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Silk-based nerve guidance conduits with macroscopic holes modulate the vascularization of regenerating rat sciatic nerve

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Neural Regeneration Research 2025年第6期20卷 1789-1800页

作者： Carina Hromada Patrick Heimel Markus Kerbl lászlóGál Sylvia Nürnberger Barbara Schaedl James Ferguson nicole Swiadek Xavier Monforte Johannes C.Heinzel Antal Nógrádi Andreas H.Teuschl-Woller David Hercher Department life Science Engineering University of Applied Sciences Technikum WienViennaAustria Austrian Cluster for Tissue Regeneration ViennaAustria ludwig Boltzmann Institute for Traumatology The Research Center in Cooperation with AUVAViennaAustria University Clinic of Dentistry Medical University of ViennaViennaAustria Department of Plastic Reconstructive and Aesthetic SurgeryLandesklinikum Wiener Neustadt2700 Wiener NeustadtAustria Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary Medical University of Vienna Department of Orthopedics and Trauma SurgeryDevision of Trauma SurgeryViennaAustria Department of Hand- PlasticReconstructive and Burn SurgeryBG Unfallklinik TuebingenUniversity of TuebingenTuebingenGermany

Peripheral nerve injuries induce a severe motor and sensory deficit. Since the availability of autologous nerve transplants for nerve repair is very limited, alternative treatment strategies are sought, including the use of tubular nerve guidance conduits(tNGCs). However, the use of tNGCs results in poor functional recovery and central necrosis of the regenerating tissue, which limits their application to short nerve lesion defects(typically shorter than 3 cm). Given the importance of vascularization in nerve regeneration, we hypothesized that enabling the growth of blood vessels from the surrounding tissue into the regenerating nerve within the tNGC would help eliminate necrotic processes and lead to improved regeneration. In this study, we reported the application of macroscopic holes into the tubular walls of silk-based tNGCs and compared the various features of these improved silk^(+) tNGCs with the tubes without holes(silk^(–) tNGCs) and autologous nerve transplants in an 8-mm sciatic nerve defect in rats. Using a combination of micro-computed tomography and histological analyses, we were able to prove that the use of silk^(+) tNGCs induced the growth of blood vessels from the adjacent tissue to the intraluminal neovascular formation. A significantly higher number of blood vessels in the silk^(+) group was found compared with autologous nerve transplants and silk^(–), accompanied by improved axon regeneration at the distal coaptation point compared with the silk^(–) tNGCs at 7 weeks postoperatively. In the 15-mm(critical size) sciatic nerve defect model, we again observed a distinct ingrowth of blood vessels through the tubular walls of silk^(+) tNGCs, but without improved functional recovery at 12 weeks postoperatively. Our data proves that macroporous tNGCs increase the vascular supply of regenerating nerves and facilitate improved axonal regeneration in a short-defect model but not in a critical-size defect model. This study suggests that further optimizatio

关键词： axon regeneration blood vessel functional recovery macroporous nerve lesion peripheral nerve repair sciatic nerve silk-based nerve guidance conduit vascularization

Beginning from the end:the presynaptic terminal as a pathomechanism hub in frontotemporal dementia and amyotrophic lateral sclerosis

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Neural Regeneration Research 2025年第11期20卷 3217-3218页

作者： laura Huggon Emma l.Clayton UK Dementia Research Institute at King’s College london LondonUK Department of Basic and Clinical Neuroscience Institute of Psychiatry Psychology&NeuroscienceKing’s College LondonLondonUK

Frontotemporal dementia and amyotrophic lateral sclerosis:Frontotemporal dementia(F T D)and amyo t rophic lateral sclerosis(AlS)are neurodegenerative diseases with significant overlapping *** these neurodegenerative diseases affect different neuronal populations(with FTD affecting neurons of the frontal and temporal lobes,and AlS affecting upper and lower motor neurons),these two diseases are complexly *** and AlS exist on a disease spectrum,with shared genetic causes,clinical presentations,and pathologies.

关键词： diseases amyotrophic sclerosis

Interventions for vector-borne diseases focused on housing and hygiene in urban areas:a scoping review

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Infectious Diseases of Poverty 2018年第1期7卷 992-1018页

作者： Stephanie Degroote Kate Zinszer Valery ridde University of Montreal Public Health Research Institute MontrealCanada French Institute For Research on sustainable Development(IRD) IRD Paris Descartes University(CEPED)Paris Sorbonne Cities UniversityErl Inserm SagesudParisFrance

Background:Over half the world’s human populations are currently at risk from vector-borne diseases(VBDs),and the heaviest burden is borne by the world’s poorest people,communities,and *** aim of this study was to conduct a review on VBD interventions relevant to housing and hygiene(including sanitation and waste management)in urban *** body:We conducted a scoping review,which involved systematically searching peer-reviewed and grey literature published between 2000 and 2016 using five scientific databases and one database for grey *** data extraction tools were used for data coding and *** assessed the quality of each study using the Mixed Methods Appraisal Tool and extracted descriptive characteristics and data about implementation process and transferability from all studies using the Template for Intervention Description and Replication and ASTAIRE(a tool for analyzing the transferability of health promotion interventions)*** reviewed 44 ***,the studies were judged to be of high risk for *** results suggest multifaceted interventions,particularly community-based interventions,have the potential to achieve wider and more sustained effects than do standard vertical single-component *** evaluations of multifaceted interventions tend to include integrated evaluations,using not only entomological indicators but also acceptability and sustainability ***:This review highlighted the important need for higher quality research in VBDs and improved and standardized reporting of *** research gaps were found regarding qualitative research and implementation research,and results highlighted the need for more interventions focus on sanitation and hygiene practices.

关键词： Vector-borne disease Urban area Housing Hygiene Sanitation Waste management Prevention Systematic mixed method review

Multiple sclerosis is at a checkpoint: advancing the program

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Neural Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon C.Smith Jessica l.Williams Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Biological Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Multiple sclerosis(MS) is a chronic inflammatory and demyelinating disease of the central nervous system(CNS). Patients with MS experience sensory and motor function loss due to myelin and/or axon damage perpetuated b... 详细信息

关键词： Hauser sclerosis damage

Generation of brain vascular heterogeneity:recent advances from the perspective of angiogenesis

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Neural Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael J.lee Ryota l.Matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Molecular Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascular endothelial cells in the brain:The brain displays large energy dynamics and consumption,and this high level of metabolic demands is fulfilled by a continuous supply of glucose and oxygen through its vascular *** vasculature consists of highly divergent blood vessel branches,giving rise to a dense network of capillaries that supply blood to all cells across the *** elaborated vascular network is thought to develop via angiogenesis,a process in which new blood vessels grow from pre-existing *** capillaries exhibit organotypic features distinct from other tissues and are formed primarily by two major endothelial cell(EC)types:those that form the semi-permeable blood-brain barrier(BBB)and those that develop highly permeable pores known as fenestrae(Matsuoka et al.,2022).The structural and functional differences between BBB and fenestrated vascular ECs represent a fundamental feature of brain vasculature and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan Junling lü Chunchi Zhang Dong liang lei Yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie Dang Jia Guo Hanghang Zhou Xuewei lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

Health financing policies in Sub-Saharan Africa:government ownership or donors’influence?A scoping review of policymaking processes

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Global Health Research and Policy 2017年第1期2卷 116-132页

作者： lara Gautier Valéry ridde Department of social and preventive medicine School of Public HealthUniversitéde MontréalMontréalQuébecCanada Public Health Research Institute(IRSPUM) Universitéde MontréalMontréalQuébecCanada Centre d’Etudes en Sciences Sociales sur les Mondes Africains Américains et AsiatiquesUniversitéParis Diderot-Paris VIISorbonne Paris CitéParisFrance

Background:The rise on the international scene of advocacy for universal health coverage(UHC)was accompanied by the promotion of a variety of health financing *** donors presented health insurance,user fee exemption,and results-based financing policies as relevant instruments for achieving UHC in Sub-Saharan ***“donor-driven”push for policies aiming at UHC raises concerns about governments’effective buy-in of such *** the latter has implications on the success of such policies,we searched for evidence of government ownership of the policymaking ***:We conducted a scoping review of the English and French literature from January 2001 to December 2015 on government ownership of decision-making on policies aiming at UHC in Sub-Saharan ***-five(35)results were *** extracted,synthesized and analyzed data in order to provide insights on ownership at five stages of the policymaking process:emergence,formulation,funding,implementation,and ***:The majority of articles(24/35)showed mixed results(*** was identified at one or more levels of policymaking process but not all)in terms of government *** of only five papers provided evidence of ownership at all reviewed policymaking *** results demonstrated some lack of government ownership at any of the five stages,we noticed that donors did not necessarily play a role:other actors’involvement was contributing to undermining government-owned decision-making,such as the private *** also found evidence that both government ownership and donors’influence can successfully ***:Future research should look beyond indicators of government ownership,by analyzing historical factors behind the imbalance of power between the different actors during policy *** is a need to investigate how some national actors become policy champions and thereby influence policy *** order to effectively achiev

关键词： owned policy formulation

Containment measures for emerging and re-emerging vector-borne and other infectious diseases of poverty in urban settings:a scoping review

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Infectious Diseases of Poverty 2018年第1期7卷 976-991页

作者： laurence Campeau Stephanie Degroote Valery ridde Mabel Carabali Kate Zinszer University of Montreal Public Health Research Institute(IRSPUM) MontrealQuebecCanada French Institute For Research on sustainable Development(IRD) IRD-Paris Descartes University(CEPED)Paris Sorbonne Cites UniversityErl Inserm SagesudParisFrance McGill University MontrealQuebecCanada

Background:The emergence and re-emergence of vector-borne and other infectious diseases of poverty pose a threat to the health of populations living in urban and low-income settings.A detailed understanding of intervention strategies,including effectiveness of past outbreak containment,is necessary to improve future *** objective was to determine what is known about the effectiveness of containment measures for emerging and re-emerging vector-borne and other infectious diseases of poverty in urban settings and identify research gaps and implications for public health *** body:We conducted a scoping review and systematically searched peer-reviewed and grey literature published between 2000 and *** data extraction tools were used for data coding and extraction,and data on implementation process and transferability were extracted from all studies.A quality assessment was conducted for each included *** screened 205 full-text articles and reports for a total of 31 articles included in the *** quality of the studies was generally low to *** largest body of evidence concerned control activities for Ebola virus and dengue *** majority of interventions(87%)relied on multiple types of measures,which were grouped into four categories:1)healthcare provision;2)epidemiological investigation and/or surveillance;3)environmental or sanitary interventions;and 4)community-based *** quality of the majority of studies(90%)was poor or moderate,and one-third of the studies did not provide a clear description of the outcomes and of the procedures and/or tools used for the ***:Our results highlight the difficulty of establishing causation when assessing the effect of containment *** that extend beyond solely reporting on effectiveness and take into account the complexity of real-world settings are urgently *** recommend the allocation of research efforts to the evaluation of the

关键词： Vector-borne diseases Containment measures Interventions Urban health Scoping review