Hepatic fibrosis is regulated by the synergistic actions of various cells and cytokines,with the activation and proliferation of hepatic stellate cells(HSCs) being considered the central event in this process.To achie...Hepatic fibrosis is regulated by the synergistic actions of various cells and cytokines,with the activation and proliferation of hepatic stellate cells(HSCs) being considered the central event in this process.To achieve specific targeting of activated hepatic stellate cells(a HSCs) and precise treatment of hepatic fibrosis,this study developed a dual-functional drug delivery system(SIL/c RGD-PEG-PPS PMs) with both targeting and responsive release capabilities.It aims to target the αvβ 3 receptor specifically expressed on the surface of a HSCs using the cyclic peptide c(RGDyk),and to exploit the high reactive oxygen species(ROS) level in the cellular microenvironment to achieve concentrated burst release of drugs at the pathological sites of hepatic fibrosis.Based on multiple assessments,SIL/c RGD-PEG-PPS PMs specifically enhanced the targeted delivery of silybin(SIL) to a HSCs,inhibited the proliferation and migration of a HSCs,and exhibited good biosafety.Additionally,it demonstrated excellent anti-fibrotic activity in fibrotic mice.In summary,this study shows great potential in targeted treatment of hepatic fibrosis and provides a multifunctional tool for advancing the research and therapeutic strategies of hepatic fibrosis.展开更多
Heat stress has become the leading abiotic constraint on crop productivity and yield stability,highlighting the urgent need for strategic advances in this field.Most heat-tolerance studies rely on short-term greenhous...Heat stress has become the leading abiotic constraint on crop productivity and yield stability,highlighting the urgent need for strategic advances in this field.Most heat-tolerance studies rely on short-term greenhouse tests that fail to capture the fluctuating field environment,often leading to inconsistencies between laboratory and field performance[1].Screening in natural field environments,which captures fluctuations in light and temperature,day-night differences,and plant-plant competition,provides more meaningful data for breeding applications[2].展开更多
Although reactive oxygen species(ROS)-based antibiofilm therapy has emerged as a promising nonantibiotic approach,its therapeutic efficacy remains limited by the short lifetime and restricted diffusion of ROS as well ...Although reactive oxygen species(ROS)-based antibiofilm therapy has emerged as a promising nonantibiotic approach,its therapeutic efficacy remains limited by the short lifetime and restricted diffusion of ROS as well as the intrinsic barriers of biofilms.Here,we designed a bacteria-targeted piezoelectric heterostructure(U-B/F)composed of boronic acid-functionalized UiO-66(Hf)(U-B)and carboxylated fullerene(C70-COOH)for synergistic biofilm eradication.The boronic acid groups enabled selective bacterial binding,while the ultrasound(US)-activated Z-scheme heterojunction strengthened the piezoelectric response and enhanced charge separation,thereby amplifying sonocatalytic ROS generation.In parallel,fullerene acted as a peroxidase-mimetic catalyst,converting endogenous H2O2 into highly cytotoxic hydroxyl radical(·OH).Beyond ROS pathways,the favorable band alignment allowed US-induced electron transfer from bacteria to U-B/F,thereby interfering with bacterial electron transport and energy metabolism.Transcriptomic profiling revealed molecular signatures of bioenergetic collapse and oxidative stress.Functionally,this strategy achieved 99.99%elimination of planktonic methicillin-resistant Staphylococcus aureus(MRSA)and 92.41%removal of mature biofilms in vitro.In MRSA-infected diabetic mice,U-B/F under US irradiation significantly accelerated wound healing by eradicating infection,alleviating inflammation,and promoting tissue regeneration.Overall,this work provides a rational strategy for designing multifunctional nanomaterials that integrate bacterial targeting,dual ROS catalysis,and US-induced electron transfer interference to combat biofilm-associated infections.展开更多
Acute myocardial infarction(MI)claims millions of lives worldwide annually and remains the primary driver of chronic heart failure(HF).A hallmark of MI-induced cardiac damage is the extensive death of cardiomyocytes(C...Acute myocardial infarction(MI)claims millions of lives worldwide annually and remains the primary driver of chronic heart failure(HF).A hallmark of MI-induced cardiac damage is the extensive death of cardiomyocytes(CMs).Cardiac injury triggers massive mitochondriaderived reactive oxygen species(ROS),which directly or indirectly induce CM death,thereby contributing to cardiac damage during the acute phase of ischemiareperfusion(I/R)injury and the chronic myocardial remodeling process after MI[1].Consequently,inhibiting excessive mitochondrial ROS generation during cardiac injury has been suggested as an effective strategy to mitigate CM death and improve post-MI cardiac function.However,the lack of pharmacological agents capable of specifically inhibiting mitochondrial ROS generation in damaged hearts highlightsanurgentclinical need.展开更多
Cellular senescence plays a crucial role in respiratory diseases.Nitrogen dioxide(NO2),a major air pollutant,causes multi-system toxicity,primarily affecting the respiratory system.However,the association between N...Cellular senescence plays a crucial role in respiratory diseases.Nitrogen dioxide(NO2),a major air pollutant,causes multi-system toxicity,primarily affecting the respiratory system.However,the association between NO2and pulmonary senescence remains unclear.This study systematically explored the association between NO2exposure and premature pulmonary senescence using animal and cellular models.Rats were exposed for 45 days(4 h/day)to filtered air,0.5 ppmV,or 5.0 ppmV NO2.Human bronchial epithelial(HBE)cells were treated with 0 or 120μmol/L NaNO3,a stable metabolite of NO2,for 96 h.HBE cells exhibited hallmark senescence phenotypes,including elevated reactive oxygen species(ROS),increased expression of senescence-associated proteins(Fibronectin 1(Fn1),Clusterin(CLU),senescence Marker Protein 30(SMP30)),elevated β-galactosidase(β-gal)activity,increased developmentally regulated GTP-binding protein 1(DRG1)and cyclin-dependent protein kinase 5(CDK5)expression,and G1-phase cell cycle arrest.Treatment with the ROS inhibitor N-acetylcysteine(NAC),si-DRG1,or a CDK5 inhibitor alleviated these effects.Co-immunoprecipitation assays revealed that NaNO3promoted the interaction between DRG1 and CDK5 during senescence.The study demonstrated that NO2/NaNO3induces bronchial epithelial cellular senescence,contributing to pulmonary senescence via ROS-dependent upregulation of DRG1 and CDK5 expression and interaction.Targeting the ROS-DRG1/CDK5 axis may represent a therapeutic strategy for environmental pollutant-induced premature respiratory senescence and provide new insights for the management of related disorders.展开更多
视觉同步定位与建图(simultaneous localization and mapping,SLAM)是实现移动机器人自主定位并构建环境地图的关键环节。SLAM技术虽能精确重建环境几何结构,却难以为机器人提供执行复杂任务所需的语义理解能力;建筑信息模型(building i...视觉同步定位与建图(simultaneous localization and mapping,SLAM)是实现移动机器人自主定位并构建环境地图的关键环节。SLAM技术虽能精确重建环境几何结构,却难以为机器人提供执行复杂任务所需的语义理解能力;建筑信息模型(building information model,BIM)包含丰富的建筑信息,但与机器人操作系统(robot operating system,ROS)之间存在显著的数据格式和表达方式差异,且现有研究多采用人工方式进行转换,效率低下难以规模化应用,且室内环境并非静态不变,从而会影响机器人的导航决策。因此,提出一种集成BIM数据的ROS室内语义地图构建与动态更新方法。通过研发工业基础类(industry foundation classes,IFC)到统一机器人描述格式(unified robot description format,URDF)自动转换器,实现从BIM到机器人仿真环境的自动化建模;融合YOLOv8与随机采样一致性(random sample consensus,RANSAC)算法,建立视觉驱动的语义地图动态更新机制。结果表明,静态建筑元素还原准确率达98%以上,动态物体识别精度达0.9以上,显著提升了语义地图的自动化程度、知识丰富度及环境适应性。展开更多
基金supported by the financial assistance from Natural Science Fund Project of Science and Technology Department of Jilin Province (Nos.YDZJ202301ZYTS141,YDZJ202501ZYTS793)。
摘要Hepatic fibrosis is regulated by the synergistic actions of various cells and cytokines,with the activation and proliferation of hepatic stellate cells(HSCs) being considered the central event in this process.To achieve specific targeting of activated hepatic stellate cells(a HSCs) and precise treatment of hepatic fibrosis,this study developed a dual-functional drug delivery system(SIL/c RGD-PEG-PPS PMs) with both targeting and responsive release capabilities.It aims to target the αvβ 3 receptor specifically expressed on the surface of a HSCs using the cyclic peptide c(RGDyk),and to exploit the high reactive oxygen species(ROS) level in the cellular microenvironment to achieve concentrated burst release of drugs at the pathological sites of hepatic fibrosis.Based on multiple assessments,SIL/c RGD-PEG-PPS PMs specifically enhanced the targeted delivery of silybin(SIL) to a HSCs,inhibited the proliferation and migration of a HSCs,and exhibited good biosafety.Additionally,it demonstrated excellent anti-fibrotic activity in fibrotic mice.In summary,this study shows great potential in targeted treatment of hepatic fibrosis and provides a multifunctional tool for advancing the research and therapeutic strategies of hepatic fibrosis.
基金supported by the National Natural Science Foundation of China(32188102,32072048,and U2004204)National Key Research and Development Program of China(2023YFF1001200)+6 种基金Hainan Province Key Research and Development Program(ZDYF2024HXGG005)Biological Breeding-National Science and Technology Major Project(2024ZD04077)The Innovation Platform for Academicians of Hainan Province(YSPTZX2502)The Agricultural science and Technology Innovation Program(ASTIP)Academician Workstation of National Nanfan Research Institute(Sanya)CAAS(YBXM2526 and YBXM2527)The support from the Ministry of Agriculture and Rural Affairs of the People’s Republic of China.
摘要Heat stress has become the leading abiotic constraint on crop productivity and yield stability,highlighting the urgent need for strategic advances in this field.Most heat-tolerance studies rely on short-term greenhouse tests that fail to capture the fluctuating field environment,often leading to inconsistencies between laboratory and field performance[1].Screening in natural field environments,which captures fluctuations in light and temperature,day-night differences,and plant-plant competition,provides more meaningful data for breeding applications[2].
基金supported by the National Natural Science Foundation of China(22090050,22176180)the Fundamental Research Funds for the Central Universities(CZQ23039)the Fund for Scientific Research Platforms of South-Central Minzu University(PTZ25012)。
摘要Although reactive oxygen species(ROS)-based antibiofilm therapy has emerged as a promising nonantibiotic approach,its therapeutic efficacy remains limited by the short lifetime and restricted diffusion of ROS as well as the intrinsic barriers of biofilms.Here,we designed a bacteria-targeted piezoelectric heterostructure(U-B/F)composed of boronic acid-functionalized UiO-66(Hf)(U-B)and carboxylated fullerene(C70-COOH)for synergistic biofilm eradication.The boronic acid groups enabled selective bacterial binding,while the ultrasound(US)-activated Z-scheme heterojunction strengthened the piezoelectric response and enhanced charge separation,thereby amplifying sonocatalytic ROS generation.In parallel,fullerene acted as a peroxidase-mimetic catalyst,converting endogenous H2O2 into highly cytotoxic hydroxyl radical(·OH).Beyond ROS pathways,the favorable band alignment allowed US-induced electron transfer from bacteria to U-B/F,thereby interfering with bacterial electron transport and energy metabolism.Transcriptomic profiling revealed molecular signatures of bioenergetic collapse and oxidative stress.Functionally,this strategy achieved 99.99%elimination of planktonic methicillin-resistant Staphylococcus aureus(MRSA)and 92.41%removal of mature biofilms in vitro.In MRSA-infected diabetic mice,U-B/F under US irradiation significantly accelerated wound healing by eradicating infection,alleviating inflammation,and promoting tissue regeneration.Overall,this work provides a rational strategy for designing multifunctional nanomaterials that integrate bacterial targeting,dual ROS catalysis,and US-induced electron transfer interference to combat biofilm-associated infections.
基金supported by grants from the National Natural Science Foundation of China(No.82400542)the Hunan Provincial Natural Science Foundation of China(Nos.2024JJ5347 and 2025JJ50502)+2 种基金the Health Research Project of Hunan Provincial Health Commission(No.W20243007)the Research Foundation of Education Bureau of Hunan Province(No.22B0415)the Undergraduate Research and Innovation Project of University of South China(Nos.S202410555041 and S202510555236).
摘要Acute myocardial infarction(MI)claims millions of lives worldwide annually and remains the primary driver of chronic heart failure(HF).A hallmark of MI-induced cardiac damage is the extensive death of cardiomyocytes(CMs).Cardiac injury triggers massive mitochondriaderived reactive oxygen species(ROS),which directly or indirectly induce CM death,thereby contributing to cardiac damage during the acute phase of ischemiareperfusion(I/R)injury and the chronic myocardial remodeling process after MI[1].Consequently,inhibiting excessive mitochondrial ROS generation during cardiac injury has been suggested as an effective strategy to mitigate CM death and improve post-MI cardiac function.However,the lack of pharmacological agents capable of specifically inhibiting mitochondrial ROS generation in damaged hearts highlightsanurgentclinical need.
基金supported by Hunan Provincial Natural Science Foundation for Distinguished Young Scholars(No.2024JJ2082)the National Natural Science Foundation of China(No.42277438)the Postgraduate Independent Exploration and Innovation Project of Hunan Province,China(No.CX20230121).
摘要Cellular senescence plays a crucial role in respiratory diseases.Nitrogen dioxide(NO2),a major air pollutant,causes multi-system toxicity,primarily affecting the respiratory system.However,the association between NO2and pulmonary senescence remains unclear.This study systematically explored the association between NO2exposure and premature pulmonary senescence using animal and cellular models.Rats were exposed for 45 days(4 h/day)to filtered air,0.5 ppmV,or 5.0 ppmV NO2.Human bronchial epithelial(HBE)cells were treated with 0 or 120μmol/L NaNO3,a stable metabolite of NO2,for 96 h.HBE cells exhibited hallmark senescence phenotypes,including elevated reactive oxygen species(ROS),increased expression of senescence-associated proteins(Fibronectin 1(Fn1),Clusterin(CLU),senescence Marker Protein 30(SMP30)),elevated β-galactosidase(β-gal)activity,increased developmentally regulated GTP-binding protein 1(DRG1)and cyclin-dependent protein kinase 5(CDK5)expression,and G1-phase cell cycle arrest.Treatment with the ROS inhibitor N-acetylcysteine(NAC),si-DRG1,or a CDK5 inhibitor alleviated these effects.Co-immunoprecipitation assays revealed that NaNO3promoted the interaction between DRG1 and CDK5 during senescence.The study demonstrated that NO2/NaNO3induces bronchial epithelial cellular senescence,contributing to pulmonary senescence via ROS-dependent upregulation of DRG1 and CDK5 expression and interaction.Targeting the ROS-DRG1/CDK5 axis may represent a therapeutic strategy for environmental pollutant-induced premature respiratory senescence and provide new insights for the management of related disorders.
摘要视觉同步定位与建图(simultaneous localization and mapping,SLAM)是实现移动机器人自主定位并构建环境地图的关键环节。SLAM技术虽能精确重建环境几何结构,却难以为机器人提供执行复杂任务所需的语义理解能力;建筑信息模型(building information model,BIM)包含丰富的建筑信息,但与机器人操作系统(robot operating system,ROS)之间存在显著的数据格式和表达方式差异,且现有研究多采用人工方式进行转换,效率低下难以规模化应用,且室内环境并非静态不变,从而会影响机器人的导航决策。因此,提出一种集成BIM数据的ROS室内语义地图构建与动态更新方法。通过研发工业基础类(industry foundation classes,IFC)到统一机器人描述格式(unified robot description format,URDF)自动转换器,实现从BIM到机器人仿真环境的自动化建模;融合YOLOv8与随机采样一致性(random sample consensus,RANSAC)算法,建立视觉驱动的语义地图动态更新机制。结果表明,静态建筑元素还原准确率达98%以上,动态物体识别精度达0.9以上,显著提升了语义地图的自动化程度、知识丰富度及环境适应性。