptosis and FXR activation. These findings provide insights into the mechanisms of bile acid-mediated mucosal damage and highlight FXR as a potential therapeutic target for gastric mucosal disorders.
研究领域:
胃肠病学
·
细胞生物学
·
分子生物学
·
药理学
·
病理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 29
·期 1
·1805582
·
IF 13.325
Ya Wang,Youshen Wu,Ke Li,Shihong Shen,Zeying Liu,Daocheng Wu
Long blood circulation in vivo remains a challenge to dual-drug-loaded nanocarriers for synergistic chemotherapy. Herein, a novel strategy to prepare lollipop-like dual-drug-loaded nanoparticles (DOX–PDA–gossypol NPs) is developed based on the self-assembly of gossypol, doxorubicin (DOX), and polydopamine (PDA) via π–π stacking. Dopamine polymerizes to PDA and fills the gaps between the gossypol and DOX molecules to form the super compact long-circulating nanoparticles. The DOX–PDA–gossypol NPs show a suitable particle size of 59.6 ± 9.6 nm, high drug loading of 91%, superb stability, high maximum-tolerated dose (MTD) of over 60 mg kg -1 , and negligible toxicity. These NPs also exhibit pH-dependent drug release and low combination index (0.23). Notably, they show dramatically ultralong blood circulation (>192 h) with elimination half times 458-fold and 258-fold longer than that of free DOX and free gossypol, respectively. These values are markedly higher than most of the reported results. Therefore, the DOX–PDA–gossypol NPs have a high tumor accumulation of 12% remaining on the 8th day postinjection. This characteristic contributes to the excellent tumor comprehensive synergistic therapeutic efficacy (TIR > 90%) with low administration dosage and is benefitted for widening the drug therapeutic window. Thus, the proposed strategy has remarkable potential for tumor synergistic therapy.
研究领域:
药学
·
纳米技术
·
癌症研究
·
药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
·
2022
·
IF 5.011
Xijie Yu,Xiaoxiao Xu,Wei Dong,Chang Yang,Yao Luo,Ying He,Chenxi Jiang,Yanru Wu,Jiawei Wang
Endoplasmic reticulum (ER) stress is an evolutionarily conserved cellular stress response related to multiple diseases, including temporomandibular joint (TMJ) cartilage-related diseases. Recent studies have indicated that DDIT3/CHOP (a downstream transcription factor of ER stress) is an important effector in mediating ER stress to inhibit chondrogenesis . However, the underlying mechanism by which DDIT3 regulates chondrogenesis remains unclear. In this study, tunicamycin (an ER stress agonist)-induced ER stress inhibited chondrocyte differentiation and matrix synthesis in vitro and led to an osteoarthritis-like phenotype in mouse TMJ cartilage. Meanwhile, DDIT3 expression in chondrocytes was robustly upregulated. Loss-of-function experiments validated the inhibiting effect of DDIT3 on chondrocyte differentiation and matrix synthesis. Mechanistically, the inhibiting effect was attributed to the direct and indirect regulatory effect of DDIT3 on SIRT1 (sirtuin1, silent mating type information regulation protein type 1, a member of NAD+ dependent class III histone deacetylases). On one hand, DDIT3 directly promoted the transcription of SIRT1. On the other hand, DDIT3 indirectly increased the expression of SIRT1 by promoting AMPKα phosphorylation and activation. Furthermore, activation of AMPKα or SIRT1 with the corresponding agonist AICAR or resveratrol in the DDIT3-knockdown cells partially restored the inhibiting effect of DDIT3 on chondrocyte differentiation and matrix synthesis. Collectively, these novel findings indicate that DDIT3 regulates the inhibitory effect of ER stress on chondrocyte differentiation and matrix synthesis partially via the AMPKα-SIRT1 pathway. A thorough understanding of ER stress in regulating chondrocyte homeostasis and its role in the onset of osteoarthritis may be promising to develop therapeutic targets and prevent condyle cartilage destruction.
研究领域:
细胞生物学
·
分子生物学
·
骨科
·
病理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）