背景:随着对生物活性材料的深入研究,各类生物活性材料已成为抗骨感染的重要研究手段与治疗方法。目的:通过对生物活性材料治疗骨感染的相关文献进行可视化分析,探明该领域的研究现状。方法:以中国知网与Web of Science核心合集数据库...背景:随着对生物活性材料的深入研究,各类生物活性材料已成为抗骨感染的重要研究手段与治疗方法。目的:通过对生物活性材料治疗骨感染的相关文献进行可视化分析,探明该领域的研究现状。方法:以中国知网与Web of Science核心合集数据库为检索平台,检索生物活性材料治疗骨感染的相关文献,筛选后导入CiteSpace软件,对发文量、研究机构、作者、文献共被引、关键词等进行可视化分析。结果与结论:(1)根据文献检索及筛选得出中国知网共计纳入相关文献149篇,Web of Science核心合集数据库纳入相关文献1031篇,其中中国发文量最大,美国发文量中心性最高。(2)Web of Science核心合集数据库中发文前3的机构为上海交通大学、四川大学、中国科学院,中国知网发文前3的机构为第三军医大学、昆明医科大学、南方医科大学,其中SHUAI CJ及BOCCACCINI AR两位教授发文最多,HENCH LL教授被引用最高,《Biomaterials》杂志被引用最多。(3)Web of Science核心合集数据库中关键词出现频率最高的前3位为scaffolds、in vitro、bone,中国知网中关键词出现频率最高的前3位为骨髓炎、骨缺损、骨感染,结合关键词及文献共被引分析发现,该领域的研究热点为生物材料与抗菌性能、复合材料与多功能设计以及组织工程与骨再生3个方面。展开更多
背景:人羊膜作为一种天然生物材料,因优异的生物相容性、低免疫原性和丰富的生物活性物质,在组织工程学中展现出广泛应用前景。近年来,针对人羊膜的储存、制备及在组织修复和再生医学中的研究不断深入,推动了多领域的转化与临床应用。目...背景:人羊膜作为一种天然生物材料,因优异的生物相容性、低免疫原性和丰富的生物活性物质,在组织工程学中展现出广泛应用前景。近年来,针对人羊膜的储存、制备及在组织修复和再生医学中的研究不断深入,推动了多领域的转化与临床应用。目的:综述人羊膜的储存、制备、改性及在组织工程和再生医学中的研究进展,为人羊膜的进一步开发与临床应用提供理论依据。方法:通过计算机检索中国知网、中国生物医学文献数据库、万方数据库、PubMed、Web of Science、Scopus以及Elsevier数据库,中文检索词为“人羊膜,人羊膜的储存,人羊膜的改性,人羊膜的应用,组织工程学”。英文检索词为“Human amniotic membrane,modification of human amniotic membrane,Amniotic membrane modification,Tissue engineering,Stem cells,Bioactive factors,Scaffold,Regenerative medicine”。对初步检索到的文章标题和摘要进行阅读,排除不符合要求的文章,随后根据纳入及排除标准对文章全文进行阅读,最终纳入72篇符合要求的文章。结果与结论:人羊膜具有出色的生物相容性且含有多种活性因子,通过对人羊膜储存和改性技术的不断优化,其应用形式得到进一步拓展,如支架材料、补片等应用形式,同时其力学性能、降解速率和细胞黏附能力都得到了有效提升,可为软组织修复和再生提供支持,未来应关注人羊膜与多功能材料的复合应用,深入研究人羊膜作为组织支架、补片及活性因子载体等的作用机制,进一步提升人羊膜在再生医学中的应用价值。展开更多
背景:选择合适的陶瓷材料对口腔全瓷美学修复尤为重要。在口腔修复体美学性能研究中,多使用色差值和透光性作为评价指标,影响全瓷修复体色差和透光性的因素主要有陶瓷材料的种类、色调、厚度、加工工艺以及基牙颜色和粘接剂等。目的:探...背景:选择合适的陶瓷材料对口腔全瓷美学修复尤为重要。在口腔修复体美学性能研究中,多使用色差值和透光性作为评价指标,影响全瓷修复体色差和透光性的因素主要有陶瓷材料的种类、色调、厚度、加工工艺以及基牙颜色和粘接剂等。目的:探究材料种类及厚度对全瓷修复体美学性能的影响。方法:选取各类可切削陶瓷中6种代表性的材料(常规氧化锆ZR-ST、树脂基陶瓷RC、高透氧化锆ZR-TT、白榴石增强玻璃陶瓷LE、二硅酸锂玻璃陶瓷LD及长石质瓷FP),每种材料分别制备成0.8,1.0,1.5 mm厚的10.0 mm×12.5 mm长方体陶瓷试件,进行对应的表面处理后与树脂试件(代表基牙)粘接制成陶瓷-树脂复合体试件,测算粘接前后的CIEL^(*)a^(*)b^(*)、色差值ΔE及透光率值。结果与结论:①当基牙厚度未达到无限光学厚度时,陶瓷材料的种类和厚度共同影响修复体的颜色和透光率值。当陶瓷试件厚度不超过1.0 mm时,与树脂片粘接后的颜色普遍向蓝红趋近;当陶瓷试件厚度为1.5 mm时,与树脂片粘接后的颜色普遍向蓝绿趋近,提示在全瓷修复体比色时可通过颜色预补偿优化美学匹配。②除厚度1.5 mm ZR-ST陶瓷试件外,粘接后各组陶瓷试件与树脂片之间的色差值ΔE均低于5,0.8 mm ZR-ST陶瓷试件与树脂片之间的色差值ΔE接近3,1.0 mm ZR-TT陶瓷试件与树脂片之间的色差值ΔE小于3,提示在微创修复过程中,若患牙透光率不高且美学修复空间不足、对材料强度要求高时,ZR-TT和ZR-ST陶瓷可能是潜在的选择。③陶瓷试件的透光率值在粘接后降低,并随陶瓷厚度的增加显著降低。RC陶瓷试件的透光率值高,粘接后与树脂片之间的色差值ΔE接近3,光学性能出色。展开更多
The nervous system function requires a precise but plastic neural architecture.The neuronal shape dictates how neurons interact with each other and with other cells,being the morphology of dendrites and axons the cent...The nervous system function requires a precise but plastic neural architecture.The neuronal shape dictates how neurons interact with each other and with other cells,being the morphology of dendrites and axons the central determinant of the functional properties of neurons and neural circuits.The topological and structural morphology of axons and dendrites defines and determines how synapses are conformed.The morphological diversity of axon and dendrite arborization governs the neuron’s inputs,synaptic integration,neuronal computation,signal transmission,and network circuitry,hence defining the particular connectivity and function of the different brain areas.展开更多
Background:Epidemiological studies have confirmed that longer exposure to insecticides like cypermethrin(CYP)significantly increases the risk of male reproductive toxicity.Crocus sativus L.has been recognized due to i...Background:Epidemiological studies have confirmed that longer exposure to insecticides like cypermethrin(CYP)significantly increases the risk of male reproductive toxicity.Crocus sativus L.has been recognized due to its therapeutic properties,but its exact role and molecular mechanisms in treatment of reproductive dysfunction remain unclear.Methods:During this study,36 rats were randomly divided into six groups(n=6):control,CYP-induced(60 mg/kg),standard(leuprolide 3 mg/kg)and three treatment groups receiving aqueous,ethanolic,and oil extracts(50 mg/kg or 20 mL/kg)for post-toxicity induction.Results:The finding represented that exposure of CYP significantly increased oxidative stress,disrupted testicular architecture,and markedly reduced testosterone levels(P<0.05).Importantly,Crocus sativus L.treatment alleviated these changes by increasing the expression of Nrf2(nuclear factor erythroid 2-related factor 2),restoring the activity of antioxidant enzymes,and enhancing testicular histomorphology.Surprisingly,molecular docking established a high binding affinity of Crocus sativus L.phytoconstituents such as gallic acid,cinnamic acid and quercetin to the Nrf2-Keap1 complex.It is worth noting that,Crocus sativus L.exhibited a high level of protection against reproductive toxicity caused by CYP in male rats,which was mediated by the activation of Nrf2 pathway,reduction of oxidative damage,and favorable ADMET characteristics.Conclusion:Notably,this research provides a more valid,safe,and effective method of developing new drugs for reproductive disorders,however,further investigation is needed to support the research findings and implement it in clinical practice.展开更多
In the words of the late Sir Colin Blakemore,neurologists have historically sought to infer brain functions in a manner akin to to king a hammer to a computeranalyzing localized anatomical lesions caused by trauma,tum...In the words of the late Sir Colin Blakemore,neurologists have historically sought to infer brain functions in a manner akin to to king a hammer to a computeranalyzing localized anatomical lesions caused by trauma,tumors,or strokes,noting deficits,and inferring what functions certain brain regions may be responsible for.This approach exemplifies a deletion heuristic,where the absence of a specific function reveals insights about the underlying structures or mechanisms responsible for it.By observing what is lost when a particular brain region is damaged,throughout the history of the field,neurologists have pieced together the intricate relationship between anatomy and function.展开更多
Spinal cord ischemia-reperfusion injury,a severe form of spinal cord damage,can lead to sensory and motor dysfunction.This injury often occurs after traumatic events,spinal cord surgeries,or thoracoabdominal aortic su...Spinal cord ischemia-reperfusion injury,a severe form of spinal cord damage,can lead to sensory and motor dysfunction.This injury often occurs after traumatic events,spinal cord surgeries,or thoracoabdominal aortic surgeries.The unpredictable nature of this condition,combined with limited treatment options,poses a significant burden on patients,their families,and society.Spinal cord ischemia-reperfusion injury leads to reduced neuronal regenerative capacity and complex pathological processes.In contrast,mitophagy is crucial for degrading damaged mitochondria,thereby supporting neuronal metabolism and energy supply.However,while moderate mitophagy can be beneficial in the context of spinal cord ischemia-reperfusion injury,excessive mitophagy may be detrimental.Therefore,this review aims to investigate the potential mechanisms and regulators of mitophagy involved in the pathological processes of spinal cord ischemia-reperfusion injury.The goal is to provide a comprehensive understanding of recent advancements in mitophagy related to spinal cord ischemia-reperfusion injury and clarify its potential clinical applications.展开更多
文摘背景:随着对生物活性材料的深入研究,各类生物活性材料已成为抗骨感染的重要研究手段与治疗方法。目的:通过对生物活性材料治疗骨感染的相关文献进行可视化分析,探明该领域的研究现状。方法:以中国知网与Web of Science核心合集数据库为检索平台,检索生物活性材料治疗骨感染的相关文献,筛选后导入CiteSpace软件,对发文量、研究机构、作者、文献共被引、关键词等进行可视化分析。结果与结论:(1)根据文献检索及筛选得出中国知网共计纳入相关文献149篇,Web of Science核心合集数据库纳入相关文献1031篇,其中中国发文量最大,美国发文量中心性最高。(2)Web of Science核心合集数据库中发文前3的机构为上海交通大学、四川大学、中国科学院,中国知网发文前3的机构为第三军医大学、昆明医科大学、南方医科大学,其中SHUAI CJ及BOCCACCINI AR两位教授发文最多,HENCH LL教授被引用最高,《Biomaterials》杂志被引用最多。(3)Web of Science核心合集数据库中关键词出现频率最高的前3位为scaffolds、in vitro、bone,中国知网中关键词出现频率最高的前3位为骨髓炎、骨缺损、骨感染,结合关键词及文献共被引分析发现,该领域的研究热点为生物材料与抗菌性能、复合材料与多功能设计以及组织工程与骨再生3个方面。
文摘背景:人羊膜作为一种天然生物材料,因优异的生物相容性、低免疫原性和丰富的生物活性物质,在组织工程学中展现出广泛应用前景。近年来,针对人羊膜的储存、制备及在组织修复和再生医学中的研究不断深入,推动了多领域的转化与临床应用。目的:综述人羊膜的储存、制备、改性及在组织工程和再生医学中的研究进展,为人羊膜的进一步开发与临床应用提供理论依据。方法:通过计算机检索中国知网、中国生物医学文献数据库、万方数据库、PubMed、Web of Science、Scopus以及Elsevier数据库,中文检索词为“人羊膜,人羊膜的储存,人羊膜的改性,人羊膜的应用,组织工程学”。英文检索词为“Human amniotic membrane,modification of human amniotic membrane,Amniotic membrane modification,Tissue engineering,Stem cells,Bioactive factors,Scaffold,Regenerative medicine”。对初步检索到的文章标题和摘要进行阅读,排除不符合要求的文章,随后根据纳入及排除标准对文章全文进行阅读,最终纳入72篇符合要求的文章。结果与结论:人羊膜具有出色的生物相容性且含有多种活性因子,通过对人羊膜储存和改性技术的不断优化,其应用形式得到进一步拓展,如支架材料、补片等应用形式,同时其力学性能、降解速率和细胞黏附能力都得到了有效提升,可为软组织修复和再生提供支持,未来应关注人羊膜与多功能材料的复合应用,深入研究人羊膜作为组织支架、补片及活性因子载体等的作用机制,进一步提升人羊膜在再生医学中的应用价值。
文摘背景:选择合适的陶瓷材料对口腔全瓷美学修复尤为重要。在口腔修复体美学性能研究中,多使用色差值和透光性作为评价指标,影响全瓷修复体色差和透光性的因素主要有陶瓷材料的种类、色调、厚度、加工工艺以及基牙颜色和粘接剂等。目的:探究材料种类及厚度对全瓷修复体美学性能的影响。方法:选取各类可切削陶瓷中6种代表性的材料(常规氧化锆ZR-ST、树脂基陶瓷RC、高透氧化锆ZR-TT、白榴石增强玻璃陶瓷LE、二硅酸锂玻璃陶瓷LD及长石质瓷FP),每种材料分别制备成0.8,1.0,1.5 mm厚的10.0 mm×12.5 mm长方体陶瓷试件,进行对应的表面处理后与树脂试件(代表基牙)粘接制成陶瓷-树脂复合体试件,测算粘接前后的CIEL^(*)a^(*)b^(*)、色差值ΔE及透光率值。结果与结论:①当基牙厚度未达到无限光学厚度时,陶瓷材料的种类和厚度共同影响修复体的颜色和透光率值。当陶瓷试件厚度不超过1.0 mm时,与树脂片粘接后的颜色普遍向蓝红趋近;当陶瓷试件厚度为1.5 mm时,与树脂片粘接后的颜色普遍向蓝绿趋近,提示在全瓷修复体比色时可通过颜色预补偿优化美学匹配。②除厚度1.5 mm ZR-ST陶瓷试件外,粘接后各组陶瓷试件与树脂片之间的色差值ΔE均低于5,0.8 mm ZR-ST陶瓷试件与树脂片之间的色差值ΔE接近3,1.0 mm ZR-TT陶瓷试件与树脂片之间的色差值ΔE小于3,提示在微创修复过程中,若患牙透光率不高且美学修复空间不足、对材料强度要求高时,ZR-TT和ZR-ST陶瓷可能是潜在的选择。③陶瓷试件的透光率值在粘接后降低,并随陶瓷厚度的增加显著降低。RC陶瓷试件的透光率值高,粘接后与树脂片之间的色差值ΔE接近3,光学性能出色。
基金supported by the Wellcome Trust(grant No.103852).
文摘The nervous system function requires a precise but plastic neural architecture.The neuronal shape dictates how neurons interact with each other and with other cells,being the morphology of dendrites and axons the central determinant of the functional properties of neurons and neural circuits.The topological and structural morphology of axons and dendrites defines and determines how synapses are conformed.The morphological diversity of axon and dendrite arborization governs the neuron’s inputs,synaptic integration,neuronal computation,signal transmission,and network circuitry,hence defining the particular connectivity and function of the different brain areas.
文摘Background:Epidemiological studies have confirmed that longer exposure to insecticides like cypermethrin(CYP)significantly increases the risk of male reproductive toxicity.Crocus sativus L.has been recognized due to its therapeutic properties,but its exact role and molecular mechanisms in treatment of reproductive dysfunction remain unclear.Methods:During this study,36 rats were randomly divided into six groups(n=6):control,CYP-induced(60 mg/kg),standard(leuprolide 3 mg/kg)and three treatment groups receiving aqueous,ethanolic,and oil extracts(50 mg/kg or 20 mL/kg)for post-toxicity induction.Results:The finding represented that exposure of CYP significantly increased oxidative stress,disrupted testicular architecture,and markedly reduced testosterone levels(P<0.05).Importantly,Crocus sativus L.treatment alleviated these changes by increasing the expression of Nrf2(nuclear factor erythroid 2-related factor 2),restoring the activity of antioxidant enzymes,and enhancing testicular histomorphology.Surprisingly,molecular docking established a high binding affinity of Crocus sativus L.phytoconstituents such as gallic acid,cinnamic acid and quercetin to the Nrf2-Keap1 complex.It is worth noting that,Crocus sativus L.exhibited a high level of protection against reproductive toxicity caused by CYP in male rats,which was mediated by the activation of Nrf2 pathway,reduction of oxidative damage,and favorable ADMET characteristics.Conclusion:Notably,this research provides a more valid,safe,and effective method of developing new drugs for reproductive disorders,however,further investigation is needed to support the research findings and implement it in clinical practice.
文摘In the words of the late Sir Colin Blakemore,neurologists have historically sought to infer brain functions in a manner akin to to king a hammer to a computeranalyzing localized anatomical lesions caused by trauma,tumors,or strokes,noting deficits,and inferring what functions certain brain regions may be responsible for.This approach exemplifies a deletion heuristic,where the absence of a specific function reveals insights about the underlying structures or mechanisms responsible for it.By observing what is lost when a particular brain region is damaged,throughout the history of the field,neurologists have pieced together the intricate relationship between anatomy and function.
基金supported by Cuiying Scientific and Technological Innovation Program of Second Hospital of Lanzhou University,Nos.CY2023-QN-B18(to YD),2020QN-16(to YZ)the Natural Science Foundation of Gansu Province,No.22JR11RA082(to YZ)Key R&D Plan of Gansu Provincial Department of Science and Technology-Social Development Projects,No.23YFFA0043(to XK).
文摘Spinal cord ischemia-reperfusion injury,a severe form of spinal cord damage,can lead to sensory and motor dysfunction.This injury often occurs after traumatic events,spinal cord surgeries,or thoracoabdominal aortic surgeries.The unpredictable nature of this condition,combined with limited treatment options,poses a significant burden on patients,their families,and society.Spinal cord ischemia-reperfusion injury leads to reduced neuronal regenerative capacity and complex pathological processes.In contrast,mitophagy is crucial for degrading damaged mitochondria,thereby supporting neuronal metabolism and energy supply.However,while moderate mitophagy can be beneficial in the context of spinal cord ischemia-reperfusion injury,excessive mitophagy may be detrimental.Therefore,this review aims to investigate the potential mechanisms and regulators of mitophagy involved in the pathological processes of spinal cord ischemia-reperfusion injury.The goal is to provide a comprehensive understanding of recent advancements in mitophagy related to spinal cord ischemia-reperfusion injury and clarify its potential clinical applications.
