We report the development of a head-mounted photoacoustic fiberscope for cerebral imaging in a freely behaving mouse.The 4.5-gram imaging probe has a 9-µm lateral resolution and 0.2-Hz frame rate over a 1.2-mm wi...We report the development of a head-mounted photoacoustic fiberscope for cerebral imaging in a freely behaving mouse.The 4.5-gram imaging probe has a 9-µm lateral resolution and 0.2-Hz frame rate over a 1.2-mm wide area.The probe can continuously monitor cerebral oxygenation and hemodynamic responses at single-vessel resolution,showing significantly different cerebrovascular responses to external stimuli under anesthesia and in the freely moving state.For example,when subjected to high-concentration CO_(2) respiration,enhanced oxygenation to compensate for hypercapnia can be visualized due to cerebral regulation in the freely moving state.Comparative studies exhibit significantly weakened compensation capabilities in obese rodents.This new imaging modality can be used for investigating both normal and pathological cerebrovascular functions and shows great promise for studying cerebral activity,disorders and their treatments.展开更多
Lakes are the main reservoirs of persistent organic pollutants(POPs)from land,atmo sphere and rivers.POPs in lakes undergo complex exchange,transformation,and degradation between water-air-sediment-biota interfaces,wh...Lakes are the main reservoirs of persistent organic pollutants(POPs)from land,atmo sphere and rivers.POPs in lakes undergo complex exchange,transformation,and degradation between water-air-sediment-biota interfaces,which are constrained and regulated by various physical,chemical and biological factors.POPs can affect ecological conditions,chemical properties of water and sedi ments,and biodiversity of the lake system.Therefore,it is important to study the sources,migration,transformation,environmental behavior and ecological impacts of POPs in lake ecosystems.This re view summarizes research progress on detection technologies,diversity and origins,historical records,migration and transformation,distribution patterns,degradation and toxic effects of POPs in lakes.Fi nally,future directions related to POPs in lakes were summarized.展开更多
Annexin A5 is a Ca2?-dependent phospholipidbinding protein and protein kinase C inhibitory protein. It has a potential role in cellular signal transduction, inflammation, growth and differentiation. In this study, we ...Annexin A5 is a Ca2?-dependent phospholipidbinding protein and protein kinase C inhibitory protein. It has a potential role in cellular signal transduction, inflammation, growth and differentiation. In this study, we evaluated the expression of this protein in lung tumor tissues and subsequently established a NCI-H520 cell line that stably expresses the wild-type ANXA5 gene to determine the effects of annexin A5 upregulation on the cell morphology, proliferation and metastasis potential in vitro.The effects of annexin A5 on NCI-H520 cells were tested by crystal violet staining, CCK-8 assay, scratch wound assay, and Transwell assay. The expressions of Akt,PCNA, vimentin, and E-cadherin were examined by Western blot assay. In this study, we demonstrated that annexin A5 is expressed at lower levels in tumor tissues compared with normal tissues. Additionally, the upregulation of this protein may inhibit the proliferation, migration, and invasion abilities of NCI-H520 cells in vitro. The transfected cells were arrested in the G1/S phase of the cell cycle, and the expression levels of Akt, PCNA and Vimentin were downregulated, while E-cadherin was upregulated.展开更多
目的:应用证据图方法,系统检索与梳理心肌梗死中医防治临床研究文献,了解该领域证据分布。方法:检索中国知网、万方、维普、PubMed,EMbase,Web of Science数据库,时限从2000年1月至2018年11月。纳入心肌梗死中医防治临床研究、系统评价...目的:应用证据图方法,系统检索与梳理心肌梗死中医防治临床研究文献,了解该领域证据分布。方法:检索中国知网、万方、维普、PubMed,EMbase,Web of Science数据库,时限从2000年1月至2018年11月。纳入心肌梗死中医防治临床研究、系统评价、指南与路径研究。采用文字描述结合图表分析证据分布特征。结果:纳入文献1664篇,分析了临床研究发表年度趋势、研究类型、研究规模;证候、体质临床研究;中医疗法类别及主要方案;中医防治方案的评价领域、应用调查、作用环节、干预时机、适应人群和病症;系统评价方法学质量及结论;指南与临床路径研究。结论:目前在心肌梗死中医病因及体质研究、中医非药物疗法、生命质量及情志心理疗效评价、预防作用及超早期干预(包括急救)领域研究证据较少,临床研究和系统评价质量有待提高。展开更多
基金support from the National Natural Science Foundation of China(62275104 and 62322506)L.J.acknowledges the financial support from the National Natural Science Foundation of China(62122031)+1 种基金B.-O.G.acknowledges the financial support from the National Natural Science Foundation of China(62135006 and 61860206002)the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2019BT02X105).
文摘We report the development of a head-mounted photoacoustic fiberscope for cerebral imaging in a freely behaving mouse.The 4.5-gram imaging probe has a 9-µm lateral resolution and 0.2-Hz frame rate over a 1.2-mm wide area.The probe can continuously monitor cerebral oxygenation and hemodynamic responses at single-vessel resolution,showing significantly different cerebrovascular responses to external stimuli under anesthesia and in the freely moving state.For example,when subjected to high-concentration CO_(2) respiration,enhanced oxygenation to compensate for hypercapnia can be visualized due to cerebral regulation in the freely moving state.Comparative studies exhibit significantly weakened compensation capabilities in obese rodents.This new imaging modality can be used for investigating both normal and pathological cerebrovascular functions and shows great promise for studying cerebral activity,disorders and their treatments.
基金supported by the National Natural Science Foundation of China(No.42172336).
文摘Lakes are the main reservoirs of persistent organic pollutants(POPs)from land,atmo sphere and rivers.POPs in lakes undergo complex exchange,transformation,and degradation between water-air-sediment-biota interfaces,which are constrained and regulated by various physical,chemical and biological factors.POPs can affect ecological conditions,chemical properties of water and sedi ments,and biodiversity of the lake system.Therefore,it is important to study the sources,migration,transformation,environmental behavior and ecological impacts of POPs in lake ecosystems.This re view summarizes research progress on detection technologies,diversity and origins,historical records,migration and transformation,distribution patterns,degradation and toxic effects of POPs in lakes.Fi nally,future directions related to POPs in lakes were summarized.
基金supported by the National Basic Research Program of China (2012CB967003)National Natural Science Foundation of China (81272225)+2 种基金the Research Fund for the Docoral Program of Higher Education of China (20132106110006)the Science Foundation of Liaoning Province Education Administration (L2013350)Dalian Science Foundation (2011E12SF036).
文摘Annexin A5 is a Ca2?-dependent phospholipidbinding protein and protein kinase C inhibitory protein. It has a potential role in cellular signal transduction, inflammation, growth and differentiation. In this study, we evaluated the expression of this protein in lung tumor tissues and subsequently established a NCI-H520 cell line that stably expresses the wild-type ANXA5 gene to determine the effects of annexin A5 upregulation on the cell morphology, proliferation and metastasis potential in vitro.The effects of annexin A5 on NCI-H520 cells were tested by crystal violet staining, CCK-8 assay, scratch wound assay, and Transwell assay. The expressions of Akt,PCNA, vimentin, and E-cadherin were examined by Western blot assay. In this study, we demonstrated that annexin A5 is expressed at lower levels in tumor tissues compared with normal tissues. Additionally, the upregulation of this protein may inhibit the proliferation, migration, and invasion abilities of NCI-H520 cells in vitro. The transfected cells were arrested in the G1/S phase of the cell cycle, and the expression levels of Akt, PCNA and Vimentin were downregulated, while E-cadherin was upregulated.
文摘目的:应用证据图方法,系统检索与梳理心肌梗死中医防治临床研究文献,了解该领域证据分布。方法:检索中国知网、万方、维普、PubMed,EMbase,Web of Science数据库,时限从2000年1月至2018年11月。纳入心肌梗死中医防治临床研究、系统评价、指南与路径研究。采用文字描述结合图表分析证据分布特征。结果:纳入文献1664篇,分析了临床研究发表年度趋势、研究类型、研究规模;证候、体质临床研究;中医疗法类别及主要方案;中医防治方案的评价领域、应用调查、作用环节、干预时机、适应人群和病症;系统评价方法学质量及结论;指南与临床路径研究。结论:目前在心肌梗死中医病因及体质研究、中医非药物疗法、生命质量及情志心理疗效评价、预防作用及超早期干预(包括急救)领域研究证据较少,临床研究和系统评价质量有待提高。
