Science China-Chemistry
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2023
·
IF 9.6
Zhang Min,Li Zijun,Zhang Mengyang,Heng Hang,Xu Shiying,Wang Zhaoyin,Dai Zhihui
The content of biothiols in cells is highly associated with the occurrence and development of several diseases. However, due to their active chemical properties, thiol-contained molecules are normally volatile during the detection process, rendering precise analysis of intracellular biothiols challenging. In this study, 5,5′-dithiobis-(2-nitrobenzoic acid) (DTNB) is covalently modified on the surface of gold nanorods (AuNRs), constructing sensing substrates for in situ Raman imaging analysis of biothiols in cells. AuNRs are able to serve as ideal surface-enhanced Raman scattering substrates, and thus Raman signals of DTNB are greatly amplified by AuNRs. Meanwhile, the disulfide bond of DTNB can be broken by thiols, thereby releasing part of DTNB from the surface of AuNRs. As a result, three kinds of main biothiols are sensitively quantified with DTNB-modified AuNRs according to the variation of Raman signals, and DTNB-modified AuNRs exhibit far better analytical performance than a commercial probe. In addition, the sensing substrates can be readily delivered to cytoplasm with the transmembrane of AuNRs, and are capable of responding to biothiols in cells. Notably, the Raman approach is established by the breaking of chemical bonds rather than the aggregation of substrates, which is more inclined to analyze intracellular biothiols with a desirable spatial resolution. Therefore, fluctuation of biothiols in glioma cells is evidently observed via Raman imaging. Overall, this work provides an alternative strategy for designing Raman sensors to visualize active molecules in cells.
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高影响因子
ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Zhangmin Wang,Ze Zhang,Hongzhi Pan,Dong Chang
Exosomes derived from lung cancer typically contain the genetic information of the donor cells. Therefore, exosomes contribute to early diagnosis, treatment effectiveness evaluation, and prognosis assessment of cancer. Based on the biotin-streptavidin system and MXenes nanomaterial , a dual-effect amplification method had been developed to construct an ultrasensitive colorimetric aptasensor for detecting exosomes. MXenes can enhance the loading of aptamer and biotin as the high specific surface area. Biotin-streptavidin system can increase the amount of horseradish peroxidase-linked (HRP-linked) streptavidin , considerably boosting the color signal of the aptasensor. The proposed colorimetric aptasensor exhibited excellent sensitivity, with a detection limit of 42 particles μL −1 and a linear range of 10 2 to 10 7 particles μL −1 . The constructed aptasensor showed satisfactory reproducibility, stability, and selectivity , confirming the promising application of exosomes in clinical cancer detection.
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IMMUNOPHARMACOLOGY AND IMMUNOTOXICOLOGY
·
2023
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IF 3.3
Xiulian Zhang,Xueliang Li,Wei Ma,Fangying Liu,Pinxian Huang,Lei Wei,Li Li,Yechang Qian
Background Chronic obstructive pulmonary disease (COPD) has a high fatality rate and poses a great threat to human health. Astragaloside IV (AS-IV) is proven to attenuate cigarette smoke (CS)-induced pulmonary inflammation, based on which this research focuses on the mechanism of AS-IV in COPD.Methods To evaluate the effects of AS-IV, CD4+ T cells received different concentrations of AS-IV. CD4+ T cell viability, T helper 17 (Th17)/regulatory T (Treg) markers and CXCR4 expressions in CD4+ T cells or spleen/lung tissues were detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide assay, quantitative real-time polymerase chain reaction and Western blot. The proportions of Treg and Th17 cells were assessed by flow cytometry. Enzyme-linked immune sorbent assay was employed to determine cytokine contents in serum and lung tissues.Results AS-IV with concentration exceeding 40 µM inhibited CD4+ T cell viability. In vitro, AS-IV suppressed the expressions of CXCR4, retinoid-related orphan receptor γt (RORγt), and interleukin (IL)-17A as well as Th17 cells but promoted the expressions of forkhead box p3 (Foxp3) and IL-10 as well as Treg cells, while CXCR4 overexpression reversed the effects of AS-IV. In vivo, AS-IV alleviated COPD, and CS-induced Th17/Treg imbalance in mice and reduced CS-induced down-regulation of IL-10 in serum and lung tissues and Foxp3 and up-regulation of IL-1β, tumor necrosis factor alpha (TNF-α), IL-6, and IL-17A in serum and lung tissues and RORγt. AS-IV mitigated CS-induced CXCR4 up-regulation. Above effects of AS-IV on mice were offset by CXCR4 overexpression.Conclusions AS-IV restores Th17/Treg balance via impeding CXCR4 to ameliorate COPD.
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高影响因子
CHEMOSPHERE
·
2023
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IF 8.8
Jiaming Zhang,Chao Yu,Longqian Xu,Zhenyu Zhao,Deli Wu
Electro-enhanced metal-free boron/peroxymonosulfate (B/PMS) system has demonstrated potential for efficient metal-organic complexes degradation in an eco-friendly way. However, the efficiency and durability of the boron activator are limited by associated passivation effect. Additionally, the lack of suitable methods utilizing in-situ recovery of metal ions liberated from decomplexation causes huge resource waste. In this study, B/PMS coupled with a customized flow electrolysis membrane (FEM) system is proposed to address above challenges with Ni-EDTA used as the model contaminant. Electrolysis is confirmed to remarkably promote the activation performance of boron towards PMS to efficiently generate • OH which dominated Ni-EDTA decomplexation in the anode chamber. It is revealed that the acidification near the anode electrode improves the stability of boron by inhibiting passivation layer growth. Under optimal parameters (10 mM PMS, 0.5 g/L boron, initial pH = 2.3, current density = 68.87 A/m 2 ), 91.8% of Ni-EDTA could be degraded in 40 min, with a k obs of 6.25 × 10 −2 min −1 . As the decomplexation proceeds, nickel ions are recovered in the cathode chamber with little interference from the concentration of co-existing cations. These findings provide a promising and sustainable strategy for simultaneous metal-organic complexes removal and metal resources recovery.
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高影响因子
FOOD CONTROL
·
2023
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IF 6
Chenfei Han,Yu Xiao,Zhenjiang Liu,Daolin Du,Ming Li
To improve the performance of aptasensor, the coupling of novel material and strategy had been the hottest research with the promising prospects. In this study, a cascade amplifying aptasensor (CA-aptasensor), which had coupled the DNase I-assisted cyclic enzyme digestion and AgNPs@gel-enhanced fluorescence, had reflected the desired performance for positively correlated detecting OTA . For this purpose, the GO@PVP was used to adsorb and quench the free FAM-Apt, while the complex of OTA and FAM-Apt was digested by the DNase I. The released OTA allowed the free FAM-Apt to separate from the GO@PVP cyclically, thus the OTA level was amplified preliminarily. The AgNPs@gel could combine with the released FAM to form the metal enhanced fluorescence (MEF) effect, resulting in the cascade signal amplification. The OTA was detected at pg mL −1 level with an ultrasensitive LOD of 3.33 pg mL −1 and IC 50 of 13.6 pg mL −1 , which improved 90-fold and 728-fold than that of ELASA for same aptamer. The CA-aptasensor indicated high specificity, reliability and practicability. Meanwhile, the CA-aptasensor exhibited more highlights, including the efficient homogeneous system, low background signal and standardized aptamer recognizer. This study might provide a new approach for improving the performance of aptasensor, which could also guide the signaling cascade and positively correlated detection for other risk factors.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Di Tan,Fandong Meng,Yunxia Ni,Wen Sun,Quan Liu,Xin Wang,Zhekun Shi,Qiang Zhao,Yifeng Lei,Shifang Luan,Longjian Xue
Water-durable adhesives are widely explored in various fields like wearable electronics, tissue engineering and sea refloatation. However, in harsh underwater environment, adhesives with sound and comprehensive performance on various surfaces remain highly challenging. Herein, we report a hydrophobic hydrogel adhesive composed of crystalline octadecyl (C18) chains with versatile, robust and thermally switchable underwater adhesion. The inherent hydrophobicity and the amorphous state of C18 chains allow the hydrogel adhesive to conformally adapt to underwater surfaces, independent of surface energy, curvature, charge and roughness as well as the salinity and pH of the water environment. The crystallization of C18 chains greatly increases the modulus of the hydrogel, interlocking the adhesive to the contacting surfaces and resulting in the underwater adhesion up to 275 kPa. The phase change of hydrogel regulates the stress distribution at the contact interface and the adhesion capacity, resulting in a switchable underwater adhesion. The phase change of C18 chains also endows the hydrogel self-healing property, ensuring durability and reusability. Moreover, the temperature of phase change is around ∼ 40 ℃, endowing adhesive with bio-applications in dynamic watery environments. Therefore, the adhesive is highly potential in emerging areas of wearable electronics, tissue engineering and so on.
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PANCREATOLOGY
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2023
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IF 3.6
Xin Wu,Xin Zhang,Peng Liu,Yao Wang
Background Pancreatic cancer is a common digestive system cancer and one of the most lethal malignancies worldwide. Ataxin-3 (ATXN3) protein is a deubiquitinating enzyme implicated in the occurrence of diverse human cancers. The potential role of ATXN3 in pancreatic cancer still remains unclear. Methods ATXN3 was screened from differentially-upregulated genes of GSE71989, GSE27890 and GSE40098 datasets. The mRNA and protein levels of ATXN3 was evaluated in pancreatic cancer samples and cell lines. Through the gain- and loss-of-function experiments, the effects of ATXN3 on cell proliferation , migration and invasion were evaluated using cell counting kit-8 (CCK-8), 5-ethynyl-2′-deoxyuridine (EdU) staining, wound healing and Transwell assays. Subsequently, the interaction between ATXN3 and HDAC6 was confirmed using double immunofluorescence staining, co-immunoprecipitation (co-IP) and proximity ligation assay (PLA). The underlying mechanism of ATXN3 was determined by knockdown of HDAC6 in ATXN3-upregulated pancreatic cancer cells. The function of ATXN3 in vivo was verified through xenograft assay. Results High expression of ATXN3 was found in pancreatic cancer tissues. Increased ATXN3 expression dramatically promoted cell proliferation, migration, and invasion. The malignant phenotypes were suppressed in ATXN3-silenced pancreatic cancer cells. ATXN3 was proved to interact with HDAC6 and regulate its degradation through deubiquitination . Downregulation of HDAC6 inhibited ATXN3-induced development of pancreatic cancer cells through regulating the expression of PCNA, vimentin and E-cadherin. ATXN3 facilitated tumor growth of pancreatic cancer and increased HDAC6 expression in vivo . Conclusions This study confirmed that ATXN3 facilitated malignant phenotypes of pancreatic cancer via reducing the ubiquitination of HDAC6.
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高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 42
·15447-15455
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IF 4
Xianliang Li,Diwei Deng,Lufang He,Yan Xu
Exploration of credible non-enzymatic glucose sensors with high selectivity and sensitivity is of great significance for early clinical monitoring of glucose concentration and preventing the threat of diabetes to human health. Here, mesoporous carbon (MC) sphere immobilized Co-MOF-74 nanorods (NRs), denoted as Co-MOF-74 NRs/MC, were successfully prepared, in which the nanostructural porous carbon sphere was obtained using cobalt glycolate as the built-in template followed by a subsequent carbonization and acid treatment, and the MC spheres were then in situ deposited on the surface of Co-MOF-74 NRs via a solvothermal method. Benefiting from the good conductivity of the grafted porous carbon spheres and the abundant active sites, as well as the permeability of microporous MOF-74 nanocrystals, the Co-MOF-74 NRs/MC modified glassy carbon electrode (GCE) exhibited effective non-enzymatic glucose sensing performance with a fast response time (less than 3 s) and a glucose sensitivity of 98.0 μA cm−2 mM−1. Furthermore, the Co-MOF-74 NRs/MC/GCE showed a favourable anti-interference capability in the presence of various interferents and good long-term reusability. The applicability of Co-MOF-74 NRs/MC/GCE for glucose sensing in real serum samples was also investigated, verifying the applicability of the electrode for targeted glucose monitoring in practical applications.
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ANALYTICAL LETTERS
·
2023
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IF 2
Hongdan Wang,Wei Yuan,Liqiu Zhang,Baogang Xie,Qiong Cheng,Ningwen Zhang
To precisely detect CA199 antigen, a novel electrochemical immunosensor based on horseradish peroxidase (HRP) and glucose oxidase (GOD) double enzyme system was prepared. Thiol was adsorbed on the surface of nano-octahedral gold through Au-S self-assembly; the second antibody was labeled by glutaraldehyde ligase as a signal amplification reagent. Amino magnetic microspheres were used to connect GOD and bovine serum albumin (BSA) through glutaraldehyde. The biosensor displayed low detection limits of 0.2 U/mL and wide linear range (0.5–200 U/mL). This novel immunosensor improves the sensitivity of current detection, showing promising application prospects in the clinical immunoassay detection of CA199.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 13
·5176
·
IF 4.6
Dongrong Cheng,Xiaofeng Wei,Yanting Zhang,Qian Zhang,Jianwei Xu,Jiaxin Yang,Junjie Yu,Antony Stalin,Huan Liu,Jintao Wang,Dian Zhong,Lanying Pan,Wei Zhao,Yuan Chen
Erythromycin is one of the few compounds that remarkably increase ether-a-go-go-related gene (hERG) inhibition from room temperature (RT) to physiological temperature (PT). Understanding how erythromycin inhibits the hERG could help us to decide which compounds are needed for further studies. The whole-cell patch clamp technique was used to investigate the effects of erythromycin on hERG channels at different temperatures. While erythromycin caused a concentration-dependent inhibition of cardiac hERG channels, it also shifted the steady-state activation and steady-state inactivation of the channel to the left and significantly accelerated the onset of inactivation at both temperatures, although temperature itself caused a profound change in the dynamics of hERG channels. Our data also suggest that the binding pattern to S6 of the channels changes at PT. In contrast, cisapride, a well-known hERG blocker whose inhibition is not affected by temperature, does not change its critical binding sites after the temperature is raised to PT. Our data suggest that erythromycin is unique and that the shift in hERG inhibition may not apply to other compounds.Keywords:erythromycin;temperature;hERG;steady-state activation;steady-state inactivation
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 7
·1-11
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IF 5.7
Li Yuchen,Xu Guangfu,Chen Jiaquan,Yu Tao,Miao Pandeng,Du Yingxiang
A novel chiral molecularly imprinted polymer TiO 2 nanoparticle was synthesized in one step for the enantioseparation of phenylalanine in coated capillary electrochromatography. To the author’s knowledge, the chiral molecularly imprinted nanomaterials have still not been reported, to date. Chiral molecularly imprinted TiO 2 nanomaterials (L-PHE@MIP(APTES-TEOS)@TiO 2 ) were used as a chiral stationary phase to separate the phenylalanine enantiomers in coated capillary electrochromatography (CEC). The imprinted coating was prepared from L-phenylalanine (L-PHE) as the template, TiO 2 nanoparticles (NPs) as the support substrate, 3-aminopropyltriethoxysilane (APTES) as the functional monomer, and tetraethyl silicate (TEOS) as the cross-linker. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO 2 @capillary. Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) were employed for the characterization of the L-PHE@MIP(APTES-TEOS)@TiO 2 . The effects of the applied voltage, pH value, buffer concentration, and acetonitrile content were investigated experimentally to determine the optimum conditions for CEC. The best resolution for phenylalanine enantiomers by CEC reached a value of 3.48. In addition, the specific recognition effect of L-PHE@MIP(APTES-TEOS)@TiO 2 on PHE enantiomers was studied by selective experiment. Finally, adsorption kinetic research, adsorption equilibrium isotherm study, and adsorption thermodynamic experiment were carried out to investigate the separation mechanism of PHE enantiomers with the L-PHE@MIP (APTES-TEOS)@TiO 2 @capillary, and the results were consistent with those of CEC experiments. Graphical Abstract
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Haoqiang Zhang,Hong Wei,Liang Xu,Yongjin Li,Zhiguo Song,Dacheng Zhou,Qi Wang,Zhangwen Long,Yong Yang,Yugeng Wen,Jin Han,Yuan Gao,Jianbei Qiu
It has been challenging to develop lanthanides doped chiral inorganic materials that emit circularly polarized light by upconversion. Here, we report the synthesis of bismuth oxychloride based inorganic nanostructured phosphor co-doped with Er 3+ , Yb 3+ , modified with chiral sugar alcohols (D-BYE), which exhibited a strong up-conversion circularly polarized luminescence (UC-CPL) property in the visible range. Compared with the achiral bismuth oxychloride phosphor co-doped with Er 3+ , Yb 3+ (A-BYE), D-BYE significantly improved the intensity of upconversion luminescence. Our studies showed that an accelerated rate of radiative transition induced by electromagnetic field and the Mie scattering effect may be responsible for the enhanced upconversion luminescence. Our works provide a new strategy to realize enhanced upconversion of circularly polarized luminescence with rare earth doped chiral inorganic materials.
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危险品化学品经营许可证（带存储）