Advanced Optical Materials
·
2023
·Vol. 11
·期 6
·2202383
·
IF 9
Ziyang Wang,Xinyuan Zhang,Jianbo Wu,Lishan Liang,Xinyi Niu,Qin Chen,Ruiqing Li,Junhua Luo
Organic–inorganic hybrid MAPbCl 3 perovskite (MA + = CH 3 NH 3 + ) in UV photodetection is drawing interest due to its superior semiconductor properties and UV-matchable optical bandgap. However, MAPbCl 3 -based photodetector targeting high-performance polarized light detection has remained unexplored due to the isotropic structure of MAPbCl 3 . The photovoltaic effect in the heterojunction, which shows an angle dependence on light polarization, provides opportunities to break the restriction of intrinsic structure for realizing polarization-sensitive photodetection. Herein, an effective strategy is reported to realize high-performance polarization-sensitive UV photodetection by constructing a heterojunction with two isotropic materials MAPbCl 3 and Silicon (Si). Emphatically, the photovoltage in MAPbCl 3 /Si heterojunction changes with the angle of polarized light with the maximum (minimum) value of 0.15 V (0.05 V), originating from the built-in electric field. More interestingly, driven by the photovoltage, the device thus exhibits a large polarization ratio ( I max / I min ) of 2.9 at 377 nm under the self-driven mode. Besides, the present device also delivers high-performance photodetection in UV region owing to the superior photoresponse of MAPbCl 3 , including a high detectivity ( D* ) of 2.93 × 10 11 Jones, a superior responsibility of 8 mA W –1 , a substantial switching ratio of 900, and an ultrafast response speed of 40/98 µs at 0 V bias. This work opens a new avenue for high-performance polarization-sensitive photodetection by utilizing angle-dependent photovoltage effect.
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FOOD CHEMISTRY
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2022
·
IF 9.231
Zhiwen Qi,Pujun Xie,Chen Yang,Xingying Xue,Hongxia Chen,Hao Zhou,Hua Yuan,Guliang Yang,Chengzhang Wang
In this study, Toxicodendron vernicifluum fisetin chelated silver nanoparticles (FT-AgNPs) with outstanding antioxidant and antimicrobial activities were constructed via self-assembly. To surprise, 0.6 wt% FT-AgNPs was compatibly dispersed into the 1:1 chitosan/pullulan (CS/PUL, CP) matrix. The hydrogen bonding and electrostatic interaction between FT-AgNPs and CP, slightly increased the CP thermal stability, and greatly enhanced the tensile strength to 61.2 MPa, water vapor permeability below 20 kg/m 2 •d. Furthermore, after treated with the composite hydrocolloid film (FT-AgNPs/CP), the reactive oxygen species level of the treated Aspergillus niger cells was significantly increased, and the membrane permeability was enhanced. It effectively slowed down the decay of litchi fruit induced by microbial infection under the storage at 25 °C (15 d of the 0.6 % FT-AgNPs/CP treatment vs 9 d of the control). In addition, 0.024 μg/kg Ag + residual in lichi pulp verified the qualified safety of the application of the 0.6 % FT-AgNPs/CP.
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Cancers
·
2022
·Vol. 14
·期 23
·5976
·
IF 6.575
Yuanhui Gao,Zhenyu Nie,Hui Cao,Denggao Huang,Mei Chen,Yang Xiang,Xiaolong Yu,Shufang Zhang
Simple SummaryScabertopin is one of the major sesquiterpene lactones fromElephantopus scaberL. Sesquiterpene lactones are thought to have fairly strong anti-cancer efficacy. However, there has not been any research report on the efficacy and mechanism of Scabertopin in the treatment of bladder cancer. The aim of this study is to evaluate the antitumor activity of scabertopin in bladder cancer and its potential molecular mechanism in vitro. In this study, we found that scabertopin can induce necroptosis in bladder cancer cells by promoting the production of mitochondrial reactive oxygen species, and also inhibit the migration and invasion ability of bladder cancer cells. At the same time, we also demonstrated that the half-inhibition rate of scabertopin on various bladder cancer cell lines is much lower than that on human ureteral epithelial immortalized cells. This shows that scabertopin is a safe and effective anti-bladder cancer drug.AbstractBladder cancer remains one of the most common malignant tumors that threatens human health worldwide. It imposes a heavy burden on patients and society due to the high medical costs associated with its easy metastasis and recurrence. Although several treatment options for bladder cancer are available, their clinical efficacy remains unsatisfactory. Therefore, actively exploring new drugs and their mechanisms of action for the clinical treatment of bladder cancer is very important. Scabertopin is one of the major sesquiterpene lactones found inElephantopus scaberL. Sesquiterpene lactones are thought to have fairly strong anti-cancer efficacy. However, the anticancer effect of sesquiterpenoid scabertopin on bladder cancer and its mechanism are still unclear. The aim of this study is to evaluate the antitumor activity of scabertopin in bladder cancer and its potential molecular mechanism in vitro. Our results suggest that scabertopin can induce RIP1/RIP3-dependent necroptosis in bladder cancer cells by promoting the production of mitochondrial reactive oxygen species (ROS), inhibit the expression of MMP-9 by inhibiting the FAK/PI3K/Akt signaling pathway, and ultimately inhibit the migration and invasion ability of bladder cancer cells. At the same time, we also demonstrated that the half-inhibition concentration (IC50) of scabertopin on various bladder cancer cell lines (J82, T24, RT4 and 5637) is much lower than that on human ureteral epithelial immortalized cells (SV-HUC-1). The above observations indicate that scabertopin is a potential therapeutic agent for bladder cancer that acts by inducing necroptosis and inhibiting metastasis.Keywords:scabertopin;bladder cancer;reactive oxygen species;necroptosis;Elephantopus scaberL.
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CHEMOSPHERE
·
2022
·
IF 8.943
Yan Li,Yutan Chu,Hongyu Sun,Qiongli Bao,Yizong Huang
Arsenic (As) is a common environmental pollutant that seriously interferes with the normal growth of organisms. There is an urgent need to take environment-safe and efficient strategies to mitigate As toxicity. Melatonin (MT) is a pleiotropic molecule that regulates plant growth and organ development and alleviates heavy metal stresses. The experiment aims to explore the mechanism of MT in reducing arsenite toxicity by hydroponic rice seedlings. The results showed that MT application reduced the As content in rice roots and shoots by 26.4% and 37.5%, respectively, and mainly decreased As content in the soluble fractions of the rice root cell. MT application also increased the As content of chelated-soluble pectin and alkali-soluble pectin in the cell wall by 14.7% and 74.4%, respectively. It promoted the generation of the functional group of the root cell walls by the FTIR analysis, indicating that MT may promote the fixation of As on the cell wall. Meanwhile, MT contributed to scavenging excess H 2 O 2 , reducing MDA content, and maintaining normal morphology of root cells by stimulating SOD, POD and CAT activities and increasing the level of GSH. The research deepens our understanding of how MT participates in maintaining redox homeostasis in rice cells, reducing As toxicity, and decreasing As concentration in rice seedlings, thereby providing more possibilities for reducing As accumulation in rice.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Shuxin Li,Wenjing Zhang,Dayi Zhang,Wei Xiu,Shengyu Wu,Juanfen Chai,Jincai Ma,Muhammad Yousuf Jat Baloch,Simiao Sun,Yuesuo Yang
The vadose zone is a critical zone for microbial entry into the subsurface environment, and various types of inorganic and organic colloids can affect the migration of pathogenic bacteria. In the study, we explored the migration behavior of Escherichia coli O157:H7 with humic acids (HA), iron oxides (Fe 2 O 3 ) or their mixture, uncovering their migration mechanisms in the vadose zone. The effect of complex colloids on the physiological properties of E. coli O157:H7 was analyzed based on the measured particle size, zeta potential and contact angle. HA colloids significantly promoted the migration of E. coli O157:H7, where Fe 2 O 3 was opposite. The migration mechanism of E. coli O157:H7 with HA and Fe 2 O 3 is obviously different. Multiple colloids dominated by organic colloid will further highlight its promoting effect on E. coli O157:H7 under the guidance of electrostatic repulsion due to the influence of colloidal stability. Multiple colloids dominated by metallic colloid will inhibit the migration of E. coli O157:H7 under the control of capillary force due to the restriction of contact angle. The risk of secondary release of E. coli O157:H7 can be effectively reduced when the ratio of HA/Fe 2 O 3 is ≥ 1. Combining this conclusion with the distribution characteristics of soil in China, an attempt was made to analyse the migration risk of E. coli O157:H7 on a national scale. In China, from north to south, the migration capacity of E. coli O157:H7 gradually decreased, and the risk of secondary release gradually increased. These results provide ideas for the subsequent study of the effect of other factors on the migration of pathogenic bacteria on a national scale and provide risk information about soil colloids for the construction of pathogen risk assessment model under comprehensive conditions in the future.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jing Duan,Tao Lin,Hongyuan Liu,Jing Xu,Huiping Shao
Polyvinylalcohol/chitosan (PVA/CS) is an excellent dual-network hydrogel material, but some significant challenges remain in fabricating composites with specific structures. In this study, 3D gel printing (3DGP) combined with a water-level controlled crosslinker bath was proposed for the rapid in-situ prototyping of PVA/CS/Fe 3 O 4 magnetic hydrogel scaffolds. Specifically, the PVA/CS/Fe 3 O 4 hydrogels were extruded into the crosslinker water to achieve rapid in-situ gelation , improving the printability of hydrogel scaffolds. The effect of the PVA/CS ratio on the rheological and mechanical properties of dual-network magnetic hydrogels was evaluated. The printing parameters were systematically optimized to facilitate the coordination between the crosslinking water bath and printer. The different crosslinking water baths were investigated to improve the printability of PVA/CS/Fe 3 O 4 hydrogels. The results showed that the printability of the sodium hydroxide (NaOH) crosslinker was significantly better than that of sodium tripolyphosphate (TPP). The magnetic hydrogels (PVA: CS= 1: 1) crosslinked by NaOH had better compressive strength , swelling rate, and saturation magnetization of 1.17 MPa, 92.43%, and 22.19 emu/g, respectively. The MC3T3-E1 cell culture results showed that the PVA/CS/Fe 3 O 4 scaffolds promoted cell adhesion and proliferation, and the scaffolds crosslinked by NaOH had superior cytocompatibility. 3DGP combined with a water-level controlled crosslinker bath offers a promising approach to preparing magnetic hydrogel materials.
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Pharmaceutics
·
2023
·Vol. 15
·期 2
·388
·
IF 5.4
Kunfeng Zhang,Jingxin Fu,Xiaorui Liu,Yifei Guo,Meihua Han,Meifeng Liu,Xiangtao Wang
Mitochondria are involved in various stages of cancer cell diffusion and metastasis. Therefore, targeting tumor mitochondria with antineoplastic medicines to cause mitochondria to initiate apoptosis may be an effective strategy for cancer therapy. Here, in order to enhance the anti-tumor efficacy of the antineoplastic agent hydroxycamptothecin (HCPT), the mitochondrial targeting ligand 4-(carboxybutyl) triphenylphosphine bromide (TPP) was attached to HCPT by an ester linkage. The resultant TPP-HCPT (TH) conjugate could self-assemble into nano-aggregates, with a mean particle size of 203.2 nm and a polydispersity index (PDI) value of 0.312. The TH conjugate could also co-assembly with mPEG3000-PLGA5000into nanoparticles (TH-NPs), with a mean diameter of 86.41 nm, a PDI value of 0.256 and a zeta potential of −0.125 mV. In contrast to HCPT injections, TH aggregates displayed enhanced cellular uptake, mitochondria-targetability and cytotoxicity against 4T1 cells, while TH-NPs showed even better improvement than TH aggregates. In the in vivo study, TH aggregates displayed higher anti-tumor efficacy in 4T1 tumor-bearing mice than HCPT injections (tumor inhibition rate, 55.71% vs. 69.17%), and TH-NPs displayed more superior anti-tumor effects (tumor inhibition rate, 80.02%). In conclusion, our research demonstrated that the TPP-HCPT conjugate and its nano-formulations, including TH aggregates and TH-NPs, may be a promising mitochondria-targeting anticancer medicine for cancer therapy. As far as we know, this is the first report in which TPP and HCPT have been conjugated directly for this aim.Keywords:mitochondrial targeting;hydroxycamptothecin;triphenylphosphine;nanoparticles
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xingzhen Zhang,Ying Liu,Feng Zhang,Wangxi Fang,Jian Jin,Yuzhang Zhu
Developing a membrane integrating high separation efficiency and good anti-fouling ability for both oil-in-water and water-in-oil emulsions is meaningful due to the complexity and diversity of actual oily wastewater. Herein, a facile strategy was designed to generate a nanofibrous Janus membrane to achieve multifunctional and self-cleaning properties. Hydrophilic β-FeOOH was anchored on poly(vinylidene fluoride-co- hexa -fluoropropylene) (PVDF-HEP) fibers to achieve hydrophilicity and self-cleaning performance of PVDF-HEP/β-FeOOH layer by in situ mineralization technology. The Janus membrane was then obtained by incorporating PVDF-HEP fibers layer onto the hydrophilic layer through electrospinning technology. PVDF-HEP/β-FeOOH layer owns superhydrophilicity (WCA = 0°) and underwater superoleophobicity (OCA = 159°), which can separate different surfactant-stabilized oil-in-water emulsions with separation efficiency of above 99.8 % when this layer is facing up. Conversely, the PVDF-HEP layer exhibits superhydrophobicity (WCA = 149°), which can separate different surfactant-stabilized water-in-oil emulsions with separation efficiency of above 99 % when this layer is facing up. More importantly, a satisfying water flux recovery rate of 98.2 % is acquired due to the synergistic effect between β-FeOOH photocatalysis and asymmetric wettability of the membrane, endowing the membrane with effective self-cleaning capability and satisfactory stability. This study provides a new strategy for designing multifunctional membrane toward actual complex oily wastewater treatment .
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ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Mingce Tian,Wenjuan Zhou,Weijiang Guan,Chao Lu
Crystallization-induced microscopic stress and its relaxation play a vital role in understanding crystallization behavior and mechanism. However, the real-time measurements for stress and its relaxation seem to be an unachievable task due to difficulties in simultaneous labeling, spatiotemporal discrimination, and continuous quantification. We designed a micron-sized fluorescent probe, whose fluorescence can respond to stress-induced environmental rigidity and whose three-dimensional (3D) flow can respond to stress relaxation. Using the as-prepared fluorescent probe, we established a versatile strategy to realize the real-time 3D imaging of stress and its relaxation in the crystallization process. The rigidity-responsive fluorescence clearly indicated the stress, while the 3D flow movement could quantify the stress relaxation. It is revealed that stress in spherulites increased dramatically as a result of the suppression of stress relaxation in polymer melts. The developed method provides a novel avenue to simultaneously detect stress and its relaxation in various semicrystalline polymers at the single-particle level. This success would achieve the microscopic ways to guide the development of advanced crystallization-dependent materials.
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Microorganisms
·
2022
·Vol. 10
·期 11
·2269
·
IF 4.926
Yan-Lu Wang,Wei-Kang Wang,Qi-Chao Wu,Fan Zhang,Wen-Juan Li,Sheng-Li Li,Wei Wang,Zhi-Jun Cao,Hong-Jian Yang
In plant cell wall, ferulic acid (FA) andp-coumaric acid (pCA) are commonly linked with arabinoxylans and lignin through ester and ether bonds. These linkages were deemed to hinder the access of rumen microbes to cell wall polysaccharides. The attachment of rumen microbes to plant cell wall was believed to have profound effects on the rate and the extent of forage digestion in rumen. The objective of this study was to evaluate the effect of bound phenolic acid content and their composition in corn silages on the nutrient degradability, and the composition of the attached bacteria. Following an in situ rumen degradation method, eight representative corn silages with different FA andpCA contents were placed into nylon bags and incubated in the rumens of three matured lactating Holstein cows for 0, 6, 12, 24, 36, 48, and 72 h, respectively. Corn silage digestibility was assessed by in situ degradation methods. As a result, the effective degradability of dry matter, neutral detergent fibre, and acid detergent fibre were negatively related to the ether-linked FA andpCA, and their ratio in corn silages, suggesting that not only the content and but also the composition of phenolic acids significantly affected the degradation characteristics of corn silages. After 24 h rumen fermentation, Firmicutes, Actinobacteria, and Bacteroidota were observed as the dominant phyla in the bacterial communities attached to the corn silages. After 72 h rumen fermentation, the rumen degradation of ester-linked FA was much greater than that of ester-linkedpCA. The correlation analysis noted thatErysipelotrichaceae_UCG-002,Olsenella,Ruminococcus_gauvreauii_group,Acetitomaculum, andBifidobacteriumwere negatively related to the initial ether-linked FA content whilePrevotellawas positively related to the ether-linked FA content and the ratio ofpCA to FA. In summary, the present results suggested that the content of ether-linked phenolic acids in plant cell walls exhibited a more profound effect on the pattern of microbial colonization than the fibre content.Keywords:corn silage;rumen-attached bacteria;phenolic acids;in situ degradation
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BIOORGANIC CHEMISTRY
·
2022
·
IF 5.307
Yudong Yin,Lixin Sheng,Juzheng Zhang,Liqiong Zhang,Jingjing Liu,Xiaoan Wen,Yanghan Liu,Yang Si,Keguang Cheng
Extensive research effort has been put in pentacyclic triterpenoids due to their numerous biological activities. However, their poor water solubility and low oral bioavailability limit their antitumor effects in vivo . To address these issues, 37 triterpenoid acid derivatives linked to l -phenylalanine or l -proline were designed and synthesized in this study. Structure-activity relationship (SAR) studies found two promising glycyrrhetinic acid (GA) derivatives 11 and 16. Compound 11 was obtained by C3-OH esterification and C30-COOH modification with l -phenylalanine while 16 was obtained by attaching C3-OH with l -phenylalanine. Compounds 11 and 16 exhibit up to 48- and 120-fold improvement respectively compared with the IC 50 values of naturally occurring GA in the cellular assay. Fluorescence microscope and flow cytometric analysis suggested that both compounds 11 and 16 increased the content of ROS and Ca 2+ in cancer cells, decreased mitochondrial membrane potential (JC-1), and activated the regulator caspase-3/8/9 to trigger cell apoptosis. RNA-seq analysis and western blot analysis indicated that compounds 11 and 16 may promote apoptosis by upregulating the functions of pro-apoptotic factors while inhibiting the proteasome activity.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2022
·
IF 5.062
Saige Meng,Shuangqing Wang,Ming Guan Piao
The synergistic gastroretentive drug delivery systems are capable of delivering drugs with a narrow absorption window. The purpose of this study is to prepare furosemide hollow-bioadhesive microspheres to improve bioavailability. The emulsion solvent volatilization method was adopted, through Box-Behnken design, with polymer ratio (X 1 ), dosage (X 2 ), organic solvent volume (X 3 ) and PVA concentration (X 4 ) as independent variables, and drug loading (Y 1 ), encapsulation rate (Y 2 ), yield rate (Y 3 ) and 8 h floating rate (Y 4 ) were response variables. The interaction effects of the independent and response variables were explored. The optimized hollow-bioadhesive microspheres showed the in vitro floating rate of 93.33 ± 5.24% for 8 h, the in vitro retention rate of 90.67 ± 3.21%, and the sustained drug release of 93.79 ± 4.90% for 12 h. Compared with the hollow microspheres, the hollow-bioadhesive microspheres significantly increase the retention time in the stomach. The results of Differential Scanning Calorimetry , Fourier Transform InfraRed, and X-ray diffraction showed that furosemide had good biocompatibility with excipients. Compared with commercial tablets, the relative bioavailability of hollow-bioadhesive microspheres was increased by 163.84%, and the long-term therapeutic concentration was maintained. The safety evaluation proved the oral safety of microspheres. In conclusion, the safe and economical furosemide hollow-bioadhesive microsphere is a valuable preparation for development, which can improve clinical application.
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