4-Nitrophenol(4-NP),as a toxic and refractory pollutant,has generated significant concern due to its adverse effects.However,the potential toxic effects andmechanism remained unclear.In this study,the reproduction,dev...4-Nitrophenol(4-NP),as a toxic and refractory pollutant,has generated significant concern due to its adverse effects.However,the potential toxic effects andmechanism remained unclear.In this study,the reproduction,development,locomotion and reactive oxygen species(ROS)production of Caenorhabditis elegans were investigated to evaluate the 4-NP toxicity.We used metabolomics to assess the potential damage mechanisms.The role of metabolites in mediating the relationship between 4-NP and phenotypes was examined by correlation and mediation analysis.4-NP(8 ng/L and 8μg/L)caused significant reduction of brood size,ovulation rate,total germ cells numbers,head thrashes and body bends,and an increase in ROS.However,the oosperm numbers in uterus,body length and body width were decreased in 8μg/L.Moreover,36 differential metabolites were enriched in the significant metabolic pathways,including lysine biosynthesis,β-alanine metabolism,tryptophan metabolism,pentose phosphate pathway,pentose and glucuronate interconversions,amino sugar and nucleotide sugar metabolism,starch and sucrose metabolism,galactose metabolism,propanoate metabolism,glycerolipid metabolism,and estrogen signaling pathway.The mechanism of 4-NP toxicity was that oxidative stress caused by the perturbation of amino acid,which had effects on energy metabolism through disturbing carbohydrate and lipid metabolism,and finally affected the estrogen signaling pathway to exert toxic effects.Moreover,correlation and mediation analysis showed glycerol-3P,glucosamine-6P,glucosamine-1P,UDP-galactose,L-aspartic acid,and uracilwere potential markers for the reproduction and glucose-1,6P2 for developmental toxicity.The results provided insight into the pathways involved in the toxic effects caused by 4-NP and developed potential biomarkers to evaluate 4-NP toxicity.展开更多
Dear Editor, Newcastle disease virus （NDV）, also known as avian paramyxovirus serotype 1 （APMV-1）, is a member of the genus Avulavirus within the family Paramyxoviridae, or- der Mononegavirales （Miller et al., 2...Dear Editor, Newcastle disease virus （NDV）, also known as avian paramyxovirus serotype 1 （APMV-1）, is a member of the genus Avulavirus within the family Paramyxoviridae, or- der Mononegavirales （Miller et al., 2010）. Although all isolated NDV strains belong to a single serotype, epi- demiological studies have revealed that the genotype VII strain is currently the most prevalent circulating geno- type worldwide and is associated with many of the most recent outbreaks in China since 1997 （Liu et al., 2007）.展开更多
Dear Editor,Early diagnosis is critical for successful treatment of gastric adenocarcinoma(GA).However,the sensitivities of tumor markers carcinoembryonic antigen(CEA),cancer antigen 19-9(CA19-9)and CA72-4 for GA dete...Dear Editor,Early diagnosis is critical for successful treatment of gastric adenocarcinoma(GA).However,the sensitivities of tumor markers carcinoembryonic antigen(CEA),cancer antigen 19-9(CA19-9)and CA72-4 for GA detection are approximately 20%[1],and the sensitivities of all markers combined for early gastric cancer detection is still very low[2].DNA methylation plays a major role in tumorigenesis and therefore has obvious potential as a non-invasive biomarker for cancer detection[3].Through genome-wide methylation analysis and histological verification,we previously identified ring finger protein 180(RNF180)as a novel preferentially methylated gene in GA[4,5].展开更多
This paper reports an overpotential-dependent shape evolution of gold nano-crystals （Au NCs） in a choline chloride-urea （ChCl-urea） based deep eutectic solvent （DES）. It was found that the growth overpotentials ...This paper reports an overpotential-dependent shape evolution of gold nano-crystals （Au NCs） in a choline chloride-urea （ChCl-urea） based deep eutectic solvent （DES）. It was found that the growth overpotentials play a key role in tuning the shape of Au NCs. The shape evolution of Au NCs successively from concave rhombic dodecahedra （RD） to concave cubes, octopods, cuboctahedral boxes, and finally, to hollow octahedra （OH） was achieved by carefully controlling the growth overpotentials in the range from -0.50 to -0.95 V （vs. Pt quasi-reference electrode）. In addition, the presence of urea was important in the shape evolution of Au NCs. The surface structure of the as-prepared Au NCs was comprehensively characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and electrochemical studies. It was demonstrated that the electrocatalytic activity of the as-prepared Au NCs for D-glucose electrooxidation was sensitively dependent on their morphologies. The results illustrated that the dehydrogenated glucose adsorbed on concave RD and concave cubic Au NCs was preferentially transformed to gluconolactone at low electrode potentials. Subsequent gluconolactone oxidation occurred favorably on octopods with {111}-truncated arms and hollow OH at high electrode potential. This study opens up a new approach to develop the surface-structure-controlled growth of Au NCs by combining DES with electrochemical techniques. In addition, it is significant for the tuning of the electrocatalytic properties of NCs.展开更多
Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-l...Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-layer nanopore array shows a remarkable electrochromic performance with large dual-band optical modulation in both visible(VIS)and near infrared(NIR)regions(optical modulation of over 70%in the wavelength range from 600 to 1600 nm)and the fast response speed(coloring for 3.4 s and bleaching for 6.6 s).In addition,the bi-layer WO_(3)/Ti-doped WO_(3)nanopore array also present superior energy-storage properties(areal capacitance of 44.0 mF cm−2 and good rate capability),better than that of titanium-free thin films.The special bifunctional characteristics of electrochromism and pseudocapacitance can be ascribed to the large specific surface area provided by the architectural design,rich ion channels in the amorphous layer as well as proper titanium doping,which bestows the bi-layer nanopore array a great potential in clean energy applications.展开更多
基金supported by the National Natural Science Foundation of China(Nos.82173479 and 81872579)Jiangsu Provincial Maternal and Child Health Scientific Research Project(No.F201907).
文摘4-Nitrophenol(4-NP),as a toxic and refractory pollutant,has generated significant concern due to its adverse effects.However,the potential toxic effects andmechanism remained unclear.In this study,the reproduction,development,locomotion and reactive oxygen species(ROS)production of Caenorhabditis elegans were investigated to evaluate the 4-NP toxicity.We used metabolomics to assess the potential damage mechanisms.The role of metabolites in mediating the relationship between 4-NP and phenotypes was examined by correlation and mediation analysis.4-NP(8 ng/L and 8μg/L)caused significant reduction of brood size,ovulation rate,total germ cells numbers,head thrashes and body bends,and an increase in ROS.However,the oosperm numbers in uterus,body length and body width were decreased in 8μg/L.Moreover,36 differential metabolites were enriched in the significant metabolic pathways,including lysine biosynthesis,β-alanine metabolism,tryptophan metabolism,pentose phosphate pathway,pentose and glucuronate interconversions,amino sugar and nucleotide sugar metabolism,starch and sucrose metabolism,galactose metabolism,propanoate metabolism,glycerolipid metabolism,and estrogen signaling pathway.The mechanism of 4-NP toxicity was that oxidative stress caused by the perturbation of amino acid,which had effects on energy metabolism through disturbing carbohydrate and lipid metabolism,and finally affected the estrogen signaling pathway to exert toxic effects.Moreover,correlation and mediation analysis showed glycerol-3P,glucosamine-6P,glucosamine-1P,UDP-galactose,L-aspartic acid,and uracilwere potential markers for the reproduction and glucose-1,6P2 for developmental toxicity.The results provided insight into the pathways involved in the toxic effects caused by 4-NP and developed potential biomarkers to evaluate 4-NP toxicity.
基金supported by the Innovation Foundation Project of China Animal Health and Epidemiology Center,Ministry of Agriculture,P.R.China(project no:CAHEC-2015-Y105)supported by the National Natural Scientific Fund(31272561)
文摘Dear Editor, Newcastle disease virus （NDV）, also known as avian paramyxovirus serotype 1 （APMV-1）, is a member of the genus Avulavirus within the family Paramyxoviridae, or- der Mononegavirales （Miller et al., 2010）. Although all isolated NDV strains belong to a single serotype, epi- demiological studies have revealed that the genotype VII strain is currently the most prevalent circulating geno- type worldwide and is associated with many of the most recent outbreaks in China since 1997 （Liu et al., 2007）.
基金supported by the National Key R&D Program of China(Grant no.2016YFC1303200,2022YFC2505100,2017YFC0908300,and 2018YFC1313101)Tianjin Key Medical Discipline(Specialty)Construction Project(Grant no.TJYXZDXK-009A)Beijing Munic-ipal Science&Technology Commission,Administrative Commission of Zhongguancun Science Park(Grant no.Z201100005420007).
文摘Dear Editor,Early diagnosis is critical for successful treatment of gastric adenocarcinoma(GA).However,the sensitivities of tumor markers carcinoembryonic antigen(CEA),cancer antigen 19-9(CA19-9)and CA72-4 for GA detection are approximately 20%[1],and the sensitivities of all markers combined for early gastric cancer detection is still very low[2].DNA methylation plays a major role in tumorigenesis and therefore has obvious potential as a non-invasive biomarker for cancer detection[3].Through genome-wide methylation analysis and histological verification,we previously identified ring finger protein 180(RNF180)as a novel preferentially methylated gene in GA[4,5].
基金This study was supported financially by the National Natural Science Foundation of China （Nos. 21361140374, 21229301, 21378113, and 21573183） and the Natural Science Fund project in Jiangsu Province, China （No. BK20160210）.
文摘This paper reports an overpotential-dependent shape evolution of gold nano-crystals （Au NCs） in a choline chloride-urea （ChCl-urea） based deep eutectic solvent （DES）. It was found that the growth overpotentials play a key role in tuning the shape of Au NCs. The shape evolution of Au NCs successively from concave rhombic dodecahedra （RD） to concave cubes, octopods, cuboctahedral boxes, and finally, to hollow octahedra （OH） was achieved by carefully controlling the growth overpotentials in the range from -0.50 to -0.95 V （vs. Pt quasi-reference electrode）. In addition, the presence of urea was important in the shape evolution of Au NCs. The surface structure of the as-prepared Au NCs was comprehensively characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and electrochemical studies. It was demonstrated that the electrocatalytic activity of the as-prepared Au NCs for D-glucose electrooxidation was sensitively dependent on their morphologies. The results illustrated that the dehydrogenated glucose adsorbed on concave RD and concave cubic Au NCs was preferentially transformed to gluconolactone at low electrode potentials. Subsequent gluconolactone oxidation occurred favorably on octopods with {111}-truncated arms and hollow OH at high electrode potential. This study opens up a new approach to develop the surface-structure-controlled growth of Au NCs by combining DES with electrochemical techniques. In addition, it is significant for the tuning of the electrocatalytic properties of NCs.
基金the National Natural Science Foundation of China(Grant Nos.51772072 and 51701057)the 111 Project“New Materials and Technology for Clean Energy”(Grant No.B18018)+2 种基金the Foundation for Tianchang Intelligent Equipment and Instruments Research Institute(Grant No.JZ2017AHDS1147)the Natural Science Foundation of Anhui Province(Grant No.1708085ME100)the Fundamental Research Funds for the Central Universities(Grant Nos.PA2019GDQT0022,PA2019GDQT0015,201710359015).
文摘Crystalline WO_(3)/Ti-doped WO_(3)bi-layer nanopore arrays were constructed by the template synthesis of a WO_(3)nanopore layer modified by a magnetron sputtering of an amorphous Ti-doped/WO_(3)layer.The obtained bi-layer nanopore array shows a remarkable electrochromic performance with large dual-band optical modulation in both visible(VIS)and near infrared(NIR)regions(optical modulation of over 70%in the wavelength range from 600 to 1600 nm)and the fast response speed(coloring for 3.4 s and bleaching for 6.6 s).In addition,the bi-layer WO_(3)/Ti-doped WO_(3)nanopore array also present superior energy-storage properties(areal capacitance of 44.0 mF cm−2 and good rate capability),better than that of titanium-free thin films.The special bifunctional characteristics of electrochromism and pseudocapacitance can be ascribed to the large specific surface area provided by the architectural design,rich ion channels in the amorphous layer as well as proper titanium doping,which bestows the bi-layer nanopore array a great potential in clean energy applications.
