The mitochondrial permeability transition pore is a nonspecific transmembrane channel.Inhibition of mitochondrial permeability transition pore opening has been shown to alleviate mitochondrial swelling,calcium overloa...The mitochondrial permeability transition pore is a nonspecific transmembrane channel.Inhibition of mitochondrial permeability transition pore opening has been shown to alleviate mitochondrial swelling,calcium overload,and axonal degeneration.Cyclophilin D is an important component of the mitochondrial permeability transition pore.Whether cyclophilin D participates in mitochondrial impairment and axonal injury after intracerebral hemorrhage is not clear.In this study,we established mouse models of intracerebral hemorrhage in vivo by injection of autologous blood and oxyhemoglobin into the striatum in Thy1-YFP mice,in which pyramidal neurons and axons express yellow fluorescent protein.We also simulated intracerebral hemorrhage in vitro in PC12 cells using oxyhemoglobin.We found that axonal degeneration in the early stage of intracerebral hemorrhage depended on mitochondrial swelling induced by cyclophilin D activation and mitochondrial permeability transition pore opening.We further investigated the mechanism underlying the role of cyclophilin D in mouse models and PC12 cell models of intracerebral hemorrhage.We found that both cyclosporin A inhibition and short hairpin RNA interference of cyclophilin D reduced mitochondrial permeability transition pore opening and mitochondrial injury.In addition,inhibition of cyclophilin D and mitochondrial permeability transition pore opening protected corticospinal tract integrity and alleviated motor dysfunction caused by intracerebral hemorrhage.Our findings suggest that cyclophilin D is used as a key mediator of axonal degeneration after intracerebral hemorrhage;inhibition of cyclophilin D expression can protect mitochondrial structure and function and further alleviate corticospinal tract injury and motor dysfunction after intracerebral hemorrhage.Our findings provide a therapeutic target for preventing axonal degeneration of white matter injury and subsequent functional impairment in central nervous diseases.展开更多
智能电网的正常运行依赖于准确反映电网物理特性的状态估计。针对虚假数据注入攻击(False Data Injection Attack,FDIA)通过向电力系统量测单元注入恶意数据来篡改状态估计结果的问题,提出了一种基于最大似然估计(Maximum Likelihood Es...智能电网的正常运行依赖于准确反映电网物理特性的状态估计。针对虚假数据注入攻击(False Data Injection Attack,FDIA)通过向电力系统量测单元注入恶意数据来篡改状态估计结果的问题,提出了一种基于最大似然估计(Maximum Likelihood Estimation,MLE)的电网FDIA检测方法,并以此提高状态估计结果的精度。首先,基于智能电网量测向量与FDIA攻击向量服从具有不同协方差多元高斯分布的特点,通过MLE计算法求得量测数据期望与协方差,根据该协方差判断是否存在虚假量测数据。其次,若数据正常,通过加权最小二乘(Weighted Least Square,WLS)算法依据该量测数据期望进行状态估计可以得到更加优秀的系统状态结果。最后,基于IEEE-14节点系统的算例证明了该算法的可行性。展开更多
After being ingested and entering the human stomach,Helicobacter pylori(H.pylori)adopts several effective strategies to adhere to and colonize the gastric mucosa and move to different regions of the stomach to obtain ...After being ingested and entering the human stomach,Helicobacter pylori(H.pylori)adopts several effective strategies to adhere to and colonize the gastric mucosa and move to different regions of the stomach to obtain more nutrients and escape from the harsher environments of the stomach,leading to acute infection and chronic gastritis,which is the basis of malignant gastric tumors.The endoscopic manifestations and pathological features of H.pylori infection are diverse and vary with the duration of infection.In this review,we describe the endoscopic manifestations of each stage of H.pylori gastritis and then reveal the potential mechanisms of bacterial intragastric colonization and migration from the perspective of endoscopists to provide direction for future research on the effective therapy and management of H.pylori infection.展开更多
To investigate the role of nutrients intake during pregnancy with longitudinal development of rhinitis,asthma,eczema,wheeze,and food allergy in offspring.The PubMed,Embase,and Cochrane library were searched for articl...To investigate the role of nutrients intake during pregnancy with longitudinal development of rhinitis,asthma,eczema,wheeze,and food allergy in offspring.The PubMed,Embase,and Cochrane library were searched for articles published throughout May 2022.The pooled effect estimate were presented using relative risk and calculated by the random-effects model.Twenty-three prospective cohort studies enrolling 210817 individuals were included.The risk of wheeze in offspring were lowered when high vitamin D,vitamin E,zinc,and milk intakes during pregnancy,whereas high meat intake during pregnancy could induce additional risk of wheeze in offspring.Moreover,highβ-carotene and magnesium intakes during pregnancy were related to lower eczema risk in offspring,whereas eczema risk in offspring was increased for pregnant women with high intake of butter and margarine.Finally,the asthma risk in offspring could protect against for pregnant women with high intake of vitamin D and apple,whereas high folic acid during pregnancy could produce excess asthma risk in offspring.This study provides the summary evidences regarding the role of nutrients intake during pregnancy and subsequent risk of rhinitis,asthma,eczema,wheeze,and food allergy,and further effective intervention strategies should be employed to improve childhood allergic diseases.展开更多
Jet precession has previously been proposed to explain the apparently repeating features in the light curves of a few gamma-ray bursts(GRBs).In this paper,we further apply the precession model to a bright GRB 220408B ...Jet precession has previously been proposed to explain the apparently repeating features in the light curves of a few gamma-ray bursts(GRBs).In this paper,we further apply the precession model to a bright GRB 220408B by examining both its temporal and spectral consistency with the predictions of the model.As one of the recently confirmed GRBs observed by our GRID CubeSat mission,GRB 220408B is noteworthy as it exhibits three apparently similar emission episodes.Furthermore,the similarities are reinforced by their strong temporal correlations and similar features in terms of spectral evolution and spectral lags.Our analysis demonstrates that these features can be well explained by the modulated emission of a Fast-Rise-Exponential-Decay(FRED)shape light curve intrinsically produced by a precessing jet with a precession period of 18.4_(-0.2)~(+0.2)s,a nutation period of11.1_(-0.2)~(+0.2)s and viewed off-axis.This study provides a straightforward explanation for the complex yet similar multiepisode GRB light curves.展开更多
基金supported by the National Natural Science Foundation of China,Nos.81901267(to YY),82001263(to WXC),81901193(to HLZ)a grant from State Key Laboratory of Trauma,Burn and Combined Injury,No.SKLYQ202002(to YJC)+1 种基金a grant from Wuxi Municipal Health Commission No.2020ZHYB19(to YY)a grant from Wuxi Science and Technology Bureau,No.Y20212045(to LKY)。
文摘The mitochondrial permeability transition pore is a nonspecific transmembrane channel.Inhibition of mitochondrial permeability transition pore opening has been shown to alleviate mitochondrial swelling,calcium overload,and axonal degeneration.Cyclophilin D is an important component of the mitochondrial permeability transition pore.Whether cyclophilin D participates in mitochondrial impairment and axonal injury after intracerebral hemorrhage is not clear.In this study,we established mouse models of intracerebral hemorrhage in vivo by injection of autologous blood and oxyhemoglobin into the striatum in Thy1-YFP mice,in which pyramidal neurons and axons express yellow fluorescent protein.We also simulated intracerebral hemorrhage in vitro in PC12 cells using oxyhemoglobin.We found that axonal degeneration in the early stage of intracerebral hemorrhage depended on mitochondrial swelling induced by cyclophilin D activation and mitochondrial permeability transition pore opening.We further investigated the mechanism underlying the role of cyclophilin D in mouse models and PC12 cell models of intracerebral hemorrhage.We found that both cyclosporin A inhibition and short hairpin RNA interference of cyclophilin D reduced mitochondrial permeability transition pore opening and mitochondrial injury.In addition,inhibition of cyclophilin D and mitochondrial permeability transition pore opening protected corticospinal tract integrity and alleviated motor dysfunction caused by intracerebral hemorrhage.Our findings suggest that cyclophilin D is used as a key mediator of axonal degeneration after intracerebral hemorrhage;inhibition of cyclophilin D expression can protect mitochondrial structure and function and further alleviate corticospinal tract injury and motor dysfunction after intracerebral hemorrhage.Our findings provide a therapeutic target for preventing axonal degeneration of white matter injury and subsequent functional impairment in central nervous diseases.
文摘智能电网的正常运行依赖于准确反映电网物理特性的状态估计。针对虚假数据注入攻击(False Data Injection Attack,FDIA)通过向电力系统量测单元注入恶意数据来篡改状态估计结果的问题,提出了一种基于最大似然估计(Maximum Likelihood Estimation,MLE)的电网FDIA检测方法,并以此提高状态估计结果的精度。首先,基于智能电网量测向量与FDIA攻击向量服从具有不同协方差多元高斯分布的特点,通过MLE计算法求得量测数据期望与协方差,根据该协方差判断是否存在虚假量测数据。其次,若数据正常,通过加权最小二乘(Weighted Least Square,WLS)算法依据该量测数据期望进行状态估计可以得到更加优秀的系统状态结果。最后,基于IEEE-14节点系统的算例证明了该算法的可行性。
基金Medical Health Science and Technology Development Plan Project of Shandong Province,No.202103030765Natural Science Foundation of Shandong Province,No.ZR2021QH195 and No.ZR2020QH035.
文摘After being ingested and entering the human stomach,Helicobacter pylori(H.pylori)adopts several effective strategies to adhere to and colonize the gastric mucosa and move to different regions of the stomach to obtain more nutrients and escape from the harsher environments of the stomach,leading to acute infection and chronic gastritis,which is the basis of malignant gastric tumors.The endoscopic manifestations and pathological features of H.pylori infection are diverse and vary with the duration of infection.In this review,we describe the endoscopic manifestations of each stage of H.pylori gastritis and then reveal the potential mechanisms of bacterial intragastric colonization and migration from the perspective of endoscopists to provide direction for future research on the effective therapy and management of H.pylori infection.
基金supported by CAMS Innovation Fund for Medical Science(CIFMS 2019-I2M-5-024)。
文摘To investigate the role of nutrients intake during pregnancy with longitudinal development of rhinitis,asthma,eczema,wheeze,and food allergy in offspring.The PubMed,Embase,and Cochrane library were searched for articles published throughout May 2022.The pooled effect estimate were presented using relative risk and calculated by the random-effects model.Twenty-three prospective cohort studies enrolling 210817 individuals were included.The risk of wheeze in offspring were lowered when high vitamin D,vitamin E,zinc,and milk intakes during pregnancy,whereas high meat intake during pregnancy could induce additional risk of wheeze in offspring.Moreover,highβ-carotene and magnesium intakes during pregnancy were related to lower eczema risk in offspring,whereas eczema risk in offspring was increased for pregnant women with high intake of butter and margarine.Finally,the asthma risk in offspring could protect against for pregnant women with high intake of vitamin D and apple,whereas high folic acid during pregnancy could produce excess asthma risk in offspring.This study provides the summary evidences regarding the role of nutrients intake during pregnancy and subsequent risk of rhinitis,asthma,eczema,wheeze,and food allergy,and further effective intervention strategies should be employed to improve childhood allergic diseases.
基金support by the National Key Research and Development Programs of China(2022YFF0711404,2022SKA0130102)the National SKA Program of China(2022SKA0130100)+4 种基金the National Natural Science Foundation of China(grant Nos.11833003,U2038105,U1831135,12121003)the science research grants from the China Manned Space Project with NO.CMS-CSST-2021-B11the Fundamental Research Funds for the Central Universitiesthe Program for Innovative Talents and Entrepreneur in Jiangsusupported by the National Postdoctoral Program for Innovative Talents(grant No.BX20200164)。
文摘Jet precession has previously been proposed to explain the apparently repeating features in the light curves of a few gamma-ray bursts(GRBs).In this paper,we further apply the precession model to a bright GRB 220408B by examining both its temporal and spectral consistency with the predictions of the model.As one of the recently confirmed GRBs observed by our GRID CubeSat mission,GRB 220408B is noteworthy as it exhibits three apparently similar emission episodes.Furthermore,the similarities are reinforced by their strong temporal correlations and similar features in terms of spectral evolution and spectral lags.Our analysis demonstrates that these features can be well explained by the modulated emission of a Fast-Rise-Exponential-Decay(FRED)shape light curve intrinsically produced by a precessing jet with a precession period of 18.4_(-0.2)~(+0.2)s,a nutation period of11.1_(-0.2)~(+0.2)s and viewed off-axis.This study provides a straightforward explanation for the complex yet similar multiepisode GRB light curves.