The hybrid scenario,which has good confinement and moderate MHD instabilities,is a proposed operation scenario for international thermonuclear experimental reactor(ITER).In this work,the effect of plasma rotation on t...The hybrid scenario,which has good confinement and moderate MHD instabilities,is a proposed operation scenario for international thermonuclear experimental reactor(ITER).In this work,the effect of plasma rotation on the HL-3 hybrid scenario is analyzed with the integrated modeling framework OMFIT.The results show that toroidal rotation has no obvious effect on confinement with a high line averaged density of n_(bar)~(7)×10^(19)m^(-3).In this case,the ion temperature only changes from 4.7 keV to 4.4 keV with the rotation decreasing from 10^(5) rad/s to 10^(3) rad/s,which means that the turbulent heat transport is not dominant.While in the scenarios characterized by lower densities,such as n_(bar)~4×10^(19)m^(-3),turbulent transport becomes dominant in determining heat transport.The ion temperature rises from 3.8 keV to 6.1 keV in the core as the rotation velocity increases from 10^(3) rad/s to 10^(5) rad/s.Despite the ion temperature rising,the rotation velocity does not obviously affect electron temperature or density.Additionally,it is noteworthy that the variation in rotation velocity does not significantly affect the global confinement of plasma in scenarios with low density or with high density.展开更多
Inhibiting the death receptor 3(DR3)signaling pathway in group 3 innate lymphoid cells(ILC3s)presents a promising approach for promoting mucosal repair in individuals with ulcerative colitis(UC).Paeoniflorin,a promine...Inhibiting the death receptor 3(DR3)signaling pathway in group 3 innate lymphoid cells(ILC3s)presents a promising approach for promoting mucosal repair in individuals with ulcerative colitis(UC).Paeoniflorin,a prominent component of Paeonia lactiflora Pall.,has demonstrated the ability to restore barrier function in UC mice,but the precise mechanism remains unclear.In this study,we aimed to delve into whether paeoniflorin may promote intestinal mucosal repair in chronic colitis by inhibiting DR3 signaling in ILC3s.C57BL/6 mice were subjected to random allocation into 7 distinct groups,namely the control group,the 2%dextran sodium sulfate(DSS)group,the paeoniflorin groups(25,50,and 100 mg/kg),the anti-tumor necrosis factor-like ligand 1A(anti-TL1A)antibody group,and the IgG group.We detected the expression of DR3 signaling pathway proteins and the proportion of ILC3s in the mouse colon using Western blot and flow cytometry,respectively.Meanwhile,DR3-overexpressing MNK-3 cells and 2%DSS-induced Rag1^(-/-)mice were used for verification.The results showed that paeoniflorin alleviated DSS-induced chronic colitis and repaired the intestinal mucosal barrier.Simultaneously,paeoniflorin inhibited the DR3 signaling pathway in ILC3s and regulated the content of cytokines(interleukin-17A,granulocyte-macrophage colony stimulating factor,and interleukin-22).Alternatively,paeoniflorin directly inhibited the DR3 signaling pathway in ILC3s to repair mucosal damage independently of the adaptive immune system.We additionally confirmed that paeoniflorin-conditioned medium(CM)restored the expression of tight junctions in Caco-2 cells via coculture.In conclusion,paeoniflorin ameliorates chronic colitis by enhancing the intestinal barrier in an ILC3-dependent manner,and its mechanism is associated with the inhibition of the DR3 signaling pathway.展开更多
Objective Innate lymphoid cells(ILCs)are a class of newly discovered immunocytes.Group 1 ILCs(ILC1s)are identified in the decidua of humans and mice.High mobility group box 1(HMGB1)is predicted to be one of the target...Objective Innate lymphoid cells(ILCs)are a class of newly discovered immunocytes.Group 1 ILCs(ILC1s)are identified in the decidua of humans and mice.High mobility group box 1(HMGB1)is predicted to be one of the target genes of miR-142-3p,which is closely related to pregnancy-related diseases.Furthermore,miR-142-3p and HMGB1 are involved in regulating the NF-κB signaling pathway.This study aimed to examine the regulatory effect of miR-142-3p on ILC1s and the underlying mechanism involving HMGB1 and the NF-κB signaling pathway.Methods Mouse models of normal pregnancy and abortion were constructed,and the alterations of ILC1s,miR-142-3p,ILC1 transcription factor(T-bet),and pro-inflammatory cytokines of ILC1s(TNF-α,IFN-γand IL-2)were detected in mice from different groups.The targeting regulation of HMGB1 by miR-142-3p in ILC1s,and the expression of HMGB1 in normal pregnant mice and abortive mice were investigated.In addition,the regulatory effects of miR-142-3p and HMGB1 on ILC1s were detected in vitro by CCK-8,Annexin-V/PI,ELISA,and RT-PCR,respectively.Furthermore,changes of the NF-κB signaling pathway in ILC1s were examined in the different groups.For the in vivo studies,miR-142-3p-Agomir was injected in the uterus of abortive mice to evaluate the abortion rate and alterations of ILC1s at the maternal-fetal interface,and further detect the expression of HMGB1,pro-inflammatory cytokines,and the NF-κB signaling pathway.Results The number of ILC1s was significantly increased,the level of HMGB1 was significantly upregulated,and that of miR-142-3p was considerably downregulated in the abortive mice as compared with the normal pregnant mice(all P<0.05).In addition,miR-142-3p was found to drastically inhibit the activation of the NF-κB signaling pathway(P<0.05).The number of ILC1s and the levels of pro-inflammatory cytokines were significantly downregulated and the activation of the NF-κB signaling pathway was inhibited in the miR-142-3p Agomir group(all P<0.05).Conclusion miR-142-3p can regulate ILC1s by targeting HMGB1 via the NF-κB signaling pathway,and attenuate the inflammation at the maternal-fetal interface in abortive mice.展开更多
The interaction between pile and soft soil of the passive pile group subjected to soil movement was analyzed with three-dimensional finite element model by using ANSYS software. The soil was assumed to be elastic-plas...The interaction between pile and soft soil of the passive pile group subjected to soil movement was analyzed with three-dimensional finite element model by using ANSYS software. The soil was assumed to be elastic-plastic complying with the Drucker-Prager yield criterion in the analysis. The large displacement of soil was considered and contact elements were used to evaluate the interaction between pile and soil. The influences of soil depth of layer and number of piles on the lateral pressure of the pile were investigated, and the lateral pressure distributions on the (2×1) pile group and on the (2×2) pile group were compared. The results show that the adjacent surcharge may result in significant lateral movement of the soft soil and considerable pressure on the pile. The pressure acting on the row near the surcharge is higher than that on the other row, due to the "barrier" and arching effects in pile groups. The passive load and its distribution should be taken into account in the design of the passive piles.展开更多
目的 分析开放性胃肠手术患儿术后血清降钙素原(procalcitonin, PCT)、正五聚蛋白3(pentraxin 3,PTX3)、高迁移率族蛋白B1(high mobility group protein B1,HMGB-1)表达及其预测早期感染的价值。方法 2020年1月~2023年1月我院收治的开...目的 分析开放性胃肠手术患儿术后血清降钙素原(procalcitonin, PCT)、正五聚蛋白3(pentraxin 3,PTX3)、高迁移率族蛋白B1(high mobility group protein B1,HMGB-1)表达及其预测早期感染的价值。方法 2020年1月~2023年1月我院收治的开放性胃肠手术患儿206例,依据术后是否并发感染分为感染组(27例)和未感染组(179例)。比较两组一般资料及围手术期指标,比较两组术前、术后1天、3天血清PCT、PTX3、HMGB-1水平;观察术后1天、3天各血清指标单一、联合检测对开放性胃肠手术患儿术后感染的预测价值;多因素Logistic回归分析术后感染的影响因素。结果 感染组术后1天、3天血清PCT、PTX3、HMGB-1水平分别为(2.42±0.39)μg/L、(3.74±0.53)μg/L,(2.07±0.66)μg/L、(3.06±0.75)μg/L,(18.35±2.74)μg/L、(26.09±4.16)μg/L,均高于未感染组的(1.71±0.35)μg/L、(2.29±0.36)μg/L,(1.48±0.52)μg/L、(1.73±0.59)μg/L,(13.04±2.26)μg/L、(15.75±2.83)μg/L,两组比较差异有统计学意义(P<0.05);绘制受试者工作特征(receiver operating characteristic, ROC)曲线显示,术后3天血清PCT、PTX3、HMGB-1联合检测预测开放性胃肠手术患儿术后感染的曲线下面积(Area under the curve, AUC)最大,为0.989;多因素Logistic回归分析显示,年龄为患儿术后感染的独立保护因素,术中出血量、手术时间、术后1天、3天血清PCT、PTX3、HMGB-1为独立危险因素(P<0.05);感染组中重度感染患儿术后1天、3天血清PCT、PTX3、HMGB-1水平分别为(2.63±0.34)μg/L、(4.12±0.56)μg/L、(2.31±0.69)μg/L、(3.39±0.81)μg/L、(19.86±2.91)μg/L、(28.84±4.40)μg/L,均高于轻度感染患儿的(2.11±0.28)μg/L、(3.19±0.49)μg/L、(1.72±0.60)μg/L、(2.58±0.73)μg/L、(16.15±2.39)μg/L、(22.09±3.96)μg/L,差异有统计学意义(P<0.05)。结论 开放性胃肠手术患儿术后血清PCT、PTX3、HMGB-1表达显著增高,且其表达与术后早期感染及感染病情程度有关,三者联合预测价值更高。展开更多
Trimethylchlorosilane was used as a stereoselective reagent to determine the e or a orientation of 3-hydroxyl group of some steroids by chemical ionization mass spectrometry.
基金Project supported by the National Magnetic Confinement Fusion Program of China (Grants Nos.2019YFE03040002 and 2018YFE0301101)the Talent Project of China National Nuclear Corporation,China (Grant No.2022JZYF-01)。
文摘The hybrid scenario,which has good confinement and moderate MHD instabilities,is a proposed operation scenario for international thermonuclear experimental reactor(ITER).In this work,the effect of plasma rotation on the HL-3 hybrid scenario is analyzed with the integrated modeling framework OMFIT.The results show that toroidal rotation has no obvious effect on confinement with a high line averaged density of n_(bar)~(7)×10^(19)m^(-3).In this case,the ion temperature only changes from 4.7 keV to 4.4 keV with the rotation decreasing from 10^(5) rad/s to 10^(3) rad/s,which means that the turbulent heat transport is not dominant.While in the scenarios characterized by lower densities,such as n_(bar)~4×10^(19)m^(-3),turbulent transport becomes dominant in determining heat transport.The ion temperature rises from 3.8 keV to 6.1 keV in the core as the rotation velocity increases from 10^(3) rad/s to 10^(5) rad/s.Despite the ion temperature rising,the rotation velocity does not obviously affect electron temperature or density.Additionally,it is noteworthy that the variation in rotation velocity does not significantly affect the global confinement of plasma in scenarios with low density or with high density.
基金supported by the National Natural Science Foundation of China(Grant No.:82074092),Natural Science Foundation of Guangdong Province,China(Grant No.:2021A1515012219)Guangzhou University of Chinese Medicine“Double First-Class”and High-level University Discipline Collaborative Innovation Team Project,China(Grant No.:2021xk81) and Graduate Research Innovation Project of Guangzhou University of Chinese Medicine,China.
文摘Inhibiting the death receptor 3(DR3)signaling pathway in group 3 innate lymphoid cells(ILC3s)presents a promising approach for promoting mucosal repair in individuals with ulcerative colitis(UC).Paeoniflorin,a prominent component of Paeonia lactiflora Pall.,has demonstrated the ability to restore barrier function in UC mice,but the precise mechanism remains unclear.In this study,we aimed to delve into whether paeoniflorin may promote intestinal mucosal repair in chronic colitis by inhibiting DR3 signaling in ILC3s.C57BL/6 mice were subjected to random allocation into 7 distinct groups,namely the control group,the 2%dextran sodium sulfate(DSS)group,the paeoniflorin groups(25,50,and 100 mg/kg),the anti-tumor necrosis factor-like ligand 1A(anti-TL1A)antibody group,and the IgG group.We detected the expression of DR3 signaling pathway proteins and the proportion of ILC3s in the mouse colon using Western blot and flow cytometry,respectively.Meanwhile,DR3-overexpressing MNK-3 cells and 2%DSS-induced Rag1^(-/-)mice were used for verification.The results showed that paeoniflorin alleviated DSS-induced chronic colitis and repaired the intestinal mucosal barrier.Simultaneously,paeoniflorin inhibited the DR3 signaling pathway in ILC3s and regulated the content of cytokines(interleukin-17A,granulocyte-macrophage colony stimulating factor,and interleukin-22).Alternatively,paeoniflorin directly inhibited the DR3 signaling pathway in ILC3s to repair mucosal damage independently of the adaptive immune system.We additionally confirmed that paeoniflorin-conditioned medium(CM)restored the expression of tight junctions in Caco-2 cells via coculture.In conclusion,paeoniflorin ameliorates chronic colitis by enhancing the intestinal barrier in an ILC3-dependent manner,and its mechanism is associated with the inhibition of the DR3 signaling pathway.
基金supported by the National Key Research and Development Program of China(Nos.2018YFC1002804 and 2016YFC1000600)the National Natural Science Foundation of China(Nos.81771618 and 81971356)the Fundamental Research Funds for the Central Universities(No.2042023kf0028).
文摘Objective Innate lymphoid cells(ILCs)are a class of newly discovered immunocytes.Group 1 ILCs(ILC1s)are identified in the decidua of humans and mice.High mobility group box 1(HMGB1)is predicted to be one of the target genes of miR-142-3p,which is closely related to pregnancy-related diseases.Furthermore,miR-142-3p and HMGB1 are involved in regulating the NF-κB signaling pathway.This study aimed to examine the regulatory effect of miR-142-3p on ILC1s and the underlying mechanism involving HMGB1 and the NF-κB signaling pathway.Methods Mouse models of normal pregnancy and abortion were constructed,and the alterations of ILC1s,miR-142-3p,ILC1 transcription factor(T-bet),and pro-inflammatory cytokines of ILC1s(TNF-α,IFN-γand IL-2)were detected in mice from different groups.The targeting regulation of HMGB1 by miR-142-3p in ILC1s,and the expression of HMGB1 in normal pregnant mice and abortive mice were investigated.In addition,the regulatory effects of miR-142-3p and HMGB1 on ILC1s were detected in vitro by CCK-8,Annexin-V/PI,ELISA,and RT-PCR,respectively.Furthermore,changes of the NF-κB signaling pathway in ILC1s were examined in the different groups.For the in vivo studies,miR-142-3p-Agomir was injected in the uterus of abortive mice to evaluate the abortion rate and alterations of ILC1s at the maternal-fetal interface,and further detect the expression of HMGB1,pro-inflammatory cytokines,and the NF-κB signaling pathway.Results The number of ILC1s was significantly increased,the level of HMGB1 was significantly upregulated,and that of miR-142-3p was considerably downregulated in the abortive mice as compared with the normal pregnant mice(all P<0.05).In addition,miR-142-3p was found to drastically inhibit the activation of the NF-κB signaling pathway(P<0.05).The number of ILC1s and the levels of pro-inflammatory cytokines were significantly downregulated and the activation of the NF-κB signaling pathway was inhibited in the miR-142-3p Agomir group(all P<0.05).Conclusion miR-142-3p can regulate ILC1s by targeting HMGB1 via the NF-κB signaling pathway,and attenuate the inflammation at the maternal-fetal interface in abortive mice.
基金Project(50378036) supported by the National Natural Science Foundation of China
文摘The interaction between pile and soft soil of the passive pile group subjected to soil movement was analyzed with three-dimensional finite element model by using ANSYS software. The soil was assumed to be elastic-plastic complying with the Drucker-Prager yield criterion in the analysis. The large displacement of soil was considered and contact elements were used to evaluate the interaction between pile and soil. The influences of soil depth of layer and number of piles on the lateral pressure of the pile were investigated, and the lateral pressure distributions on the (2×1) pile group and on the (2×2) pile group were compared. The results show that the adjacent surcharge may result in significant lateral movement of the soft soil and considerable pressure on the pile. The pressure acting on the row near the surcharge is higher than that on the other row, due to the "barrier" and arching effects in pile groups. The passive load and its distribution should be taken into account in the design of the passive piles.
文摘目的 分析开放性胃肠手术患儿术后血清降钙素原(procalcitonin, PCT)、正五聚蛋白3(pentraxin 3,PTX3)、高迁移率族蛋白B1(high mobility group protein B1,HMGB-1)表达及其预测早期感染的价值。方法 2020年1月~2023年1月我院收治的开放性胃肠手术患儿206例,依据术后是否并发感染分为感染组(27例)和未感染组(179例)。比较两组一般资料及围手术期指标,比较两组术前、术后1天、3天血清PCT、PTX3、HMGB-1水平;观察术后1天、3天各血清指标单一、联合检测对开放性胃肠手术患儿术后感染的预测价值;多因素Logistic回归分析术后感染的影响因素。结果 感染组术后1天、3天血清PCT、PTX3、HMGB-1水平分别为(2.42±0.39)μg/L、(3.74±0.53)μg/L,(2.07±0.66)μg/L、(3.06±0.75)μg/L,(18.35±2.74)μg/L、(26.09±4.16)μg/L,均高于未感染组的(1.71±0.35)μg/L、(2.29±0.36)μg/L,(1.48±0.52)μg/L、(1.73±0.59)μg/L,(13.04±2.26)μg/L、(15.75±2.83)μg/L,两组比较差异有统计学意义(P<0.05);绘制受试者工作特征(receiver operating characteristic, ROC)曲线显示,术后3天血清PCT、PTX3、HMGB-1联合检测预测开放性胃肠手术患儿术后感染的曲线下面积(Area under the curve, AUC)最大,为0.989;多因素Logistic回归分析显示,年龄为患儿术后感染的独立保护因素,术中出血量、手术时间、术后1天、3天血清PCT、PTX3、HMGB-1为独立危险因素(P<0.05);感染组中重度感染患儿术后1天、3天血清PCT、PTX3、HMGB-1水平分别为(2.63±0.34)μg/L、(4.12±0.56)μg/L、(2.31±0.69)μg/L、(3.39±0.81)μg/L、(19.86±2.91)μg/L、(28.84±4.40)μg/L,均高于轻度感染患儿的(2.11±0.28)μg/L、(3.19±0.49)μg/L、(1.72±0.60)μg/L、(2.58±0.73)μg/L、(16.15±2.39)μg/L、(22.09±3.96)μg/L,差异有统计学意义(P<0.05)。结论 开放性胃肠手术患儿术后血清PCT、PTX3、HMGB-1表达显著增高,且其表达与术后早期感染及感染病情程度有关,三者联合预测价值更高。
文摘Trimethylchlorosilane was used as a stereoselective reagent to determine the e or a orientation of 3-hydroxyl group of some steroids by chemical ionization mass spectrometry.
