AIM:To investigate the mechanisms involved in a possible modulator role of interleukin(IL) -6 signalling on CYR61-CTGF-NOV(CCN) 2/connective tissue growth factor(CTGF) expression in hepatocytes(PC) and to look for a r...AIM:To investigate the mechanisms involved in a possible modulator role of interleukin(IL) -6 signalling on CYR61-CTGF-NOV(CCN) 2/connective tissue growth factor(CTGF) expression in hepatocytes(PC) and to look for a relation between serum concentrations of these two parameters in patients with acute inflammation. METHODS:Expression of CCN2/CTGF,p-STAT3,p-Smad 3/1 and p-Smad2 was examined in primary freshly isolated rat or cryo-preserved human PC exposed to various stimuli by Western blotting,electrophoretic mobility shift assay(EMSA) ,reporter-gene-assays and reversetranscriptase polymerase chain reaction. RESULTS:IL-6 strongly down-regulated CCN2/CTGF protein and mRNA expression in PC,enhanceable by extracellular presence of the soluble IL-6 receptor gp80,and supported by an inverse relation between IL-6 and CCN2/CTGF concentrations in patients'sera.The inhi-bition of TGFβ1 driven CCN2/CTGF expression by IL-6 did not involve a modulation of Smad2(and Smad1/3) signalling.However,the STAT3 SH2 domain binding peptide,a selective inhibitor of STAT3 DNA binding activity,counteracted the inhibitory effect of IL-6 on CCN2/CTGF expression much more pronounced than pyrrolidine-dithiocarbamate,an inhibitor primarily of STAT3 phosphorylation.An EMSA confirmed STAT3 binding to the proposed proximal STAT binding site in the CCN2/CTGF promoter. CONCLUSION:CCN2/CTGF is identified as a hepatocellular negative acute phase protein which is downregulated by IL-6 via the STAT3 pathway through interaction on the DNA binding level.展开更多
Sleep benefits the restoration of energy metabolism and thereby suppo rts neuronal plasticity and cognitive behaviors.Sirt6 is a NAD+-dependent protein deacetylase that has been recognized as an essential regulator of...Sleep benefits the restoration of energy metabolism and thereby suppo rts neuronal plasticity and cognitive behaviors.Sirt6 is a NAD+-dependent protein deacetylase that has been recognized as an essential regulator of energy metabolism because it modulates various transcriptional regulators and metabolic enzymes.The aim of this study was to investigate the influence of Sirt6 on cerebral function after chronic sleep deprivation(CSD).We assigned C57BL/6J mice to control or two CSD groups and subjected them to AAV2/9-CMV-EGFP or AAV2/9-CMV-Sirt6-EGFP infection in the prelimbic cortex(PrL).We then assessed cerebral functional connectivity(FC) using resting-state functional MRI,neuron/astrocyte metabolism using a metabolic kinetics analysis;dendritic spine densities using sparse-labeling;and miniature excitato ry postsynaptic currents(mEPSCs) and action potential(AP) firing rates using whole-cell patchclamp recordings.In addition,we evaluated cognition via a comprehensive set of behavioral tests.Compared with controls,Sirt6 was significantly decreased(P<0.05) in the PrL after CSD,accompanied by cognitive deficits and decreased FC between the PrL and accumbens nucleus,piriform cortex,motor co rtex,somatosensory co rtex,olfactory tubercle,insular cortex,and cerebellum.Sirt6 ove rexpression reve rsed CSD-induced cognitive impairment and reduced FC.Our analysis of metabolic kinetics using [1-13C] glucose and [2-13C] acetate showed that CSD reduced neuronal Glu4and GABA2synthesis,which could be fully restored via forced Sirt6 expression.Furthermore,Sirt6 ove rexpression reversed CSD-induced decreases in AP firing rates as well as the frequency and amplitude of mEPSCs in PrL pyramidal neurons.These data indicate that Sirt6 can improve cognitive impairment after CSD by regulating the PrL-associated FC network,neuronal glucose metabolism,and glutamatergic neurotransmission.Thus,Sirt6 activation may have potential as a novel strategy for treating sleep disorder-related diseases.展开更多
As a new method,the ultraviolet spectrum technique is applied to studying the connectivity of biodegradable heavy oil reservoirs.The similarity of crude oils can be judged according to the extinction coefficient(E) be...As a new method,the ultraviolet spectrum technique is applied to studying the connectivity of biodegradable heavy oil reservoirs.The similarity of crude oils can be judged according to the extinction coefficient(E) because aromatic hydrocarbons and non-hydrocarbons have conjugated bonds and obvious absorption in the ultraviolet range,and different materials have different characteristics and additives.The relationship diagram is made in terms of the extinction coefficients(E) of the samples by taking E as the Y-axis and wavelength as the X-axis.The connectivity of oil reservoirs is estimated according to the curve positions and characteristic fingerprints of the samples.The connectivity of part of the reservoirs in the western part of the QHD32-6 oilfield was studied with this method.The results showed that the connectivity of samples from wells F7 and F8 in the Nm-2 oil reservoir zone is good,that of samples from wells F17 and F20 in the Nm-1 oil reservoir zone also is good,and that of samples from wells F17,F19,and F20 is poor.展开更多
目的:通过系统评价与Meta分析方法研究结缔组织病相关间质性肺病(CTD-ILD)患者血清涎液化糖链抗原-6(KL-6)与肺功能、实验室指标的相关性。方法:系统检索知网、万方、维普、PubMed、Cochrane Library及Web of Science数据库,从建库至202...目的:通过系统评价与Meta分析方法研究结缔组织病相关间质性肺病(CTD-ILD)患者血清涎液化糖链抗原-6(KL-6)与肺功能、实验室指标的相关性。方法:系统检索知网、万方、维普、PubMed、Cochrane Library及Web of Science数据库,从建库至2021年9月18日关于CTD-ILD患者KL-6与肺功能、实验室指标相关性的研究,对符合纳入标准的文献采用R 4.02软件进行Meta分析。结果:共纳入25个研究,包含1846名CTD-ILD患者。Meta分析结果显示:肺功能指标与血清KL-6有不同程度的负相关性,相关系数-0.619~-0.272;乳酸脱氢酶与血清KL-6有相关性,相关系数为0.383,其余实验室指标与血清KL-6无相关性(P>0.05)或弱相关性(r=-0.195~0.091)。结论:血清KL-6能够反映出CTD-ILD患者肺功能与炎症的严重程度,可作为CTD-ILD患者早期病情判断与临床决策的参考指标。展开更多
A new complex,[Co(HL)2(H2O)4]·H2O(1)(H2L =5-carboxy-1-carboxymethyl-2-oxidopyridinium),was synthesized and characterized by X-ray single-crystal diffraction,elemental analysis,and IR spectra.The crystal is monocl...A new complex,[Co(HL)2(H2O)4]·H2O(1)(H2L =5-carboxy-1-carboxymethyl-2-oxidopyridinium),was synthesized and characterized by X-ray single-crystal diffraction,elemental analysis,and IR spectra.The crystal is monoclinic,space group P21/c with a=0.512 69(2) nm,b=2.275 31(1) nm,c=1.003 95(6) nm,β=98.015(3)°,V= 1.159 7(1) nm3,Z=2,Mr=541.29,F(000)=558,Dc=1.550 g·cm-3,μ=0.816 mm-1,the final R=0.044 5 and wR=0.142 1 for 2 015 observed reflections(I>2σ(I)).Complex 1 can be considered constructed from 2D layers,which consist of left-and right-handed helical chains and further linked into a 3D supramolecular architecture by hydrogen bonds.Topology analysis reveals that complex 1 shows an unprecedented 3D binodal(5,6)-connected topology.展开更多
文摘AIM:To investigate the mechanisms involved in a possible modulator role of interleukin(IL) -6 signalling on CYR61-CTGF-NOV(CCN) 2/connective tissue growth factor(CTGF) expression in hepatocytes(PC) and to look for a relation between serum concentrations of these two parameters in patients with acute inflammation. METHODS:Expression of CCN2/CTGF,p-STAT3,p-Smad 3/1 and p-Smad2 was examined in primary freshly isolated rat or cryo-preserved human PC exposed to various stimuli by Western blotting,electrophoretic mobility shift assay(EMSA) ,reporter-gene-assays and reversetranscriptase polymerase chain reaction. RESULTS:IL-6 strongly down-regulated CCN2/CTGF protein and mRNA expression in PC,enhanceable by extracellular presence of the soluble IL-6 receptor gp80,and supported by an inverse relation between IL-6 and CCN2/CTGF concentrations in patients'sera.The inhi-bition of TGFβ1 driven CCN2/CTGF expression by IL-6 did not involve a modulation of Smad2(and Smad1/3) signalling.However,the STAT3 SH2 domain binding peptide,a selective inhibitor of STAT3 DNA binding activity,counteracted the inhibitory effect of IL-6 on CCN2/CTGF expression much more pronounced than pyrrolidine-dithiocarbamate,an inhibitor primarily of STAT3 phosphorylation.An EMSA confirmed STAT3 binding to the proposed proximal STAT binding site in the CCN2/CTGF promoter. CONCLUSION:CCN2/CTGF is identified as a hepatocellular negative acute phase protein which is downregulated by IL-6 via the STAT3 pathway through interaction on the DNA binding level.
基金National Natural Science Foundation of China,Nos.81771160 (to ZZ),81671060 (to CC),31970973 (to JW),21921004 (to FX)Translational Medicine and In terdisciplinary Research Joint Fund of Zhongnan Hospital of Wuhan University,No.ZNJC201934 (to ZZ)。
文摘Sleep benefits the restoration of energy metabolism and thereby suppo rts neuronal plasticity and cognitive behaviors.Sirt6 is a NAD+-dependent protein deacetylase that has been recognized as an essential regulator of energy metabolism because it modulates various transcriptional regulators and metabolic enzymes.The aim of this study was to investigate the influence of Sirt6 on cerebral function after chronic sleep deprivation(CSD).We assigned C57BL/6J mice to control or two CSD groups and subjected them to AAV2/9-CMV-EGFP or AAV2/9-CMV-Sirt6-EGFP infection in the prelimbic cortex(PrL).We then assessed cerebral functional connectivity(FC) using resting-state functional MRI,neuron/astrocyte metabolism using a metabolic kinetics analysis;dendritic spine densities using sparse-labeling;and miniature excitato ry postsynaptic currents(mEPSCs) and action potential(AP) firing rates using whole-cell patchclamp recordings.In addition,we evaluated cognition via a comprehensive set of behavioral tests.Compared with controls,Sirt6 was significantly decreased(P<0.05) in the PrL after CSD,accompanied by cognitive deficits and decreased FC between the PrL and accumbens nucleus,piriform cortex,motor co rtex,somatosensory co rtex,olfactory tubercle,insular cortex,and cerebellum.Sirt6 ove rexpression reve rsed CSD-induced cognitive impairment and reduced FC.Our analysis of metabolic kinetics using [1-13C] glucose and [2-13C] acetate showed that CSD reduced neuronal Glu4and GABA2synthesis,which could be fully restored via forced Sirt6 expression.Furthermore,Sirt6 ove rexpression reversed CSD-induced decreases in AP firing rates as well as the frequency and amplitude of mEPSCs in PrL pyramidal neurons.These data indicate that Sirt6 can improve cognitive impairment after CSD by regulating the PrL-associated FC network,neuronal glucose metabolism,and glutamatergic neurotransmission.Thus,Sirt6 activation may have potential as a novel strategy for treating sleep disorder-related diseases.
文摘As a new method,the ultraviolet spectrum technique is applied to studying the connectivity of biodegradable heavy oil reservoirs.The similarity of crude oils can be judged according to the extinction coefficient(E) because aromatic hydrocarbons and non-hydrocarbons have conjugated bonds and obvious absorption in the ultraviolet range,and different materials have different characteristics and additives.The relationship diagram is made in terms of the extinction coefficients(E) of the samples by taking E as the Y-axis and wavelength as the X-axis.The connectivity of oil reservoirs is estimated according to the curve positions and characteristic fingerprints of the samples.The connectivity of part of the reservoirs in the western part of the QHD32-6 oilfield was studied with this method.The results showed that the connectivity of samples from wells F7 and F8 in the Nm-2 oil reservoir zone is good,that of samples from wells F17 and F20 in the Nm-1 oil reservoir zone also is good,and that of samples from wells F17,F19,and F20 is poor.
文摘目的:通过系统评价与Meta分析方法研究结缔组织病相关间质性肺病(CTD-ILD)患者血清涎液化糖链抗原-6(KL-6)与肺功能、实验室指标的相关性。方法:系统检索知网、万方、维普、PubMed、Cochrane Library及Web of Science数据库,从建库至2021年9月18日关于CTD-ILD患者KL-6与肺功能、实验室指标相关性的研究,对符合纳入标准的文献采用R 4.02软件进行Meta分析。结果:共纳入25个研究,包含1846名CTD-ILD患者。Meta分析结果显示:肺功能指标与血清KL-6有不同程度的负相关性,相关系数-0.619~-0.272;乳酸脱氢酶与血清KL-6有相关性,相关系数为0.383,其余实验室指标与血清KL-6无相关性(P>0.05)或弱相关性(r=-0.195~0.091)。结论:血清KL-6能够反映出CTD-ILD患者肺功能与炎症的严重程度,可作为CTD-ILD患者早期病情判断与临床决策的参考指标。
文摘A new complex,[Co(HL)2(H2O)4]·H2O(1)(H2L =5-carboxy-1-carboxymethyl-2-oxidopyridinium),was synthesized and characterized by X-ray single-crystal diffraction,elemental analysis,and IR spectra.The crystal is monoclinic,space group P21/c with a=0.512 69(2) nm,b=2.275 31(1) nm,c=1.003 95(6) nm,β=98.015(3)°,V= 1.159 7(1) nm3,Z=2,Mr=541.29,F(000)=558,Dc=1.550 g·cm-3,μ=0.816 mm-1,the final R=0.044 5 and wR=0.142 1 for 2 015 observed reflections(I>2σ(I)).Complex 1 can be considered constructed from 2D layers,which consist of left-and right-handed helical chains and further linked into a 3D supramolecular architecture by hydrogen bonds.Topology analysis reveals that complex 1 shows an unprecedented 3D binodal(5,6)-connected topology.
